/* ═══════════════════════════════════════════════════════════════════════════
   SyncPlayer — RTL Mobile-First Dark Theme
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── CSS Variables ──────────────────────────────────────────────────────── */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #121212;
  --bg-card: #18181b;
  --bg-card-hover: #1f1f23;
  --surface-1: #1c1c1f;
  --surface-2: #27272a;
  --surface-3: #3f3f46;
  --text-primary: #f4f4f5;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent: #7c3aed;
  --accent-hover: #6d28d9;
  --accent-light: #a78bfa;
  --accent-gradient: linear-gradient(135deg, #7c3aed, #6366f1);
  --danger: #ef4444;
  --success: #22c55e;
  --border: rgba(255,255,255,0.06);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(124,58,237,0.15);
  --transition: 0.2s ease;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-top: env(safe-area-inset-top, 0px);
  --bottom-nav-h: 64px;
}

/* ── Reset ──────────────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{touch-action:manipulation;-webkit-tap-highlight-color:transparent}
body{
  font-family:'Vazirmatn',-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg-primary);color:var(--text-primary);
  min-height:100vh;line-height:1.7;direction:rtl;
  -webkit-font-smoothing:antialiased;
  padding-bottom:var(--bottom-nav-h);
  padding-bottom:calc(var(--bottom-nav-h) + var(--safe-bottom));
}
a{color:var(--accent-light);text-decoration:none}
a:hover{color:var(--accent)}
.hidden{display:none!important}
[dir="ltr"]{direction:ltr;text-align:start;font-family:'Inter',-apple-system,sans-serif}

/* ── Navigation ─────────────────────────────────────────────────────────── */
.nav{
  border-bottom:1px solid var(--border);
  background:rgba(10,10,10,0.85);
  backdrop-filter:blur(12px);
  position:sticky;top:0;z-index:100;
}
.nav-inner{
  max-width:1200px;margin:0 auto;padding:0 16px;
  height:56px;display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:17px;color:var(--text-primary)}
.nav-logo svg{color:var(--accent)}
.nav-links{display:flex;align-items:center;gap:8px;overflow-x:auto}
.nav-link{color:var(--text-secondary);font-weight:500;font-size:13px;white-space:nowrap}
.nav-user{color:var(--accent-light);font-weight:600;font-size:13px;white-space:nowrap}
.plan-badge{font-size:10px;font-weight:700;padding:2px 8px;border-radius:20px;white-space:nowrap}
.plan-basic{background:rgba(99,102,241,0.15);color:#a5b4fc}
.plan-pro{background:linear-gradient(135deg,rgba(124,58,237,0.2),rgba(99,102,241,0.2));color:var(--accent-light)}

/* Bottom Navigation (mobile) */
.bottom-nav{
  position:fixed;bottom:0;inset-inline:0;z-index:150;
  background:rgba(18,18,18,0.95);backdrop-filter:blur(12px);
  border-top:1px solid var(--border);
  display:flex;justify-content:space-around;align-items:center;
  height:var(--bottom-nav-h);
  padding-bottom:var(--safe-bottom);
}
.bottom-nav-item{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  color:var(--text-muted);font-size:10px;font-weight:500;
  padding:4px 12px;min-width:56px;min-height:48px;justify-content:center;
  transition:color var(--transition);
}
.bottom-nav-item:hover,.bottom-nav-item.active{color:var(--accent-light)}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  font-family:inherit;font-weight:600;border:none;
  border-radius:var(--radius-sm);cursor:pointer;
  transition:all var(--transition);text-decoration:none;white-space:nowrap;
  min-height:40px;padding:8px 16px;font-size:14px;
}
.btn:disabled{opacity:0.5;cursor:not-allowed}
.btn-primary{background:var(--accent-gradient);color:#fff}
.btn-primary:hover:not(:disabled){filter:brightness(1.15);transform:translateY(-1px);box-shadow:var(--shadow-glow)}
.btn-ghost{background:transparent;color:var(--text-secondary)}
.btn-ghost:hover{background:var(--surface-2);color:var(--text-primary)}
.btn-danger:hover{color:var(--danger);background:rgba(239,68,68,0.1)}
.btn-sm{padding:6px 12px;font-size:12px;min-height:32px}
.btn-lg{padding:14px 28px;font-size:16px;min-height:48px}
.btn-full{width:100%}
.btn-icon{padding:8px;min-width:40px}

/* ── Hero (landing) ────────────────────────────────────────────────────── */
.hero{display:flex;align-items:center;justify-content:center;min-height:80vh;text-align:center;padding:40px 20px}
.hero-content{max-width:560px}
.hero-icon{
  display:inline-flex;width:100px;height:100px;align-items:center;justify-content:center;
  background:var(--surface-1);border-radius:50%;margin-bottom:20px;box-shadow:var(--shadow-glow)
}
.hero-icon svg{color:var(--accent)}
.hero-title{font-size:36px;font-weight:900;line-height:1.3;margin-bottom:12px}
.gradient-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:16px;color:var(--text-secondary);line-height:1.8;margin-bottom:28px}
.hero-buttons{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ── Auth pages ─────────────────────────────────────────────────────────── */
.auth-page{display:flex;align-items:center;justify-content:center;min-height:80vh;padding:24px 16px}
.auth-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:32px 24px;
  width:100%;max-width:400px;box-shadow:var(--shadow)
}
.auth-card h2{font-size:22px;font-weight:800;margin-bottom:6px}
.auth-subtitle{color:var(--text-secondary);margin-bottom:28px;font-size:14px}

/* ── Forms ──────────────────────────────────────────────────────────────── */
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:12px;font-weight:700;color:var(--text-secondary);letter-spacing:0.3px}
.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="file"]{
  background:var(--surface-1);border:1px solid var(--surface-3);
  border-radius:var(--radius-sm);padding:12px 14px;font-size:15px;
  font-family:inherit;color:var(--text-primary);
  transition:border-color var(--transition)
}
.form-group input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,58,237,0.15)}
.form-group input[type="file"]{padding:8px;cursor:pointer}
.form-group input[type="file"]::file-selector-button{
  background:var(--surface-2);border:none;color:var(--text-primary);
  padding:6px 14px;border-radius:4px;margin-inline-end:12px;cursor:pointer;font-family:inherit
}
.form-hint{font-size:11px;color:var(--text-muted)}
.form-error{
  background:rgba(239,68,68,0.1);border:1px solid rgba(239,68,68,0.3);
  color:var(--danger);padding:10px 14px;border-radius:var(--radius-sm);font-size:13px
}
.auth-form{display:flex;flex-direction:column;gap:18px}
.auth-footer{text-align:center;margin-top:24px;color:var(--text-muted);font-size:13px}
.text-muted{color:var(--text-muted)}

/* ── Dashboard ──────────────────────────────────────────────────────────── */
.dashboard{max-width:1200px;margin:0 auto;padding:20px 16px 32px}
.dash-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.dash-header h1{font-size:24px;font-weight:800}
.dash-subtitle{color:var(--text-secondary);margin-top:4px;font-size:14px}
.playlist-grid{display:grid;grid-template-columns:1fr;gap:12px}
.playlist-card,.library-card{
  background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);
  display:flex;align-items:center;gap:14px;padding:16px;transition:all var(--transition)
}
.playlist-card:hover,.library-card:hover{border-color:var(--surface-3)}
.playlist-card-art{
  width:56px;height:56px;background:var(--accent-gradient);border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;flex-shrink:0
}
.playlist-card-art svg{color:#fff}
.playlist-card-body{flex:1;min-width:0}
.playlist-card-body h3{font-size:15px;font-weight:700;margin-bottom:2px}
.playlist-card-meta{font-size:12px;color:var(--text-muted);margin-bottom:8px}
.playlist-card-actions{display:flex;gap:4px}
.empty-state{
  grid-column:1/-1;text-align:center;padding:60px 24px;color:var(--text-muted)
}
.empty-state svg{margin-bottom:12px;color:var(--surface-3)}
.empty-state h3{font-size:18px;color:var(--text-secondary);margin-bottom:6px}

/* Library cards */
.library-card-icon{
  width:48px;height:48px;background:var(--surface-1);border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--accent)
}
.library-card-body{flex:1;min-width:0}
.library-card-body h4{font-size:14px;font-weight:600}
.library-card-body p{font-size:12px;color:var(--text-muted)}
.lib-meta{font-size:11px;color:var(--text-muted)}

/* ── Storage Bar ────────────────────────────────────────────────────────── */
.storage-bar-container{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px;margin-bottom:20px
}
.storage-info{display:flex;justify-content:space-between;margin-bottom:8px;font-size:13px}
.storage-label{color:var(--text-secondary)}
.storage-value{color:var(--accent-light);font-weight:600}
.storage-bar{height:6px;background:var(--surface-2);border-radius:3px;margin-bottom:10px;overflow:hidden}
.storage-fill{height:100%;background:var(--accent-gradient);border-radius:3px;transition:width 0.3s}
.storage-plan{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--text-secondary)}

/* ── Plans ──────────────────────────────────────────────────────────────── */
.plans-grid{display:grid;grid-template-columns:1fr;gap:16px;max-width:900px;margin:0 auto}
.plan-card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius-lg);padding:24px;position:relative
}
.plan-featured{border-color:var(--accent);box-shadow:0 0 30px rgba(124,58,237,0.1)}
.plan-current{opacity:0.7}
.plan-card h3{font-size:18px;font-weight:700;margin-bottom:12px}
.plan-price{font-size:28px;font-weight:900;margin-bottom:16px}
.plan-price span{font-size:14px;font-weight:500;color:var(--text-muted)}
.plan-features{list-style:none;margin-bottom:20px}
.plan-features li{padding:6px 0;font-size:13px;color:var(--text-secondary)}
.plan-features li::before{content:'✓ ';color:var(--success);margin-inline-end:6px}
.plan-badge-current{position:absolute;top:12px;inset-inline-start:12px;font-size:10px;font-weight:700;background:var(--surface-2);padding:4px 10px;border-radius:20px;color:var(--text-secondary)}
.plan-badge-pro{position:absolute;top:12px;inset-inline-start:12px;font-size:10px;font-weight:700;background:var(--accent-gradient);padding:4px 10px;border-radius:20px;color:#fff}

/* ── Player Layout (mobile-first) ───────────────────────────────────────── */
.player-container{
  display:flex;flex-direction:column;
  height:calc(100vh - 56px);overflow:hidden;position:relative
}
.player-main{
  flex:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  padding:24px 20px;gap:24px;overflow-y:auto
}

/* ── Now Playing ────────────────────────────────────────────────────────── */
.now-playing{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
.now-playing-art{
  width:160px;height:160px;background:var(--surface-1);
  border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-glow);border:1px solid var(--border);flex-shrink:0
}
.now-playing-art svg{color:var(--accent);opacity:0.6}
.now-playing-info h2{font-size:20px;font-weight:800;margin-bottom:4px}
.now-playing-info p{color:var(--text-secondary);font-size:13px}

/* ── Progress bar ───────────────────────────────────────────────────────── */
.progress-container{display:flex;align-items:center;gap:10px;width:100%;max-width:480px}
.time-label{font-size:11px;color:var(--text-muted);width:36px;text-align:center;flex-shrink:0}
.progress-bar{
  flex:1;height:6px;background:var(--surface-2);border-radius:3px;
  cursor:pointer;position:relative;overflow:visible
}
.progress-fill{height:100%;background:var(--accent-gradient);border-radius:3px;width:0%;transition:width 0.1s linear}
.progress-bar:active .progress-fill{height:10px;margin-top:-2px;border-radius:5px}

/* ── Controls ───────────────────────────────────────────────────────────── */
.controls{display:flex;align-items:center;gap:16px}
.ctrl-btn{
  background:none;border:none;color:var(--text-primary);cursor:pointer;
  padding:10px;border-radius:50%;transition:all var(--transition);
  display:flex;align-items:center;justify-content:center;
  min-width:44px;min-height:44px
}
.ctrl-btn:hover{color:var(--accent-light);background:rgba(124,58,237,0.1)}
.ctrl-btn:active{transform:scale(0.94)}
.ctrl-btn-play{
  width:60px;height:60px;background:var(--accent-gradient);
  border-radius:50%;box-shadow:var(--shadow-glow)
}
.ctrl-btn-play:hover{filter:brightness(1.1);transform:scale(1.05)}
.ctrl-btn-play:active{transform:scale(0.95)}
.ctrl-btn.active{color:var(--accent-light)}
.ctrl-btn.active::after{
  content:'';position:absolute;bottom:4px;width:4px;height:4px;
  background:var(--accent-light);border-radius:50%
}

/* ── Player extras (volume, actions) ───────────────────────────────────── */
.player-extras{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center
}
.volume-control{display:flex;align-items:center;gap:6px}
.volume-icon{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:6px;min-width:40px;min-height:40px;display:flex;align-items:center;justify-content:center}
.volume-slider{
  width:80px;height:4px;-webkit-appearance:none;appearance:none;
  background:var(--surface-2);border-radius:2px;outline:none
}
.volume-slider::-webkit-slider-thumb{
  -webkit-appearance:none;width:16px;height:16px;
  background:var(--accent);border-radius:50%;cursor:pointer
}
.player-actions-top{display:flex;align-items:center;gap:6px}
.listener-badge{
  display:flex;align-items:center;gap:4px;font-size:12px;
  color:var(--accent-light);padding:4px 10px;border-radius:20px;
  background:rgba(124,58,237,0.1);transition:background 0.3s
}

/* ── Track Sheet (bottom sheet on mobile, sidebar on desktop) ───────────── */
.track-sheet{
  position:fixed;bottom:0;inset-inline:0;z-index:160;
  background:var(--bg-secondary);border-start-start-radius:20px;border-start-end-radius:20px;
  max-height:55vh;overflow-y:auto;padding:0 12px 24px;
  transform:translateY(100%);transition:transform 0.3s cubic-bezier(0.4,0,0.2,1);
  box-shadow:0 -4px 24px rgba(0,0,0,0.5);border-top:1px solid var(--border)
}
.track-sheet.open{transform:translateY(0)}
.track-sheet-handle{
  width:36px;height:4px;background:var(--surface-3);border-radius:2px;
  margin:10px auto 16px
}
.track-sheet-backdrop{
  position:fixed;inset:0;z-index:159;background:rgba(0,0,0,0.5)
}
.track-sheet-header{padding:0 8px 12px}
.track-sheet-header h3{font-size:16px;font-weight:700}
.sidebar-owner{font-size:12px;color:var(--text-muted)}

/* ── Track List ─────────────────────────────────────────────────────────── */
.track-list{list-style:none;padding:0 4px}
.track-item{
  display:flex;align-items:center;gap:10px;padding:12px 10px;
  border-radius:var(--radius-sm);cursor:pointer;transition:background var(--transition)
}
.track-item:hover{background:var(--surface-1)}
.track-item.active{background:rgba(124,58,237,0.12)}
.track-item.active .track-title{color:var(--accent-light)}
.track-num{width:24px;text-align:center;font-size:13px;color:var(--text-muted);flex-shrink:0}
.track-item.active .track-num{color:var(--accent-light)}
.track-info{flex:1;min-width:0}
.track-title{display:block;font-size:14px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.track-artist{font-size:11px;color:var(--text-muted)}
.track-dur{font-size:11px;color:var(--text-muted);flex-shrink:0}

/* ── Loading Screen ─────────────────────────────────────────────────────── */
.loading-screen{position:fixed;inset:0;background:var(--bg-primary);display:flex;align-items:center;justify-content:center;z-index:200}
.loading-inner{text-align:center;max-width:440px;width:100%;padding:24px}
.loading-ring{margin-bottom:16px}
.loading-inner h2{font-size:20px;font-weight:800;margin-bottom:6px}
.loading-status{font-size:15px;color:var(--text-secondary);margin-bottom:16px}
.loading-progress-bar{height:4px;background:var(--surface-2);border-radius:2px;margin-bottom:10px;overflow:hidden}
.loading-progress-fill{height:100%;background:var(--accent-gradient);width:0%;transition:width 0.3s ease}
.upload-progress{margin-bottom:16px;text-align:center}
.upload-progress.hidden{display:none}
.upload-progress-bar{height:6px;background:var(--surface-2);border-radius:3px;overflow:hidden;margin-bottom:6px}
.upload-progress-fill{height:100%;background:var(--accent-gradient);border-radius:3px;width:0%;transition:width 0.15s linear}
.upload-progress-text{font-size:13px;color:var(--text-secondary);font-weight:600}
.loading-detail{font-size:12px;color:var(--text-muted);margin-bottom:16px}
.loading-track-list{text-align:start}
.loading-track-item{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:var(--radius-sm);font-size:13px}
.loading-track-item.downloading{background:rgba(124,58,237,0.06)}
.loading-track-item.cached{opacity:0.7}
.loading-track-item.failed{color:var(--danger)}
.load-icon{width:20px;text-align:center;flex-shrink:0}
.load-name{flex:1;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.load-artist{color:var(--text-muted);font-size:11px;flex-shrink:0}
.load-size{color:var(--text-muted);font-size:10px;flex-shrink:0}

/* ── Modal ──────────────────────────────────────────────────────────────── */
.modal{position:fixed;inset:0;z-index:300;display:flex;align-items:flex-end;justify-content:center}
.modal-backdrop{position:absolute;inset:0;background:rgba(0,0,0,0.7);backdrop-filter:blur(4px)}
.modal-content{
  position:relative;background:var(--bg-card);border:1px solid var(--border);
  border-radius:20px 20px 0 0;padding:24px 20px;width:100%;max-height:85vh;
  overflow-y:auto;box-shadow:var(--shadow)
}
.modal-content h3{font-size:18px;font-weight:700;margin-bottom:16px}
.modal-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}

/* ── Modal tabs ─────────────────────────────────────────────────────────── */
.modal-tabs{display:flex;gap:0;border-bottom:1px solid var(--border);margin-bottom:16px}
.modal-tab{
  flex:1;background:none;border:none;color:var(--text-muted);
  padding:10px 12px;font-size:13px;font-weight:600;font-family:inherit;
  cursor:pointer;border-bottom:2px solid transparent;transition:all var(--transition)
}
.modal-tab.active{color:var(--accent-light);border-bottom-color:var(--accent)}

/* ── Search box ─────────────────────────────────────────────────────────── */
.search-box{
  display:flex;align-items:center;gap:8px;
  background:var(--surface-1);border:1px solid var(--surface-3);
  border-radius:var(--radius-sm);padding:0 12px;margin-bottom:12px
}
.search-box svg{color:var(--text-muted);flex-shrink:0}
.search-input{
  flex:1;background:none;border:none;color:var(--text-primary);font-family:inherit;
  font-size:14px;padding:10px 0;outline:none
}
.search-input::placeholder{color:var(--text-muted)}

/* ── Library list ───────────────────────────────────────────────────────── */
.library-list{max-height:50vh;overflow-y:auto}
.library-item{
  display:flex;align-items:center;gap:10px;padding:10px;border-radius:var(--radius-sm);
  cursor:pointer;transition:background var(--transition)
}
.library-item:hover{background:var(--surface-1)}
.library-item.selected{background:rgba(124,58,237,0.1)}
.library-item input[type="checkbox"]{accent-color:var(--accent);width:16px;height:16px}
.library-item-info{flex:1;min-width:0}
.lib-title{font-size:14px;font-weight:500;display:block}
.lib-artist{font-size:11px;color:var(--text-muted)}
.lib-dur{font-size:11px;color:var(--text-muted);flex-shrink:0}

/* ── Desktop (768px+) ───────────────────────────────────────────────────── */
@media (min-width: 768px) {
  body{padding-bottom:0}
  .bottom-nav{display:none}
  .hero-title{font-size:48px}
  .hero-desc{font-size:18px}
  .playlist-grid{grid-template-columns:repeat(auto-fill,minmax(340px,1fr))}
  .plans-grid{grid-template-columns:repeat(3,1fr)}

  /* Player: sidebar layout */
  .player-container{flex-direction:row}
  .player-main{padding:32px 40px;gap:28px}
  .now-playing-art{width:220px;height:220px}
  .now-playing-info h2{font-size:24px}

  /* Track sheet becomes a fixed sidebar */
  .track-sheet{
    position:relative;bottom:auto;inset-inline:auto;z-index:auto;
    width:300px;max-height:none;height:100%;transform:none;
    border-radius:0;box-shadow:none;border-top:none;
    border-inline-start:1px solid var(--border);overflow-y:auto;
    flex-shrink:0;padding:20px 12px
  }
  .track-sheet-backdrop{display:none}
  .track-sheet-handle{display:none}

  /* Modal: centered */
  .modal{align-items:center}
  .modal-content{border-radius:var(--radius-lg);max-width:480px}
  .modal-content.modal-lg{max-width:580px}
  .library-list{max-height:40vh}

  .auth-card{padding:40px}
}

/* ── Large desktop (1024px+) ────────────────────────────────────────────── */
@media (min-width: 1024px) {
  .now-playing-art{width:260px;height:260px}
  .track-sheet{width:340px}
  .controls{gap:20px}
  .ctrl-btn-play{width:68px;height:68px}
}

/* ── Toast ──────────────────────────────────────────────────────────────── */
.toast{
  position:fixed;bottom:80px;inset-inline:50%;transform:translateX(-50%);
  padding:12px 24px;border-radius:var(--radius-sm);font-size:13px;
  font-weight:500;z-index:400;animation:toastIn 0.3s ease
}
.toast-error{background:rgba(239,68,68,0.15);border:1px solid rgba(239,68,68,0.3);color:var(--danger)}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}