/* ============================================================
   Surfing the Frequencies — app.css
   Design system: bioluminescent deep ocean meets ancient Greek agora
   Dark-first · responsive · progressive enhancement ready
   
   SECTIONS:
   1. CSS Variables (design tokens)
   2. Base / Reset
   3. Typography
   4. Cards
   5. Buttons
   6. Pills / Badges
   7. Navigation
   8. Forms / Auth
   9. Session / Academy
   10. Onboarding
   11. Dashboard / Agora
   12. Animations
   13. Responsive breakpoints
============================================================ */

/* ═══════════════════════════════════════════════════
   SURFING THE FREQUENCIES
   Aesthetic: bioluminescent deep ocean meets ancient
   Greek agora. Dark, alive, purposeful.
   Font: Syne (display) + DM Sans (body)
═══════════════════════════════════════════════════ */
:root {
  --bg:    #080C14;
  --bg2:   #0D1220;
  --bg3:   #131929;
  --bg4:   #1A2238;
  --bg5:   #212D47;
  --border:  rgba(255,255,255,0.06);
  --border2: rgba(255,255,255,0.12);

  --wave:   #00E5C8;   /* bioluminescent teal */
  --wave2:  #00B8A2;
  --wave-dim: rgba(0,229,200,0.10);
  --deep:   #3D7BFF;   /* deep ocean blue */
  --deep-dim: rgba(61,123,255,0.12);
  --coral:  #FF6B6B;
  --coral-dim: rgba(255,107,107,0.12);
  --gold:   #FFD166;
  --gold-dim: rgba(255,209,102,0.12);
  --foam:   rgba(255,255,255,0.85);

  --text:  #E8EDF8;
  --text2: #8B96B8;
  --text3: #4A5478;

  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  --r:    12px;
  --r-sm: 7px;
  --r-lg: 20px;

  --glow-wave: 0 0 30px rgba(0,229,200,0.2);
  --glow-deep: 0 0 30px rgba(61,123,255,0.2);
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:14px;
  line-height:1.5;
  min-height:100vh;
  overflow-x:hidden;
}

/* ── Ambient background ──────────────────────────── */
body::before{
  content:'';
  position:fixed;
  inset:0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 10%, rgba(0,229,200,0.04) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 80%, rgba(61,123,255,0.05) 0%, transparent 70%);
  pointer-events:none;
  z-index:0;
}

/* ── Scrollbar ───────────────────────────────────── */
::-webkit-scrollbar{width:3px}
::-webkit-scrollbar-thumb{background:var(--bg5);border-radius:2px}

/* ── Typography ──────────────────────────────────── */
h1{font-family:var(--font-display);font-size:26px;font-weight:800;letter-spacing:-0.5px}
h2{font-family:var(--font-display);font-size:20px;font-weight:700}
h3{font-family:var(--font-display);font-size:15px;font-weight:600}
h4{font-size:11px;font-weight:500;color:var(--text2);text-transform:uppercase;letter-spacing:1px}
p{color:var(--text2);line-height:1.65}

/* ── Cards ───────────────────────────────────────── */
.card{
  background:var(--bg2);
  border:1px solid var(--border);
  border-radius:var(--r);
  padding:18px 20px;
  position:relative;
  z-index:1;
  transition:border-color .2s;
}
.card:hover{border-color:var(--border2)}
.card-wave{box-shadow:var(--glow-wave);border-color:rgba(0,229,200,0.2)}
.card-deep{box-shadow:var(--glow-deep);border-color:rgba(61,123,255,0.2)}

/* ── Buttons ─────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:10px 20px;border-radius:var(--r-sm);
  font-family:var(--font-display);font-size:13px;font-weight:600;
  cursor:pointer;border:none;transition:all .18s;letter-spacing:0.2px;
}
.btn-wave{
  background:var(--wave);color:#031210;
  box-shadow:0 0 20px rgba(0,229,200,0.35);
}
.btn-wave:hover{background:#1FFFD8;box-shadow:0 0 36px rgba(0,229,200,0.55);transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text2);border:1px solid var(--border2)}
.btn-ghost:hover{background:var(--bg3);color:var(--text)}
.btn-deep{background:var(--deep);color:#fff;box-shadow:0 0 20px rgba(61,123,255,0.3)}
.btn-deep:hover{filter:brightness(1.15);transform:translateY(-1px)}
.btn-sm{padding:6px 13px;font-size:12px}
.btn-lg{padding:13px 28px;font-size:15px;border-radius:var(--r)}
.btn-full{width:100%}
.btn:disabled{opacity:.4;cursor:not-allowed;transform:none}

/* ── Pills ───────────────────────────────────────── */
.pill{display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border-radius:20px;font-size:11px;font-weight:500}
.pw{background:var(--wave-dim);color:var(--wave)}
.pd{background:var(--deep-dim);color:var(--deep)}
.pg{background:rgba(100,200,100,0.12);color:#6DC86D}
.pa{background:var(--gold-dim);color:var(--gold)}
.pc{background:var(--coral-dim);color:var(--coral)}
.pgr{background:var(--bg4);color:var(--text2)}

/* ── Bars ────────────────────────────────────────── */
.bar-bg{background:var(--bg5);border-radius:4px;overflow:hidden}
.bar-f{height:100%;border-radius:4px;transition:width .7s cubic-bezier(.4,0,.2,1)}

/* ── Logo ────────────────────────────────────────── */
.logo{
  font-family:var(--font-display);
  font-size:16px;font-weight:800;
  background:linear-gradient(135deg,var(--wave),var(--deep));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  white-space:nowrap;letter-spacing:-0.3px;
}

/* ── Nav ─────────────────────────────────────────── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  height:56px;
  background:rgba(8,12,20,0.88);
  backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
  display:flex;align-items:center;
  padding:0 22px;gap:18px;
}
.nav-tabs{display:flex;gap:2px;flex:1}
.nav-tab{
  padding:6px 13px;border-radius:var(--r-sm);
  font-family:var(--font-display);font-size:12px;font-weight:600;
  cursor:pointer;color:var(--text3);border:none;background:transparent;
  transition:all .15s;letter-spacing:0.2px;
}
.nav-tab:hover{color:var(--text);background:var(--bg3)}
.nav-tab.on{color:var(--wave);background:var(--wave-dim)}
.nav-av{
  width:34px;height:34px;border-radius:50%;
  background:linear-gradient(135deg,var(--wave),var(--deep));
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-display);font-size:13px;font-weight:700;
  cursor:pointer;color:#031210;
  border:2px solid rgba(0,229,200,0.3);
  transition:box-shadow .2s;flex-shrink:0;
}
.nav-av:hover{box-shadow:var(--glow-wave)}

/* ── Page ────────────────────────────────────────── */
.page{padding:72px 22px 40px;max-width:1160px;margin:0 auto;position:relative;z-index:1}

/* ── Auth pages ──────────────────────────────────── */
.auth-wrap{
  min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:20px;position:relative;z-index:1;
}
.auth-card{
  width:100%;max-width:420px;
  background:var(--bg2);
  border:1px solid var(--border2);
  border-radius:var(--r-lg);
  padding:36px 32px;
  box-shadow:0 0 60px rgba(0,229,200,0.06);
}
.auth-logo{text-align:center;margin-bottom:28px}
.auth-logo .logo{font-size:20px}
.auth-tagline{font-size:12px;color:var(--text3);margin-top:4px;font-style:italic}
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:12px;font-weight:500;color:var(--text2);margin-bottom:6px;font-family:var(--font-display)}
.form-input{
  width:100%;padding:11px 14px;border-radius:var(--r-sm);
  border:1px solid var(--border2);
  background:var(--bg3);color:var(--text);
  font-size:14px;font-family:var(--font-body);
  outline:none;transition:border-color .2s,box-shadow .2s;
}
.form-input:focus{border-color:var(--wave);box-shadow:0 0 0 3px rgba(0,229,200,0.08)}
.form-input::placeholder{color:var(--text3)}
.form-error{font-size:12px;color:var(--coral);margin-top:4px;display:none}
.form-error.show{display:block}
.auth-switch{text-align:center;margin-top:20px;font-size:13px;color:var(--text3)}
.auth-switch a{color:var(--wave);cursor:pointer;text-decoration:none;font-weight:500}
.auth-switch a:hover{text-decoration:underline}

/* ── Stat boxes ──────────────────────────────────── */
.stat-box{background:var(--bg3);border-radius:var(--r-sm);padding:14px;text-align:center;border:1px solid var(--border)}
.stat-v{font-family:var(--font-display);font-size:26px;font-weight:800}
.stat-l{font-size:11px;color:var(--text3);margin-top:2px}

/* ── Streak dots ─────────────────────────────────── */
.s-dot{width:7px;height:7px;border-radius:50%;background:var(--wave);box-shadow:0 0 6px rgba(0,229,200,0.5)}
.s-dot.e{background:var(--bg5);box-shadow:none}

/* ── Phase strip ─────────────────────────────────── */
.phase-strip{display:flex;border-radius:var(--r);overflow:hidden;border:1px solid var(--border);margin-bottom:20px}
.pnode{flex:1;padding:9px 6px;text-align:center;font-size:11px;font-weight:600;color:var(--text3);background:var(--bg2);border-right:1px solid var(--border);transition:all .3s;font-family:var(--font-display);letter-spacing:.3px}
.pnode:last-child{border-right:none}
.pnode.done{background:var(--wave-dim);color:var(--wave)}
.pnode.act{background:var(--deep-dim);color:var(--deep)}

/* ── Tutor ───────────────────────────────────────── */
.tutor-row{display:flex;gap:13px;align-items:flex-start;margin-bottom:18px}
.tutor-icon{width:40px;height:40px;border-radius:50%;flex-shrink:0;background:linear-gradient(135deg,var(--wave),var(--deep));display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:var(--glow-wave)}
.tutor-bubble{background:var(--bg3);border:1px solid var(--border2);border-radius:4px 16px 16px 16px;padding:14px 18px;font-size:14px;line-height:1.7;color:var(--text);max-width:88%}

/* ── Choice buttons ──────────────────────────────── */
.choice-btn{
  width:100%;padding:12px 16px;text-align:left;font-size:13px;cursor:pointer;
  border-radius:var(--r-sm);border:1px solid var(--border2);
  background:var(--bg3);color:var(--text);transition:all .18s;
  margin-bottom:8px;display:block;font-family:var(--font-body);
}
.choice-btn:hover{border-color:var(--deep);background:var(--deep-dim);color:var(--deep)}
.choice-btn.ok{border-color:var(--wave);background:var(--wave-dim);color:var(--wave)}
.choice-btn.no{border-color:var(--coral);background:var(--coral-dim);color:var(--coral)}

/* ── Textarea ────────────────────────────────────── */
textarea{
  width:100%;border-radius:var(--r-sm);
  border:1px solid var(--border2);background:var(--bg3);color:var(--text);
  padding:13px;font-size:14px;font-family:var(--font-body);
  resize:none;outline:none;transition:border-color .2s;line-height:1.6;
}
textarea:focus{border-color:var(--wave);box-shadow:0 0 0 3px rgba(0,229,200,0.08)}

/* ── Art bars ────────────────────────────────────── */
.art-row{display:flex;align-items:center;gap:10px;padding:6px 0;border-bottom:1px solid var(--border);cursor:pointer;transition:background .15s;border-radius:4px}
.art-row:last-child{border-bottom:none}
.art-row:hover{background:var(--bg3);padding-left:6px}
.art-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}

/* ── Match card ──────────────────────────────────── */
.match-card{background:linear-gradient(135deg,rgba(61,123,255,0.12),rgba(0,229,200,0.08));border:1px solid rgba(61,123,255,0.25);border-radius:var(--r);padding:15px;cursor:pointer;transition:box-shadow .2s}
.match-card:hover{box-shadow:var(--glow-deep)}

/* ── XP animation ────────────────────────────────── */
@keyframes xpp{0%,100%{opacity:1}50%{opacity:.65}}
.xp-live{animation:xpp 2.5s infinite}
@keyframes burst{0%{transform:scale(.85);opacity:0}65%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}
.burst{animation:burst .4s cubic-bezier(.4,0,.2,1) forwards}

/* ── Loading spinner ─────────────────────────────── */
@keyframes spin{to{transform:rotate(360deg)}}
.spinner{width:18px;height:18px;border:2px solid var(--border2);border-top-color:var(--wave);border-radius:50%;animation:spin .7s linear infinite}

/* ── Responsive ──────────────────────────────────── */
@media(max-width:860px){
  .g3,.g4{grid-template-columns:1fr!important}
  .g2{grid-template-columns:1fr!important}
  .page{padding-left:12px;padding-right:12px;padding-top:66px}
  .nav{padding:0 14px;gap:10px}
  .nav-tabs .nav-tab{padding:5px 8px;font-size:11px}
  .logo{font-size:13px}
  h1{font-size:20px}
  h2{font-size:17px}
  .auth-card{padding:28px 20px}
}
@media(max-width:480px){
  .nav-tabs .nav-tab{padding:4px 6px;font-size:10px}
  .logo{font-size:12px}
  .stat-v{font-size:20px}
}