/* ═══════════════════════════════════════
   Pan-APA AI Workshop Design System
   Extracted from workshop_platform_v4.html
═══════════════════════════════════════ */

:root {
  --ink: #0d0d0d;
  --paper: #f5f0e8;
  --cream: #ede8dc;
  --amber: #c8860a;
  --amber-light: #f5a623;
  --amber-pale: #fdf3e0;
  --forest: #1a3a2a;
  --forest-mid: #2d5a40;
  --forest-light: #4a8c62;
  --forest-pale: #e8f3ec;
  --terracotta: #b84c2a;
  --terracotta-pale: #faeae4;
  --sky: #1a4a6b;
  --sky-pale: #e4eef5;
  --violet: #4a1a6b;
  --violet-pale: #ede4f5;
  --rule: rgba(13,13,13,0.1);
  --shadow: 0 2px 20px rgba(13,13,13,0.07);
  --shadow-deep: 0 8px 40px rgba(13,13,13,0.14);
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Literata',Georgia,'Noto Sans','Noto Serif Ethiopic','Noto Sans Arabic','Noto Sans Tifinagh',sans-serif;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.7;overflow-x:hidden;}

/* ─── HERO ─── */
.hero{background:var(--forest);color:var(--paper);padding:72px 48px 56px;position:relative;overflow:hidden;}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 75% 25%,rgba(200,134,10,.18) 0%,transparent 55%),radial-gradient(ellipse at 25% 75%,rgba(74,140,98,.2) 0%,transparent 50%);}
.hero-inner{max-width:960px;margin:0 auto;position:relative;z-index:1;}
.kicker{font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--amber-light);margin-bottom:18px;display:flex;align-items:center;gap:12px;}
.kicker::before{content:'';display:inline-block;width:28px;height:1px;background:var(--amber-light);}
.hero h1{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(2.2rem,5vw,3.8rem);line-height:1.1;letter-spacing:-.02em;margin-bottom:18px;}
.hero h1 span{color:var(--amber-light);}
.hero-sub{font-family:'Literata',serif;font-style:italic;font-size:1.1rem;color:rgba(245,240,232,.72);max-width:540px;margin-bottom:36px;line-height:1.65;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px;}

/* ─── NAV ─── */
.nav-strip{background:var(--cream);border-bottom:1px solid var(--rule);padding:0 48px;display:flex;align-items:stretch;position:sticky;top:0;z-index:100;box-shadow:0 1px 10px rgba(0,0,0,.05);overflow-x:auto;}
.nav-tab{font-family:'DM Mono',monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;padding:13px 20px;cursor:pointer;border-bottom:3px solid transparent;transition:all .2s;color:rgba(13,13,13,.72);white-space:nowrap;text-decoration:none;}
.nav-tab:hover{color:var(--ink);border-bottom-color:var(--forest-light);}
.nav-tab.active{color:var(--forest);border-bottom-color:var(--forest);font-weight:600;}
.nav-tab.ab{color:var(--amber);border-bottom-color:var(--amber);}
.nav-tab.du{color:var(--forest-mid);border-bottom-color:var(--forest-mid);}
.nav-tab.af{color:var(--sky);border-bottom-color:var(--sky);}

/* ─── NAV DROPDOWN (JS-controlled, position:fixed to escape overflow clipping) ─── */
.nav-dropdown{display:flex;align-items:stretch;}
.nav-dropdown-trigger{background:none;border:none;border-bottom:3px solid transparent;display:flex;align-items:center;gap:5px;font-family:'DM Mono',monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;padding:13px 20px;cursor:pointer;transition:all .2s;color:rgba(13,13,13,.72);white-space:nowrap;}
.nav-dropdown-trigger:hover{color:var(--ink);border-bottom-color:var(--forest-light);}
.nav-dropdown-trigger[aria-expanded="true"]{color:var(--forest);border-bottom-color:var(--forest);}
/* Menu panel — fixed so it escapes any overflow:hidden/auto ancestors */
.nav-dropdown-menu{position:fixed;background:white;border:1px solid var(--rule);border-radius:8px;box-shadow:0 8px 32px rgba(0,0,0,.12);min-width:220px;z-index:9999;padding:6px 0;}
.nav-dropdown-menu a{display:block;padding:10px 18px;font-family:'DM Mono',monospace;font-size:10.5px;letter-spacing:.04em;color:rgba(13,13,13,.72);text-decoration:none;white-space:nowrap;transition:all .15s;}
.nav-dropdown-menu a:hover{background:var(--forest-pale);color:var(--forest);}
.nav-dropdown-menu a.active{background:var(--forest-pale);color:var(--forest);font-weight:600;border-left:3px solid var(--forest);padding-left:15px;}
/* Hide on mobile (mobile menu handles modules) */
@media(max-width:640px){
  .nav-dropdown{display:none;}
  #nav-modules-menu{display:none !important;}
}
/* Login button — distinctive */
.nav-tab-login{background:var(--forest);color:white !important;border-radius:6px;margin:8px 0 8px 8px;padding:0 20px !important;display:flex;align-items:center;border-bottom:none !important;}
.nav-tab-login:hover{background:var(--forest-light);color:white !important;border-bottom-color:transparent !important;}
/* Logout — subtle terracotta tint */
.nav-tab-logout{color:var(--terracotta) !important;}
.nav-tab-logout:hover{border-bottom-color:var(--terracotta) !important;}

/* ─── GENERAL CONFIRM/ALERT MODAL ─── */
#gcm-backdrop{position:fixed;inset:0;z-index:9000;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;padding:20px;opacity:0;pointer-events:none;transition:opacity .18s ease;}
#gcm-backdrop.open{opacity:1;pointer-events:all;}
#gcm-modal{background:white;border-radius:14px;padding:28px 28px 22px;max-width:400px;width:100%;box-shadow:0 24px 64px rgba(0,0,0,.2);transform:translateY(12px) scale(.97);transition:transform .18s ease;}
#gcm-backdrop.open #gcm-modal{transform:translateY(0) scale(1);}
#gcm-icon{font-size:36px;margin-bottom:12px;text-align:center;}
#gcm-title{font-family:'Syne',sans-serif;font-weight:700;font-size:1.05rem;text-align:center;color:var(--ink);margin:0 0 8px;}
#gcm-message{font-size:.88rem;color:rgba(13,13,13,.6);line-height:1.6;text-align:center;margin:0;}
#gcm-detail{display:none;text-align:center;background:rgba(13,13,13,.05);border:1px solid rgba(13,13,13,.1);border-radius:8px;padding:8px 14px;font-family:'DM Mono',monospace;font-size:.82rem;color:var(--ink);margin:12px 0 0;word-break:break-word;}
.gcm-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:22px;}
#gcm-cancel{background:none;border:1px solid var(--rule);color:rgba(13,13,13,.6);border-radius:8px;padding:9px 20px;font-family:'DM Mono',monospace;font-size:11px;cursor:pointer;transition:background .15s;}
#gcm-cancel:hover{background:rgba(13,13,13,.05);}
#gcm-confirm{border:none;border-radius:8px;padding:9px 22px;font-family:'Syne',sans-serif;font-weight:700;font-size:.85rem;cursor:pointer;transition:background .15s;color:white;}
#gcm-confirm.gcm-danger{background:var(--terracotta);}
#gcm-confirm.gcm-danger:hover{background:#b5341e;}
#gcm-confirm.gcm-primary{background:var(--forest);}
#gcm-confirm.gcm-primary:hover{background:var(--forest-mid);}
#gcm-confirm.gcm-amber{background:var(--amber);}
#gcm-confirm.gcm-amber:hover{background:#9a6008;}

/* ─── MOBILE HAMBURGER MENU ─── */
.mobile-menu-btn{display:none;position:fixed;top:10px;right:14px;z-index:500;background:var(--cream);border:1px solid var(--rule);border-radius:6px;padding:6px 10px;font-size:18px;cursor:pointer;box-shadow:var(--shadow);}
.mobile-menu{display:none;position:fixed;top:0;right:-280px;width:280px;height:100vh;background:white;z-index:400;box-shadow:-4px 0 20px rgba(0,0,0,.15);padding:60px 0 20px;overflow-y:auto;transition:right .25s ease;}
.mobile-menu.open{right:0;}
.mobile-menu a{display:block;padding:12px 24px;font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.04em;color:rgba(13,13,13,.6);text-decoration:none;border-bottom:1px solid var(--rule);}
.mobile-menu a:hover,.mobile-menu a:active{background:var(--forest-pale);color:var(--forest);}
.mobile-menu-sub{padding-left:40px !important;font-size:10px !important;color:rgba(13,13,13,.45) !important;}
.mobile-menu-label{padding:16px 24px 6px;font-family:'Syne',sans-serif;font-weight:700;font-size:.75rem;color:rgba(13,13,13,.3);text-transform:uppercase;letter-spacing:.1em;}

@media(max-width:640px){
  .nav-strip{display:none;}
  .mobile-menu-btn{display:block;}
  .mobile-menu{display:block;}
}
@media(min-width:641px){
  .mobile-menu-btn{display:none !important;}
  .mobile-menu{display:none !important;}
}

/* ─── LAYOUT ─── */
.main{max-width:960px;margin:0 auto;padding:56px 48px 100px;}

/* ─── BUTTONS ─── */
.btn{font-family:'DM Mono',monospace;font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:12px 28px;border-radius:8px;border:none;cursor:pointer;transition:all .2s;text-decoration:none;display:inline-flex;align-items:center;gap:8px;}
.btn-primary{background:var(--amber);color:white;}
.btn-primary:hover{background:var(--amber-light);transform:translateY(-2px);}
.btn-secondary{background:transparent;border:1px solid var(--rule);color:var(--ink);}
.btn-secondary:hover{border-color:var(--ink);transform:translateY(-2px);}
.btn-forest{background:var(--forest);color:white;}
.btn-forest:hover{background:var(--forest-mid);transform:translateY(-2px);}
.btn-sm{padding:8px 18px;font-size:11px;}
.btn-lg{padding:14px 32px;font-size:13px;}

/* ─── CARDS ─── */
.card{background:white;border:1px solid var(--rule);border-radius:12px;padding:28px 30px;margin-bottom:20px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s;}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-deep);}
.card-title{font-family:'Syne',sans-serif;font-weight:700;font-size:1.1rem;margin-bottom:12px;display:flex;align-items:center;gap:10px;}
.card-subtitle{font-family:'DM Mono',monospace;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:rgba(13,13,13,.4);margin-bottom:8px;}

/* ─── BADGES & TAGS ─── */
.badge{font-family:'DM Mono',monospace;font-size:9.5px;letter-spacing:.12em;text-transform:uppercase;padding:5px 13px;border-radius:100px;}
.b-live{background:var(--forest-pale);color:var(--forest-mid);}
.b-post{background:var(--sky-pale);color:var(--sky);}
.b-capstone{background:var(--violet-pale);color:var(--violet);}
.b-pre{background:var(--amber-pale);color:var(--amber);}
.tags{display:flex;flex-wrap:wrap;gap:5px;margin:9px 0;}
.tag{font-family:'DM Mono',monospace;font-size:9.5px;letter-spacing:.06em;padding:3px 9px;border-radius:100px;background:var(--forest-pale);color:var(--forest-mid);}
.tag.a{background:var(--amber-pale);color:var(--amber);}
.tag.s{background:var(--sky-pale);color:var(--sky);}
.tag.v{background:var(--violet-pale);color:var(--violet);}

/* ─── PHASE HEADERS ─── */
.phase-hdr{display:flex;align-items:center;gap:18px;margin:64px 0 36px;padding-bottom:18px;border-bottom:2px solid var(--rule);}
.phase-n{font-family:'Syne',sans-serif;font-weight:800;font-size:3rem;line-height:1;opacity:.09;letter-spacing:-.04em;}
.phase-lbl{flex:1;}
.phase-lbl h2{font-family:'Syne',sans-serif;font-weight:700;font-size:1.45rem;letter-spacing:-.01em;}
.phase-lbl p{font-family:'DM Mono',monospace;font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;color:rgba(13,13,13,.4);margin-top:4px;}

/* ─── MODULE GRID ─── */
.module-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;margin:28px 0;}
.module-card{background:white;border:1px solid var(--rule);border-radius:12px;overflow:hidden;transition:transform .2s,box-shadow .2s;text-decoration:none;color:inherit;display:block;}
.module-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-deep);}
.module-card-header{padding:20px 20px 0;display:flex;align-items:flex-start;justify-content:space-between;}
.module-card-body{padding:14px 20px 20px;}
.module-card-title{font-family:'Syne',sans-serif;font-weight:700;font-size:1rem;margin-bottom:4px;}
.module-card-org{font-family:'DM Mono',monospace;font-size:9.5px;letter-spacing:.1em;text-transform:uppercase;color:rgba(13,13,13,.4);margin-bottom:8px;}
.module-card-desc{font-size:.85rem;color:rgba(13,13,13,.68);line-height:1.6;}
.module-card-footer{padding:0 20px 16px;display:flex;align-items:center;justify-content:space-between;}
.module-card-time{font-family:'DM Mono',monospace;font-size:10px;color:rgba(13,13,13,.4);}

/* ─── PROGRESS BAR ─── */
.progress-track{width:100%;height:6px;background:var(--cream);border-radius:3px;overflow:hidden;margin-top:8px;}
.progress-fill{height:100%;border-radius:3px;transition:width .4s ease;}
.progress-fill.forest{background:var(--forest-mid);}
.progress-fill.amber{background:var(--amber);}

/* ─── CODE EDITOR ─── */
.code-block{border:1px solid var(--rule);border-radius:10px;overflow:hidden;margin:16px 0;background:#1e1e2e;}
.code-header{background:#252535;padding:8px 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.06);}
.code-header-label{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.4);}
.code-actions{display:flex;gap:8px;}
.code-editor{min-height:120px;}
/* CodeMirror 5 styling */
.code-editor .CodeMirror{
  height:auto;
  min-height:120px;
  font-size:13px;
  font-family:'DM Mono',monospace;
  background:#1e1e2e;
  border:none;
}
.code-editor .CodeMirror-scroll{min-height:120px;}
.code-editor textarea{
  width:100%;min-height:180px;max-height:500px;
  font-family:'DM Mono',monospace;font-size:13px;line-height:1.6;
  background:#1e1e2e;color:#cdd6f4;border:none;padding:16px;
  resize:vertical;outline:none;tab-size:4;white-space:pre;overflow-wrap:normal;overflow-x:auto;
}
/* Hide textarea when CodeMirror takes over */
.code-editor .CodeMirror ~ textarea{display:none;}
.code-run-bar{display:flex;align-items:center;gap:12px;padding:12px 16px;background:var(--cream);border-top:1px solid var(--rule);}
.btn-run{background:var(--forest);color:white;font-family:'DM Mono',monospace;font-size:11px;letter-spacing:.1em;text-transform:uppercase;padding:8px 20px;border-radius:6px;border:none;cursor:pointer;transition:all .2s;display:flex;align-items:center;gap:6px;}
.btn-run:hover{background:var(--forest-mid);transform:translateY(-1px);}
.btn-run:disabled{opacity:.5;cursor:not-allowed;transform:none;}
.btn-reset{background:transparent;border:1px solid var(--rule);color:var(--ink);font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.08em;text-transform:uppercase;padding:7px 14px;border-radius:6px;cursor:pointer;transition:all .2s;}
.btn-reset:hover{border-color:var(--ink);}
.run-status{font-family:'DM Mono',monospace;font-size:10px;color:rgba(13,13,13,.4);margin-left:auto;}

/* ─── OUTPUT AREA ─── */
.output-area{background:white;border:1px solid var(--rule);border-radius:10px;margin:16px 0;overflow:hidden;}
.output-header{background:var(--cream);padding:8px 16px;border-bottom:1px solid var(--rule);display:flex;align-items:center;gap:8px;}
.output-header-label{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:rgba(13,13,13,.4);}
.output-indicator{width:8px;height:8px;border-radius:50%;background:#ccc;}
.output-indicator.success{background:var(--forest-light);}
.output-indicator.error{background:var(--terracotta);}
.output-indicator.running{background:var(--amber);animation:pulse 1s infinite;}
@keyframes pulse{0%,100%{opacity:1;}50%{opacity:.4;}}
.output-content{padding:16px;font-family:'DM Mono',monospace;font-size:13px;line-height:1.6;white-space:pre-wrap;min-height:60px;color:var(--ink);}
.output-content.error{color:var(--terracotta);}
.output-content img{max-width:100%;border-radius:8px;margin:8px 0;}
.output-content audio{width:100%;margin:8px 0;}
.output-content .map-frame{width:100%;height:400px;border:none;border-radius:8px;}
.output-elapsed{font-family:'DM Mono',monospace;font-size:9px;color:rgba(13,13,13,.3);padding:0 16px 8px;text-align:right;}

/* ─── STEP NAVIGATION ─── */
.step-nav{display:flex;align-items:center;justify-content:space-between;margin:32px 0;padding-top:24px;border-top:1px solid var(--rule);}
.step-indicator{font-family:'DM Mono',monospace;font-size:11px;color:rgba(13,13,13,.4);}
.step-dots{display:flex;gap:6px;}
.step-dot{width:8px;height:8px;border-radius:50%;background:var(--rule);}
.step-dot.active{background:var(--forest);}
.step-dot.completed{background:var(--amber);}

/* ─── NOTEBOOK BRIDGE ─── */
.notebook-bridge{background:linear-gradient(135deg,var(--forest-pale),var(--sky-pale));border:1px solid var(--rule);border-radius:12px;padding:24px 28px;margin:32px 0;}
.notebook-bridge h3{font-family:'Syne',sans-serif;font-weight:700;font-size:1rem;margin-bottom:8px;display:flex;align-items:center;gap:8px;}
.notebook-bridge p{font-size:.85rem;color:rgba(13,13,13,.68);line-height:1.6;margin-bottom:16px;}
.notebook-bridge-actions{display:flex;gap:10px;flex-wrap:wrap;}
.notebook-bridge-note{font-family:'DM Mono',monospace;font-size:10px;color:rgba(13,13,13,.4);margin-top:12px;}

/* ─── EVALUATION ─── */
.eval-wrap{background:white;border:1px solid var(--rule);border-radius:16px;overflow:hidden;box-shadow:var(--shadow);}
.eval-hdr{padding:24px 30px;border-bottom:1px solid var(--rule);display:flex;align-items:flex-start;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.eval-hdr-text h3{font-family:'Syne',sans-serif;font-weight:700;font-size:1.1rem;}
.eval-hdr-text p{font-size:.83rem;color:rgba(13,13,13,.52);margin-top:4px;max-width:480px;line-height:1.55;}
.eval-body{padding:30px;}
.construct-section{margin-bottom:36px;}
.construct-hdr{display:flex;align-items:center;gap:12px;margin-bottom:18px;padding-bottom:10px;border-bottom:1px dashed var(--rule);}
.construct-num{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.15em;text-transform:uppercase;padding:3px 10px;border-radius:100px;}
.cn-cog{background:var(--sky-pale);color:var(--sky);}
.cn-aff{background:var(--amber-pale);color:var(--amber);}
.cn-beh{background:var(--forest-pale);color:var(--forest-mid);}
.cn-eth{background:var(--violet-pale);color:var(--violet);}
.construct-name{font-family:'Syne',sans-serif;font-weight:700;font-size:1rem;}
.q-item{margin-bottom:22px;}
.q-stem{font-size:.92rem;line-height:1.6;margin-bottom:12px;}
.q-num{font-family:'DM Mono',monospace;font-size:10.5px;color:var(--amber);margin-right:7px;font-weight:500;}
.mcq-opts{display:flex;flex-direction:column;gap:7px;}
.mcq-opt{display:flex;align-items:flex-start;gap:11px;padding:11px 14px;border:1px solid var(--rule);border-radius:8px;cursor:pointer;transition:all .15s;font-size:.86rem;line-height:1.5;}
.mcq-opt:hover{border-color:var(--amber);background:var(--amber-pale);}
.mcq-opt.sel{border-color:var(--amber);background:var(--amber-pale);}
.likert-row{display:flex;gap:6px;flex-wrap:wrap;}
.likert-btn{font-family:'DM Mono',monospace;font-size:11px;padding:10px 18px;border:1px solid var(--rule);border-radius:8px;cursor:pointer;transition:all .15s;background:white;min-width:48px;text-align:center;}
.likert-btn:hover{border-color:var(--amber);background:var(--amber-pale);}
.likert-btn.sel{border-color:var(--amber);background:var(--amber);color:white;}

/* ─── RESULTS ─── */
.results-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin:24px 0;}
.result-card{background:white;border:1px solid var(--rule);border-radius:10px;padding:20px;text-align:center;}
.result-label{font-family:'DM Mono',monospace;font-size:10px;letter-spacing:.1em;text-transform:uppercase;color:rgba(13,13,13,.4);margin-bottom:8px;}
.result-value{font-family:'Syne',sans-serif;font-weight:800;font-size:2rem;color:var(--forest);}
.result-delta{font-family:'DM Mono',monospace;font-size:11px;margin-top:4px;}
.result-delta.positive{color:var(--forest-light);}
.result-delta.negative{color:var(--terracotta);}

/* ─── CERTIFICATE ─── */
.cert-preview{background:white;border:1px solid var(--rule);border-radius:12px;padding:32px;text-align:center;box-shadow:var(--shadow);}
.cert-canvas{max-width:100%;border-radius:8px;box-shadow:var(--shadow-deep);}

/* ─── JOIN FORM ─── */
.join-form{max-width:440px;margin:0 auto;}
.form-group{margin-bottom:20px;}
.form-label{font-family:'DM Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:rgba(13,13,13,.5);display:block;margin-bottom:6px;}
.form-input{width:100%;font-family:'Literata',serif;font-size:15px;padding:12px 16px;border:1px solid var(--rule);border-radius:8px;background:white;transition:border-color .2s;}
.form-input:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-pale);}
.form-note{font-family:'DM Mono',monospace;font-size:10px;color:rgba(13,13,13,.35);margin-top:4px;}

/* ─── RESPONSIVE — TABLET ─── */
@media(max-width:900px){
  .hero{padding:40px 24px 36px;}
  .main{padding:32px 24px 80px;}
  .nav-strip{padding:0 12px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;}
  .nav-strip::-webkit-scrollbar{display:none;}
}

/* ─── RESPONSIVE — LESSON MOBILE ─── */
@media(max-width:640px){
  .main{overflow:hidden !important;max-width:100vw !important;}
  .lesson-content-block{overflow:hidden !important;max-width:100% !important;}
  .lesson-content-block .markdown-content{overflow-x:auto !important;max-width:100% !important;}
  .lesson-hero{padding:24px 14px 20px !important;}
  .lesson-hero h1{font-size:1.2rem !important;}
  .lesson-hero .sub{font-size:.82rem !important;}
  .lesson-hero .meta{gap:8px !important;}
  .lesson-hero .meta span{font-size:9px !important;}
  .lesson-progress{padding:5px 12px !important;top:0 !important;}
  .lesson-layout{grid-template-columns:1fr !important;}
  .lesson-sidebar{display:none !important;}
  .lesson-objectives{padding:12px 14px !important;margin-bottom:20px !important;}
  .lesson-objectives ul{font-size:.8rem !important;line-height:1.7 !important;}
  .lesson-content-block{padding:12px 14px !important;}
  .lesson-content-block .markdown-content{font-size:.85rem !important;line-height:1.7 !important;}
  .lesson-content-block .markdown-content h3{font-size:.9rem !important;}
  .lesson-content-block .markdown-content table{font-size:.75rem !important;display:block !important;overflow-x:auto !important;}
  .lesson-content-block .markdown-content td,.lesson-content-block .markdown-content th{padding:5px 7px !important;}
  .activity-block{padding:12px 14px !important;}
  .section-header{gap:8px !important;}
  .section-number{width:26px !important;height:26px !important;font-size:11px !important;}
  .section-title{font-size:.88rem !important;}
  .section-check{width:20px !important;height:20px !important;}
  .listen-btn{width:100% !important;justify-content:center !important;}
  .tts-player audio{max-width:100% !important;}
  .lesson-nav{flex-direction:column !important;gap:10px !important;}
  .lesson-nav .btn{width:100% !important;justify-content:center !important;}
  .lesson-section{margin-bottom:28px !important;}
  .external-tools-grid{grid-template-columns:1fr !important;}
  .try-btn{width:100% !important;justify-content:center !important;}
}

/* ─── RESPONSIVE — MOBILE ─── */
@media(max-width:640px){
  .hero{padding:32px 16px 28px !important;}
  .hero h1{font-size:1.5rem;}
  .hero-sub{font-size:.9rem;margin-bottom:20px;}
  .hero-actions{flex-direction:column;}
  .hero-actions .btn{width:100%;justify-content:center;}

  .nav-strip{padding:0 4px;gap:0;}
  .nav-tab{padding:10px 10px;font-size:9px;letter-spacing:.02em;}

  .main{padding:20px 14px 60px;}

  .module-grid{grid-template-columns:1fr;}

  .card{padding:18px 16px;margin-bottom:12px;}
  .card:hover{transform:none;box-shadow:var(--shadow);}
  .card-title{font-size:.95rem;}

  .phase-hdr{margin:32px 0 20px;gap:10px;}
  .phase-n{font-size:1.8rem;}
  .phase-lbl h2{font-size:1.1rem;}
  .phase-lbl p{font-size:9px;}

  .btn{padding:10px 18px;font-size:10.5px;width:100%;justify-content:center;}
  .btn-sm{padding:8px 14px;font-size:10px;}
  .btn-lg{padding:12px 22px;font-size:11px;}

  .tags{gap:4px;}
  .tag{font-size:8.5px;padding:2px 7px;}
  .badge{font-size:8.5px;padding:4px 10px;}

  .step-nav{flex-direction:column;gap:10px;}
  .step-nav .btn{width:100%;justify-content:center;}

  .code-editor{min-height:80px;}
  .notebook-bridge-actions{flex-direction:column;}

  .eval-body{padding:16px 14px;}
  .eval-hdr{padding:16px 14px;}
  .eval-hdr-text h3{font-size:.95rem;}
  .mcq-opt{padding:9px 12px;font-size:.84rem;}
  .likert-row{gap:4px;flex-wrap:wrap;}
  .likert-btn{padding:8px 10px;font-size:10px;min-width:36px;flex:1;}

  .results-grid{grid-template-columns:1fr 1fr;}
  .cert-preview{padding:12px;}
  .cert-canvas{height:auto !important;}

  .join-form{padding:0;}
  .form-input{font-size:14px;padding:10px 14px;}
  .form-group{margin-bottom:16px;}

  footer{padding:20px 16px !important;}
  footer img{height:80px !important;}
  footer p{font-size:9px !important;}
}