:root {
  --bg: #070b13;
  --bg-glow: #16223c;
  --panel: #131a2b;
  --panel-2: #1b2438;
  --line: #29344f;
  --text: #e8edf8;
  --muted: #8c98b6;
  --accent: #34e0c4;
  --accent-2: #7c5cff;
  --hot: #ff5d73;
  --gold: #ffd166;
  --white-key: #eef3ff;
  --black-key: #161c2c;
  --shadow: 0 14px 40px rgba(0, 0, 0, 0.5);
  --radius: 16px;
  font-family: "Poppins", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(124,92,255,0.18), transparent 60%),
    radial-gradient(900px 500px at 90% 0%, rgba(52,224,196,0.14), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

#app { max-width: 1180px; margin: 0 auto; padding: 22px 20px 70px; }

/* ---------- En-tête ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.brand h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.tagline { margin: 4px 0 0; color: var(--muted); font-size: 0.92rem; }
.lang select { min-width: 130px; }

/* ---------- Onglets ---------- */
.tabs {
  display: flex;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.tab {
  flex: 1;
  background: transparent;
  color: var(--muted);
  border: none;
  border-radius: 999px;
  padding: 11px 14px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s;
}
.tab:hover { color: var(--text); }
.tab.active {
  color: #07101a;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 6px 18px rgba(52, 224, 196, 0.3);
}

/* ---------- Panneaux ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.panel.hidden { display: none; }
.panel-head { margin-bottom: 14px; }
.panel-head h2 { margin: 0 0 4px; font-size: 1.25rem; }
.panel-head p { margin: 0; color: var(--muted); font-size: 0.9rem; }

/* ---------- Boutons & contrôles ---------- */
select, .btn, input[type="text"] {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 13px;
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.05s, background 0.15s, box-shadow 0.15s;
}
input[type="text"] { cursor: text; }
select:hover, .btn:hover, input[type="text"]:focus { border-color: var(--accent); outline: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #07101a;
  font-weight: 700;
  border: none;
}
.btn-rec { font-weight: 700; }
.btn-rec.recording {
  background: var(--hot);
  border-color: var(--hot);
  color: #fff;
  animation: pulse 1s infinite;
}
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(255,93,115,0.5); } 50% { box-shadow: 0 0 0 8px rgba(255,93,115,0); } }

input[type="range"] {
  -webkit-appearance: none; appearance: none;
  height: 6px; background: var(--line); border-radius: 999px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); cursor: pointer; box-shadow: 0 0 8px rgba(52,224,196,0.6);
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border: none; border-radius: 50%; background: var(--accent); cursor: pointer;
}

/* ---------- Réglages ---------- */
.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 14px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}
.control-group { display: flex; flex-direction: column; gap: 6px; }
.preset-group { grid-column: 1 / -1; }
.preset-group select { font-weight: 600; }
.control-group label {
  font-size: 0.78rem; color: var(--muted); text-transform: uppercase;
  letter-spacing: 0.5px; display: flex; justify-content: space-between;
}
.control-group .val { color: var(--accent); font-weight: 600; }

/* ---------- Oscilloscope ---------- */
.scope-wrap {
  position: relative; background: #05080e;
  border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
}
#scope { display: block; width: 100%; height: 180px; }
.scope-label { position: absolute; top: 8px; left: 12px; font-size: 0.68rem; letter-spacing: 3px; color: var(--muted); }

/* ---------- Barre de jeu ---------- */
.game-bar { display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.game-bar-left, .game-bar-right { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.speed-label { font-size: 0.72rem; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }
.stat {
  display: flex; flex-direction: column; align-items: center;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px;
  padding: 5px 12px; min-width: 64px;
}
.stat-label { font-size: 0.62rem; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
.stat span:last-child { font-size: 1.15rem; font-weight: 700; color: var(--accent); }

/* ---------- Notes qui tombent ---------- */
.falls-wrap { position: relative; }
#falls {
  display: block; width: 100%; height: 300px;
  background: linear-gradient(180deg, #090e1b 0%, #0d1426 100%);
  border-radius: 12px 12px 0 0; border: 1px solid var(--line); border-bottom: none;
}
.judgement {
  position: absolute; top: 36%; left: 50%;
  transform: translate(-50%, -50%); font-size: 2.4rem; font-weight: 800;
  opacity: 0; pointer-events: none; text-shadow: 0 2px 14px rgba(0,0,0,0.6);
}
.judgement.show { animation: pop 0.55s ease-out; }
@keyframes pop {
  0% { opacity: 0; transform: translate(-50%, -38%) scale(0.6); }
  30% { opacity: 1; transform: translate(-50%, -50%) scale(1.18); }
  100% { opacity: 0; transform: translate(-50%, -64%) scale(1); }
}

/* ---------- Barre d'expression ---------- */
.expr-bar { display: flex; gap: 10px; justify-content: center; margin: 0 0 12px; flex-wrap: wrap; }
.expr-pill {
  display: flex; align-items: center; gap: 8px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 999px;
  padding: 7px 16px; color: var(--muted); font-size: 0.85rem; font-weight: 600;
  transition: all 0.12s;
}
.expr-pill kbd { font-size: 0.72rem; }
.expr-pill.active {
  color: #07101a; border-color: transparent;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 18px rgba(52, 224, 196, 0.45);
}
.expr-pill.active kbd { background: rgba(7,16,26,0.25); color: #07101a; border-color: rgba(7,16,26,0.3); }

/* ---------- Clavier ---------- */
.piano {
  position: relative; display: flex; height: 200px; user-select: none;
  border-radius: 0 0 12px 12px; overflow: hidden; border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.key { position: relative; cursor: pointer; transition: background 0.05s, transform 0.05s; }
.key.white {
  flex: 1; background: linear-gradient(180deg, #ffffff, var(--white-key));
  border-right: 1px solid #c4ccdc; color: #2a3550;
  display: flex; flex-direction: column; justify-content: flex-end; align-items: center; padding-bottom: 10px;
}
.key.white:last-child { border-right: none; }
.key.white.active {
  background: linear-gradient(180deg, #d6fff7, var(--accent));
  box-shadow: inset 0 -5px 14px rgba(52,224,196,0.5);
}
.key.black {
  position: absolute; top: 0; width: 5.2%; height: 60%;
  background: linear-gradient(180deg, #2a3450, var(--black-key));
  border: 1px solid #000; border-radius: 0 0 5px 5px; z-index: 2; color: #cfd8ee;
  display: flex; flex-direction: column; justify-content: flex-end; align-items: center;
  padding-bottom: 7px; box-shadow: 0 4px 6px rgba(0,0,0,0.5);
}
.key.black.active {
  background: linear-gradient(180deg, #9b80ff, var(--accent-2));
  box-shadow: inset 0 -5px 12px rgba(124,92,255,0.7);
}
.key .note-name { font-size: 0.72rem; font-weight: 700; }
.key .key-cap {
  font-size: 0.6rem; opacity: 0.65; text-transform: uppercase;
  border: 1px solid currentColor; border-radius: 4px; padding: 0 4px; margin-top: 3px;
}
.key.black .key-cap { border-color: #6f7aa0; }

/* ---------- Créer ---------- */
.recorder { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-bottom: 18px; }
.rec-status { color: var(--hot); font-weight: 600; min-width: 130px; font-size: 0.9rem; }
.song-name { min-width: 180px; flex: 1; }
.subhead { margin: 6px 0 10px; font-size: 1rem; color: var(--muted); }
.custom-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.custom-list li {
  display: flex; align-items: center; gap: 10px;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px;
}
.custom-list .song-title { font-weight: 600; flex: 1; }
.custom-list .song-meta { color: var(--muted); font-size: 0.8rem; }
.custom-list .empty { color: var(--muted); justify-content: center; }
.icon-btn {
  background: var(--panel); border: 1px solid var(--line); color: var(--text);
  border-radius: 8px; padding: 6px 10px; cursor: pointer; font: inherit; font-size: 0.82rem;
}
.icon-btn:hover { border-color: var(--accent); }
.icon-btn.danger:hover { border-color: var(--hot); color: var(--hot); }

/* ---------- Astuces ---------- */
.hints { margin-top: 18px; text-align: center; color: var(--muted); font-size: 0.85rem; }
kbd {
  background: var(--panel-2); border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 5px; padding: 1px 6px; font-family: inherit; color: var(--text); font-size: 0.85em;
}

/* ---------- Footer (Bros AI) ---------- */
.app-footer {
  width: 100%;
  border-top: 1px solid var(--line);
  margin-top: 10px;
  padding: 18px 20px 28px;
}
.footer-content {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 14px;
}
.made-with-love {
  color: var(--muted); text-decoration: none; font-size: 0.85rem; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px; transition: color 0.2s;
}
.made-with-love:hover { color: var(--text); }
.made-with-love .heart { font-style: normal; }
.footer-links { display: flex; gap: 12px; align-items: center; }
.footer-links a {
  color: var(--muted); display: inline-flex; align-items: center; transition: color 0.2s, transform 0.15s;
}
.footer-links a:hover { color: var(--accent); transform: translateY(-2px); }
.footer-links a svg { width: 20px; height: 20px; fill: currentColor; }
.footer-follow {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #07101a; border: none; border-radius: 999px; padding: 7px 16px;
  font: inherit; font-weight: 700; font-size: 0.82rem; cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
}
.footer-follow:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(52,224,196,0.35); }

/* ---------- Modale Follow ---------- */
.follow-card { max-width: 440px; position: relative; max-height: 92vh; overflow-y: auto; }
.follow-close {
  position: absolute; top: 12px; right: 14px;
  background: none; border: none; color: var(--muted); font-size: 1.2rem; cursor: pointer;
  line-height: 1; transition: color 0.15s;
}
.follow-close:hover { color: var(--text); }
.follow-emoji { font-size: 2.6rem; margin-bottom: 6px; }
.follow-card h2 {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-size: 1.5rem; margin: 0 0 6px;
}
.follow-sub { color: var(--muted); margin: 0 0 18px; font-size: 0.9rem; }
.follow-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 16px; }
.follow-btn {
  display: flex; flex-direction: column; align-items: center; gap: 7px;
  padding: 14px 8px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--text); text-decoration: none;
  font-size: 0.78rem; font-weight: 600; transition: all 0.15s;
}
.follow-btn svg { width: 26px; height: 26px; fill: currentColor; }
.follow-btn:hover {
  border-color: var(--accent); background: var(--panel);
  transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0,0,0,0.35);
}
.follow-btn.star { border-color: var(--gold); color: var(--gold); grid-column: 1 / -1; flex-direction: row; }
.follow-btn.star:hover { box-shadow: 0 6px 18px rgba(255,209,102,0.3); }
.follow-later {
  background: none; border: 1px solid var(--line); color: var(--muted);
  border-radius: 10px; padding: 9px 18px; font: inherit; font-size: 0.85rem; cursor: pointer;
  transition: all 0.15s; margin-top: 4px;
}
.follow-later:hover { color: var(--text); border-color: var(--accent); }

/* divider */
.follow-divider {
  display: flex; align-items: center; gap: 12px;
  color: var(--muted); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 1.5px;
  margin: 4px 0 14px;
}
.follow-divider::before, .follow-divider::after {
  content: ""; flex: 1; height: 1px; background: var(--line);
}

/* boutons de partage */
.share-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-bottom: 12px; }
.share-btn {
  display: flex; flex-direction: column; align-items: center; gap: 5px;
  padding: 11px 4px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--panel-2); color: var(--muted); text-decoration: none;
  font-size: 0.68rem; font-weight: 600; transition: all 0.15s;
}
.share-btn svg { width: 20px; height: 20px; fill: currentColor; }
.share-btn:hover { border-color: var(--accent); color: var(--text); transform: translateY(-2px); }
.share-copy-row { display: flex; gap: 8px; }
.share-copy-input {
  flex: 1; background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 12px; font: inherit; font-size: 0.78rem; color: var(--muted); outline: none;
}
.share-copy-input:focus { border-color: var(--accent); }
.share-copy-btn {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 16px; font: inherit; font-size: 0.8rem; font-weight: 600; color: var(--text);
  cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.share-copy-btn:hover { border-color: var(--accent); }
.share-copy-btn.copied { color: var(--accent); border-color: var(--accent); }

/* bouton Partager du footer */
.footer-share {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--text);
  border-radius: 999px; padding: 7px 16px; font: inherit; font-weight: 600; font-size: 0.82rem;
  cursor: pointer; transition: all 0.15s;
}
.footer-share:hover { border-color: var(--accent); transform: translateY(-1px); }

/* ---------- Overlay résultats ---------- */
.overlay {
  position: fixed; inset: 0; background: rgba(4, 7, 13, 0.8);
  display: flex; align-items: center; justify-content: center; z-index: 50; backdrop-filter: blur(5px);
}
.overlay.hidden { display: none; }
.overlay-card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 18px;
  padding: 32px 42px; text-align: center; box-shadow: var(--shadow); max-width: 420px;
  animation: rise 0.3s ease-out;
}
@keyframes rise { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
.overlay-card h2 {
  margin-top: 0; font-size: 1.9rem;
  background: linear-gradient(90deg, var(--gold), var(--hot));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.overlay-card .big-score { font-size: 3rem; font-weight: 800; color: var(--accent); margin: 8px 0; }
.overlay-card .line { color: var(--muted); margin: 4px 0; }
.overlay-card .line b { color: var(--text); }

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(40px);
  background: var(--panel-2); border: 1px solid var(--accent); color: var(--text);
  padding: 12px 22px; border-radius: 12px; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: all 0.3s; z-index: 60; font-weight: 600;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 640px) {
  .brand h1 { font-size: 1.5rem; }
  #falls { height: 230px; }
  .piano { height: 160px; }
  .tab { font-size: 0.82rem; padding: 9px 6px; }
}