/* SOSYAL PİYANO - Main Design System - Dark Luxury Theme */
:root {
  --bg-primary: #0a0a1a;
  --bg-secondary: #12122a;
  --glass-bg: rgba(25, 25, 60, 0.55);
  --glass-border: rgba(120, 100, 255, 0.15);
  --accent: #8b5cf6;
  --accent-dark: #6d28d9;
  --accent-glow: rgba(139, 92, 246, 0.4);
  --accent-pink: #ec4899;
  --accent-cyan: #22d3ee;
  --accent-gold: #f59e0b;
  --accent-green: #10b981;
  --text-1: #f1f0ff;
  --text-2: #a5a3c7;
  --text-3: #6b6990;
  --danger: #ef4444;
  --success: #22c55e;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px var(--accent-glow);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --font: 'Inter', system-ui, sans-serif;
  --font-display: 'Outfit', 'Inter', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-1);
  min-height: 100vh;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(139,92,246,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(236,72,153,0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(34,211,238,0.05) 0%, transparent 50%);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.glass-bar {
  background: rgba(15,15,40,0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

/* ENTRY OVERLAY - floating card over the piano */
.entry-overlay {
  position: fixed; inset: 0;
  background: rgba(5,5,20,0.75);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  z-index: 300;
  animation: fadeIn .4s;
}
.entry-overlay.hidden { display: none; }
.entry-overlay .entry-card { padding: 32px 24px; max-width: 420px; width: 90%; animation: slideUp .5s var(--ease-spring); }
.entry-logo { text-align: center; margin-bottom: 24px; }
.logo-icon { font-size: 3rem; display: block; margin-bottom: 8px; filter: drop-shadow(0 0 20px var(--accent-glow)); animation: float 3s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.logo-title { font-family: var(--font-display); font-size: 1.8rem; font-weight: 800; background: linear-gradient(135deg, var(--accent), var(--accent-pink)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.logo-subtitle { color: var(--text-2); font-size: .85rem; font-weight: 300; letter-spacing: 2px; text-transform: uppercase; margin-top: 4px; }
.entry-form { display: flex; flex-direction: column; gap: 20px; }
.input-group { display: flex; flex-direction: column; gap: 4px; }
.input-group label { font-size: .85rem; font-weight: 600; color: var(--text-2); text-transform: uppercase; letter-spacing: 1px; }
.input-group input[type="text"] { background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-md); padding: 14px 16px; font-size: 1rem; color: var(--text-1); font-family: var(--font); transition: all .3s; outline: none; }
.input-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(139,92,246,.15); background: rgba(255,255,255,.08); }
.input-hint { font-size: .75rem; color: var(--text-3); }

/* BUTTONS */
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; border: none; border-radius: var(--radius-md); padding: 14px 28px; font-size: 1rem; font-weight: 600; font-family: var(--font); cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px; transition: all .3s; position: relative; overflow: hidden; }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; }
.btn-primary:not(:disabled):hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.btn-glow::after { content:''; position: absolute; inset: -2px; border-radius: inherit; background: linear-gradient(135deg, var(--accent), var(--accent-pink), var(--accent)); z-index: -1; opacity: 0; transition: opacity .3s; filter: blur(8px); }
.btn-glow:not(:disabled):hover::after { opacity: .6; }
.btn-secondary { background: rgba(255,255,255,.08); color: var(--text-1); border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius-md); padding: 10px 20px; font-size: .9rem; font-weight: 500; font-family: var(--font); cursor: pointer; transition: all .2s; }
.btn-secondary:hover { background: rgba(255,255,255,.12); }
.btn-sm { padding: 8px 16px; font-size: .85rem; }
.btn-danger { background: var(--danger); color: #fff; border: none; border-radius: var(--radius-md); padding: 10px 20px; font-size: .85rem; font-weight: 500; cursor: pointer; font-family: var(--font); }
.btn-icon { width: 40px; height: 40px; border-radius: var(--radius-sm); border: 1px solid rgba(255,255,255,.08); background: rgba(255,255,255,.05); color: var(--text-2); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all .2s; font-size: .95rem; }
.btn-icon:hover { background: rgba(255,255,255,.1); color: var(--text-1); }
.error-msg { color: var(--danger); font-size: .85rem; text-align: center; min-height: 1.2em; }
.live-dot { width: 8px; height: 8px; background: var(--success); border-radius: 50%; display: inline-block; animation: blink 2s infinite; margin-right: 4px; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:.3} }
.entry-footer { text-align: center; margin-top: 24px; font-size: .85rem; color: var(--text-3); }

/* MAIN SCREEN */
#main-screen { display: flex; flex-direction: column; min-height: 100vh; }
.top-bar { display: flex; align-items: center; justify-content: space-between; padding: 8px 24px; height: 56px; position: sticky; top: 0; z-index: 100; }
.top-left { display: flex; align-items: center; gap: 8px; }
.logo-mini { font-size: 1.3rem; }
.app-name { font-family: var(--font-display); font-weight: 700; font-size: 1rem; }
.room-badge { background: rgba(139,92,246,.2); color: var(--accent); padding: 3px 10px; border-radius: var(--radius-full); font-size: .75rem; font-weight: 600; }
.top-right { display: flex; align-items: center; gap: 8px; }
.listener-count { display: flex; align-items: center; gap: 6px; font-size: .9rem; color: var(--text-2); padding: 4px 12px; border-radius: var(--radius-full); background: rgba(255,255,255,.05); }
.stage-area { flex: 1; display: flex; flex-direction: column; align-items: center; padding: 24px 24px 16px; gap: 24px; max-width: 1000px; margin: 0 auto; width: 100%; }
.now-playing { width: 100%; padding: 16px 24px; text-align: center; position: relative; overflow: hidden; }
.np-idle { display: flex; align-items: center; justify-content: center; gap: 8px; color: var(--text-3); font-size: .95rem; }
.np-idle i { color: var(--accent); }
.np-active { width: 100%; }
.np-player { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 8px; }
.np-emoji { font-size: 1.6rem; }
.np-name { font-family: var(--font-display); font-weight: 700; font-size: 1.2rem; }
.np-timer { display: flex; align-items: center; gap: 8px; }
.timer-bar-container { flex: 1; height: 6px; background: rgba(255,255,255,.1); border-radius: var(--radius-full); overflow: hidden; }
.timer-bar { height: 100%; width: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-pink)); border-radius: var(--radius-full); transition: width 1s linear; box-shadow: 0 0 10px var(--accent-glow); }
.timer-text { font-size: .85rem; font-weight: 700; color: var(--accent); min-width: 35px; text-align: right; font-variant-numeric: tabular-nums; }
.piano-wrapper { width: 100%; position: relative; display: flex; flex-direction: column; align-items: center; }
.piano-particles { position: absolute; inset: 0; pointer-events: none; z-index: 10; overflow: hidden; }
.piano-labels { display: flex; width: 100%; padding: 4px 8px 0; }
.octave-label { font-size: .7rem; color: var(--text-3); font-weight: 600; }
.controls-bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn-action { border: none; border-radius: var(--radius-md); padding: 12px 24px; font-size: .9rem; font-weight: 600; font-family: var(--font); cursor: pointer; display: flex; align-items: center; gap: 8px; transition: all .2s; }
.btn-queue { background: linear-gradient(135deg, var(--accent-green), #059669); color: #fff; }
.btn-queue:hover { transform: translateY(-2px); box-shadow: 0 0 20px rgba(16,185,129,.4); }
.btn-skip { background: linear-gradient(135deg, var(--accent-gold), #d97706); color: #fff; }
.btn-skip:hover { transform: translateY(-2px); }
.btn-leave-queue { background: rgba(239,68,68,.15); color: var(--danger); border: 1px solid rgba(239,68,68,.3); }
.btn-leave-queue:hover { background: rgba(239,68,68,.25); }
.volume-control { display: flex; align-items: center; gap: 8px; color: var(--text-2); font-size: .9rem; }
.slider { -webkit-appearance: none; width: 100px; height: 4px; background: rgba(255,255,255,.15); border-radius: var(--radius-full); outline: none; }
.slider::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: var(--accent); cursor: pointer; box-shadow: 0 0 8px var(--accent-glow); }

/* LAYOUT SELECTOR */
.layout-selector { display: flex; align-items: center; gap: 6px; padding: 4px; background: rgba(255,255,255,.04); border-radius: var(--radius-md); border: 1px solid rgba(255,255,255,.08); }
.layout-btn { background: none; border: none; color: var(--text-3); font-family: var(--font); font-size: .75rem; font-weight: 600; padding: 5px 10px; border-radius: 6px; cursor: pointer; transition: all .2s; }
.layout-btn:hover { color: var(--text-1); background: rgba(255,255,255,.06); }
.layout-btn.active { color: var(--accent); background: rgba(139,92,246,.15); }

/* SIDE PANEL */
.side-panel { position: fixed; right: 16px; top: 72px; bottom: 16px; width: 280px; display: flex; flex-direction: column; overflow: hidden; z-index: 50; }
.panel-tabs { display: flex; border-bottom: 1px solid rgba(255,255,255,.08); }
.panel-tab { flex: 1; padding: 8px 16px; background: none; border: none; color: var(--text-3); font-family: var(--font); font-size: .8rem; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 6px; transition: all .2s; border-bottom: 2px solid transparent; }
.panel-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.panel-tab:hover { color: var(--text-1); }
.tab-count { background: rgba(139,92,246,.2); color: var(--accent); padding: 1px 6px; border-radius: var(--radius-full); font-size: .7rem; }
.panel-content { flex: 1; overflow-y: auto; padding: 8px; }
.queue-list, .listeners-list { display: flex; flex-direction: column; gap: 4px; }
.queue-item, .listener-item { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border-radius: var(--radius-sm); background: rgba(255,255,255,.03); font-size: .85rem; transition: background .2s; }
.queue-item:hover, .listener-item:hover { background: rgba(255,255,255,.06); }
.queue-position { width: 22px; height: 22px; background: var(--accent); color: #fff; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: .7rem; font-weight: 700; }
.queue-item-name, .listener-item-name { flex: 1; font-weight: 500; }
.empty-state { text-align: center; padding: 32px; color: var(--text-3); }
.empty-state i { font-size: 2rem; margin-bottom: 8px; display: block; opacity: .3; }
.empty-state p { font-size: .85rem; }

/* MODALS */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 200; animation: fadeIn .2s; }
.modal { width: 90%; max-width: 500px; max-height: 80vh; display: flex; flex-direction: column; animation: slideUp .3s var(--ease-spring); }
.modal-sm { max-width: 380px; }
.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; border-bottom: 1px solid rgba(255,255,255,.08); }
.modal-header h2 { font-family: var(--font-display); font-size: 1.1rem; display: flex; align-items: center; gap: 8px; }
.btn-close { width: 32px; height: 32px; border-radius: 50%; border: none; background: rgba(255,255,255,.05); color: var(--text-3); cursor: pointer; display: flex; align-items: center; justify-content: center; transition: all .2s; }
.btn-close:hover { background: rgba(255,255,255,.1); color: var(--text-1); }
.modal-body { padding: 24px; overflow-y: auto; }
.room-actions { display: flex; flex-direction: column; gap: 16px; margin-bottom: 24px; }
.room-create, .room-join { display: flex; gap: 8px; }
.room-create input, .room-join input { flex: 1; background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-sm); padding: 8px 12px; color: var(--text-1); font-family: var(--font); font-size: .9rem; outline: none; }
.room-create input:focus, .room-join input:focus { border-color: var(--accent); }
.rooms-list { display: flex; flex-direction: column; gap: 8px; }
.room-list-item { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; background: rgba(255,255,255,.03); border-radius: var(--radius-sm); cursor: pointer; transition: all .2s; }
.room-list-item:hover { background: rgba(255,255,255,.06); }
.room-info { display: flex; flex-direction: column; gap: 2px; }
.room-info strong { font-size: .9rem; }
.room-info small { color: var(--text-3); font-size: .75rem; }
.setting-item { display: flex; align-items: center; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,.05); }
.setting-item label { font-weight: 500; font-size: .9rem; }
.midi-status { font-size: .8rem; color: var(--text-3); padding: 4px 10px; background: rgba(255,255,255,.05); border-radius: var(--radius-full); }
.keyboard-map-mini { display: flex; flex-direction: column; gap: 2px; font-family: monospace; font-size: .65rem; color: var(--text-3); text-align: right; }
.note-particle { position: absolute; width: 6px; height: 6px; border-radius: 50%; pointer-events: none; animation: particle-rise 1.2s ease-out forwards; }
@keyframes particle-rise { 0%{opacity:1;transform:translateY(0) scale(1)} 100%{opacity:0;transform:translateY(-80px) scale(.3)} }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }
@keyframes slideUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
.mobile-panel-toggle { display: none; position: fixed; bottom: 16px; right: 16px; width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: #fff; border: none; box-shadow: var(--shadow-md); cursor: pointer; z-index: 60; font-size: 1rem; align-items: center; justify-content: center; }

@media (max-width: 900px) {
  .side-panel { position: fixed; left: 0; right: 0; bottom: 0; top: auto; width: 100%; height: 40vh; border-radius: var(--radius-lg) var(--radius-lg) 0 0; transform: translateY(calc(100% - 48px)); transition: transform .4s var(--ease-out); z-index: 90; }
  .side-panel.open { transform: translateY(0); }
  .mobile-panel-toggle { display: flex; align-items: center; justify-content: center; }
  .stage-area { padding: 16px 8px 60px; gap: 16px; }
}
@media (max-width: 600px) {
  .top-bar { padding: 8px; }
  .app-name { display: none; }
  .btn-action { padding: 10px 16px; font-size: .8rem; }
  .volume-control { display: none; }
  .entry-overlay .entry-card { padding: 24px 16px; }
}