/* ============================================================
   DSK•Zeth — Global Styles
   Theme variables set by themes.js via CSS custom properties
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0a0a0a; --bg2: #141414; --bg3: #1c1c1c;
  --panel-bg: #141414; --border: #242424;
  --text: #d8d8d8; --text-muted: #505050; --text-dim: #383838;
  --accent: #00ff88; --accent-dim: #00994d; --accent-glow: rgba(0,255,136,.18);
  --key-white: #e8e8e8; --key-active: #00ff88;
  --key-black: #1a1a1a; --key-black-a: #004422;
  --danger: #ff4444; --warn: #ffaa00;
  --knob-track: #242424; --knob-center: #0f0f0f; --knob-dot: #ffffff;
  --header-bg: #0a0a0a; --scrollbar: #242424;
  --header-h: 48px; --presetbar-h: 44px; --recordbar-h: 38px; --kb-h: 160px;
  --font-ui: system-ui,-apple-system,'Segoe UI',sans-serif;
  --font-mono: 'Courier New',Consolas,monospace;
}

html, body { height: 100%; overflow: hidden; background: var(--bg); color: var(--text); font-family: var(--font-ui); font-size: 13px; -webkit-tap-highlight-color: transparent; user-select: none; }
body { display: flex; flex-direction: column; }

/* Scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ============================================================ HEADER */
#header {
  flex: none; height: var(--header-h);
  background: var(--header-bg); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; padding: 0 12px; gap: 12px;
  z-index: 100; min-width: 0;
}
.header-left { display: flex; align-items: center; gap: 8px; min-width: 0; overflow: hidden; }
.app-name { font-size: 18px; font-weight: 800; color: var(--accent); white-space: nowrap; letter-spacing: -0.5px; text-shadow: 0 0 12px var(--accent-glow); }
.header-sep { color: var(--text-dim); font-size: 16px; }
.header-credit { font-size: 11px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-right { display: flex; align-items: center; gap: 8px; margin-left: auto; flex: none; }
.viz-canvas { width: 120px; height: 36px; background: var(--bg2); border-radius: 4px; border: 1px solid var(--border); }
.midi-status { font-size: 12px; color: var(--text-muted); cursor: default; transition: color 0.3s; }
.settings-btn { font-size: 16px; }

/* ============================================================ BUTTONS */
.btn { display: inline-flex; align-items: center; justify-content: center; cursor: pointer; border: 1px solid var(--border); border-radius: 4px; font-family: var(--font-ui); font-size: 11px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; transition: all 0.15s; background: var(--bg3); color: var(--text); padding: 5px 10px; white-space: nowrap; }
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn:active { opacity: 0.7; }
.btn-xs { padding: 3px 7px; font-size: 10px; }
.btn-sm { padding: 4px 9px; font-size: 11px; }
.btn-accent { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-dim); border-color: var(--accent-dim); color: var(--bg); }
.btn-secondary { background: var(--bg2); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { opacity: 0.85; }
.btn-record { background: var(--danger); color: #fff; border-color: var(--danger); font-weight: 700; }
.btn-record.recording { animation: pulse-rec 1s ease-in-out infinite; }
@keyframes pulse-rec { 0%,100%{opacity:1} 50%{opacity:0.5} }

.icon-btn { background: none; border: 1px solid transparent; border-radius: 4px; color: var(--text-muted); cursor: pointer; font-size: 14px; padding: 4px 7px; transition: all 0.15s; }
.icon-btn:hover { border-color: var(--border); color: var(--accent); }
.help-icon-btn { background: var(--accent); color: var(--bg); border: none; border-radius: 50%; width: 22px; height: 22px; font-size: 12px; font-weight: 700; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.help-icon-btn:hover { opacity: 0.8; }

/* ============================================================ PRESET BAR */
.preset-bar {
  flex: none; height: var(--presetbar-h);
  background: var(--bg2); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px; padding: 0 10px;
  overflow-x: auto; overflow-y: hidden;
}
.preset-nav { display: flex; align-items: center; gap: 2px; }
.preset-nav-btn { padding: 3px 6px; font-size: 10px; }
.preset-select { background: var(--bg3); border: 1px solid var(--border); color: var(--text); border-radius: 4px; padding: 4px 6px; font-size: 12px; max-width: 160px; cursor: pointer; }
.preset-name-display { font-size: 12px; color: var(--accent); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 120px; }
.preset-actions { display: flex; gap: 4px; flex: none; }
.bpm-wrap { display: flex; align-items: center; gap: 4px; margin-left: auto; flex: none; }
.bpm-label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; }
.bpm-input { width: 52px; background: var(--bg3); border: 1px solid var(--border); color: var(--accent); border-radius: 4px; padding: 3px 5px; text-align: center; font-size: 13px; font-family: var(--font-mono); font-weight: 700; }
.bpm-input:focus { outline: none; border-color: var(--accent); }

/* ============================================================ MAIN SYNTH AREA */
.synth-main {
  flex: 1; overflow-y: auto; overflow-x: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  grid-template-rows: auto 1fr;
  min-height: 0;
}
.tab-nav {
  grid-column: 1/-1; grid-row: 1;
  display: none; /* hidden on desktop */
  background: var(--bg2); border-bottom: 1px solid var(--border);
  gap: 0; overflow-x: auto;
}
.tab-btn { flex: 1; min-width: 50px; background: none; border: none; border-bottom: 2px solid transparent; color: var(--text-muted); cursor: pointer; padding: 8px 6px; font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; transition: all 0.15s; }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-btn:hover { color: var(--text); }
.badge { color: var(--accent); font-size: 8px; vertical-align: super; }

/* Panels */
.panel {
  background: var(--panel-bg); border-right: 1px solid var(--border);
  overflow-y: auto; overflow-x: hidden;
  padding: 10px; display: flex; flex-direction: column; gap: 8px;
  grid-row: 2;
  min-height: 0;
}
.panel:last-of-type { border-right: none; }

/* Desktop grid placement */
#oscPanel    { grid-column: 1; }
#filterPanel { grid-column: 2; }
#envPanel    { grid-column: 3; }
#modPanel    { grid-column: 4; }
#fxPanel     { grid-column: 1/-1; grid-row: 2; display: none; }
#arpPanel    { display: none; }

/* Panel header */
.panel-header { display: flex; align-items: center; gap: 8px; padding-bottom: 6px; border-bottom: 1px solid var(--border); flex: none; }
.panel-title { font-size: 11px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 1px; }

/* ============================================================ SELECTS */
.ctrl-select { background: var(--bg3); border: 1px solid var(--border); color: var(--text); border-radius: 4px; padding: 3px 5px; font-size: 11px; font-family: var(--font-ui); cursor: pointer; max-width: 120px; }
.ctrl-select:focus { outline: none; border-color: var(--accent); }
.mode-wrap, .filter-type-wrap { display: flex; align-items: center; gap: 5px; margin-left: auto; }
.mode-wrap label, .filter-type-wrap label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; }

/* ============================================================ KNOBS */
.knob-wrap { display: flex; flex-direction: column; align-items: center; gap: 2px; width: 60px; cursor: ns-resize; }
.knob-wrap.big-knob { width: 80px; }
.knob-canvas { cursor: ns-resize; touch-action: none; }
.knob-wrap.big-knob .knob-canvas { width: 72px; height: 72px; }
.knob-label { font-size: 9px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; text-align: center; white-space: nowrap; }
.knob-val { font-size: 9px; color: var(--accent); font-family: var(--font-mono); text-align: center; min-height: 12px; white-space: nowrap; }

/* ============================================================ SLIDERS */
.slider-wrap { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 44px; }
.param-slider { -webkit-appearance: none; appearance: none; width: 44px; height: 3px; background: var(--knob-track); border-radius: 2px; outline: none; cursor: pointer; }
.param-slider::-webkit-slider-thumb { -webkit-appearance: none; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); cursor: pointer; }
.param-slider::-moz-range-thumb { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); border: none; cursor: pointer; }
.slider-label { font-size: 9px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; }
.slider-val { font-size: 9px; color: var(--accent); font-family: var(--font-mono); }

/* ============================================================ CHECKBOXES */
input[type=checkbox] { -webkit-appearance: none; appearance: none; width: 16px; height: 16px; border: 1px solid var(--border); border-radius: 3px; background: var(--bg); cursor: pointer; position: relative; flex: none; }
input[type=checkbox]:checked { background: var(--accent); border-color: var(--accent); }
input[type=checkbox]:checked::after { content: ''; position: absolute; top: 2px; left: 5px; width: 4px; height: 7px; border: 2px solid var(--bg); border-top: none; border-left: none; transform: rotate(45deg); }
input[type=checkbox]:hover { border-color: var(--accent); }

/* ============================================================ OSC PANEL */
.osc-rows { display: flex; flex-direction: column; gap: 6px; }
.osc-row { display: flex; flex-direction: column; gap: 8px; padding: 8px; background: var(--bg3); border-radius: 5px; border: 1px solid var(--border); }
.osc-top { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.osc-knobs { display: flex; align-items: flex-start; gap: 24px; justify-content: center; padding-top: 6px; border-top: 1px solid var(--border); }
.osc-label { font-size: 10px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; min-width: 32px; }
.osc-type { max-width: 60px; font-size: 10px; }
.osc-extra-row { display: flex; align-items: center; gap: 8px; padding: 6px 6px; background: var(--bg3); border-radius: 5px; border: 1px solid var(--border); flex-wrap: wrap; }
.row-label { font-size: 10px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; }
#fmSection { display: none; }

/* ============================================================ FILTER PANEL */
.filter-main-knobs { display: flex; justify-content: center; gap: 20px; padding: 10px 0; }
.filter-extra-knobs { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }

/* ============================================================ ENV PANEL */
.env-section { display: flex; flex-direction: column; gap: 6px; padding: 8px; background: var(--bg3); border-radius: 5px; border: 1px solid var(--border); }
.env-label { font-size: 10px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; }
.env-canvas { width: 100%; height: 60px; border-radius: 3px; background: var(--bg2); }
.env-knobs { display: flex; gap: 8px; justify-content: space-around; }

/* ============================================================ MOD PANEL */
.lfo-section { padding: 6px; background: var(--bg3); border-radius: 5px; border: 1px solid var(--border); }
.lfo-header { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; font-size: 10px; font-weight: 700; color: var(--accent); text-transform: uppercase; }
.lfo-controls { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.lfo-shape-dest { display: flex; flex-direction: column; gap: 3px; }
.lfo-shape-dest .ctrl-select { font-size: 10px; }

.mm-section { padding: 6px; background: var(--bg3); border-radius: 5px; border: 1px solid var(--border); }
.mm-header { font-size: 10px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 6px; }
.mm-grid { display: flex; flex-direction: column; gap: 4px; }
.mod-slot { display: flex; align-items: center; gap: 4px; padding: 3px 4px; background: var(--bg2); border-radius: 3px; border: 1px solid var(--border); }
.mm-source, .mm-dest { font-size: 10px; max-width: 72px; }
.mm-arrow { color: var(--text-muted); font-size: 10px; }
.mm-knob { width: 44px; }
.mm-knob .knob-canvas { width: 40px; height: 40px; }
.mm-knob .knob-val { font-size: 8px; }

/* ============================================================ FX PANEL */
#fxPanel { display: none; } /* shown on mobile only via tabs */
.fx-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; }
.fx-block { padding: 8px; background: var(--bg3); border-radius: 5px; border: 1px solid var(--border); display: flex; flex-direction: column; gap: 6px; align-items: center; }
.fx-header { display: flex; align-items: center; gap: 5px; align-self: stretch; font-size: 10px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; border-bottom: 1px solid var(--border); padding-bottom: 4px; }
.fx-header input[type=checkbox] { width: 14px; height: 14px; }
.fx-header:has(input:checked) span { color: var(--accent); }

/* ============================================================ ARP PANEL */
.arp-active-wrap { display: flex; align-items: center; gap: 5px; margin-left: auto; font-size: 10px; color: var(--text-muted); text-transform: uppercase; }
.arp-controls { display: flex; flex-direction: column; gap: 8px; }
.arp-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.arp-row label { font-size: 10px; color: var(--text-muted); text-transform: uppercase; }
.arp-knobs { display: flex; gap: 16px; justify-content: center; }

/* ============================================================ RECORD BAR */
.record-bar {
  flex: none; height: var(--recordbar-h);
  background: var(--bg2); border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px; padding: 0 12px;
}
.record-time { font-family: var(--font-mono); font-size: 13px; color: var(--accent); min-width: 36px; }

/* ============================================================ KEYBOARD AREA */
.keyboard-area {
  flex: none; height: var(--kb-h);
  background: var(--bg); border-top: 1px solid var(--border);
  display: flex; flex-direction: column;
}
.kb-controls {
  flex: none; height: 36px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px; padding: 0 10px;
  overflow-x: auto;
}
.kb-nav { display: flex; align-items: center; gap: 4px; }
.octave-display { font-family: var(--font-mono); font-size: 12px; color: var(--accent); min-width: 24px; text-align: center; }
.kb-toggles { display: flex; gap: 8px; margin-left: auto; }
.toggle-label { display: flex; align-items: center; gap: 4px; font-size: 10px; color: var(--text-muted); text-transform: uppercase; cursor: pointer; white-space: nowrap; }
.toggle-label input { width: 14px; height: 14px; }
.tilt-row { display: flex; align-items: center; gap: 8px; justify-content: center; flex-wrap: wrap; }
#tiltBlock { width: 100%; align-items: stretch; }
#tiltBlock .ctrl-select { flex: 1; min-width: 0; }

/* Pitch Bend / Mod Wheel */
.wheel-wrap { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.wheel-label { font-size: 8px; color: var(--text-muted); text-transform: uppercase; }
.wheel { width: 18px; height: 24px; background: var(--bg); border: 1px solid var(--border); border-radius: 3px; cursor: ns-resize; overflow: hidden; position: relative; }
.wheel-fill { position: absolute; bottom: 0; left: 0; right: 0; background: var(--accent); border-radius: 2px; transition: height 0.05s; opacity: 0.7; }

/* Piano keyboard */
#keyboard {
  flex: 1; position: relative; overflow-x: auto; overflow-y: hidden;
  background: var(--bg);
  touch-action: none;
  padding: 0 10px; box-sizing: border-box;
}
.key { position: absolute; cursor: pointer; border-radius: 0 0 3px 3px; transition: background 0.04s; touch-action: none; }
.key.white {
  background: var(--key-white); border: 1px solid #bbb; border-top: none;
  box-shadow: 0 2px 3px rgba(0,0,0,.3);
}
.key.black {
  background: var(--key-black); border: 1px solid #000;
  box-shadow: 0 3px 5px rgba(0,0,0,.5);
}
.key.white.active { background: var(--key-active); }
.key.black.active { background: var(--key-black-a); }
.key.white.sustained { background: var(--key-active); opacity: 0.72; }
.key.black.sustained { background: var(--key-black-a); opacity: 0.85; }
[data-dark="0"] .key.white.active { background: var(--key-active); }

/* ============================================================ SETTINGS OVERLAY */
.settings-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.65); z-index: 500;
  display: flex; justify-content: flex-end;
}
.settings-overlay.hidden { display: none; }
.settings-panel {
  width: 280px; height: 100%; background: var(--bg2);
  border-left: 1px solid var(--border);
  display: flex; flex-direction: column; overflow-y: auto;
}
.settings-header {
  display: flex; align-items: center; gap: 8px; padding: 12px;
  border-bottom: 1px solid var(--border); flex: none;
}
.settings-header h2 { font-size: 14px; font-weight: 700; color: var(--accent); margin: 0; text-transform: uppercase; letter-spacing: 1px; }
.settings-section { padding: 12px; border-bottom: 1px solid var(--border); }
.settings-section h3 { font-size: 10px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.settings-actions { display: flex; flex-direction: column; gap: 6px; }
.settings-footer { padding: 12px; margin-top: auto; display: flex; flex-direction: column; gap: 4px; }
.version { font-size: 10px; color: var(--text-muted); }
.settings-credit { font-size: 11px; color: var(--text-muted); }
.settings-credit a { color: var(--accent); }

/* Themes */
.theme-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.theme-btn { background: var(--bg3); border: 1px solid var(--border); border-radius: 5px; cursor: pointer; padding: 6px 8px; display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text); transition: all 0.15s; }
.theme-btn.active { border-color: var(--accent); color: var(--accent); }
.theme-btn:hover { border-color: var(--accent-dim); }
.theme-swatch { width: 14px; height: 14px; border-radius: 3px; flex: none; }

/* Language */
.lang-options { display: flex; gap: 6px; }
.lang-btn { background: var(--bg3); border: 1px solid var(--border); border-radius: 4px; cursor: pointer; padding: 6px 10px; font-size: 12px; color: var(--text); transition: all 0.15s; }
.lang-btn.active { border-color: var(--accent); color: var(--accent); }
.lang-btn:hover { border-color: var(--accent-dim); }

/* ============================================================ MODALS */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.7); z-index: 600;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.hidden { display: none; }
/* Confirm/prompt dialog must sit above all other modals (preset manager, sfz, etc.) */
#dialogOverlay { z-index: 800; }
.dialog-box {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 8px;
  padding: 24px; max-width: 340px; width: 100%; display: flex; flex-direction: column; gap: 16px;
}
.dialog-box p { font-size: 13px; line-height: 1.5; text-align: center; }
.dialog-input { width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 4px; padding: 8px; font-size: 13px; }
.dialog-input:focus { outline: none; border-color: var(--accent); }
.dialog-btns { display: flex; gap: 8px; justify-content: center; }
.modal-box {
  background: var(--bg2); border: 1px solid var(--border); border-radius: 8px;
  width: min(90vw, 600px); max-height: 80vh; display: flex; flex-direction: column; overflow: hidden;
}
.modal-header { display: flex; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--border); flex: none; }
.modal-header h2 { font-size: 14px; font-weight: 700; color: var(--accent); margin: 0; text-transform: uppercase; letter-spacing: 1px; flex: 1; }
.modal-toolbar { display: flex; align-items: center; gap: 6px; padding: 8px 12px; border-bottom: 1px solid var(--border); flex: none; flex-wrap: wrap; }
.search-input { flex: 1; min-width: 120px; background: var(--bg); border: 1px solid var(--border); color: var(--text); border-radius: 4px; padding: 5px 8px; font-size: 12px; }
.search-input:focus { outline: none; border-color: var(--accent); }
.preset-manager-list { flex: 1; overflow-y: auto; padding: 8px; }
.pm-row { display: flex; align-items: center; gap: 8px; padding: 7px 8px; border-radius: 4px; border-bottom: 1px solid var(--border); }
.pm-row:last-child { border-bottom: none; }
.pm-row.active { background: var(--bg3); }
.pm-row:hover { background: var(--bg3); }
.pm-name { flex: 1; font-size: 12px; font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pm-cat { font-size: 10px; color: var(--text-muted); min-width: 44px; }
.pm-star { font-size: 10px; color: var(--warn); min-width: 12px; }
.pm-btns { display: flex; gap: 3px; flex: none; }
.help-content { padding: 16px; overflow-y: auto; flex: 1; }
.help-content p { margin-bottom: 12px; line-height: 1.6; font-size: 13px; }
.help-content p:first-child { color: var(--accent); font-weight: 600; }

/* ============================================================ MODE SWITCH (Play vs Advanced) */
.advanced-toggle { background: var(--bg3); }
body[data-mode="advanced"] .advanced-toggle { background: var(--accent); color: var(--bg); border-color: var(--accent); }
body[data-mode="play"] #synthMain,
body[data-mode="play"] #presetBar { display: none !important; }
body[data-mode="advanced"] #playScreen { display: none !important; }

/* ============================================================ PLAY SCREEN */
.play-screen {
  flex: 1; min-height: 0; overflow-y: auto; scrollbar-width: none;
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse 80% 60% at 50% 35%, var(--accent-glow), transparent 70%),
    var(--bg);
}
.play-screen::-webkit-scrollbar { display: none; }
.play-hero { display: flex; flex-direction: column; align-items: center; gap: 22px; padding: 24px; width: 100%; max-width: 460px; }
.play-viz { width: 240px; height: 120px; max-width: 80vw; border-radius: 14px; background: var(--bg2); border: 1px solid var(--border); box-shadow: 0 8px 30px rgba(0,0,0,.35); cursor: pointer; }
.play-preset-block { display: flex; align-items: center; gap: 10px; }
.play-nav { font-size: 18px; padding: 6px 12px; border: 1px solid var(--border); border-radius: 8px; }
.play-preset-name {
  background: var(--bg2); border: 1px solid var(--border); color: var(--accent);
  border-radius: 8px; padding: 9px 22px; font-size: 16px; font-weight: 700; cursor: pointer;
  min-width: 160px; max-width: 240px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  letter-spacing: .3px; transition: border-color .15s;
}
.play-preset-name:hover { border-color: var(--accent); }

/* Mega random button */
.random-mega {
  position: relative; width: 200px; height: 200px; border: none; background: none;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  -webkit-tap-highlight-color: transparent;
}
.rm-ring, .rm-ring2 {
  position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid var(--accent); opacity: .35;
  animation: rm-pulse 3s ease-out infinite;
}
.rm-ring2 { animation-delay: 1.5s; }
@keyframes rm-pulse { 0% { transform: scale(.7); opacity: .5; } 100% { transform: scale(1.15); opacity: 0; } }
.rm-core {
  position: relative; width: 150px; height: 150px; border-radius: 50%;
  background: radial-gradient(circle at 38% 32%, var(--accent), var(--accent-dim));
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  box-shadow: 0 0 38px var(--accent-glow), 0 10px 30px rgba(0,0,0,.45), inset 0 -6px 16px rgba(0,0,0,.25);
  color: var(--bg); transition: transform .12s ease, box-shadow .2s;
}
.random-mega:hover .rm-core { transform: scale(1.04); box-shadow: 0 0 54px var(--accent-glow), 0 12px 34px rgba(0,0,0,.5); }
.random-mega:active .rm-core { transform: scale(.95); }
.random-mega.spin .rm-dice { animation: rm-spin .5s ease; }
@keyframes rm-spin { 0% { transform: rotate(0); } 100% { transform: rotate(360deg); } }
.rm-dice { font-size: 48px; line-height: 1; }
.rm-label { font-size: 17px; font-weight: 800; letter-spacing: 2px; }
.play-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; width: 100%; max-width: 320px; }
.play-act { padding: 13px; font-size: 12px; }
.play-rec { color: var(--danger); border-color: var(--danger); }
.play-rec .rec-dot { color: var(--danger); }
.play-rec.recording { background: var(--danger); color: #fff; animation: pulse-rec 1s ease-in-out infinite; }
.play-rec.recording .rec-dot { color: #fff; }

/* ============================================================ RECORD MODAL */
.rec-body { padding: 16px; display: flex; flex-direction: column; gap: 14px; }
.rec-wave-wrap { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 4px; }
.rec-wave { width: 100%; height: 70px; display: block; }
.rec-player { display: flex; align-items: center; gap: 10px; }
.rec-play-btn { width: 44px; height: 44px; border-radius: 50%; background: var(--accent); color: var(--bg); border: none; font-size: 16px; cursor: pointer; flex: none; }
.rec-seek { flex: 1; height: 6px; background: var(--knob-track); border-radius: 3px; overflow: hidden; cursor: pointer; }
.rec-seek-fill { height: 100%; width: 0; background: var(--accent); }
.rec-dur { font-family: var(--font-mono); font-size: 12px; color: var(--accent); min-width: 38px; }
.rec-fmt .cnt-btn { width: auto; padding: 0 18px; height: 32px; font-size: 12px; }
.rec-actions { display: flex; gap: 10px; }
.rec-actions .btn { flex: 1; padding: 12px; }

/* ============================================================ SFZ OPTIONS */
.sfz-opt { flex-wrap: wrap; }
.sfz-opt .cnt-btn { width: auto; padding: 0 12px; height: 30px; font-size: 12px; }
.sfz-toggles { display: flex; gap: 18px; padding: 4px 0; flex-wrap: wrap; }
.sfz-loop-opts { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.sfz-loop-opts.hidden { display: none; }
.big-toggle { font-size: 12px; gap: 7px; }
.big-toggle input { width: 20px; height: 20px; }
.sfz-custom-wrap { display: flex; align-items: center; gap: 6px; }
.sfz-custom-wrap.hidden { display: none; }

/* ============================================================ RESPONSIVE — TABLET & DESKTOP LANDSCAPE */
@media (min-width: 900px) {
  :root { --kb-h: 180px; }
  .tab-nav { display: none !important; }
  .synth-main {
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: minmax(320px, 1fr) minmax(210px, auto);
  }
  .panel { display: flex !important; overflow-y: auto; }
  #oscPanel    { grid-column: 1; grid-row: 1; }
  #filterPanel { grid-column: 2; grid-row: 1; }
  #envPanel    { grid-column: 3; grid-row: 1; }
  #modPanel    { grid-column: 4; grid-row: 1; }
  #fxPanel {
    display: flex !important; flex-direction: column;
    grid-column: 1 / 4; grid-row: 2;
    overflow-y: auto; padding: 8px;
  }
  #fxPanel .fx-grid { grid-template-columns: repeat(4,1fr); }
  #arpPanel {
    display: flex !important;
    grid-column: 4; grid-row: 2;
  }
}

/* ============================================================ CUSTOM SELECT (CSS dropdown) */
.cs-wrap { position: relative; display: inline-block; }
.cs-btn {
  display: flex; align-items: center; gap: 4px; justify-content: space-between;
  background: var(--bg3); border: 1px solid var(--border); color: var(--text);
  border-radius: 4px; padding: 4px 7px; font-size: 11px; font-family: var(--font-ui);
  cursor: pointer; min-width: 56px; width: 100%; transition: border-color .15s;
}
.cs-btn:hover { border-color: var(--accent); }
.cs-wrap.open .cs-btn { border-color: var(--accent); color: var(--accent); }
.cs-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cs-caret { font-size: 9px; opacity: .7; flex: none; }
.cs-list {
  display: none; position: fixed; z-index: 9000;
  background: var(--bg2); border: 1px solid var(--accent); border-radius: 5px;
  max-height: 50vh; overflow-y: auto; box-shadow: 0 6px 24px rgba(0,0,0,.5);
  padding: 3px; min-width: 90px;
}
.cs-wrap.open .cs-list { display: block; }
.cs-item { padding: 7px 10px; font-size: 12px; border-radius: 3px; cursor: pointer; white-space: nowrap; color: var(--text); }
.cs-item:hover { background: var(--bg3); color: var(--accent); }
.cs-item.sel { background: var(--accent-glow); color: var(--accent); font-weight: 600; }

/* ============================================================ PRESET NAME BUTTON */
.preset-name-btn {
  display: flex; align-items: center; gap: 5px;
  background: var(--bg3); border: 1px solid var(--border); color: var(--accent);
  border-radius: 4px; padding: 4px 10px; font-size: 12px; font-weight: 600;
  cursor: pointer; max-width: 180px; transition: border-color .15s;
}
.preset-name-btn:hover { border-color: var(--accent); }
.preset-name-btn span:first-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============================================================ OCTAVE COUNT */
.octcount { display: flex; gap: 2px; align-items: center; }
.cnt-btn {
  width: 22px; height: 22px; border: 1px solid var(--border); background: var(--bg3);
  color: var(--text-muted); border-radius: 4px; cursor: pointer; font-size: 11px; font-weight: 600;
}
.cnt-btn.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }

/* ============================================================ PERFORMANCE BAR (landscape) */
.perf-bar { display: none; }
.perf-bar {
  flex: none; height: 46px; background: var(--header-bg); border-bottom: 1px solid var(--border);
  align-items: center; gap: 8px; padding: 0 10px;
  overflow-x: auto; overflow-y: hidden; scrollbar-width: none; flex-wrap: nowrap;
}
.perf-bar::-webkit-scrollbar { display: none; }
.perf-tilt-btn { font-size: 10px !important; font-weight: 700; letter-spacing: .5px; flex: none; touch-action: none; }
.dice-icon { vertical-align: -2px; margin-right: 1px; }
.perf-tilt-btn.active { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.perf-bar .icon-btn { font-size: 16px; padding: 6px 9px; }
.perf-nav { font-size: 14px; }
.perf-preset-btn {
  background: var(--bg3); border: 1px solid var(--border); color: var(--accent);
  border-radius: 4px; padding: 6px 14px; font-size: 14px; font-weight: 700; cursor: pointer;
  width: 80px; flex: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: center;
}
.perf-spacer { flex: 1; }
.perf-oct { display: flex; align-items: center; gap: 4px; }
.perf-oct-lbl { font-size: 10px; color: var(--text-muted); text-transform: uppercase; }
.perf-toggle { display: flex; align-items: center; gap: 4px; font-size: 11px; color: var(--text-muted); text-transform: uppercase; cursor: pointer; white-space: nowrap; }
.perf-toggle input { width: 18px; height: 18px; }

/* SFZ modal */
.sfz-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.sfz-desc { font-size: 12px; line-height: 1.5; color: var(--text-muted); }
.sfz-lbl { font-size: 10px; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); }
.sfz-dur .cnt-btn { width: auto; padding: 0 12px; height: 30px; font-size: 12px; }
.sfz-gen { padding: 12px; font-size: 13px; }
.sfz-status { font-size: 11px; color: var(--accent); font-family: var(--font-mono); min-height: 16px; text-align: center; }

/* Preset row preview button */
.pm-name { flex: 1; display: flex; align-items: center; gap: 7px; background: none; border: none; color: var(--text); font-size: 13px; font-weight: 600; cursor: pointer; text-align: left; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; padding: 4px 0; }
.pm-name:hover { color: var(--accent); }
.pm-play { font-size: 9px; color: var(--accent); opacity: .6; flex: none; }
.pm-row.previewing { background: var(--accent-glow); }
.pm-row.previewing .pm-play { opacity: 1; }

/* ============================================================ RESPONSIVE — MOBILE PORTRAIT (EDIT MODE) */
@media (max-width: 700px) and (orientation: portrait) {
  :root { --header-h: 48px; --presetbar-h: 46px; --recordbar-h: 40px; --kb-h: 150px; }
  html, body { font-size: 14px; }
  .synth-main { display: block; overflow-y: auto; }
  .tab-nav { display: flex; }
  .tab-btn { padding: 11px 8px; font-size: 12px; }
  .panel { display: none !important; height: auto; overflow-y: visible; border-right: none; padding: 12px; gap: 12px; }
  .panel.active, #fxPanel.active, #arpPanel.active { display: flex !important; }
  #fxPanel.active { flex-direction: column; }
  /* Bigger controls */
  .knob-canvas { width: 60px !important; height: 60px !important; }
  .knob-wrap { width: 70px; }
  .knob-wrap.big-knob .knob-canvas { width: 84px !important; height: 84px !important; }
  .knob-label, .knob-val { font-size: 11px; }
  .slider-wrap { min-width: 56px; }
  .param-slider { width: 56px; height: 5px; }
  .param-slider::-webkit-slider-thumb { width: 16px; height: 16px; }
  .ctrl-select, .cs-btn { font-size: 13px; padding: 7px 9px; }
  input[type=checkbox] { width: 22px; height: 22px; }
  input[type=checkbox]:checked::after { top: 4px; left: 7px; width: 5px; height: 9px; }
  .filter-main-knobs { gap: 36px; padding: 16px 0; }
  .fx-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .btn { padding: 8px 12px; font-size: 12px; }
  .btn-xs { padding: 6px 9px; }
  .app-name { font-size: 17px; }
  .header-credit { display: none; }
  .viz-canvas { display: none; }
  .kb-controls { height: 40px; }
  .toggle-label { font-size: 11px; }
  /* hide perf bar in portrait */
  .perf-bar { display: none !important; }
}

/* ============================================================ RESPONSIVE — MOBILE LANDSCAPE (PERFORM MODE) */
@media (orientation: landscape) and (max-height: 520px) {
  #header, #presetBar, #playScreen, .synth-main { display: none !important; }
  .perf-bar { display: flex !important; }
  .keyboard-area { flex: 1; height: auto; }
  .kb-controls { display: none; }
  #keyboard { height: 100%; }
  .key.white { border-radius: 0 0 5px 5px; }
  /* Modals must fit the short viewport */
  .modal-overlay { padding: 8px; align-items: center; }
  .modal-box { max-height: 94vh; }
  .rec-body, .sfz-body { max-height: 84vh; overflow-y: auto; padding: 12px; gap: 9px; }
  .rec-wave { height: 44px; }
  .rec-play-btn { width: 38px; height: 38px; }
  .rec-actions .btn { padding: 9px; }
  .modal-header { padding: 8px 14px; }
  .dialog-box { padding: 16px; gap: 12px; }
  .settings-panel { width: 320px; }
}

/* ============================================================ LIGHT THEME OVERRIDES */
[data-dark="0"] .key.white { border-color: #ccc; background: #fff; }
[data-dark="0"] .key.black { background: #1a1a1a; }
[data-dark="0"] #header { border-bottom-color: var(--border); }
[data-dark="0"] select, [data-dark="0"] input { color-scheme: light; }

/* Print */
@media print { * { display: none; } }