/* Courscale design system v2 — flat colour, no gradients, no inline styles (CSP).
   Motif: the stepped chevron of the logo. Each lesson is a step; the hero edge, course covers
   and progress meters all climb the same stair toward the inline-end of the reading direction. */

@font-face{font-family:"IBM Plex Sans Arabic";font-style:normal;font-weight:400;font-display:swap;src:url("./fonts/ibm-plex-sans-arabic-400.ttf") format("truetype")}
@font-face{font-family:"IBM Plex Sans Arabic";font-style:normal;font-weight:500;font-display:swap;src:url("./fonts/ibm-plex-sans-arabic-500.ttf") format("truetype")}
@font-face{font-family:"IBM Plex Sans Arabic";font-style:normal;font-weight:600;font-display:swap;src:url("./fonts/ibm-plex-sans-arabic-600.ttf") format("truetype")}
@font-face{font-family:"IBM Plex Sans Arabic";font-style:normal;font-weight:700;font-display:swap;src:url("./fonts/ibm-plex-sans-arabic-700.ttf") format("truetype")}
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:400;font-display:swap;src:url("./fonts/plus-jakarta-sans-400.ttf") format("truetype")}
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:500;font-display:swap;src:url("./fonts/plus-jakarta-sans-500.ttf") format("truetype")}
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:600;font-display:swap;src:url("./fonts/plus-jakarta-sans-600.ttf") format("truetype")}
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:700;font-display:swap;src:url("./fonts/plus-jakarta-sans-700.ttf") format("truetype")}
@font-face{font-family:"Plus Jakarta Sans";font-style:normal;font-weight:800;font-display:swap;src:url("./fonts/plus-jakarta-sans-800.ttf") format("truetype")}

:root{
 --navy-950:#0a1630;--navy-900:#10224a;--navy-800:#17306a;
 --ink:#14213d;--muted:#566175;--line:#dde3ee;--line-strong:#c5cfe0;
 --paper:#f4f6fb;--white:#fff;--sky:#eef3ff;--sky-2:#dfe8ff;
 --blue:#1f4fd1;--blue-700:#1a3fa8;--blue-100:#e6edfd;
 --teal:#167a6e;--teal-700:#0f5f55;--teal-100:#dcf3ef;
 --star:#d99a12;--danger:#b3263a;--danger-100:#fdecee;--ok-100:#e2f5ee;
 --r-sm:8px;--r-md:12px;--r-lg:18px;--r-xl:24px;
 --shadow-card:0 12px 30px rgba(16,34,74,.10);
 --shadow-float:0 24px 60px rgba(4,10,26,.38);
 --fs-hero:clamp(2.35rem,4.6vw,3.9rem);--fs-h1:clamp(1.9rem,3.2vw,2.6rem);--fs-h2:clamp(1.45rem,2.2vw,1.95rem);--fs-h3:1.15rem;
 --wrap:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:92px;-webkit-text-size-adjust:100%}
body{margin:0;color:var(--ink);background:var(--white);font:400 1rem/1.75 "Plus Jakarta Sans",Arial,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
html[lang=ar] body{font-family:"IBM Plex Sans Arabic",Tahoma,sans-serif;line-height:1.9;font-feature-settings:"kern"}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block;object-fit:cover}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.3;font-weight:800;color:var(--ink)}
html[lang=ar] h1,html[lang=ar] h2,html[lang=ar] h3,html[lang=ar] h4{font-weight:700;line-height:1.45;letter-spacing:0}
html:not([lang=ar]) h1,html:not([lang=ar]) h2{letter-spacing:-.025em}
h1{font-size:var(--fs-h1)}h2{font-size:var(--fs-h2)}h3{font-size:var(--fs-h3)}
h1,h2,h3{text-wrap:balance}
p{margin:0 0 1em}
.wrap{width:min(var(--wrap),calc(100% - 48px));margin-inline:auto}
.muted{color:var(--muted)}
.prose{white-space:pre-line;max-width:68ch;line-height:1.95}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:6px}

.skip{position:fixed;top:12px;inset-inline-start:12px;z-index:500;transform:translateY(-160%);visibility:hidden;background:#fff;padding:10px 16px;border:2px solid var(--blue);border-radius:var(--r-sm);font-weight:700}
.skip:focus{transform:none;visibility:visible}

/* ---------- direction-aware arrows (drawn, never typed: text arrows point the wrong way in Arabic) ---------- */
.arrow{display:inline-block;width:.5em;height:.5em;flex:none;margin-inline:.55em 0;border-inline-end:2px solid currentColor;border-block-end:2px solid currentColor;transform:rotate(-45deg)}
html[dir=rtl] .arrow-fwd{transform:rotate(45deg)}
.arrow-back{margin-inline:0 .55em;border-inline-end:0;border-block-end:2px solid currentColor;border-inline-start:2px solid currentColor;transform:rotate(45deg)}
html[dir=rtl] .arrow-back{transform:rotate(-45deg)}

/* ---------- buttons ---------- */
.button{display:inline-flex;align-items:center;justify-content:center;gap:.4em;min-height:48px;padding:12px 26px;border:1.5px solid var(--blue);border-radius:var(--r-md);background:var(--blue);color:#fff;font-weight:700;line-height:1.3;transition:background .15s,border-color .15s,color .15s}
.button:hover{background:var(--blue-700);border-color:var(--blue-700)}
.button.secondary{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.button.secondary:hover{border-color:var(--ink);background:var(--paper)}
.button.ghost{background:#fff;color:var(--ink);border-color:var(--line-strong)}
.button.ghost:hover{border-color:var(--blue);color:var(--blue)}
.button.small{min-height:40px;padding:8px 18px;font-size:.875rem}
.button[disabled]{opacity:.55;cursor:not-allowed}
.link{display:inline-flex;align-items:center;color:var(--blue);font-weight:700}
.link:hover{color:var(--blue-700);text-decoration:underline;text-underline-offset:4px}
.text-button{background:transparent;border:0;padding:8px;font-weight:700}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
.site-header .nav{display:grid;grid-template-columns:auto 1fr auto;grid-template-areas:"brand navigation actions";align-items:center;gap:32px;min-height:72px;padding-block:10px}
.brand{grid-area:brand;display:flex;align-items:center;gap:10px;font:800 1.45rem/1 "Plus Jakarta Sans",Arial,sans-serif;letter-spacing:-.04em;white-space:nowrap}
.brand img{width:32px;height:32px;object-fit:contain}
.main-nav{grid-area:navigation;display:flex;justify-content:center;gap:6px;font-size:.9375rem;font-weight:600}
.main-nav a{position:relative;padding:10px 16px;color:var(--muted);white-space:nowrap;transition:color .15s}
.main-nav a:hover{color:var(--ink)}
.main-nav a[aria-current=page]{color:var(--ink)}
.main-nav a[aria-current=page]::after{content:"";position:absolute;inset-inline:16px;bottom:2px;height:3px;border-radius:3px;background:var(--blue)}
.nav-end{grid-area:actions;display:flex;align-items:center;gap:8px}
.nav-end form{margin:0}
.header-icon{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;border:1px solid var(--line);border-radius:var(--r-md);background:#fff;transition:background .15s,border-color .15s}
.header-icon:hover{background:var(--paper);border-color:var(--line-strong)}
.header-icon img{width:20px;height:20px;object-fit:contain;pointer-events:none}
.nav-toggle{display:none;grid-area:toggle}
.language-select{position:relative}
.language-menu{position:absolute;top:calc(100% + 10px);inset-inline-end:0;min-width:170px;padding:6px;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-card);z-index:30}
.language-menu[hidden]{display:none}
.language-option{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:10px 12px;border:0;border-radius:var(--r-sm);background:#fff;font-size:.9375rem;text-align:start}
.language-option[lang=ar]{font-family:"IBM Plex Sans Arabic",sans-serif}
.language-option[lang=fr],.language-option[lang=en]{font-family:"Plus Jakarta Sans",Arial,sans-serif}
.language-option:hover,.language-option[aria-current=true]{background:var(--paper)}
.language-check{color:var(--teal);font-weight:800}
@media(max-width:900px){
 .site-header .nav{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);grid-template-areas:"toggle brand actions";gap:10px;min-height:64px;position:relative}
 .nav-toggle{display:inline-flex;justify-self:start}
 .brand{justify-self:center;font-size:1.3rem}
 .nav-end{justify-self:end}
 .main-nav{display:none;position:absolute;inset-inline:0;top:calc(100% + 8px);flex-direction:column;gap:2px;padding:8px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-card);z-index:25}
 .main-nav.is-open{display:flex}
 .main-nav a{padding:13px 16px;border-radius:var(--r-sm)}
 .main-nav a[aria-current=page]{background:var(--blue-100);color:var(--blue-700)}
 .main-nav a[aria-current=page]::after{display:none}
}
@media(max-width:480px){.wrap{width:calc(100% - 32px)}.header-icon{width:40px;height:40px}.nav-end{gap:6px}.brand{font-size:1.15rem}.brand img{width:28px;height:28px}}
@media(max-width:360px){.nav-end{gap:3px}.header-icon{width:36px}.brand{font-size:1rem;gap:6px}}

/* ---------- covers: flat colour + the stair glyph ---------- */
[data-tone]{--cover:#3f4bbf;--c-a:#ffffff1f;--c-b:#ffffff33;--c-c:#ffffff4d;--c-d:#ffffff73}
[data-tone="1"]{--cover:var(--teal-700)}
[data-tone="2"]{--cover:var(--blue)}
[data-tone="3"]{--cover:#b4561b}
[data-tone="4"]{--cover:#14566e}
.course-cover,.hero-featured-photo{position:relative;aspect-ratio:16/10;background:var(--cover,#e9eef7);overflow:hidden}
.course-cover img,.hero-featured-photo img{width:100%;height:100%;object-fit:cover}
.cover-placeholder,.hero-featured-neutral{position:absolute;inset:0;display:flex;align-items:flex-end;justify-content:flex-end;gap:3.5%;padding-inline-end:9%}
.cover-placeholder i,.hero-featured-neutral i{display:block;width:13%;border-radius:5px 5px 0 0;background:var(--c-a)}
.cover-placeholder i:nth-child(1),.hero-featured-neutral i:nth-child(1){height:26%;background:var(--c-a)}
.cover-placeholder i:nth-child(2),.hero-featured-neutral i:nth-child(2){height:44%;background:var(--c-b)}
.cover-placeholder i:nth-child(3),.hero-featured-neutral i:nth-child(3){height:64%;background:var(--c-c)}
.cover-placeholder i:nth-child(4),.hero-featured-neutral i:nth-child(4){height:86%;background:var(--c-d)}

/* ---------- hero: light, with an inline product illustration ---------- */
.hero{position:relative;overflow:hidden;background:var(--sky);color:var(--ink);border-bottom:1px solid var(--sky-2)}
.hero-inner{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:40px;align-items:center;padding-block:64px 64px}
.hero-inner.hero-empty{grid-template-columns:minmax(0,760px)}
.hero h1{color:var(--ink);font-size:var(--fs-hero);font-weight:800;line-height:1.18;margin:0 0 20px}
html[lang=ar] .hero h1{line-height:1.4}
.hero p{max-width:48ch;margin:0;color:#44506a;font-size:1.125rem}
.hero .actions{margin-top:32px}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px;margin:36px 0 0;padding:0;list-style:none;color:var(--muted);font-size:.875rem}
.hero-facts li{display:inline-flex;align-items:baseline;gap:8px;padding:9px 18px;border:1px solid var(--sky-2);border-radius:999px;background:#fff}
.hero-facts strong{color:var(--blue);font-size:1.25rem;font-weight:800;line-height:1}
.hero-art{display:block;width:100%;max-width:640px;justify-self:end;height:auto}
.hero-art .float-a{animation:float-y 6s ease-in-out infinite}
.hero-art .float-b{animation:float-y 7s ease-in-out -2s infinite}
@keyframes float-y{50%{transform:translateY(-7px)}}
@media(prefers-reduced-motion:reduce){.hero-art .float-a,.hero-art .float-b{animation:none}}
@keyframes stair-rise{from{transform:translateY(70%);opacity:0}to{transform:none;opacity:1}}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:34px}
.section-head h1,.section-head h2{margin:0}
.section-head p{margin:6px 0 0;color:var(--muted)}
.section-head>.link{white-space:nowrap}
.steps-section{background:var(--paper)}
.eyebrow{display:inline-block;font-size:.8125rem;font-weight:700;color:var(--teal)}
.eyebrow.chip{padding:4px 12px;border-radius:999px;background:var(--blue-100);color:var(--blue-700)}
.greeting{margin:0 0 4px;color:var(--teal);font-weight:700}
.intro-copy{max-width:62ch;font-size:1.125rem;color:var(--muted)}

/* ---------- course cards ---------- */
.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:26px}
.course-card{display:flex;flex-direction:column;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;transition:box-shadow .18s,border-color .18s,transform .18s}
a.course-card:hover{border-color:var(--line-strong);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.course-info{display:flex;flex-direction:column;flex:1;padding:20px 22px 22px}
.course-info .eyebrow{margin-bottom:8px}
.course-info h2,.course-info h3{margin:0 0 8px;font-size:1.1875rem;line-height:1.5}
.description-sm{margin:0 0 14px;color:var(--muted);font-size:.9375rem;line-height:1.7;display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden}
.course-teacher{margin:0 0 16px;color:var(--muted);font-size:.8125rem}
.course-meta{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);color:var(--muted);font-size:.8125rem}
.course-price{margin-top:12px;font-size:1.3125rem;font-weight:800;letter-spacing:-.02em}
html[lang=ar] .course-price{letter-spacing:0}
.student-courses .course-info h2{font-size:1.1875rem}
.student-courses .actions{margin-top:16px}
.course-progress-text{display:flex;justify-content:space-between;align-items:baseline;margin:14px 0 4px;color:var(--muted);font-size:.875rem}
.course-progress-text strong{color:var(--ink);font-size:1rem}
.step-meter{display:flex;align-items:flex-end;gap:4px;height:34px;margin:8px 0 12px}
.step-meter span{flex:1;background:var(--line);border-radius:3px 3px 0 0}
.step-meter .t1{height:26%}.step-meter .t2{height:44%}.step-meter .t3{height:62%}.step-meter .t4{height:80%}.step-meter .t5{height:100%}
.step-meter .on{background:var(--teal)}

/* ---------- how it works (a real sequence, so it is numbered) ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.stat-card{padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg)}
.stat-card strong{display:block;font-size:2rem;line-height:1.2}
.stat-card h3{margin:14px 0 6px}
.stat-card p{margin:0}
.steps-section .stat-card .eyebrow{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--blue);color:#fff;font-size:.9375rem;font-weight:800}

/* ---------- catalog filters ---------- */
.catalog-search{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:16px;align-items:end;margin-bottom:16px}
.catalog-filter{margin-bottom:28px}
.catalog-filter summary{display:inline-flex;align-items:center;gap:8px;cursor:pointer;list-style:none}
.catalog-filter summary::-webkit-details-marker{display:none}
.catalog-filter summary::after{content:"";width:8px;height:8px;border-inline-end:2px solid currentColor;border-block-end:2px solid currentColor;rotate:45deg;translate:0 -2px;transition:rotate .15s}
.catalog-filter[open] summary::after{rotate:225deg;translate:0 2px}
.filter-count{display:inline-grid;place-items:center;min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--blue);color:#fff;font-size:.75rem;font-weight:700}
.catalog-categories{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.pill{display:inline-flex;align-items:center;padding:8px 18px;border:1.5px solid var(--line);border-radius:999px;background:#fff;font-weight:600;font-size:.9375rem;transition:border-color .15s,background .15s}
.pill:hover{border-color:var(--line-strong)}
.pill.selected{background:var(--blue);border-color:var(--blue);color:#fff}
.pagination{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:36px;color:var(--muted);font-size:.9375rem}
.notice{padding:16px 20px;border-inline-start:4px solid var(--blue);border-radius:var(--r-sm);background:var(--blue-100)}

/* ---------- course detail ---------- */
.detail-hero{background:var(--sky);color:var(--ink);padding:30px 0 52px;border-bottom:1px solid var(--sky-2)}
.detail-hero .back-link{margin-bottom:22px}

.detail-title{max-width:22ch;margin:14px 0 14px;color:var(--ink);font-size:var(--fs-h1)}
html[lang=ar] .detail-title{max-width:28ch}
.detail-summary{max-width:60ch;margin:0 0 24px;color:#44506a;font-size:1.125rem}
.detail-facts{display:flex;flex-wrap:wrap;gap:10px 30px;margin:0;padding:0;list-style:none;color:var(--muted);font-size:.9375rem}
.detail-facts strong{color:var(--ink);font-weight:700}
.split{display:grid;grid-template-columns:minmax(0,1fr) 380px;gap:44px;align-items:start}
.detail-body{padding-top:44px}
.detail-media{position:relative;aspect-ratio:16/9;margin-bottom:28px;border-radius:var(--r-lg);overflow:hidden;background:var(--sky-2)}
.detail-media img{width:100%;height:100%}
.detail-video{margin-bottom:28px}
.detail-video h2{margin-bottom:14px}
.video-frame{position:relative;aspect-ratio:16/9;border-radius:var(--r-lg);overflow:hidden;background:var(--sky-2)}
.video-frame iframe{width:100%;height:100%;border:0}
.preview-empty{display:grid;place-content:center;height:100%;color:var(--muted);text-align:center}
html[dir=rtl] .instructor-profile{display:flex;align-items:center;gap:16px;margin:0 0 28px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-lg)}
.instructor-profile p{margin:2px 0 0;font-size:.9375rem}
.instructor-avatar{display:grid;place-items:center;flex:none;width:56px;height:56px;border-radius:50%;background:var(--teal-100);color:var(--teal-700);font-size:1.4rem;font-weight:800;overflow:hidden}
.instructor-avatar img{width:100%;height:100%}
.list-lessons{margin:0;padding:0;list-style:none}
.list-lessons li{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:14px 6px;border-bottom:1px solid var(--line)}
.list-lessons li:last-child{border-bottom:0}
.module-heading{margin-top:14px;padding:10px 14px!important;border:0!important;border-radius:var(--r-sm);background:var(--paper);color:var(--ink);font-weight:800}
.course-reviews h2,.detail-body h2{margin-top:1.4em}
.review-item{margin-bottom:14px}
.review-item p{margin:6px 0 0}
.enrollment-panel{position:sticky;top:92px;padding:28px;border-radius:var(--r-xl);box-shadow:var(--shadow-card)}
.enrollment-panel>h2{margin:4px 0 8px;font-size:2rem}
.enrollment-panel h3{margin-top:22px}
.legal-checkbox{display:flex;gap:10px;font-size:.8125rem;line-height:1.7;color:var(--muted)}
.legal-checkbox input{flex:none;width:18px;height:18px;margin-top:3px;accent-color:var(--blue)}

/* ---------- cards, forms, flashes ---------- */
.card{padding:26px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg)}
.card hr{margin:26px 0;border:0;border-top:1px solid var(--line)}
.stack{display:flex;flex-direction:column;gap:16px}
.actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px;font-size:.875rem;font-weight:600}
.field-full{grid-column:1/-1}
.field input,.field select,.field textarea{width:100%;min-height:48px;padding:11px 14px;border:1.5px solid var(--line-strong);border-radius:var(--r-md);background:#fff;font-weight:400;transition:border-color .15s,box-shadow .15s}
.field textarea{min-height:0;resize:vertical}
.field input:hover,.field select:hover,.field textarea:hover{border-color:#8fa0bf}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 4px #1f4fd129}
input[type=checkbox]{accent-color:var(--blue)}
.flash{margin-top:22px;padding:14px 18px;border:1px solid #b9e0d2;border-inline-start:4px solid var(--teal);border-radius:var(--r-md);background:var(--ok-100);color:var(--teal-700);font-weight:600}
.flash.error{border-color:#efbcc3;border-inline-start-color:var(--danger);background:var(--danger-100);color:var(--danger)}
.danger-text{color:var(--danger)}
.badge{display:inline-flex;align-items:center;padding:3px 10px;border-radius:999px;background:var(--teal-100);color:var(--teal-700);font-size:.75rem;font-weight:700}
.auth-card,.auth-card-compact{margin:24px auto 0;padding:38px 36px}
.auth-card{max-width:540px}.auth-card-compact{max-width:460px}
.auth-card::before,.auth-card-compact::before{content:"";display:block;width:46px;height:46px;margin-bottom:22px;background:url("./logo.svg") center/contain no-repeat}
.auth-card h1,.auth-card-compact h1{font-size:1.65rem}
.auth-card-compact .button,.auth-card .button{width:100%}
.page-950{max-width:950px}.page-860{max-width:860px}
.legal-section{padding:24px 0;border-top:1px solid var(--line)}
.legal-section h2{margin:0 0 8px;font-size:1.3rem}
.legal-section p{margin:0;color:var(--muted);line-height:1.95}
.mt-8{margin-top:8px}.mt-16{margin-top:16px}.mt-24{margin-top:24px}.mt-25{margin-top:25px}.mt-30{margin-top:30px}.mt-32{margin-top:32px}.mt-36{margin-top:36px}

/* ---------- student lesson view ---------- */
.back-link{margin-bottom:14px}
.student-layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:30px;align-items:start}
.student-sidebar{position:sticky;top:92px;max-height:calc(100vh - 116px);overflow:auto;padding:22px}
.student-sidebar h2{margin-top:0;font-size:1.15rem}
.student-lesson-item{gap:10px;padding:10px 12px!important;border-radius:var(--r-md);border:0!important}
.student-lesson-item a{flex:1}
.student-lesson-item.active{background:var(--blue-100);color:var(--blue-700);font-weight:700}
.lesson-done{position:relative;flex:none;width:20px;height:20px;border-radius:50%;background:var(--teal)}
.lesson-done::after{content:"";position:absolute;inset-inline-start:7px;top:4px;width:5px;height:9px;border:solid #fff;border-width:0 2px 2px 0;transform:rotate(45deg)}
.lesson-mark{color:var(--star);font-size:.9375rem}
.lesson-content h2{font-size:1.6rem}
.video-box{display:grid;place-content:center;aspect-ratio:16/9;margin-bottom:24px;border-radius:var(--r-lg);overflow:hidden;background:#050b1a;color:#b4c3e6;text-align:center}
.video-box>span{padding:24px}
.video-box iframe{width:100%;height:100%;border:0}
.video-box.shaka-box{display:block}
.shaka-course{position:relative;width:100%;height:100%;background:#000;overflow:hidden}
.shaka-course video{display:block;width:100%;height:100%;object-fit:contain}
.shaka-status{position:absolute;inset-inline:5%;top:40%;padding:16px;border-radius:var(--r-md);background:#0a1630ee;color:#fff;text-align:center;pointer-events:none}
.shaka-status[hidden]{display:none}
.lesson-actions{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;margin-top:24px;padding:20px 0;border-top:1px solid var(--line)}
.study-note-card{margin-top:24px}
.section-line{padding:12px 0;border-bottom:1px solid var(--line);font-weight:600}
.section-line:last-child{border-bottom:0}
.enrollment-row{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;border-top:1px solid var(--line)}

/* ---------- admin ---------- */
.admin-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:30px;align-items:start}
.side-nav{display:flex;flex-direction:column;gap:4px;position:sticky;top:92px}
.side-nav a{padding:11px 16px;border-radius:var(--r-md);font-size:.9375rem;font-weight:600;color:var(--muted)}
.side-nav a:hover{background:var(--paper);color:var(--ink)}
.side-nav a.active{background:var(--blue-100);color:var(--blue-700)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-lg)}
.data-table{width:100%;border-collapse:collapse;font-size:.9375rem}
.data-table th,.data-table td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:start;vertical-align:middle}
.data-table th{background:var(--paper);color:var(--muted);font-size:.8125rem;font-weight:700;white-space:nowrap}
.data-table tr:last-child td{border-bottom:0}
.data-table tbody tr:hover{background:#f9fafd}
.lead-filters{display:grid;grid-template-columns:minmax(200px,1fr) 210px auto;gap:14px;align-items:end;margin-bottom:20px}
.lead-detail-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:24px}
.detail-list>div{display:grid;grid-template-columns:150px 1fr;gap:12px;padding:12px 0;border-top:1px solid var(--line)}
.detail-list dt{color:var(--muted);font-weight:600}
.detail-list dd{margin:0;overflow-wrap:anywhere}
.activity-history{margin:0;padding-inline-start:20px}
.activity-history li{padding:14px 4px;border-bottom:1px solid var(--line);font-size:.9375rem}
.activity-history li:last-child{border-bottom:0}
.activity-history p{margin:8px 0;white-space:pre-wrap;overflow-wrap:anywhere}
.activity-history .actions{justify-content:space-between}

/* ---------- consent, footer ---------- */
.consent-bar{position:fixed;inset-block-end:20px;inset-inline-start:20px;z-index:100;max-width:480px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-float)}
.consent-bar[hidden]{display:none}
.consent-bar .wrap{width:auto}
.consent-inner{display:flex;flex-direction:column;gap:14px;padding:20px 22px}
.consent-inner p{margin:0;font-size:.875rem;line-height:1.7}
.consent-inner .actions{gap:8px}
.consent-inner .button{flex:1}
@media(max-width:560px){.consent-bar{inset-inline:12px;inset-block-end:12px;max-width:none}}
.footer{background:#f8fafc;border-top:1px solid var(--line);color:var(--muted);font-size:.875rem}
.footer .wrap{padding-block:48px 26px}
.footer-top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-bottom:30px}
.footer .brand{color:var(--ink)}
.footer-identity p{margin:12px 0 0;color:var(--muted)}
.footer-navigation{display:flex;gap:28px;font-weight:600;color:var(--ink)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:22px;border-top:1px solid var(--line);font-size:.8125rem}
.footer-copyright{display:flex;align-items:center;gap:14px}
.footer-country{padding-inline-start:14px;border-inline-start:1px solid var(--line-strong)}
.footer-legal{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.footer-legal button{padding:0;border:0;background:transparent;color:inherit;font-size:inherit}
.footer-navigation a:hover,.footer-legal a:hover,.footer-legal button:hover{color:var(--blue);text-decoration:underline;text-underline-offset:4px}

/* ---------- responsive ---------- */
@media(max-width:1080px){
 .course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .hero-inner{gap:32px}
 .split{grid-template-columns:minmax(0,1fr) 340px;gap:30px}
}
@media(max-width:860px){
 .hero-inner{grid-template-columns:minmax(0,1fr);padding-block:44px 48px}
 .hero-art{justify-self:center;max-width:460px}
 .split,.student-layout,.admin-layout,.lead-detail-grid{grid-template-columns:minmax(0,1fr)}
 .enrollment-panel,.student-sidebar,.side-nav{position:static;max-height:none}
 .side-nav{flex-direction:row;overflow-x:auto;padding-bottom:6px}
 .side-nav a{white-space:nowrap}
 .stat-grid{grid-template-columns:1fr}
 .section{padding:52px 0}
 .catalog-search,.lead-filters{grid-template-columns:1fr}
 .catalog-search .button,.lead-filters .button{width:100%}
}
@media(max-width:620px){
 .course-grid,.form-grid{grid-template-columns:1fr}
 .section-head{flex-wrap:wrap;align-items:flex-start}
 .footer-top,.footer-bottom{flex-direction:column;align-items:flex-start}
 .detail-list>div{grid-template-columns:1fr;gap:2px}
 .auth-card,.auth-card-compact{padding:28px 22px}
}
@media(prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{transition:none!important;animation:none!important}
}

/* Devices */
.devices-section{padding-block-start:0}
.device-card{max-width:720px}
.device-card h2{display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;margin-block-end:4px}
.device-count{font-size:.875rem;font-weight:500}
.device-list{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:0}
.device-list li{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-block:12px;border-block-start:1px solid var(--line,#e3e8f2)}
.device-list li p{margin:2px 0 0}

.admin-layout>*,.student-layout>*,.split>*{min-width:0}
.data-table select{min-height:40px;padding:6px 32px 6px 10px;border:1.5px solid var(--line-strong);border-radius:var(--r-sm);background:#fff}
.admin-layout h3{margin-block:28px 8px}
.admin-layout h3:first-child{margin-block-start:0}
.admin-layout form+h3{margin-block-start:32px}

/* ---------- home: categories and reasons ---------- */
.category-section{padding-block:64px 8px}
.category-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.category-tile{display:flex;flex-direction:column;gap:2px;padding:22px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff;transition:border-color .18s,box-shadow .18s,transform .18s}
.category-tile:hover{border-color:var(--blue);box-shadow:var(--shadow-card);transform:translateY(-2px)}
.category-tile strong{font-size:1.0625rem}
.category-tile .muted{font-size:.875rem}
.cat-icon,.why-icon{display:flex;align-items:flex-end;gap:4px;width:48px;height:48px;margin-bottom:14px;padding:11px;border-radius:14px;background:var(--cover)}
.cat-icon i,.why-icon i{display:block;flex:1;border-radius:2px 2px 0 0;background:#ffffffd9}
.cat-icon i:nth-child(1),.why-icon i:nth-child(1){height:38%;opacity:.55}
.cat-icon i:nth-child(2),.why-icon i:nth-child(2){height:68%;opacity:.78}
.cat-icon i:nth-child(3),.why-icon i:nth-child(3){height:100%}
.why-1{--cover:var(--blue)}.why-2{--cover:var(--teal)}.why-3{--cover:#b4561b}
.why-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.why-card{padding:28px;border:1px solid var(--line);border-radius:var(--r-lg);background:#fff}
.why-card h3{margin:0 0 8px}
.why-card p{margin:0}
.featured-section{padding-block:56px 20px}
.why-section{padding-block:56px 76px}
@media(max-width:860px){.category-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.why-grid{grid-template-columns:1fr}}