@import "https://unpkg.com/boxicons@2.1.4/css/boxicons.min.css";
@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/fef07dbb0973bf53-s.3p2_lha1f2xer.woff2)format("woff2");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/8a480f0b521d4e75-s.1qq4vpdcun5oj.woff2)format("woff2");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/53b9e256198e5412-s.390ncx5urfkfu.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/7178b3e590c64307-s.21jp631_3pja2.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Geist;font-style:normal;font-weight:100 900;font-display:swap;src:url(../media/caa3a2e1cccd8315-s.p.0wgildi0cnwt9.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Geist Fallback;src:local(Arial);ascent-override:95.94%;descent-override:28.16%;line-gap-override:0.0%;size-adjust:104.76%}.geist_a71539c9-module__T19VSG__className{font-family:Geist,Geist Fallback;font-style:normal}.geist_a71539c9-module__T19VSG__variable{--font-geist-sans:"Geist", "Geist Fallback"}
@layer properties{@supports (((-webkit-hyphens:none)) and (not (margin-trim:inline))) or ((-moz-orient:inline) and (not (color:rgb(from red r g b)))){*,:before,:after,::backdrop{--tw-rotate-x:initial;--tw-rotate-y:initial;--tw-rotate-z:initial;--tw-skew-x:initial;--tw-skew-y:initial;--tw-border-style:solid;--tw-font-weight:initial;--tw-tracking:initial;--tw-shadow:0 0 #0000;--tw-shadow-color:initial;--tw-shadow-alpha:100%;--tw-inset-shadow:0 0 #0000;--tw-inset-shadow-color:initial;--tw-inset-shadow-alpha:100%;--tw-ring-color:initial;--tw-ring-shadow:0 0 #0000;--tw-inset-ring-color:initial;--tw-inset-ring-shadow:0 0 #0000;--tw-ring-inset:initial;--tw-ring-offset-width:0px;--tw-ring-offset-color:#fff;--tw-ring-offset-shadow:0 0 #0000;--tw-blur:initial;--tw-brightness:initial;--tw-contrast:initial;--tw-grayscale:initial;--tw-hue-rotate:initial;--tw-invert:initial;--tw-opacity:initial;--tw-saturate:initial;--tw-sepia:initial;--tw-drop-shadow:initial;--tw-drop-shadow-color:initial;--tw-drop-shadow-alpha:100%;--tw-drop-shadow-size:initial;--tw-translate-x:0;--tw-translate-y:0;--tw-translate-z:0}}}@layer theme{:root,:host{--color-white:#fff;--spacing:.25rem;--container-2xl:42rem;--text-xs:.75rem;--text-xs--line-height:calc(1 / .75);--text-sm:.875rem;--text-sm--line-height:calc(1.25 / .875);--text-4xl:2.25rem;--text-4xl--line-height:calc(2.5 / 2.25);--font-weight-semibold:600;--font-weight-black:900;--tracking-tight:-.025em;--default-transition-duration:.15s;--default-transition-timing-function:cubic-bezier(.4, 0, .2, 1);--default-font-family:var(--font-geist-sans);--default-mono-font-family:"SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;--shadow-soft:var(--shadow-soft);--shadow-card:var(--shadow-card)}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.visible{visibility:visible}.static{position:static}.container{width:100%}@media (min-width:40rem){.container{max-width:40rem}}@media (min-width:48rem){.container{max-width:48rem}}@media (min-width:64rem){.container{max-width:64rem}}@media (min-width:80rem){.container{max-width:80rem}}@media (min-width:96rem){.container{max-width:96rem}}.mx-auto{margin-inline:auto}.block{display:block}.flex{display:flex}.grid{display:grid}.hidden{display:none}.inline{display:inline}.inline-flex{display:inline-flex}.table{display:table}.h-5{height:calc(var(--spacing) * 5)}.h-11{height:calc(var(--spacing) * 11)}.min-h-\[60vh\]{min-height:60vh}.w-5{width:calc(var(--spacing) * 5)}.w-11{width:calc(var(--spacing) * 11)}.max-w-2xl{max-width:var(--container-2xl)}.transform{transform:var(--tw-rotate-x,) var(--tw-rotate-y,) var(--tw-rotate-z,) var(--tw-skew-x,) var(--tw-skew-y,)}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.items-start{align-items:flex-start}.justify-center{justify-content:center}.gap-4{gap:calc(var(--spacing) * 4)}.rounded-full{border-radius:3.40282e38px}.border{border-style:var(--tw-border-style);border-width:1px}.border-border\/80{border-color:var(--border-color)}@supports (color:color-mix(in lab, red, red)){.border-border\/80{border-color:color-mix(in oklab, var(--border-color) 80%, transparent)}}.bg-primary{background-color:var(--primary)}.bg-surface\/90{background-color:var(--surface)}@supports (color:color-mix(in lab, red, red)){.bg-surface\/90{background-color:color-mix(in oklab, var(--surface) 90%, transparent)}}.px-5{padding-inline:calc(var(--spacing) * 5)}.py-3{padding-block:calc(var(--spacing) * 3)}.py-16{padding-block:calc(var(--spacing) * 16)}.text-4xl{font-size:var(--text-4xl);line-height:var(--tw-leading,var(--text-4xl--line-height))}.text-sm{font-size:var(--text-sm);line-height:var(--tw-leading,var(--text-sm--line-height))}.text-xs{font-size:var(--text-xs);line-height:var(--tw-leading,var(--text-xs--line-height))}.font-black{--tw-font-weight:var(--font-weight-black);font-weight:var(--font-weight-black)}.font-semibold{--tw-font-weight:var(--font-weight-semibold);font-weight:var(--font-weight-semibold)}.tracking-\[0\.18em\]{--tw-tracking:.18em;letter-spacing:.18em}.tracking-tight{--tw-tracking:var(--tracking-tight);letter-spacing:var(--tracking-tight)}.text-primary{color:var(--primary)}.text-text{color:var(--text)}.text-white{color:var(--color-white)}.lowercase{text-transform:lowercase}.uppercase{text-transform:uppercase}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.shadow-soft{--tw-shadow:var(--shadow-soft);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.ring{--tw-ring-shadow:var(--tw-ring-inset,) 0 0 0 calc(1px + var(--tw-ring-offset-width)) var(--tw-ring-color,currentcolor);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}.filter{filter:var(--tw-blur,) var(--tw-brightness,) var(--tw-contrast,) var(--tw-grayscale,) var(--tw-hue-rotate,) var(--tw-invert,) var(--tw-saturate,) var(--tw-sepia,) var(--tw-drop-shadow,)}.transition{transition-property:color,background-color,border-color,outline-color,text-decoration-color,fill,stroke,--tw-gradient-from,--tw-gradient-via,--tw-gradient-to,opacity,box-shadow,transform,translate,scale,rotate,filter,-webkit-backdrop-filter,backdrop-filter,display,content-visibility,overlay,pointer-events;transition-timing-function:var(--tw-ease,var(--default-transition-timing-function));transition-duration:var(--tw-duration,var(--default-transition-duration))}@media (hover:hover){.hover\:-translate-y-0\.5:hover{--tw-translate-y:calc(var(--spacing) * -.5);translate:var(--tw-translate-x) var(--tw-translate-y)}.hover\:shadow-lg:hover{--tw-shadow:0 10px 15px -3px var(--tw-shadow-color,#0000001a), 0 4px 6px -4px var(--tw-shadow-color,#0000001a);box-shadow:var(--tw-inset-shadow), var(--tw-inset-ring-shadow), var(--tw-ring-offset-shadow), var(--tw-ring-shadow), var(--tw-shadow)}}}:root{--primary:#2563eb;--primary-light:#eff6ff;--bg-app:#f1f5f9;--bg-app-2:#e2e8f0;--bg-card:#fff;--text-main:#0f172a;--text-muted:var(--text-muted);--border:#e2e8f0;--yt-red:red;--safe-bottom:env(safe-area-inset-bottom,0px);--content-max:1180px;--background:var(--bg-app);--foreground:var(--text-main);--surface:var(--bg-card);--muted:var(--primary-light);--border-color:var(--border);--text:var(--text-main);--shadow-soft:0 20px 45px #0f172a14;--shadow-card:0 24px 60px #0f172a1f}html.dark{--primary:#60a5fa;--primary-light:#1e293b;--bg-app:#07111f;--bg-app-2:#0b1523;--bg-card:#0f172a;--text-main:#e5eefb;--text-muted:var(--text-muted);--border:#1e293b;--background:var(--bg-app);--foreground:var(--text-main);--surface:var(--bg-card);--muted:var(--primary-light);--border-color:var(--border);--text:var(--text-main);--shadow-soft:0 20px 45px #02061759;--shadow-card:0 24px 60px #02061773}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;margin:0;padding:0}html{scroll-behavior:smooth}body{min-height:100svh;color:var(--text-main);background:radial-gradient(circle at top left, #2563eb1f, transparent 28%), radial-gradient(circle at top right, #0ea5e91f, transparent 24%), linear-gradient(180deg, #f8fafc 0%, var(--bg-app) 35%, var(--bg-app-2) 100%);font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow-x:hidden}html.dark body{background:radial-gradient(circle at top left, #60a5fa1f, transparent 28%), radial-gradient(circle at top right, #38bdf81f, transparent 24%), linear-gradient(180deg, #020617 0%, var(--bg-app) 35%, var(--bg-app-2) 100%)}a{color:inherit;text-decoration:none}img{-webkit-user-drag:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;max-width:100%}.protect,.pdf-viewer{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}.app-shell{width:min(100%, var(--content-max));flex-direction:column;min-height:100svh;margin:0 auto;display:flex;position:relative}.app-shell:before,.app-shell:after{content:"";filter:blur(72px);pointer-events:none;z-index:-1;border-radius:50%;width:20rem;height:20rem;position:fixed}.app-shell:before{background:#2563eb29;top:-7rem;left:-6rem}.app-shell:after{background:#0ea5e91f;bottom:8rem;right:-8rem}.app-header{z-index:20;background:#fffffff5;border-bottom:1px solid #e2e8f0cc;justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 1rem;display:flex;position:sticky;top:0;box-shadow:0 8px 24px #0f172a0a}html.dark .app-header{background:#0f172af5;border-bottom-color:#1e293bcc}.offline-banner{color:#b91c1c;text-align:center;z-index:100;background:#fef2f2;border-bottom:1px solid #fecaca;justify-content:center;align-items:center;gap:.45rem;padding:.55rem .75rem;font-size:.78rem;font-weight:600;line-height:1.4;animation:.3s slide-down;display:flex}.offline-banner i{flex-shrink:0;font-size:1rem}html.dark .offline-banner{color:#fca5a5;background:#7f1d1d4d;border-bottom-color:#dc262666}@keyframes slide-down{0%{opacity:0;transform:translateY(-100%)}to{opacity:1;transform:translateY(0)}}.sw-update-toast{z-index:9999;color:#fff;background:#1e293b;border-radius:12px;align-items:center;gap:.75rem;padding:.85rem 1.25rem;font-size:.85rem;font-weight:600;animation:.3s slide-up;display:flex;position:fixed;bottom:1rem;left:50%;transform:translate(-50%);box-shadow:0 12px 40px #0f172a40}.sw-update-toast button{background:var(--primary);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:.4rem .9rem;font-size:.78rem;font-weight:700}@keyframes slide-up{0%{opacity:0;transform:translate(-50%)translateY(20px)}to{opacity:1;transform:translate(-50%)translateY(0)}}html.dark .sw-update-toast{background:#0f172a;box-shadow:0 12px 40px #0006}.app-logo-link{color:inherit;align-items:center;gap:.55rem;text-decoration:none;display:inline-flex}.app-logo-img{object-fit:cover;border-radius:10px}.app-header h1{letter-spacing:-.03em;font-size:1.35rem;font-weight:800}.app-header h1 span,.card-code,.stat-bubble i,.pill-btn.active,.app-card:hover .card-code{color:var(--primary)}.channel-badge{color:#e11d48;white-space:nowrap;background:#fff1f2;border:1px solid #fecdd3;border-radius:999px;align-items:center;gap:.35rem;padding:.45rem .8rem;font-size:.75rem;font-weight:700;text-decoration:none;display:inline-flex}html.dark .channel-badge{color:#fda4af;background:#4c0519;border-color:#9f1239}.app-viewport{padding:0 0 calc(104px + var(--safe-bottom)) 0;flex:1;overflow-y:auto}.welcome-hero,.youtube-embedded-banner,.app-card,.sheet-body,.bottom-sheet{-webkit-backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #e2e8f0e6}html.dark .welcome-hero,html.dark .youtube-embedded-banner,html.dark .app-card,html.dark .sheet-body,html.dark .bottom-sheet{background:#0f172af0;border-color:#24324ae6}.welcome-hero{border-radius:24px;margin:.85rem .85rem 1rem;padding:1rem;box-shadow:0 18px 40px #0f172a0f}.welcome-hero h2{letter-spacing:-.03em;margin-bottom:.4rem;font-size:1.6rem;line-height:1.1}.welcome-hero p{color:var(--text-muted);margin-bottom:1rem;font-size:.92rem;line-height:1.5}.hero-top{align-items:center;gap:1rem;margin-bottom:1rem;display:flex}.hero-top>div{flex:1;min-width:0}.hero-top>div h2{margin-bottom:.2rem}.hero-top>div p{margin-bottom:0}.app-stat-row{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;display:grid}.stat-bubble{background:linear-gradient(#f8fafc,#eef2ff);border-radius:18px;align-items:center;gap:.7rem;padding:.85rem;display:flex}html.dark .stat-bubble{background:linear-gradient(#0f172a,#1e293b)}.stat-bubble i{font-size:1.45rem}.stat-val{font-size:.95rem;font-weight:800}.stat-lbl{color:var(--text-muted);font-size:.72rem}.section-headline{letter-spacing:.08em;text-transform:uppercase;color:var(--text-muted);margin:0 1rem .7rem;font-size:.78rem;font-weight:800}.semester-scroller{scrollbar-width:none;scroll-snap-type:x proximity;gap:.5rem;padding:0 1rem 1rem;display:flex;overflow-x:auto}.semester-scroller::-webkit-scrollbar{display:none}.pill-btn{border:1px solid var(--border);color:var(--text-muted);white-space:nowrap;cursor:pointer;scroll-snap-align:start;background:#fffffff2;border-radius:999px;padding:.7rem 1.1rem;font-size:.85rem;font-weight:700;box-shadow:0 8px 18px #0f172a0a}html.dark .pill-btn{background:#0f172af2;border-color:#1e293bcc}.pill-btn.active{color:#fff;background:linear-gradient(135deg,#2563eb,#1d4ed8);border-color:#0000;box-shadow:0 12px 24px #2563eb3d}.subject-stack{grid-template-columns:1fr;gap:.75rem;padding:0 1rem;display:grid}.app-card{cursor:pointer;border-radius:18px;justify-content:space-between;align-items:center;gap:1rem;min-height:78px;padding:1rem;transition:transform .16s,box-shadow .16s,border-color .16s;display:flex;box-shadow:0 12px 26px #0f172a0d}.app-card:active{transform:scale(.99)}.card-left{flex-direction:column;gap:.25rem;min-width:0;display:flex}.card-code{letter-spacing:.03em;font-size:.95rem;font-weight:600}.card-title{font-size:1rem;font-weight:700;line-height:1.35}.card-meta-inline{color:var(--text-muted);font-size:.75rem;line-height:1.3}.card-chevron{color:var(--text-muted);flex-shrink:0;font-size:1.35rem}.youtube-embedded-banner{color:#fff;background:linear-gradient(135deg,#0f172a 0%,#1e293b 100%);border-radius:20px;justify-content:space-between;align-items:center;gap:1rem;margin:1.25rem 1rem 0;padding:1.1rem;text-decoration:none;display:flex;box-shadow:0 16px 30px #0f172a1f}.yt-banner-left{flex-direction:column;gap:.25rem;min-width:0;display:flex}.yt-banner-left span{color:#f43f5e;letter-spacing:.08em;text-transform:uppercase;font-size:.68rem;font-weight:800}.yt-banner-left h4{font-size:1.02rem;font-weight:800}.yt-banner-left p{color:#cbd5e1;font-size:.76rem;line-height:1.4}.yt-play-icon{background:red;border-radius:999px;flex-shrink:0;place-items:center;width:46px;height:46px;display:grid;box-shadow:0 12px 20px #ff000047}.lecture-section{margin:1.5rem 1rem 0;padding-bottom:.25rem}.lecture-section-head{justify-content:space-between;align-items:end;gap:1rem;margin-bottom:.8rem;display:flex}.lecture-section-head h3{letter-spacing:-.02em;font-size:1.05rem;font-weight:800}.lecture-section-head p{color:var(--text-muted);margin-top:.2rem;font-size:.78rem}.lecture-grid{grid-template-columns:1fr;gap:.9rem;display:grid}.lecture-card{color:inherit;background:#fffffff2;border:1px solid #e2e8f0e6;border-radius:18px;flex-direction:column;text-decoration:none;display:flex;overflow:hidden;box-shadow:0 12px 26px #0f172a0d}html.dark .lecture-card{background:#0f172af2;border-color:#24324ae6}.lecture-thumb{aspect-ratio:16/9;background:#0f172a;position:relative;overflow:hidden}.lecture-thumb img{object-fit:cover;width:100%;height:100%;display:block}.lecture-duration{color:#fff;background:#0f172ad1;border-radius:6px;padding:.25rem .45rem;font-size:.7rem;font-weight:700;position:absolute;bottom:.7rem;right:.7rem}.lecture-body{flex-direction:column;gap:.4rem;padding:.85rem .9rem .95rem;display:flex}.lecture-badges{flex-wrap:wrap;gap:.4rem;display:flex}.lecture-badge{color:var(--primary);letter-spacing:.04em;text-transform:uppercase;background:#eff6ff;border-radius:999px;padding:.24rem .5rem;font-size:.68rem;font-weight:800}html.dark .lecture-badge{color:var(--primary);background:#1e293b}.lecture-title{font-size:.95rem;font-weight:700;line-height:1.35}.lecture-meta{color:var(--text-muted);font-size:.76rem}.lecture-card:active{transform:scale(.99)}.lecture-card-wrap{break-inside:avoid}.lecture-notes{border-top:1px solid var(--border);background:var(--surface);border-radius:0 0 18px 18px;padding:.6rem .9rem .7rem}.lecture-notes-head{color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;align-items:center;gap:.3rem;margin-bottom:.4rem;font-size:.72rem;font-weight:700;display:flex}.lecture-notes-list{flex-direction:column;gap:.3rem;display:flex}.lecture-note-link{color:var(--primary);align-items:center;gap:.35rem;padding:.3rem 0;font-size:.78rem;line-height:1.3;text-decoration:none;transition:opacity .2s;display:flex}.lecture-note-link:hover{opacity:.75}.lecture-note-link i{flex-shrink:0;font-size:.9rem}.lecture-notes-more{color:var(--text-muted);padding:.15rem 0;font-size:.72rem}.lecture-notes-placeholder{color:var(--text-muted);align-items:center;gap:.35rem;padding:.3rem 0;font-size:.75rem;display:flex}.bottom-nav{width:min(calc(100% - 1rem), var(--content-max));padding:.6rem 0 calc(.45rem + var(--safe-bottom));-webkit-backdrop-filter:blur(12px);z-index:100;background:#fffffff2;border:1px solid #e2e8f0eb;border-radius:20px;justify-content:space-around;gap:.35rem;display:flex;position:fixed;bottom:.75rem;left:50%;transform:translate(-50%);box-shadow:0 18px 34px #0f172a24}html.dark .bottom-nav{background:#0f172af2;border-color:#24324aeb}.bottom-nav--dimmed{opacity:.25;transition:opacity .3s}.nav-item{min-width:0;color:var(--text-muted);cursor:pointer;background:0 0;border:none;flex-direction:column;flex:1;align-items:center;gap:.2rem;padding:.1rem .15rem;font-size:.65rem;font-weight:700;display:flex}.nav-item i{font-size:1.4rem}.nav-item.active{color:var(--primary)}.bottom-sheet-backdrop{opacity:0;pointer-events:none;z-index:200;background:#0f172a80;transition:opacity .25s;position:fixed;inset:0}.bottom-sheet-backdrop.open{opacity:1;pointer-events:auto}.bottom-sheet{z-index:201;border-radius:24px 24px 0 0;flex-direction:column;width:min(100%,760px);min-height:50vh;max-height:82vh;transition:transform .3s cubic-bezier(.25,1,.5,1);display:flex;position:fixed;bottom:0;left:50%;transform:translate(-50%)translateY(100%);box-shadow:0 -10px 32px #0f172a2e}.bottom-sheet.open{transform:translate(-50%)translateY(0)}.sheet-handle{background:#cbd5e1;border-radius:999px;flex-shrink:0;width:36px;height:5px;margin:.75rem auto .25rem}html.dark .sheet-handle{background:#475569}.sheet-header{border-bottom:1px solid var(--border);padding:.55rem 1rem 1rem;position:relative}html.dark .sheet-header{border-bottom-color:var(--border)}.sheet-close{width:32px;height:32px;color:var(--text-main);cursor:pointer;background:#f1f5f9;border:none;border-radius:999px;place-items:center;display:grid;position:absolute;top:.5rem;right:1rem}html.dark .sheet-close{color:var(--text-main);background:#1e293b}.sheet-body{flex:1;padding:1rem;overflow-y:auto}.badge-row{flex-wrap:wrap;gap:.5rem;margin:.25rem 0 1rem;display:flex}.sheet-badge{background:#f1f5f9;border-radius:999px;padding:.35rem .7rem;font-size:.75rem;font-weight:700}html.dark .sheet-badge{background:#1e293b}.sheet-badge.accent{background:var(--primary-light);color:var(--primary)}.syllabus-block-title{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.8rem;font-size:.78rem;font-weight:800}.app-list{flex-direction:column;gap:.85rem;list-style:none;display:flex}.app-list li{color:#334155;padding-left:1.55rem;font-size:.9rem;line-height:1.45;position:relative}html.dark .app-list li{color:#cbd5e1}.app-list li:before{content:"";color:var(--primary);font-size:1.1rem;font-weight:700;position:absolute;top:1px;left:0;font-family:boxicons!important}.app-search{width:100%;position:relative}.app-search-icon{color:var(--text-muted);pointer-events:none;font-size:1.1rem;position:absolute;top:50%;left:.85rem;transform:translateY(-50%)}.app-search input{border:1px solid var(--border);background:var(--bg-card);width:100%;color:var(--text-main);border-radius:14px;outline:none;padding:.75rem 1rem .75rem 2.5rem;font-size:.88rem;transition:border-color .2s,box-shadow .2s}.app-search input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb26}html.dark .app-search input:focus{box-shadow:0 0 0 3px #60a5fa26}.notes-tree-controls{-webkit-backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:20px;margin:0 1rem 1.25rem;padding:1.15rem;box-shadow:0 12px 26px #0f172a0d}html.dark .notes-tree-controls{background:#0f172af0;border-color:#24324ae6}.notes-tree-search-row{flex-direction:column;gap:.75rem;margin-bottom:.85rem;display:flex}html.dark .notes-tree-controls .app-search input{background:#0f172a99}.notes-tree-filters{flex-wrap:wrap;gap:.5rem;display:flex}.notes-entry{-webkit-backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:20px;margin:0 1rem 1rem;padding:1.15rem;transition:transform .16s,box-shadow .16s;box-shadow:0 12px 26px #0f172a0d}html.dark .notes-entry{background:#0f172af0;border-color:#24324ae6}.notes-entry:hover{transform:translateY(-2px);box-shadow:0 18px 36px #0f172a1a}.notes-entry-header{flex-direction:column;gap:.35rem;margin-bottom:1rem;display:flex}.notes-entry-sem{letter-spacing:.1em;text-transform:uppercase;color:var(--primary);font-size:.68rem;font-weight:800}.notes-entry-title{color:var(--text-main);font-size:1.05rem;font-weight:800;line-height:1.3}.notes-entry-meta{color:var(--text-muted);font-size:.78rem}.notes-entry-action{background:var(--primary-light);color:var(--primary);border-radius:999px;align-self:flex-start;align-items:center;gap:.4rem;margin-top:.35rem;padding:.5rem .9rem;font-size:.78rem;font-weight:700;text-decoration:none;transition:background .2s,color .2s;display:inline-flex}.notes-entry-action:hover{background:var(--primary);color:#fff}.notes-entry-action i{font-size:.85rem}.notes-entry-grid{grid-template-columns:1fr;gap:.75rem;display:grid}.notes-col{border:1px solid var(--border);background:#f1f5f980;border-radius:14px;padding:.9rem}html.dark .notes-col{background:#0f172a80}.notes-col-head{align-items:center;gap:.45rem;margin-bottom:.75rem;display:flex}.notes-col-head i{color:var(--primary);font-size:1rem}.notes-col-head i.amber{color:#f59e0b}html.dark .notes-col-head i.amber{color:#fbbf24}.notes-col-head span{letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);font-size:.68rem;font-weight:800}.notes-item{color:inherit;background:#f1f5f9b3;border-radius:12px;justify-content:space-between;align-items:center;gap:.6rem;padding:.6rem .8rem;font-size:.85rem;font-weight:500;text-decoration:none;transition:background .15s,transform .15s;display:flex}html.dark .notes-item{background:#1e293b99}.notes-item:hover{background:#e2e8f0e6;transform:translate(3px)}html.dark .notes-item:hover{background:#334155b3}.notes-item-label{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.notes-item-tag{text-transform:uppercase;letter-spacing:.06em;color:var(--primary);background:#2563eb1a;border-radius:6px;flex-shrink:0;padding:.2rem .45rem;font-size:.6rem;font-weight:800}.notes-item-tag.amber{color:#f59e0b;background:#f59e0b1a}html.dark .notes-item-tag.amber{color:#fbbf24}.notes-empty{-webkit-backdrop-filter:blur(12px);text-align:center;background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:20px;margin:0 1rem 1rem;padding:2rem 1rem}html.dark .notes-empty{background:#0f172af0;border-color:#24324ae6}.notes-empty p{color:var(--text-muted);font-size:.88rem}.notes-item-empty{color:var(--text-muted);background:#f1f5f966;border-radius:10px;padding:.5rem .75rem;font-size:.78rem;font-style:italic}html.dark .notes-item-empty{background:#1e293b66}.nt-unit-card{border:1px solid var(--border);background:#f1f5f966;border-radius:14px;align-items:center;gap:.75rem;padding:.85rem;transition:background .15s;display:flex}html.dark .nt-unit-card{background:#0f172a4d}.nt-unit-info{flex-direction:column;flex:1;gap:.25rem;min-width:0;display:flex}.nt-unit-title{font-size:.88rem;font-weight:700;line-height:1.3}.nt-unit-summary{color:var(--text-muted);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:.75rem;line-height:1.4;display:-webkit-box;overflow:hidden}.nt-unit-badges{flex-wrap:wrap;gap:.35rem;margin-top:.2rem;display:flex}.nt-badge{letter-spacing:.04em;text-transform:uppercase;border-radius:6px;align-items:center;gap:.2rem;padding:.2rem .5rem;font-size:.62rem;font-weight:800;display:inline-flex}.nt-badge i{font-size:.72rem}.nt-badge.pdf{color:#ef4444;background:#ef444414}html.dark .nt-badge.pdf{background:#ef444426}.nt-badge.hw{color:#d97706;background:#f59e0b14}html.dark .nt-badge.hw{background:#f59e0b26}.nt-unit-open{background:var(--primary-light);color:var(--primary);white-space:nowrap;border-radius:999px;flex-shrink:0;align-items:center;gap:.15rem;padding:.45rem .75rem;font-size:.75rem;font-weight:700;text-decoration:none;transition:background .15s,color .15s;display:inline-flex}.nt-unit-open:hover{background:var(--primary);color:#fff}.nt-unit-open i{font-size:.9rem}.completion-toggle{text-transform:uppercase;letter-spacing:.1em;cursor:pointer;border:1px solid var(--border);color:var(--text-main);background:#fffffff2;border-radius:999px;align-items:center;gap:.4rem;padding:.55rem 1rem;font-size:.72rem;font-weight:800;transition:all .25s;display:inline-flex;box-shadow:0 6px 14px #0f172a0f}.completion-toggle:hover{transform:scale(1.02);box-shadow:0 10px 20px #0f172a1a}.completion-toggle:active{transform:scale(.98)}.completion-toggle.completed{color:#fff;background:linear-gradient(135deg,#10b981,#059669);border-color:#0000;box-shadow:0 10px 24px #10b98140}html.dark .completion-toggle.completed{background:linear-gradient(135deg,#10b981,#047857)}.completion-toggle i{font-size:1.1rem}html.dark .completion-toggle{background:#0f172af2}.header-actions{align-items:center;gap:.5rem;display:flex}.theme-toggle-btn{border:1px solid var(--border);width:2.75rem;height:2.75rem;color:var(--text-main);cursor:pointer;background:#ffffffe6;border-radius:999px;justify-content:center;align-items:center;transition:transform .2s,box-shadow .2s;display:inline-flex;box-shadow:0 12px 26px #0f172a0f}.theme-toggle-btn:hover{transform:translateY(-2px);box-shadow:0 18px 32px #0f172a1a}.theme-toggle-btn i{font-size:1.25rem}html.dark .theme-toggle-btn{background:#0f172ae6}html.dark .theme-toggle-btn i{color:#fbbf24}.dashboard-card{-webkit-backdrop-filter:blur(12px);color:inherit;background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:22px;padding:1.1rem;text-decoration:none;transition:transform .18s,box-shadow .18s;display:block;box-shadow:0 12px 26px #0f172a0d}.dashboard-card:hover{box-shadow:var(--shadow-card);transform:translateY(-3px)}html.dark .dashboard-card{background:#0f172af0;border-color:#24324ae6}.dashboard-card-head{justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:.9rem;display:flex}.dashboard-card-sem{letter-spacing:.1em;text-transform:uppercase;color:var(--primary);font-size:.68rem;font-weight:800}.dashboard-card-title{letter-spacing:-.02em;color:var(--text-main);margin-top:.3rem;font-size:1.15rem;font-weight:900}.dashboard-card-open{color:var(--primary);background:#2563eb1a;border-radius:999px;flex-shrink:0;padding:.3rem .7rem;font-size:.72rem;font-weight:700}.dashboard-card-subjects{grid-template-columns:1fr;gap:.65rem;display:grid}.dashboard-subject-box{background:var(--bg-app);border:1px solid var(--border);border-radius:14px;padding:.85rem}html.dark .dashboard-subject-box{background:#0f172a66}.dashboard-subject-code{color:var(--primary);letter-spacing:.05em;font-size:.68rem;font-weight:800}.dashboard-subject-name{color:var(--text-main);margin-top:.2rem;font-size:.9rem;font-weight:600}.dashboard-subject-desc{color:var(--text-muted);margin-top:.2rem;font-size:.72rem;line-height:1.5}@media (min-width:640px){.dashboard-card-subjects{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1024px){.dashboard-card-subjects{grid-template-columns:repeat(3,minmax(0,1fr))}}.progress-dashboard{gap:.9rem;display:grid}.progress-card{-webkit-backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:20px;padding:1.1rem;box-shadow:0 12px 26px #0f172a0d}html.dark .progress-card{background:#0f172af0;border-color:#24324ae6}.progress-label{letter-spacing:.1em;text-transform:uppercase;color:var(--primary);font-size:.68rem;font-weight:800}.progress-value{letter-spacing:-.02em;color:var(--text-main);margin-top:.3rem;font-size:1.6rem;font-weight:900}.progress-desc{color:var(--text-muted);margin-top:.4rem;font-size:.82rem;line-height:1.45}.progress-bar-track{background:var(--bg-app-2);border-radius:999px;height:8px;margin-top:1rem;overflow:hidden}html.dark .progress-bar-track{background:#1e293b99}.progress-bar-fill{background:linear-gradient(90deg, var(--primary), #f59e0b);border-radius:999px;height:100%;transition:width .4s}.metrics-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.65rem;margin-top:.9rem;display:grid}.metric-box{background:var(--bg-app);border:1px solid var(--border);border-radius:14px;padding:.9rem}html.dark .metric-box{background:#0f172a80}.metric-box-label{text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);font-size:.65rem;font-weight:800}.metric-box-value{letter-spacing:-.02em;color:var(--text-main);margin-top:.35rem;font-size:1.4rem;font-weight:900}@media (min-width:1024px){.progress-dashboard{grid-template-columns:1.4fr .9fr}}.upload-card{-webkit-backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:22px;padding:1.25rem;box-shadow:0 12px 26px #0f172a0d}html.dark .upload-card{background:#0f172af0;border-color:#24324ae6}.upload-field{margin-bottom:1.1rem}.upload-label{text-transform:uppercase;letter-spacing:.08em;color:var(--text-muted);margin-bottom:.4rem;font-size:.72rem;font-weight:800;display:block}.upload-select{border:1px solid var(--border);background:var(--bg-card);width:100%;color:var(--text-main);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-position:right .9rem center;background-repeat:no-repeat;border-radius:14px;outline:none;padding:.75rem .9rem;font-size:.88rem;transition:border-color .2s,box-shadow .2s}.upload-select:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb26}html.dark .upload-select:focus{box-shadow:0 0 0 3px #60a5fa26}.upload-select:disabled{opacity:.5;cursor:not-allowed}html.dark .upload-select{background-color:#0f172a99}.upload-radio-group{gap:.5rem;display:flex}.upload-radio-btn{border:1px solid var(--border);background:var(--bg-card);color:var(--text-muted);cursor:pointer;border-radius:14px;flex:1;padding:.65rem .8rem;font-size:.82rem;font-weight:700;transition:all .2s}html.dark .upload-radio-btn{background:#0f172a99}.upload-radio-btn.active{border-color:var(--primary);background:var(--primary-light);color:var(--primary)}html.dark .upload-radio-btn.active{color:var(--primary);background:#2563eb26}.upload-file-area{position:relative}.upload-file-input{opacity:0;pointer-events:none;width:1px;height:1px;position:absolute}.upload-file-label{border:2px dashed var(--border);background:var(--bg-card);color:var(--text-muted);cursor:pointer;border-radius:14px;align-items:center;gap:.6rem;padding:.85rem 1rem;font-size:.85rem;font-weight:600;transition:border-color .2s,background .2s;display:flex}.upload-file-label:hover{border-color:var(--primary);background:var(--primary-light)}html.dark .upload-file-label:hover{background:#2563eb14}.upload-file-size{color:var(--text-muted);margin-left:auto;font-size:.72rem;font-weight:500}.upload-actions{gap:.65rem;margin-top:1.25rem;display:flex}.upload-btn{color:#fff;cursor:pointer;background:linear-gradient(135deg,#2563eb,#1d4ed8);border:none;border-radius:16px;flex:1;justify-content:center;align-items:center;gap:.45rem;padding:.8rem 1rem;font-size:.88rem;font-weight:800;transition:transform .16s,box-shadow .16s;display:inline-flex;box-shadow:0 12px 24px #2563eb3d}.upload-btn:active{transform:scale(.98)}.upload-btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}.upload-btn i{font-size:1.15rem}.upload-btn-secondary{color:var(--text-muted);box-shadow:none;border:1px solid var(--border);background:0 0;flex:none}html.dark .upload-btn-secondary{background:#0f172a99}.upload-message{border-radius:14px;align-items:flex-start;gap:.55rem;margin-top:1rem;padding:.9rem;font-size:.85rem;line-height:1.45;display:flex}.upload-message i{flex-shrink:0;margin-top:1px;font-size:1.2rem}.upload-message-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}html.dark .upload-message-error{color:#fca5a5;background:#7f1d1d4d;border-color:#dc262666}.upload-message-success{color:#166534;background:#f0fdf4;border:1px solid #bbf7d0;flex-direction:column}html.dark .upload-message-success{color:#86efac;background:#16653440;border-color:#22c55e4d}.upload-result-details{flex-direction:column;gap:.3rem;font-size:.82rem;display:flex}.upload-result-details code{word-break:break-all;background:#0000000f;border-radius:4px;padding:.1rem .3rem;font-size:.75rem}html.dark .upload-result-details code{background:#ffffff14}.upload-result-link{color:var(--primary);word-break:break-all;text-decoration:underline}.upload-result-hint{opacity:.85;border-top:1px solid #00000014;margin-top:.5rem;padding-top:.5rem;font-size:.78rem}.upload-result-hint code{background:#0000000f;border-radius:4px;padding:.1rem .3rem;font-size:.75rem}html.dark .upload-result-hint code{background:#ffffff14}.upload-path-preview{background:var(--bg-app);border:1px solid var(--border);border-radius:12px;margin-top:1rem;padding:.7rem .9rem}html.dark .upload-path-preview{background:#0f172a80}.upload-path-preview code{word-break:break-all;color:var(--text-muted);font-size:.78rem;display:block}@media (min-width:768px){.notes-tree-controls,.notes-entry,.notes-empty{margin-left:1.35rem;margin-right:1.35rem}.notes-entry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (min-width:1024px){.notes-entry-header{flex-direction:row;justify-content:space-between;align-items:flex-start}.notes-entry-action{margin-top:0}}@media (min-width:768px){.app-header{border-radius:0 0 24px 24px;padding:1rem 1.35rem}.welcome-hero,.youtube-embedded-banner,.section-headline,.semester-scroller,.subject-stack{margin-left:1.35rem;margin-right:1.35rem}.welcome-hero{padding:1.25rem}.subject-stack{grid-template-columns:repeat(2,minmax(0,1fr));gap:.95rem;padding:0}.app-card{min-height:92px;padding:1.1rem 1.15rem}.youtube-embedded-banner{padding:1.25rem}.lecture-section{margin:1.65rem 1.35rem 0}.lecture-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.sheet-body{padding:1.35rem}}@media (min-width:1024px){.app-header{border:1px solid #e2e8f0d9;margin:1rem 1.35rem 0}html.dark .app-header{border-color:#1e293bcc}.welcome-hero{grid-template-columns:minmax(0,1.35fr) minmax(280px,.9fr);align-items:end;gap:1.25rem;padding:1.5rem;display:grid}.welcome-hero h2{font-size:2.2rem}.welcome-hero p{max-width:58ch;margin-bottom:0;font-size:1rem}.app-stat-row{grid-template-columns:1fr}.semester-scroller{flex-wrap:wrap;gap:.65rem;overflow-x:visible}.subject-stack,.lecture-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.app-card{min-height:104px}.bottom-nav{width:min(100% - 2rem,940px)}.bottom-sheet{border-radius:28px;width:min(760px,100% - 2rem);bottom:1.1rem}.upload-card{max-width:640px;margin:0 auto}}.unit-hero{-webkit-backdrop-filter:blur(12px);background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:24px;margin:.85rem .85rem 0;padding:1rem;box-shadow:0 18px 40px #0f172a0f}html.dark .unit-hero{background:#0f172af0;border-color:#24324ae6}.unit-hero-top{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:.75rem;display:flex}.unit-hero-title{letter-spacing:-.02em;margin-top:.6rem;font-size:1.35rem;font-weight:800;line-height:1.2}.unit-hero-desc{color:var(--text-muted);margin-top:.35rem;margin-bottom:0;font-size:.88rem;line-height:1.5}.unit-notes-section{margin-top:1rem;padding:0 .85rem}.unit-notes-section .section-headline{margin-bottom:.6rem;margin-left:.15rem}.unit-notes-list{flex-direction:column;gap:.65rem;display:flex}.unit-note-card{-webkit-backdrop-filter:blur(12px);color:inherit;background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:16px;align-items:center;gap:.75rem;min-height:60px;padding:.9rem 1rem;text-decoration:none;transition:transform .15s,box-shadow .15s;display:flex;box-shadow:0 8px 20px #0f172a0a}html.dark .unit-note-card{background:#0f172af0;border-color:#24324ae6}.unit-note-card:active{transform:scale(.98)}.unit-note-icon{flex-shrink:0;font-size:1.35rem}.unit-note-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1;min-width:0;font-size:.88rem;font-weight:600;line-height:1.35;display:-webkit-box;overflow:hidden}.unit-note-dl{color:var(--text-muted);flex-shrink:0;font-size:1.25rem}.unit-note-empty,.unit-coming-soon{border:1px dashed var(--border);background:#f1f5f980;border-radius:14px;align-items:center;gap:.6rem;padding:1rem;display:flex}html.dark .unit-note-empty,html.dark .unit-coming-soon{background:#1e293b4d}.unit-note-empty i,.unit-coming-soon i{color:var(--text-muted);flex-shrink:0;font-size:1.15rem}.unit-note-empty-label{color:var(--text-muted);font-size:.82rem;font-style:italic}.unit-coming-soon{align-items:center;gap:.65rem;margin:.5rem 0;padding:.9rem 1rem;display:flex}.unit-coming-soon i{color:var(--text-muted);flex-shrink:0;font-size:1.3rem}.unit-coming-soon span{color:var(--text-muted);font-size:.85rem;line-height:1.4}.unit-back-row{margin-top:.25rem;padding:.85rem}@media (min-width:768px){.unit-hero{margin:.85rem 1.35rem 0;padding:1.25rem}.unit-notes-section{padding:0 1.35rem}.unit-hero-title{font-size:1.6rem}.unit-back-row{padding:.85rem 1.35rem}.unit-notes-list{grid-template-columns:repeat(2,1fr);gap:.75rem;display:grid}}.back-nav{align-items:center;padding:.5rem 1rem 0;display:flex}.back-nav-link{color:var(--primary);border-radius:12px;align-items:center;gap:.15rem;min-height:44px;padding:.4rem .65rem;font-size:.85rem;font-weight:700;text-decoration:none;transition:background .15s;display:inline-flex}.back-nav-link:active{background:var(--primary-light)}.back-nav-link i{font-size:1.35rem}@media (min-width:768px){.back-nav{padding:.75rem 1.35rem 0}}.watch-container{padding:.85rem}.video-notes-section{background:var(--surface);border:1px solid var(--border);border-radius:12px;margin-top:1.25rem;padding:1rem}.watch-player-wrapper{aspect-ratio:16/9;background:#0f172a;border:1px solid #e2e8f0e6;border-radius:18px;width:100%;position:relative;overflow:hidden;box-shadow:0 18px 40px #0f172a1a}html.dark .watch-player-wrapper{border-color:#24324ae6}.watch-iframe{border:none;width:100%;height:100%;position:absolute;top:0;left:0}.watch-loading{background:#0f172a;place-items:center;display:grid;position:absolute;inset:0}html.dark .watch-loading{background:#000}.watch-error{background:#0f172a;flex-direction:column;justify-content:center;align-items:center;padding:2rem;display:flex;position:absolute;inset:0}.watch-actions{flex-wrap:wrap;gap:.65rem;margin-top:1rem;display:flex}.watch-actions .pill-btn{flex:1;justify-content:center;min-width:0}.related-lectures-list{flex-direction:column;gap:.65rem;display:flex}.related-lecture-card{-webkit-backdrop-filter:blur(12px);color:inherit;background:#fffffff0;border:1px solid #e2e8f0e6;border-radius:16px;gap:.75rem;padding:.65rem;text-decoration:none;transition:transform .15s;display:flex;box-shadow:0 8px 20px #0f172a0a}html.dark .related-lecture-card{background:#0f172af0;border-color:#24324ae6}.related-lecture-card:active{transform:scale(.98)}.related-lecture-thumb{aspect-ratio:16/9;background:#0f172a;border-radius:12px;flex-shrink:0;width:140px;position:relative;overflow:hidden}.related-lecture-thumb img{object-fit:cover;width:100%;height:100%}.related-lecture-body{flex-direction:column;flex:1;justify-content:center;gap:.25rem;min-width:0;display:flex}.related-lecture-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:.82rem;font-weight:700;line-height:1.35;display:-webkit-box;overflow:hidden}.related-lecture-meta{color:var(--text-muted);font-size:.72rem}.pdf-viewer-root{z-index:50;-webkit-user-select:none;user-select:none;background:#e2e8f0;flex-direction:column;display:flex;position:fixed;inset:0}html.dark .pdf-viewer-root{background:#0b1523}.pdf-viewer-top-bar{border-bottom:1px solid var(--border);z-index:60;background:#fffffff5;align-items:center;gap:.5rem;padding:.5rem .6rem;display:flex}html.dark .pdf-viewer-top-bar{background:#0f172af5}.pdf-viewer-back{border:1px solid var(--border);width:38px;height:38px;color:var(--text-main);cursor:pointer;background:#fffffff2;border-radius:999px;flex-shrink:0;place-items:center;font-size:1.2rem;display:grid}html.dark .pdf-viewer-back{background:#0f172af2}.pdf-viewer-page-info{text-align:center;color:var(--text-muted);flex:1;font-size:.78rem;font-weight:700}.pdf-viewer-scroll{flex-direction:column;flex:1;align-items:center;gap:.75rem;padding:1rem .5rem;display:flex;overflow-y:auto}.pdf-viewer-page-wrap{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 4px 16px #0f172a1f}.pdf-viewer-loading{color:var(--text-muted);flex-direction:column;justify-content:center;align-items:center;gap:.75rem;padding:4rem 2rem;display:flex}.pdf-viewer-page-loading{min-height:400px;color:var(--text-muted);justify-content:center;align-items:center;display:flex}.empty-state{text-align:center;color:var(--text-muted);padding:4rem 2rem;font-size:.92rem}.pdf-viewer-save-btn{color:#2563eb;cursor:pointer;white-space:nowrap;background:#2563eb14;border:1px solid #2563eb4d;border-radius:999px;flex-shrink:0;align-items:center;gap:.35rem;padding:.4rem .8rem;font-size:.72rem;font-weight:700;display:inline-flex}.pdf-viewer-save-btn.saved{color:#d97706;background:#f59e0b14;border-color:#f59e0b4d}html.dark .pdf-viewer-save-btn{background:#2563eb26}html.dark .pdf-viewer-save-btn.saved{background:#f59e0b26}.offline-saved-date{color:var(--text-muted);white-space:nowrap;margin-left:auto;font-size:.68rem}.offline-delete-btn{width:32px;height:32px;color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:999px;flex-shrink:0;justify-content:center;align-items:center;font-size:1.1rem;display:inline-flex}.offline-delete-btn:hover{color:#ef4444;background:#ef44441a}@media (min-width:768px){.watch-container{padding:.85rem 1.35rem}.related-lectures-list{grid-template-columns:repeat(2,1fr);display:grid}}.admin-login-page{flex-direction:column;align-items:center;max-width:400px;margin:0 auto;padding:2rem 1.5rem 3rem;display:flex}.admin-login-icon{background:linear-gradient(135deg, var(--primary), #1d4ed8);border-radius:20px;justify-content:center;align-items:center;width:64px;height:64px;margin-bottom:1.25rem;display:flex;box-shadow:0 12px 28px #2563eb40}.admin-login-icon i{color:#fff;font-size:2rem}.admin-login-title{text-align:center;margin-bottom:.35rem;font-size:1.5rem;font-weight:800}.admin-login-desc{color:var(--text-muted);text-align:center;margin-bottom:1.5rem;font-size:.9rem}.admin-login-card{border:1px solid var(--border);background:var(--bg-card);border-radius:20px;width:100%;padding:1.25rem}.admin-login-field{margin-bottom:1rem}.admin-login-label{text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);margin-bottom:.4rem;font-size:.75rem;font-weight:700;display:block}.admin-login-input{border:1px solid var(--border);background:var(--bg-app);width:100%;color:var(--text-main);border-radius:12px;outline:none;padding:.8rem 1rem;font-size:1rem;transition:border-color .2s,box-shadow .2s}.admin-login-input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1f}.admin-login-input::placeholder{color:var(--text-muted);opacity:.6}.admin-login-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca;border-radius:10px;align-items:center;gap:.4rem;margin-bottom:.75rem;padding:.6rem .8rem;font-size:.82rem;display:flex}html.dark .admin-login-error{color:#fca5a5;background:#7f1d1d40;border-color:#dc262659}.admin-login-error i{flex-shrink:0;font-size:1.1rem}.admin-login-btn{background:linear-gradient(135deg, var(--primary), #1d4ed8);color:#fff;cursor:pointer;border:none;border-radius:12px;justify-content:center;align-items:center;gap:.5rem;width:100%;padding:.75rem;font-size:.95rem;font-weight:700;transition:transform .15s,box-shadow .15s;display:flex;box-shadow:0 8px 20px #2563eb40}.admin-login-btn:active{transform:scale(.98)}.admin-dashboard{padding:0 1rem 2rem}.admin-header{justify-content:space-between;align-items:center;gap:.75rem;padding:1rem 0;display:flex}.admin-title{font-size:1.35rem;font-weight:800;line-height:1.2}.admin-subtitle{color:var(--text-muted);margin-top:.15rem;font-size:.82rem}.admin-header-actions{flex-shrink:0;gap:.4rem;display:flex}.admin-btn{cursor:pointer;white-space:nowrap;border:none;border-radius:12px;justify-content:center;align-items:center;gap:.35rem;font-weight:700;text-decoration:none;transition:all .15s;display:inline-flex}.admin-btn i{font-size:1.1rem}.admin-btn-primary{background:linear-gradient(135deg, var(--primary), #1d4ed8);color:#fff;padding:.55rem .9rem;font-size:.82rem;box-shadow:0 6px 16px #2563eb33}.admin-btn-primary:active{transform:scale(.97)}.admin-btn-outline{background:var(--bg-card);color:var(--text-main);border:1px solid var(--border);padding:.5rem .85rem;font-size:.8rem}.admin-btn-outline:active{background:var(--bg-app-2)}.admin-btn-ghost{color:var(--text-muted);border:1px solid var(--border);background:0 0;min-width:38px;min-height:38px;padding:.5rem;font-size:.8rem}.admin-btn-ghost:active{background:var(--bg-app-2)}.admin-btn-sm{padding:.4rem .7rem;font-size:.75rem}.admin-btn-active{background:var(--primary-light);color:var(--primary);border:1px solid var(--primary);padding:.4rem .7rem;font-size:.75rem}.admin-btn-danger{color:#ef4444;background:0 0;border:1px solid #fecaca;padding:.4rem .7rem;font-size:.75rem}html.dark .admin-btn-danger{border-color:#ef44444d}.admin-btn:disabled{opacity:.5;cursor:not-allowed}.admin-loading{color:var(--text-muted);flex-direction:column;align-items:center;gap:.6rem;padding:3rem 1rem;display:flex}.admin-loading i{font-size:2rem}.admin-loading p{font-size:.9rem}.admin-alert{border-radius:12px;align-items:flex-start;gap:.5rem;margin-bottom:.75rem;padding:.75rem .9rem;font-size:.82rem;line-height:1.4;display:flex}.admin-alert i{flex-shrink:0;margin-top:1px;font-size:1.15rem}.admin-alert-error{color:#b91c1c;background:#fef2f2;border:1px solid #fecaca}html.dark .admin-alert-error{color:#fca5a5;background:#7f1d1d33;border-color:#dc26264d}.admin-alert-info{background:var(--bg-app-2);border:1px solid var(--border);color:var(--text-muted)}.admin-toolbar{justify-content:space-between;align-items:center;margin-bottom:.65rem;display:flex}.admin-count{color:var(--text-muted);font-size:.82rem;font-weight:600}.admin-filters-bar{border:1px solid var(--border);background:var(--bg-card);border-radius:16px;flex-direction:column;gap:.5rem;margin-bottom:1rem;padding:.85rem;display:flex}.admin-filter-group{flex-direction:column;gap:.25rem;display:flex}.admin-filter-label{text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);font-size:.7rem;font-weight:700}.admin-filter-select{border:1px solid var(--border);background:var(--bg-app);width:100%;color:var(--text-main);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-position:right .75rem center;background-repeat:no-repeat;border-radius:10px;outline:none;padding:.6rem .8rem;font-size:.85rem;transition:border-color .2s}.admin-filter-select:focus{border-color:var(--primary)}.admin-filter-select:disabled{opacity:.4;cursor:not-allowed}.admin-empty{color:var(--text-muted);text-align:center;flex-direction:column;align-items:center;gap:.5rem;padding:3rem 1rem;display:flex}.admin-empty i{font-size:2.5rem}.admin-empty p{font-size:.88rem}.admin-groups{flex-direction:column;gap:1.25rem;display:flex}.admin-group-head{justify-content:space-between;align-items:center;margin-bottom:.5rem;display:flex}.admin-group-title{color:var(--text-main);align-items:center;gap:.35rem;font-size:.85rem;font-weight:700;display:flex}.admin-group-title i{color:var(--primary);font-size:1rem}.admin-group-count{color:var(--text-muted);background:var(--bg-app-2);border-radius:8px;padding:.2rem .55rem;font-size:.72rem;font-weight:600}.admin-notes-grid{flex-direction:column;gap:.5rem;display:flex}.admin-note-card{border:1px solid var(--border);background:var(--bg-card);border-radius:14px;transition:box-shadow .15s;overflow:hidden}.admin-note-linked{border-color:#2563eb40}.admin-note-top{align-items:flex-start;gap:.65rem;padding:.75rem .8rem .4rem;display:flex}.admin-note-icon{background:var(--bg-app-2);border-radius:10px;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;display:flex}.admin-note-icon i{color:var(--primary);font-size:1.15rem}.admin-note-icon .bx-pencil{color:#d97706}.admin-note-info{flex:1;min-width:0}.admin-note-name{word-break:break-word;color:var(--text-main);font-size:.88rem;font-weight:600;line-height:1.35}.admin-note-unit{color:var(--text-muted);margin-top:.15rem;font-size:.75rem;line-height:1.3}.admin-note-badges{flex-wrap:wrap;gap:.3rem;padding:.25rem .8rem .5rem;display:flex}.admin-badge{white-space:nowrap;border-radius:6px;align-items:center;gap:.2rem;padding:.2rem .55rem;font-size:.65rem;font-weight:700;display:inline-flex}.admin-badge-pdf{background:var(--primary-light);color:var(--primary)}.admin-badge-hw{color:#d97706;background:#f59e0b1a}html.dark .admin-badge-hw{background:#f59e0b26}.admin-badge-date{background:var(--bg-app-2);color:var(--text-muted)}.admin-badge-video{color:var(--primary);background:#2563eb14}.admin-badge-video i{font-size:.7rem}.admin-note-actions{gap:.35rem;padding:.35rem .8rem .75rem;display:flex}.admin-note-actions .admin-btn{flex:1}.admin-link-panel{border-top:1px solid var(--border);background:var(--bg-app);padding:.7rem .8rem}.admin-link-panel-title{color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.4rem;font-size:.72rem;font-weight:700}.admin-link-select{border:1px solid var(--border);background:var(--bg-card);width:100%;color:var(--text-main);appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");background-position:right .7rem center;background-repeat:no-repeat;border-radius:10px;outline:none;margin-bottom:.5rem;padding:.6rem .75rem;font-size:.8rem}.admin-link-btns{gap:.35rem;display:flex}.admin-link-btns .admin-btn{flex:1}@media (min-width:640px){.admin-filters-bar{flex-direction:row;gap:.65rem}.admin-filter-group{flex:1}.admin-notes-grid{grid-template-columns:repeat(2,1fr);gap:.65rem;display:grid}}@media (min-width:1024px){.admin-dashboard{max-width:960px;margin:0 auto}.admin-header{padding:1.25rem 0}.admin-title{font-size:1.6rem}.admin-notes-grid{grid-template-columns:repeat(3,1fr);gap:.75rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.pwa-steps{flex-direction:column;padding:.75rem 0;display:flex}.share-qr-wrap{background:var(--card-bg);-webkit-backdrop-filter:blur(16px);border:1px solid var(--card-border);width:100%;box-shadow:var(--card-shadow), var(--neuro-shadow-outer);border-radius:18px;justify-content:center;align-items:center;padding:1.5rem;display:flex}.share-qr-wrap img{border-radius:16px;width:auto;max-width:220px;height:auto}.pwa-step{align-items:flex-start;gap:1rem;padding:1rem;display:flex;position:relative}.pwa-step:not(:last-child):after{content:"";background:linear-gradient(to bottom, var(--primary), #2563eb26);width:2px;position:absolute;top:3rem;bottom:-1rem;left:1.5rem}.pwa-step-num{background:linear-gradient(135deg, var(--primary), #0ea5e9);color:#fff;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;width:2rem;height:2rem;font-size:.8rem;font-weight:800;display:inline-flex;box-shadow:0 4px 12px #2563eb4d}.pwa-step-content{flex:1;padding-top:.15rem}.pwa-step-content h4{color:var(--text);margin:0 0 .2rem;font-size:.88rem;font-weight:700}.pwa-step-content p{color:var(--text-muted);margin:0;font-size:.82rem;line-height:1.5}.pwa-step-content strong{color:var(--text);font-weight:700}.legal-content{padding:0 1.25rem 2rem}.legal-content h3{color:var(--text);margin:1.5rem 0 .5rem;font-size:1rem;font-weight:800}.legal-content p{color:var(--text-muted);margin:0 0 .75rem;font-size:.88rem;line-height:1.6}.legal-content ul{margin:0 0 .75rem;padding-left:1.25rem}.legal-content li{color:var(--text-muted);margin-bottom:.35rem;font-size:.85rem;line-height:1.6}.legal-content a{color:var(--primary);text-underline-offset:2px;text-decoration:underline}.legal-content a:hover{opacity:.8}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-tracking{syntax:"*";inherits:false}@property --tw-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-shadow-color{syntax:"*";inherits:false}@property --tw-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-inset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-shadow-color{syntax:"*";inherits:false}@property --tw-inset-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-ring-color{syntax:"*";inherits:false}@property --tw-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-inset-ring-color{syntax:"*";inherits:false}@property --tw-inset-ring-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-ring-inset{syntax:"*";inherits:false}@property --tw-ring-offset-width{syntax:"<length>";inherits:false;initial-value:0}@property --tw-ring-offset-color{syntax:"*";inherits:false;initial-value:#fff}@property --tw-ring-offset-shadow{syntax:"*";inherits:false;initial-value:0 0 #0000}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}@property --tw-translate-x{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-y{syntax:"*";inherits:false;initial-value:0}@property --tw-translate-z{syntax:"*";inherits:false;initial-value:0}