/* ===========================================================
   Khatwa — Educational Platform Front-End
   Official White & Blue Design System matching Khatwa Logo.
   Academic, modern, crisp, high-contrast & clean typography.
   =========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700;800;900&family=Source+Serif+4:opsz,wght@8..60,500;8..60,600;8..60,700&display=swap');

:root {
  /* Brand Blue Palette (Matched directly to the official Khatwa logo) */
  --primary-deep: #0B2545;
  --primary: #134074;
  --primary-rgb: 19, 64, 116;
  --primary-hover: #0B2545;
  --primary-light: #1D5D9B;
  --primary-bright: #2563EB;
  --primary-faint: #EEF4FA;
  --primary-border: #BCD3E8;

  /* Backward Compatibility Aliases */
  --gold: var(--primary);
  --gold-rgb: var(--primary-rgb);
  --gold-border: var(--primary-border);
  --gold-light: var(--primary-light);

  /* Surface & Background (Crisp Clean White & Soft Slate-White) */
  --bg: #F8FAFD;
  --bg-raised: #FFFFFF;
  --panel: #FFFFFF;
  --panel-alt: #F1F6FB;
  --line: rgba(19, 64, 116, 0.16);
  --line-soft: #E2EBF4;

  /* Typography / Inks */
  --ink: #0C2340;
  --ink-dim: #334E68;
  --ink-faint: #627D98;
  --ink-white: #FFFFFF;

  /* Status Colors */
  --ok: #0D9488;
  --warn: #D97706;
  --err: #DC2626;
  --info: #0284C7;

  /* Geometry & Typography */
  --radius: 8px;
  --radius-lg: 12px;
  --maxw: 1160px;
  --serif: 'Cairo', 'Source Serif 4', system-ui, sans-serif;
  --shadow-sm: 0 1px 3px rgba(11, 37, 69, 0.05);
  --shadow-md: 0 4px 14px rgba(11, 37, 69, 0.07);
  --shadow-lg: 0 10px 30px rgba(11, 37, 69, 0.12);
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Cairo',system-ui,sans-serif;
  background:var(--bg);
  color:var(--ink);
  direction:rtl;
  line-height:1.75;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;margin:0;padding:0;}
button{font-family:inherit;cursor:pointer;background:none;border:none;color:inherit;}
input,select,textarea{font-family:inherit;}
hr{border:none;border-top:1px solid var(--line-soft);margin:0;}

.container{max-width:var(--maxw);margin-inline:auto;padding-inline:28px;}
.container-narrow{max-width:760px;margin-inline:auto;padding-inline:28px;}

h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
p{margin:0;}

/* ---------- eyebrow / kicker ---------- */
.kicker{
  display:block;color:var(--primary);font-weight:800;font-size:.82rem;
  letter-spacing:.04em;margin-bottom:10px;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--radius);border:1px solid transparent;
  font-weight:700;font-size:.92rem;transition:all .18s ease;
  white-space:nowrap;cursor:pointer;
}
.btn-primary{
  background:var(--primary);
  color:#FFFFFF;
  box-shadow: 0 2px 8px rgba(19, 64, 116, 0.25);
}
.btn-primary:hover{
  background:var(--primary-hover);
  color:#FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(19, 64, 116, 0.32);
}
.btn-primary:active{transform: translateY(0);opacity:.9;}
.btn-line{
  background:#FFFFFF;
  border-color:var(--primary-border);
  color:var(--primary);
}
.btn-line:hover{
  background:var(--primary-faint);
  border-color:var(--primary);
  color:var(--primary);
}
.btn-text{background:transparent;color:var(--ink-dim);padding-inline:6px;}
.btn-text:hover{color:var(--primary);}
.btn-block{width:100%;}
.btn-sm{padding:7px 15px;font-size:.84rem;}
.btn:disabled{opacity:.45;cursor:not-allowed;}

/* ---------- Top Nav ---------- */
.nav{
  border-bottom:1px solid var(--line-soft);
  background:rgba(255, 255, 255, 0.96);
  backdrop-filter:blur(8px);
  position:sticky;
  top:0;
  z-index:40;
  box-shadow:var(--shadow-sm);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding-block:14px;gap:24px;}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:1.25rem;
  font-family:var(--serif);
  color:var(--ink);
  transition: opacity .15s ease;
}
.brand:hover{opacity:.9;}
.brand-logo{
  height:40px;
  width:auto;
  aspect-ratio:1/1;
  object-fit:contain;
  border-radius:6px;
  border:1px solid var(--line-soft);
  background:#FFFFFF;
  box-shadow:0 1px 3px rgba(11, 37, 69, 0.08);
}
.brand-mark{
  width:32px;
  height:32px;
  border:1.5px solid var(--primary-border);
  border-radius:6px;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--primary);
  font-weight:800;
  font-size:.85rem;
  background:var(--primary-faint);
}
.brand-text{
  font-weight:800;
  color:var(--primary-deep);
  letter-spacing:-.02em;
}
.nav-links{display:flex;align-items:center;gap:28px;}
.nav-links a{color:var(--ink-dim);font-weight:600;font-size:.92rem;transition:color .15s;}
.nav-links a:hover, .nav-links a.active{color:var(--primary);font-weight:700;}
.nav-cta{display:flex;gap:10px;align-items:center;}
.nav-toggle{display:none;border:1px solid var(--line-soft);color:var(--ink);border-radius:6px;padding:7px 10px;background:#FFFFFF;}

/* ---------- Hero ---------- */
.hero{
  padding:72px 0 56px;
  border-bottom:1px solid var(--line-soft);
  background:linear-gradient(180deg, #FFFFFF 0%, var(--bg) 100%);
}
.hero h1{font-family:var(--serif);font-size:2.7rem;line-height:1.35;font-weight:700;max-width:820px;color:var(--ink);}
.hero h1 em{font-style:normal;color:var(--primary);position:relative;}
.hero .lead{color:var(--ink-dim);font-size:1.1rem;max-width:620px;margin-top:20px;}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}
.hero-meta{display:flex;gap:40px;margin-top:52px;flex-wrap:wrap;border-top:1px solid var(--line-soft);padding-top:26px;}
.hero-meta div b{display:block;font-family:var(--serif);font-size:1.5rem;color:var(--primary);font-weight:700;}
.hero-meta div span{color:var(--ink-faint);font-size:.84rem;}

/* ---------- Editorial section rows ---------- */
.editorial-row{
  display:grid;grid-template-columns:260px 1fr;gap:48px;
  padding:52px 0;border-top:1px solid var(--line-soft);
}
.editorial-row:last-child{border-bottom:1px solid var(--line-soft);}
.editorial-row .label h2{font-family:var(--serif);font-size:1.5rem;font-weight:700;color:var(--ink);}
.editorial-row .label p{color:var(--ink-faint);font-size:.88rem;margin-top:10px;}
.editorial-row .body p{color:var(--ink-dim);font-size:1rem;max-width:640px;}
.editorial-row .body p + p{margin-top:14px;}

.step-list{display:flex;flex-direction:column;gap:22px;margin-top:6px;}
.step-list li{display:flex;gap:18px;align-items:baseline;}
.step-list .idx{font-family:var(--serif);color:var(--primary);font-size:1.2rem;font-weight:800;min-width:28px;}
.step-list b{display:block;font-size:1rem;margin-bottom:3px;color:var(--ink);}
.step-list span{color:var(--ink-dim);font-size:.9rem;}

.feature-rows{display:flex;flex-direction:column;}
.feature-row{display:flex;justify-content:space-between;gap:24px;padding:20px 0;border-top:1px solid var(--line-soft);}
.feature-row:first-child{border-top:none;}
.feature-row .ftitle{font-weight:700;font-size:1rem;min-width:220px;color:var(--ink);}
.feature-row .fdesc{color:var(--ink-dim);font-size:.92rem;}

.cta-band{border-top:1px solid var(--line-soft);padding:60px 0;text-align:center;background:#FFFFFF;}
.cta-band h2{font-family:var(--serif);font-size:2rem;font-weight:700;margin-bottom:16px;color:var(--ink);}
.cta-band p{color:var(--ink-dim);margin-bottom:28px;font-size:1.05rem;}

/* ---------- Footer ---------- */
footer{
  border-top:1px solid var(--line-soft);
  padding:44px 0 30px;
  background:#FFFFFF;
}
.footer-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px;align-items:flex-start;}
.footer-links{display:flex;gap:26px;flex-wrap:wrap;}
.footer-links a{color:var(--ink-dim);font-size:.88rem;transition:color .15s ease;}
.footer-links a:hover{color:var(--primary);}
.footer-note{color:var(--ink-faint);font-size:.8rem;margin-top:26px;}

/* ===========================================================
   Auth pages
   =========================================================== */
.auth-wrap{min-height:calc(100vh - 68px);display:flex;align-items:center;justify-content:center;padding:50px 20px;background:var(--bg);}
.auth-box{
  width:100%;max-width:420px;
  background:var(--bg-raised);
  border:1px solid var(--line-soft);
  border-radius:var(--radius-lg);
  padding:36px 32px;
  box-shadow:var(--shadow-md);
}
.auth-box.wide{max-width:580px;}
.auth-head{margin-bottom:28px;}
.auth-head .brand{margin-bottom:18px;}
.auth-head h1{font-family:var(--serif);font-size:1.6rem;font-weight:700;margin-bottom:6px;color:var(--ink);}
.auth-head p{color:var(--ink-faint);font-size:.88rem;}

.field{margin-bottom:18px;}
.field label{display:block;font-size:.85rem;color:var(--ink-dim);margin-bottom:7px;font-weight:700;}
.field .hint{display:block;color:var(--ink-faint);font-size:.78rem;margin-top:6px;}
.field .error{display:none;color:var(--err);font-size:.78rem;margin-top:6px;font-weight:600;}
.field.has-error input{border-color:var(--err);background:#FFF5F5;}
.field.has-error .error{display:block;}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border-radius:var(--radius);
  background:#FFFFFF;border:1.5px solid var(--line-soft);
  color:var(--ink);font-size:.92rem;outline:none;transition:border-color .15s, box-shadow .15s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(19, 64, 116, 0.12);
}
.field input::placeholder{color:var(--ink-faint);}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.pw-wrap{position:relative;}
.pw-wrap input{padding-inline-end:56px;}
.pw-toggle{position:absolute;inset-inline-end:12px;top:50%;transform:translateY(-50%);font-size:.78rem;color:var(--primary);font-weight:700;cursor:pointer;}
.form-links{display:flex;justify-content:space-between;font-size:.85rem;margin:-4px 0 20px;color:var(--ink-dim);}
.form-links a{color:var(--primary);font-weight:700;}
.form-links a:hover{text-decoration:underline;}
.auth-switch{text-align:center;font-size:.88rem;color:var(--ink-dim);margin-top:24px;}
.auth-switch a{color:var(--primary);font-weight:700;}
.alert{border:1px solid rgba(220, 38, 38, 0.25);border-inline-start:4px solid var(--err);background:#FEF2F2;padding:12px 14px;border-radius:var(--radius);font-size:.86rem;color:#991B1B;margin-bottom:20px;display:none;font-weight:600;}
.alert.show{display:block;}
.spinner{width:16px;height:16px;border-radius:50%;border:2px solid rgba(255,255,255,.35);border-top-color:#FFFFFF;display:inline-block;animation:spin .7s linear infinite;}
@keyframes spin{to{transform:rotate(360deg);}}

/* ===========================================================
   App shell (dashboard / subject / lesson etc.)
   =========================================================== */
.app-shell{display:grid;grid-template-columns:230px 1fr;min-height:calc(100vh - 68px);}
.sidebar{border-inline-end:1px solid var(--line-soft);padding:28px 20px;background:#FFFFFF;}
.side-group{margin-bottom:26px;}
.side-group h6{color:var(--ink-faint);font-size:.74rem;letter-spacing:.04em;margin:0 0 10px 4px;font-weight:800;}
.side-link{display:block;padding:9px 12px;border-radius:6px;color:var(--ink-dim);font-weight:600;font-size:.9rem;margin-bottom:3px;border-inline-start:3px solid transparent;transition:all .15s ease;}
.side-link:hover{color:var(--primary);background:var(--primary-faint);}
.side-link.active{color:var(--primary);font-weight:700;border-inline-start-color:var(--primary);background:var(--primary-faint);}

.main{padding:32px 36px;background:var(--bg);}
.page-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:8px;flex-wrap:wrap;gap:14px;}
.breadcrumb{color:var(--ink-faint);font-size:.82rem;margin-bottom:8px;}
.breadcrumb a{color:var(--ink-dim);transition:color .15s;}
.breadcrumb a:hover{color:var(--primary);}
.breadcrumb .sep{margin:0 6px;}
.page-head h1{font-family:var(--serif);font-size:1.6rem;font-weight:700;color:var(--ink);}
.page-sub{color:var(--ink-faint);font-size:.88rem;margin:6px 0 30px;}

.user-line{display:flex;align-items:center;gap:10px;}
.avatar{width:34px;height:34px;border-radius:50%;background:var(--primary-faint);border:1.5px solid var(--primary-border);display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--primary);font-size:.82rem;flex-shrink:0;}
.user-line .name{font-size:.88rem;font-weight:700;display:block;color:var(--ink);}
.user-line .role{font-size:.74rem;color:var(--ink-faint);}

.points-tag{
  background:var(--primary-faint);
  border:1.5px solid var(--primary-border);
  color:var(--primary);
  padding:7px 15px;
  border-radius:999px;
  font-weight:700;
  font-size:.86rem;
  box-shadow:var(--shadow-sm);
}

/* Key stats row */
.stat-row{
  display:flex;gap:0;
  border:1px solid var(--line-soft);
  border-radius:var(--radius);
  background:#FFFFFF;
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  margin-bottom:34px;
}
.stat-cell{flex:1;padding:22px 24px;border-inline-start:1px solid var(--line-soft);}
.stat-cell:first-child{border-inline-start:none;}
.stat-cell b{display:block;font-family:var(--serif);font-size:1.75rem;font-weight:700;color:var(--primary);}
.stat-cell span{color:var(--ink-faint);font-size:.82rem;}

/* Section title within main content */
.block{margin-bottom:40px;}
.block-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;}
.block-head h3{font-size:1.05rem;font-weight:700;color:var(--ink);}
.block-head a{font-size:.84rem;color:var(--primary);font-weight:700;}
.block-head a:hover{text-decoration:underline;}

/* Row list */
.row-list{
  border-top:1px solid var(--line-soft);
  background:#FFFFFF;
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  border:1px solid var(--line-soft);
  overflow:hidden;
}
.row-item{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px;border-bottom:1px solid var(--line-soft);transition:background .15s ease;}
.row-item:last-child{border-bottom:none;}
.row-item:hover{background:var(--primary-faint);}
.row-item .ri-main{display:flex;align-items:center;gap:14px;min-width:0;}
.row-item .ri-idx{font-family:var(--serif);color:var(--ink-faint);font-size:.92rem;min-width:22px;}
.row-item .ri-text b{display:block;font-size:.92rem;font-weight:700;color:var(--ink);}
.row-item .ri-text span{color:var(--ink-faint);font-size:.8rem;}
.row-item .ri-side{display:flex;align-items:center;gap:14px;flex-shrink:0;}

/* Progress bar */
.progress{height:6px;background:var(--line-soft);border-radius:3px;overflow:hidden;}
.progress > span{display:block;height:100%;background:var(--primary);border-radius:3px;transition:width .4s ease;}
.progress-label{display:flex;justify-content:space-between;font-size:.78rem;color:var(--ink-faint);margin-bottom:6px;font-weight:600;}

/* Status tag */
.tag{display:inline-block;padding:3px 10px;border-radius:4px;font-size:.76rem;font-weight:700;border:1px solid transparent;}
.tag-ok{color:#065F46;background:#ECFDF5;border-color:#A7F3D0;}
.tag-warn{color:#92400E;background:#FFFBEB;border-color:#FDE68A;}
.tag-err{color:#991B1B;background:#FEF2F2;border-color:#FECACA;}
.tag-locked{color:var(--ink-faint);background:#F1F5F9;border-color:var(--line-soft);}

/* Subject / course library */
.subject-row{
  display:grid;grid-template-columns:1.6fr .9fr .9fr auto;gap:20px;
  align-items:center;padding:20px 16px;border-bottom:1px solid var(--line-soft);
  background:#FFFFFF;transition:background .15s ease;
}
.subject-row:hover{background:var(--primary-faint);}
.subject-row:first-child{border-top:1px solid var(--line-soft);}
.subject-row h4{font-size:1rem;font-weight:700;margin-bottom:4px;color:var(--ink);}
.subject-row .meta{color:var(--ink-faint);font-size:.82rem;}
.subject-row .progress-wrap{max-width:180px;}

/* Lesson list within subject */
.lesson-row{
  display:flex;align-items:center;gap:16px;padding:16px;
  border-bottom:1px solid var(--line-soft);background:#FFFFFF;
  transition:background .15s ease;
}
.lesson-row:hover{background:var(--primary-faint);}
.lesson-row .lnum{
  width:30px;height:30px;border-radius:50%;
  border:1.5px solid var(--primary-border);
  display:flex;align-items:center;justify-content:center;
  font-size:.8rem;font-weight:800;color:var(--primary);
  background:var(--primary-faint);flex-shrink:0;
}
.lesson-row.locked .lnum{color:var(--ink-faint);border-color:var(--line-soft);background:#F1F5F9;}
.lesson-row.done .lnum{background:var(--primary);color:#FFFFFF;border-color:var(--primary);}
.lesson-row .ltext{flex:1;min-width:0;}
.lesson-row .ltext b{display:block;font-size:.92rem;color:var(--ink);}
.lesson-row .ltext span{color:var(--ink-faint);font-size:.8rem;}
.lesson-row.locked{opacity:.65;}

/* Lesson / video page */
.lesson-shell{display:grid;grid-template-columns:1fr 320px;min-height:calc(100vh - 68px);}
.lesson-main{padding:30px 34px;background:var(--bg);}
.video-frame{
  border:1px solid var(--line-soft);border-radius:var(--radius-lg);
  aspect-ratio:16/9;background:#0B192C;
  display:flex;align-items:center;justify-content:center;position:relative;margin-bottom:22px;
  box-shadow:var(--shadow-md);
  overflow:hidden;
}
.video-frame .play{
  width:64px;height:64px;border-radius:50%;
  background:rgba(255,255,255,0.15);backdrop-filter:blur(6px);
  border:2px solid #FFFFFF;display:flex;align-items:center;justify-content:center;
  transition:transform .2s ease, background .2s ease;cursor:pointer;
}
.video-frame .play:hover{transform:scale(1.08);background:var(--primary);}
.video-frame .play::before{content:"";border-inline-start:18px solid #FFFFFF;border-block:11px solid transparent;margin-inline-start:4px;}
.video-frame .badge{position:absolute;top:14px;inset-inline-end:14px;font-size:.76rem;color:#FFFFFF;background:rgba(11,25,44,0.7);backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,0.2);padding:5px 12px;border-radius:4px;font-weight:700;}
.lesson-info{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:22px;flex-wrap:wrap;gap:12px;}
.lesson-info h1{font-family:var(--serif);font-size:1.45rem;font-weight:700;margin-bottom:6px;color:var(--ink);}
.lesson-info .meta{color:var(--ink-faint);font-size:.86rem;}
.lesson-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:8px;}

.tab-row{display:flex;gap:0;border-bottom:1px solid var(--line-soft);margin-bottom:22px;}
.tab{padding:12px 0;margin-inline-end:26px;font-size:.9rem;font-weight:700;color:var(--ink-faint);border-bottom:2px solid transparent;cursor:pointer;}
.tab.active{color:var(--primary);border-color:var(--primary);}

.playlist{border-inline-start:1px solid var(--line-soft);padding:26px 20px;overflow-y:auto;background:#FFFFFF;}
.playlist h4{font-size:.88rem;color:var(--ink);margin-bottom:14px;letter-spacing:.02em;font-weight:800;}

/* Exam / homework */
.exam-shell{max-width:680px;margin:0 auto;padding:44px 24px;}
.exam-top{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px;}
.exam-top h1{font-family:var(--serif);font-size:1.4rem;font-weight:700;color:var(--ink);}
.exam-top span{color:var(--ink-faint);font-size:.84rem;}
.exam-progress{margin-bottom:38px;}
.q-text{font-size:1.1rem;font-weight:700;margin-bottom:26px;line-height:1.6;color:var(--ink);}
.opt{
  display:flex;align-items:center;gap:14px;padding:15px 18px;
  background:#FFFFFF;border:1.5px solid var(--line-soft);border-radius:var(--radius);
  margin-bottom:12px;cursor:pointer;transition:all .15s ease;
  box-shadow:var(--shadow-sm);
}
.opt:hover{border-color:var(--primary-light);background:var(--primary-faint);}
.opt.selected{border-color:var(--primary);background:var(--primary-faint);box-shadow:0 0 0 2px rgba(19, 64, 116, 0.15);}
.opt input{accent-color:var(--primary);}
.opt .letter{
  width:26px;height:26px;border-radius:50%;border:1.5px solid var(--primary-border);
  display:flex;align-items:center;justify-content:center;
  font-size:.78rem;font-weight:800;color:var(--primary);
  background:var(--primary-faint);flex-shrink:0;
}
.opt.selected .letter{background:var(--primary);color:#FFFFFF;border-color:var(--primary);}
.exam-nav{display:flex;justify-content:space-between;margin-top:32px;}

.result-hero{text-align:center;padding:50px 0;}
.result-hero .score{font-family:var(--serif);font-size:3.5rem;font-weight:800;color:var(--primary);}
.result-hero p{color:var(--ink-dim);margin-top:8px;}

/* Points / wallet */
.balance-block{
  display:flex;justify-content:space-between;align-items:flex-end;
  padding:28px 24px;border:1px solid var(--line-soft);border-radius:var(--radius);
  background:#FFFFFF;box-shadow:var(--shadow-sm);margin-bottom:34px;flex-wrap:wrap;gap:18px;
}
.balance-block .amount{font-family:var(--serif);font-size:2.5rem;font-weight:800;color:var(--primary);}
.balance-block .amount span{font-size:1rem;color:var(--ink-faint);font-weight:600;}

.upload-box{
  border:2px dashed var(--primary-border);border-radius:var(--radius);
  padding:28px;text-align:center;color:var(--ink-dim);font-size:.88rem;
  background:#FFFFFF;margin-bottom:12px;
}
.upload-box b{color:var(--primary);}

/* Tables */
table.plain{width:100%;border-collapse:collapse;font-size:.88rem;background:#FFFFFF;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid var(--line-soft);}
table.plain th{text-align:right;color:var(--ink);font-weight:800;padding:12px 14px;border-bottom:1px solid var(--line-soft);font-size:.8rem;background:var(--primary-faint);}
table.plain td{padding:14px 14px;border-bottom:1px solid var(--line-soft);color:var(--ink-dim);}
table.plain tr:last-child td{border-bottom:none;}
table.plain tr:hover td{background:var(--primary-faint);}

/* Notifications */
.notif-item{display:flex;gap:14px;padding:18px 16px;border-bottom:1px solid var(--line-soft);position:relative;background:#FFFFFF;transition:background .15s ease;}
.notif-item:last-child{border-bottom:none;}
.notif-item.unread{background:var(--primary-faint);}
.notif-item.unread::before{content:"";position:absolute;inset-inline-start:6px;top:24px;width:7px;height:7px;border-radius:50%;background:var(--primary);}
.notif-item .ntext b{display:block;font-size:.92rem;margin-bottom:3px;color:var(--ink);}
.notif-item .ntext span{color:var(--ink-dim);font-size:.82rem;}
.notif-item time{color:var(--ink-faint);font-size:.78rem;white-space:nowrap;}

/* FAQ / help accordion */
.faq-item{border-bottom:1px solid var(--line-soft);background:#FFFFFF;}
.faq-q{width:100%;text-align:right;display:flex;justify-content:space-between;align-items:center;padding:20px 4px;font-weight:700;font-size:.96rem;color:var(--ink);}
.faq-q .plus{color:var(--primary);font-size:1.2rem;transition:transform .2s;font-weight:600;}
.faq-item.open .plus{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;color:var(--ink-dim);font-size:.9rem;}
.faq-item.open .faq-a{max-height:240px;}
.faq-a-inner{padding:0 4px 20px;}

/* Empty / error states */
.empty-state{text-align:center;padding:70px 20px;border:1px solid var(--line-soft);border-radius:var(--radius);background:#FFFFFF;box-shadow:var(--shadow-sm);}
.empty-state .em-mark{font-family:var(--serif);font-size:1.8rem;color:var(--primary);margin-bottom:10px;}
.empty-state h3{font-size:1.1rem;margin-bottom:8px;color:var(--ink);}
.empty-state p{color:var(--ink-faint);font-size:.88rem;max-width:360px;margin:0 auto 20px;}

.state-code{font-family:var(--serif);font-size:5.5rem;color:var(--primary);font-weight:800;line-height:1;}

.skeleton{background:linear-gradient(90deg,#F1F5F9 0%,#E2E8F0 50%,#F1F5F9 100%);background-size:200% 100%;animation:shimmer 1.4s infinite;border-radius:var(--radius);}
@keyframes shimmer{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* Design system swatch page helpers */
.swatch{width:100%;height:56px;border-radius:var(--radius);border:1px solid var(--line-soft);}

/* ===========================================================
   Role Selector Pills (Signup / Auth)
   =========================================================== */
.role-picker {
  display: flex;
  gap: 8px;
  background: var(--bg);
  padding: 4px;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  margin-bottom: 22px;
}
.role-pill {
  flex: 1;
  text-align: center;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: .9rem;
  font-weight: 700;
  color: var(--ink-dim);
  cursor: pointer;
  transition: all .2s ease;
  border: 1px solid transparent;
}
.role-pill:hover {
  color: var(--primary);
}
.role-pill.active {
  background: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(19, 64, 116, 0.25);
}

/* ===========================================================
   Modals (Create Course & Add Lecture Studio)
   =========================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 37, 69, 0.55);
  backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal-backdrop.show {
  display: flex;
}
.modal-window {
  background: #FFFFFF;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalFadeIn .2s ease-out;
}
@keyframes modalFadeIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line-soft);
}
.modal-header h3 {
  font-family: var(--serif);
  font-size: 1.3rem;
  color: var(--ink);
}
.modal-close {
  color: var(--ink-faint);
  font-size: 1.4rem;
  line-height: 1;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: all .15s ease;
}
.modal-close:hover {
  color: var(--ink);
  background: var(--bg);
}
.modal-body {
  padding: 24px;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--line-soft);
  background: var(--bg);
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

/* ===========================================================
   Course Cards & Udemy/Coursera Badges
   =========================================================== */
.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
  margin-top: 20px;
}
.course-card {
  background: #FFFFFF;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.course-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.course-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}
.course-badge {
  font-size: .76rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  background: var(--primary-faint);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}
.course-card h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin-bottom: 8px;
  color: var(--ink);
}
.course-card p {
  color: var(--ink-dim);
  font-size: .88rem;
  line-height: 1.6;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.course-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
  margin-top: auto;
}
.teacher-info {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: var(--ink-faint);
}
.teacher-info b {
  color: var(--ink);
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 24px;
  background: var(--primary);
  border: 1px solid var(--primary-light);
  color: #FFFFFF;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 700;
  box-shadow: 0 10px 30px rgba(11, 37, 69, 0.3);
  z-index: 999;
  display: none;
  animation: slideUp .25s ease-out;
}
.toast.show { display: block; }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .editorial-row{grid-template-columns:1fr;gap:14px;}
  .app-shell{grid-template-columns:1fr;}
  .sidebar{display:none;}
  .lesson-shell{grid-template-columns:1fr;}
  .playlist{border-inline-start:none;border-top:1px solid var(--line-soft);}
  .subject-row{grid-template-columns:1fr;gap:10px;}
  .stat-row{flex-wrap:wrap;}
  .stat-cell{flex:1 1 50%;border-block-start:1px solid var(--line-soft);}
}
@media (max-width:640px){
  .nav-links{position:absolute;top:100%;inset-inline-start:0;right:0;left:0;background:#FFFFFF;border-bottom:1px solid var(--line-soft);flex-direction:column;align-items:flex-start;padding:16px 28px;gap:16px;display:none;box-shadow:var(--shadow-md);}
  .nav-links.open{display:flex;}
  .nav-toggle{display:inline-flex;}
  .hero h1{font-size:1.9rem;}
  .field-row{grid-template-columns:1fr;}
  .footer-row{flex-direction:column;}
  .balance-block{flex-direction:column;align-items:flex-start;}
  .lesson-info{flex-direction:column;}
  .catalog-grid{grid-template-columns:1fr;}
}