/* ==========================================================================
   ShadowMAX - Modern Dark Theme CSS Design System
   ========================================================================== */

/* 1. CSS Custom Properties / Design Tokens */
:root {
  --bg-dark: #0b0c10;
  --bg-card: rgba(22, 25, 37, 0.75);
  --bg-card-border: rgba(255, 255, 255, 0.08);
  --bg-input: #12141d;
  
  --text-main: #f0f2f8;
  --text-muted: #8b92a8;
  --text-dim: #5c6275;

  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.4);
  --accent-purple: #9d4edd;
  --accent-purple-glow: rgba(157, 78, 221, 0.4);
  --accent-pink: #ff2a85;
  --accent-amber: #ffb703;
  --accent-blue: #3a86ff;

  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --space-section: 1rem;

  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.37);
  --shadow-glow: 0 0 15px var(--accent-cyan-glow);
}

/* 2. CSS Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(157, 78, 221, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(0, 240, 255, 0.1) 0%, transparent 40%);
  color: var(--text-main);
  font-family: var(--font-body);
  line-height: 1.5;
  min-height: 100vh;
  padding: 1.5rem;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 3rem);
}

/* 3. Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--bg-card-border);
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.logo .highlight {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px var(--accent-cyan-glow);
}

.badge {
  background: linear-gradient(135deg, rgba(0,240,255,0.15), rgba(157,78,221,0.15));
  border: 1px solid var(--accent-cyan-glow);
  color: var(--accent-cyan);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.tagline {
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* 4. Main Workspace Layout */
.workspace {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 1.5rem;
  flex: 1;
}

/* Card Component */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-section);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

.status-indicator {
  font-size: 0.8rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.status-indicator.active {
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
}

/* 5. Player Section */
.stage-section {
  display: flex;
  flex-direction: column;
}

.player-wrapper {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  background: #000;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--bg-card-border);
}

.player-placeholder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, #181b29 0%, #0a0b10 100%);
  color: var(--text-muted);
  text-align: center;
  padding: 1rem;
}

.placeholder-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.play-icon {
  width: 48px;
  height: 48px;
  stroke: var(--accent-cyan);
  opacity: 0.6;
}

#player {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* URL Input Controls */
.url-control-group {
  display: flex;
  gap: 0.5rem;
}

.input-field {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--bg-card-border);
  color: var(--text-main);
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-field:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan-glow);
}

/* Player status bar — sits above player, flush with card edge */
.player-status-bar {
  display: flex;
  justify-content: flex-end;
  margin: -0.4rem 0 -0.1rem;
}

/* Playback Controls — no extra background, just spacing */
.playback-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.primary-controls {
  justify-content: flex-start;
}

.main-play-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.replay-control-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn-replay-mode {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--bg-card-border);
  padding: 0.4rem 0.75rem;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-replay-mode:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.btn-replay-mode.active#btn-mode-record {
  background: rgba(255, 42, 133, 0.15);
  color: var(--accent-pink);
  border-color: var(--accent-pink);
  font-weight: 700;
  box-shadow: 0 0 10px rgba(255, 42, 133, 0.3);
}

.btn-replay-mode.active#btn-mode-replay {
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  font-weight: 700;
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

.time-display {
  font-family: monospace;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Range Slider */
.seek-bar {
  width: 100%;
  accent-color: var(--accent-cyan);
  height: 6px;
  background: #1f2333;
  border-radius: 3px;
  cursor: pointer;
}

/* Speed Buttons */
.key-viewer-controls {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.025);
}

.key-viewer-control {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) 4.25rem auto;
  align-items: center;
  gap: 0.45rem;
}

.key-viewer-control label,
.key-viewer-control span {
  color: var(--text-muted);
  font-size: 0.75rem;
  white-space: nowrap;
}

.key-viewer-control input[type="range"] {
  width: 100%;
  accent-color: var(--accent-cyan);
}

.key-viewer-control input[type="number"] {
  width: 100%;
  padding: 0.3rem 0.4rem;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  color: var(--text-main);
  font: inherit;
  font-size: 0.8rem;
}

.speed-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.control-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.speed-btn-group {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* Slow/fast sub-groups sit flush — no extra gap within them */
.speed-side {
  display: flex;
  gap: 0.25rem;
}

/* Visual separator between slow group and 1.0 anchor */
.slow-side {
  margin-right: 0.3rem;
  padding-right: 0.55rem;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

/* Visual separator between 1.0 anchor and fast group */
.fast-side {
  margin-left: 0.3rem;
  padding-left: 0.55rem;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

/* Buttons */
.btn {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff, #0099ff);
  color: #050b14;
  border: none;
}

.btn-primary:hover:not(:disabled) {
  box-shadow: 0 0 12px var(--accent-cyan-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
  border: 1px solid var(--bg-card-border);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.13);
}

/* Ghost button — minimal, for secondary destructive/reset actions */
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-ghost:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.07);
  color: var(--text-main);
}

/* ---------- Speed button base ---------- */
.btn-speed {
  /* Each button declares its own heatmap color via --sc */
  --sc: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.04);
  color: var(--sc);
  border: 1px solid color-mix(in srgb, var(--sc) 30%, transparent);
  padding: 0.28rem 0.55rem;
  font-size: 0.78rem;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.btn-speed:hover:not(:disabled) {
  background: color-mix(in srgb, var(--sc) 18%, transparent);
  color: #fff;
  border-color: color-mix(in srgb, var(--sc) 60%, transparent);
}

.btn-speed.active {
  background: color-mix(in srgb, var(--sc) 28%, transparent);
  color: #fff;
  border-color: var(--sc);
  font-weight: 700;
  box-shadow: 0 0 8px color-mix(in srgb, var(--sc) 45%, transparent);
}

/* 1.0 anchor: larger, pure white reference point */
.btn-speed-anchor {
  --sc: #ffffff;
  padding: 0.28rem 0.8rem;
  font-size: 0.85rem;
  position: relative;
}

/* ---------- Heatmap color assignments ---------- */
/* slow side: 0.5 (deep blue) → 0.95 (cyan-teal, close to neutral) */
.btn-speed[data-speed="0.5"]  { --sc: hsl(225, 80%, 68%); }
.btn-speed[data-speed="0.7"]  { --sc: hsl(212, 70%, 70%); }
.btn-speed[data-speed="0.8"]  { --sc: hsl(198, 62%, 70%); }
.btn-speed[data-speed="0.9"]  { --sc: hsl(182, 52%, 68%); }
.btn-speed[data-speed="0.95"] { --sc: hsl(162, 42%, 65%); }
/* fast side: 1.05 (warm green) → 1.5 (deep red) */
.btn-speed[data-speed="1.05"] { --sc: hsl(48,  45%, 65%); }
.btn-speed[data-speed="1.1"]  { --sc: hsl(33,  62%, 65%); }
.btn-speed[data-speed="1.2"]  { --sc: hsl(20,  72%, 62%); }
.btn-speed[data-speed="1.3"]  { --sc: hsl(8,   78%, 60%); }
.btn-speed[data-speed="1.5"]  { --sc: hsl(0,   84%, 56%); }

.btn-mode {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--bg-card-border);
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

.btn-mode.active {
  background: var(--accent-purple);
  color: #fff;
  border-color: var(--accent-purple);
  box-shadow: 0 0 10px var(--accent-purple-glow);
}

/* 6. Sidebar & Key Visualizer */
.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-section);
}

.key-display-card {
  /* no forced min-height — let content determine size */
}

/* Common Key Visualizer Grid & Column Layouts */
.key-visualizer {
  display: grid;
  gap: 0.5rem;
  padding: 0.75rem 0;
  box-sizing: border-box;
}

.key-visualizer.mode-4b { display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: auto auto; gap: 0.35rem; }
.key-visualizer.mode-5b { display: grid; grid-template-columns: repeat(10, 1fr); grid-template-rows: auto auto; gap: 0.15rem; }
.key-visualizer.mode-6b { display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: auto auto; gap: 0.3rem; }
.key-visualizer.mode-8b { display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: auto auto auto; gap: 0.25rem; }

/* Sidebar Only Key Visualizer Layout Spacing */
#key-visualizer {
  display: grid;
  gap: 0.5rem;
  padding: 0.5rem 0;
  margin-bottom: 0.5rem;
  box-sizing: border-box;
}

/* Key Visualizer Column Positioning */
.key-visualizer.mode-4b .lane-t1 { grid-column: 1; grid-row: 1; }
.key-visualizer.mode-4b .lane-t2 { grid-column: 2; grid-row: 1; }
.key-visualizer.mode-4b .lane-t3 { grid-column: 3; grid-row: 1; }
.key-visualizer.mode-4b .lane-t4 { grid-column: 4; grid-row: 1; }
.key-visualizer.mode-4b .lane-side-l { grid-column: 1 / 3; grid-row: 2; }
.key-visualizer.mode-4b .lane-side-r { grid-column: 3 / 5; grid-row: 2; }

.key-visualizer.mode-5b .lane-t1 { grid-column: 1 / 3; grid-row: 1; }
.key-visualizer.mode-5b .lane-t2 { grid-column: 3 / 5; grid-row: 1; }
.key-visualizer.mode-5b .lane-t3 { grid-column: 5 / 7; grid-row: 1; }
.key-visualizer.mode-5b .lane-t4 { grid-column: 7 / 9; grid-row: 1; }
.key-visualizer.mode-5b .lane-t5 { grid-column: 9 / 11; grid-row: 1; }
.key-visualizer.mode-5b .lane-side-l { grid-column: 1 / 6; grid-row: 2; }
.key-visualizer.mode-5b .lane-side-r { grid-column: 6 / 11; grid-row: 2; }

.key-visualizer.mode-6b .lane-t1 { grid-column: 1; grid-row: 1; }
.key-visualizer.mode-6b .lane-t2 { grid-column: 2; grid-row: 1; }
.key-visualizer.mode-6b .lane-t3 { grid-column: 3; grid-row: 1; }
.key-visualizer.mode-6b .lane-t4 { grid-column: 4; grid-row: 1; }
.key-visualizer.mode-6b .lane-t5 { grid-column: 5; grid-row: 1; }
.key-visualizer.mode-6b .lane-t6 { grid-column: 6; grid-row: 1; }
.key-visualizer.mode-6b .lane-side-l { grid-column: 1 / 4; grid-row: 2; }
.key-visualizer.mode-6b .lane-side-r { grid-column: 4 / 7; grid-row: 2; }

.key-visualizer.mode-8b .lane-t1 { grid-column: 1; grid-row: 1; }
.key-visualizer.mode-8b .lane-t2 { grid-column: 2; grid-row: 1; }
.key-visualizer.mode-8b .lane-t3 { grid-column: 3; grid-row: 1; }
.key-visualizer.mode-8b .lane-t4 { grid-column: 4; grid-row: 1; }
.key-visualizer.mode-8b .lane-t5 { grid-column: 5; grid-row: 1; }
.key-visualizer.mode-8b .lane-t6 { grid-column: 6; grid-row: 1; }
.key-visualizer.mode-8b .lane-side-l { grid-column: 1 / 4; grid-row: 2; }
.key-visualizer.mode-8b .lane-side-r { grid-column: 4 / 7; grid-row: 2; }
.key-visualizer.mode-8b .lane-trig-l { grid-column: 1 / 4; grid-row: 3; }
.key-visualizer.mode-8b .lane-trig-r { grid-column: 4 / 7; grid-row: 3; }

/* ==========================================================================
   Standalone Pure Overlay Hit Bar (100% Isolated from Sidebar CSS)
   ========================================================================== */
.overlay-hit-bar {
  display: grid;
  height: 28px;
  min-height: 28px;
  max-height: 28px;
  padding: 0;
  margin: 0.3rem 0 0 0;
  box-sizing: border-box;
  overflow: hidden;
}

.overlay-hit-bar.mode-4b { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.35rem; }
.overlay-hit-bar.mode-5b { display: grid; grid-template-columns: repeat(10, 1fr); gap: 0.15rem; }
.overlay-hit-bar.mode-6b { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0.3rem; }
.overlay-hit-bar.mode-8b { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0.25rem; }

.overlay-hit-bar.mode-5b .lane-t1 { grid-column: 1 / 3; }
.overlay-hit-bar.mode-5b .lane-t2 { grid-column: 3 / 5; }
.overlay-hit-bar.mode-5b .lane-t3 { grid-column: 5 / 7; }
.overlay-hit-bar.mode-5b .lane-t4 { grid-column: 7 / 9; }
.overlay-hit-bar.mode-5b .lane-t5 { grid-column: 9 / 11; }
.overlay-hit-bar.mode-5b .lane-side-l { grid-column: 1 / 6; }
.overlay-hit-bar.mode-5b .lane-side-r { grid-column: 6 / 11; }

.overlay-hit-bar.mode-6b .lane-side-l { grid-column: 1 / 4; }
.overlay-hit-bar.mode-6b .lane-side-r { grid-column: 4 / 7; }

.overlay-hit-bar.mode-8b .lane-side-l { grid-column: 1 / 4; }
.overlay-hit-bar.mode-8b .lane-side-r { grid-column: 4 / 7; }
.overlay-hit-bar.mode-8b .lane-trig-l { grid-column: 1 / 4; }
.overlay-hit-bar.mode-8b .lane-trig-r { grid-column: 4 / 7; }

.overlay-lane {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 28px;
  min-height: 28px;
  max-height: 28px;
}

.overlay-cell {
  width: 100%;
  height: 100%;
  background: rgba(19, 22, 34, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  transition: all 0.05s ease;
}

/* Overlay Hit Animation States */
.overlay-lane.note-white.pressed .overlay-cell {
  background: radial-gradient(ellipse at center, #ffffff 0%, #d5d1c2 45%, #635c40 100%);
  border-color: #ffffff;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.85);
}

.overlay-lane.note-blue.pressed .overlay-cell {
  background: radial-gradient(ellipse at center, rgb(154, 234, 241) 0%, #3593f5 45%, rgb(31, 110, 231) 100%);
  border-color: rgb(154, 234, 241);
  box-shadow: 0 0 12px rgba(31, 110, 231, 0.85);
}

.overlay-lane.note-side.pressed .overlay-cell {
  background: radial-gradient(ellipse at center, #a0f3ee 0%, rgb(65, 199, 192) 60%, #1e837e 100%);
  border-color: rgb(65, 199, 192);
  box-shadow: 0 0 12px rgba(65, 199, 192, 0.85);
}

.overlay-lane.note-trigger.pressed .overlay-cell,
.overlay-lane.note-red.pressed .overlay-cell {
  background: radial-gradient(ellipse at center, #ff77a8 0%, rgb(239, 0, 81) 60%, #990033 100%);
  border-color: rgb(239, 0, 81);
  box-shadow: 0 0 12px rgba(239, 0, 81, 0.85);
}

.key-visualizer.overlay-visualizer .key-cap *,
.key-visualizer.overlay-visualizer .sub-key {
  font-size: 0 !important;
  color: transparent !important;
}

/* Sub-row keycap styling (Side L/R & Trig L/R) */
.key-visualizer .lane-side-l .key-cap,
.key-visualizer .lane-side-r .key-cap,
.key-visualizer .lane-trig-l .key-cap,
.key-visualizer .lane-trig-r .key-cap {
  height: 38px;
  font-size: clamp(0.7rem, 1.8vw, 0.95rem);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-sub-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0.5rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.setting-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.setting-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 600;
}

.overlay-pos-selector {
  display: flex;
  gap: 0.35rem;
}

.btn-pos {
  flex: 1;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  border: 1px solid var(--bg-card-border);
  padding: 0.35rem 0.5rem;
  font-size: 0.78rem;
  border-radius: var(--radius-sm);
}

.btn-pos:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-main);
}

.btn-pos.active {
  background: var(--accent-cyan);
  color: #050b14;
  border-color: var(--accent-cyan);
  font-weight: 700;
  box-shadow: 0 0 10px var(--accent-cyan-glow);
}

/* ==========================================================================
   7. Key Viewer Overlay Container (Rendered over YouTube Video)
   ========================================================================== */
.key-overlay-container {
  --judgement-line-offset: 105px;
  --key-viewer-opacity: 0.6;
  position: absolute;
  top: 0;
  bottom: 0;
  height: 100%;
  width: 280px;
  max-width: 45%;
  z-index: 10;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  pointer-events: none; /* Allows video play/clicks underneath */
  padding: 0.5rem 0.5rem calc(0.5rem + var(--judgement-line-offset));
  opacity: var(--key-viewer-opacity);
  background: linear-gradient(180deg, rgba(11, 12, 16, 0.1) 0%, rgba(11, 12, 16, 0.55) 60%, rgba(11, 12, 16, 0.85) 100%);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  transition: none;
}

/* Enable pointer events in edit mode to allow key binding clicks on sidebar */
.key-visualizer.edit-mode {
  pointer-events: auto !important;
}

/* Overlay Position Modifiers */
.key-overlay-container.overlay-left {
  left: 12px;
  right: auto;
  transform: none;
}

.key-overlay-container.overlay-center {
  left: 50%;
  right: auto;
  transform: translateX(-50%);
}

.key-overlay-container.overlay-right {
  right: 12px;
  left: auto;
  transform: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#btn-toggle-viewer.active {
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* Key Viewer Waterfall Container Layouts */
.key-waterfall {
  position: relative;
  flex: 1;
  min-height: 0;
  background: rgba(5, 7, 13, 0.55);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  margin-top: 0.75rem;
  overflow: hidden;
}

.key-waterfall.mode-4b { display: grid; grid-template-columns: repeat(4, 1fr); grid-template-rows: 1fr; gap: 0.35rem; padding: 0 0.2rem; }
.key-waterfall.mode-5b { display: grid; grid-template-columns: repeat(10, 1fr); grid-template-rows: 1fr; gap: 0.15rem; padding: 0 0.2rem; }
.key-waterfall.mode-6b { display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: 1fr; gap: 0.3rem; padding: 0 0.2rem; }
.key-waterfall.mode-8b { display: grid; grid-template-columns: repeat(6, 1fr); grid-template-rows: 1fr; gap: 0.3rem; padding: 0 0.2rem; }

.waterfall-column {
  position: relative;
  height: 100%;
  border-left: 1px dashed rgba(255, 255, 255, 0.04);
  border-right: 1px dashed rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.waterfall-column.note-side {
  z-index: 1;
}

.waterfall-column.note-trigger {
  z-index: 1;
}

.waterfall-column.note-white,
.waterfall-column.note-blue,
.waterfall-column.note-red {
  z-index: 5;
}

/* Waterfall Mode Column Mapping */
.key-waterfall.mode-4b .lane-t1 { grid-column: 1; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-4b .lane-t2 { grid-column: 2; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-4b .lane-t3 { grid-column: 3; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-4b .lane-t4 { grid-column: 4; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-4b .lane-side-l { grid-column: 1 / 3; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }
.key-waterfall.mode-4b .lane-side-r { grid-column: 3 / 5; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }

.key-waterfall.mode-5b .lane-t1 { grid-column: 1 / 3; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-5b .lane-t2 { grid-column: 3 / 5; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-5b .lane-t3 { grid-column: 5 / 7; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-5b .lane-t4 { grid-column: 7 / 9; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-5b .lane-t5 { grid-column: 9 / 11; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-5b .lane-side-l { grid-column: 1 / 6; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }
.key-waterfall.mode-5b .lane-side-r { grid-column: 6 / 11; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }

.key-waterfall.mode-6b .lane-t1 { grid-column: 1; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-6b .lane-t2 { grid-column: 2; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-6b .lane-t3 { grid-column: 3; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-6b .lane-t4 { grid-column: 4; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-6b .lane-t5 { grid-column: 5; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-6b .lane-t6 { grid-column: 6; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-6b .lane-side-l { grid-column: 1 / 4; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }
.key-waterfall.mode-6b .lane-side-r { grid-column: 4 / 7; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }

.key-waterfall.mode-8b .lane-t1 { grid-column: 1; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-8b .lane-t2 { grid-column: 2; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-8b .lane-t3 { grid-column: 3; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-8b .lane-t4 { grid-column: 4; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-8b .lane-t5 { grid-column: 5; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-8b .lane-t6 { grid-column: 6; grid-row: 1; height: 100%; z-index: 5; }
.key-waterfall.mode-8b .lane-side-l { grid-column: 1 / 4; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }
.key-waterfall.mode-8b .lane-side-r { grid-column: 4 / 7; grid-row: 1; height: 100%; z-index: 1; background: rgba(65, 199, 192, 0.04); }
.key-waterfall.mode-8b .lane-trig-l { grid-column: 1 / 4; grid-row: 1; height: 100%; z-index: 1; background: rgba(239, 0, 81, 0.04); }
.key-waterfall.mode-8b .lane-trig-r { grid-column: 4 / 7; grid-row: 1; height: 100%; z-index: 1; background: rgba(239, 0, 81, 0.04); }

/* Waterfall Note Streams */
.waterfall-note {
  position: absolute;
  top: 0;
  left: 10%;
  width: 80%;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
  pointer-events: none;
}

.waterfall-note.note-white {
  background: linear-gradient(180deg, #ffffff, #8c8672);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
  z-index: 5;
}

.waterfall-note.note-blue {
  background: linear-gradient(180deg, rgb(154, 234, 241), rgb(31, 110, 231));
  box-shadow: 0 0 8px rgba(31, 110, 231, 0.8);
  z-index: 5;
}

.waterfall-note.note-side {
  background: linear-gradient(180deg, rgba(160, 243, 238, 0.85), rgba(65, 199, 192, 0.85));
  box-shadow: 0 0 8px rgba(65, 199, 192, 0.6);
  z-index: 1;
}

.waterfall-note.note-trigger,
.waterfall-note.note-red {
  background: linear-gradient(180deg, rgba(255, 119, 168, 0.85), rgba(239, 0, 81, 0.85));
  box-shadow: 0 0 8px rgba(239, 0, 81, 0.6);
  z-index: 1;
}

/* Waterfall Bottom Hitline */
.waterfall-hitline {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), #ffffff, var(--accent-cyan), transparent);
  box-shadow: 0 0 8px var(--accent-cyan-glow);
  z-index: 10;
}

.key-lane {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.key-cap {
  width: 100%;
  height: 52px;
  background: linear-gradient(180deg, #1d2130 0%, #131622 100%);
  border: 2px solid var(--bg-card-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: clamp(0.65rem, 1.5vw, 0.95rem);
  font-weight: 800;
  color: var(--text-muted);
  box-shadow: inset 0 -4px 0 rgba(0, 0, 0, 0.4);
  transition: all 0.05s ease;
  user-select: none;
  text-align: center;
}

.key-cap-split {
  display: flex;
  gap: 0.15rem;
  width: 100%;
  height: 52px;
}

.key-cap-split .key-cap.sub-key {
  flex: 1;
  height: 100%;
  padding: 0;
  font-size: clamp(0.5rem, 1.1vw, 0.75rem);
}

.key-visualizer.mode-8b .lane-trig-l .key-cap,
.key-visualizer.mode-8b .lane-trig-r .key-cap,
.key-visualizer.mode-8b .lane-side-l .key-cap,
.key-visualizer.mode-8b .lane-side-r .key-cap {
  height: 38px;
  font-size: clamp(0.7rem, 1.8vw, 0.95rem);
}

.key-label {
  font-size: 0.62rem;
  color: var(--text-dim);
  text-align: center;
  white-space: nowrap;
}

/* ==========================================================================
   DJMAX Note Specific Color Gradients & Glow Effects
   ========================================================================== */

/* 1. White Tracks (Track 1, 3, 4, 6): Center White -> Outer Grayish rgb(99,92,64) */
.key-lane.note-white .key-cap {
  border-color: rgba(255, 255, 255, 0.2);
}

.key-lane.note-white.pressed .key-cap {
  background: radial-gradient(ellipse at center, #ffffff 0%, #d5d1c2 45%, #635c40 100%);
  color: #0b0c10;
  border-color: #ffffff;
  box-shadow: 0 0 18px rgba(255, 255, 255, 0.8), inset 0 2px 0 rgba(255, 255, 255, 0.9);
  transform: translateY(3px);
}

.key-lane.note-white.pressed .key-label {
  color: #ffffff;
}

/* 2. Blue Tracks (Track 2, 5): Center Light Blue rgb(154,234,241) -> Outer Deep Blue rgb(31,110,231) */
.key-lane.note-blue .key-cap {
  border-color: rgba(31, 110, 231, 0.35);
}

.key-lane.note-blue.pressed .key-cap {
  background: radial-gradient(ellipse at center, rgb(154, 234, 241) 0%, #3593f5 45%, rgb(31, 110, 231) 100%);
  color: #050b14;
  border-color: rgb(154, 234, 241);
  box-shadow: 0 0 18px rgba(31, 110, 231, 0.85), inset 0 2px 0 rgba(255, 255, 255, 0.8);
  transform: translateY(3px);
}

.key-lane.note-blue.pressed .key-label {
  color: rgb(154, 234, 241);
}

/* 3. Side Notes (All modes): Cyan rgb(65, 199, 192) */
.key-lane.note-side .key-cap {
  border-color: rgba(65, 199, 192, 0.35);
}

.key-lane.note-side.pressed .key-cap {
  background: radial-gradient(ellipse at center, #a0f3ee 0%, rgb(65, 199, 192) 60%, #1e837e 100%);
  color: #050b14;
  border-color: rgb(65, 199, 192);
  box-shadow: 0 0 18px rgba(65, 199, 192, 0.85), inset 0 2px 0 rgba(255, 255, 255, 0.8);
  transform: translateY(3px);
}

.key-lane.note-side.pressed .key-label {
  color: rgb(65, 199, 192);
}

/* 4. Triggers & Red Notes (8B Triggers / 5B Center): Crimson rgb(239, 0, 81) */
.key-lane.note-trigger .key-cap,
.key-lane.note-red .key-cap {
  border-color: rgba(239, 0, 81, 0.35);
}

.key-lane.note-trigger.pressed .key-cap,
.key-lane.note-red.pressed .key-cap {
  background: radial-gradient(ellipse at center, #ff77a8 0%, rgb(239, 0, 81) 60%, #990033 100%);
  color: #ffffff;
  border-color: rgb(239, 0, 81);
  box-shadow: 0 0 18px rgba(239, 0, 81, 0.85), inset 0 2px 0 rgba(255, 255, 255, 0.8);
  transform: translateY(3px);
}

.key-lane.note-trigger.pressed .key-label,
.key-lane.note-red.pressed .key-label {
  color: rgb(239, 0, 81);
}

/* Key Customization Actions */
.key-edit-bar {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--bg-card-border);
}

.key-edit-buttons {
  display: flex;
  gap: 0.5rem;
}

.key-edit-hint {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  min-height: 1.2rem;
}

/* Edit mode visuals on key visualizer */
.key-visualizer.edit-mode .key-lane.editable {
  cursor: pointer;
}

.key-visualizer.edit-mode .key-lane.editable .key-cap {
  border-style: dashed;
  border-color: var(--accent-purple);
  animation: pulse-border 1.5s infinite alternate;
}

.key-visualizer.edit-mode .key-lane.editable:hover .key-cap {
  background: rgba(157, 78, 221, 0.25);
  border-color: #ffffff;
  transform: translateY(-2px);
}

.key-visualizer.edit-mode .key-lane.capturing .key-cap {
  background: var(--accent-purple) !important;
  color: #ffffff !important;
  border-color: #ffffff !important;
  box-shadow: 0 0 15px var(--accent-purple-glow) !important;
  animation: capture-blink 0.6s infinite alternate;
}

@keyframes pulse-border {
  from { border-color: rgba(157, 78, 221, 0.4); }
  to { border-color: rgba(157, 78, 221, 0.9); }
}

@keyframes capture-blink {
  from { opacity: 0.7; }
  to { opacity: 1.0; }
}

/* Video Control Hotkey Customizer UI */
.video-hotkey-settings {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: rgba(0, 0, 0, 0.2);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--bg-card-border);
  margin-bottom: 0.75rem;
}

.hotkey-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
}

.hotkey-label {
  color: var(--text-muted);
}

.btn-hotkey-chip {
  background: var(--bg-input);
  color: var(--accent-cyan);
  border: 1px dashed var(--accent-cyan);
  padding: 0.2rem 0.6rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  cursor: pointer;
  min-width: 50px;
  text-align: center;
  transition: all 0.2s ease;
}

.btn-hotkey-chip:hover {
  background: rgba(0, 240, 255, 0.15);
  box-shadow: 0 0 8px var(--accent-cyan-glow);
}

.btn-hotkey-chip.capturing {
  background: var(--accent-purple) !important;
  color: #ffffff !important;
  border-color: #ffffff !important;
  box-shadow: 0 0 12px var(--accent-purple-glow) !important;
  animation: capture-blink 0.6s infinite alternate;
}

/* Info Box */
.info-body {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.info-list {
  padding-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

/* 7. Footer */
.app-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--bg-card-border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-dim);
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  body {
    padding: 1rem;
  }
  .workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }
  
  .url-control-group {
    flex-direction: column;
  }

  .primary-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .speed-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .key-viewer-controls {
    grid-template-columns: 1fr;
  }

  .key-visualizer.mode-8b {
    gap: 0.15rem;
  }

  .key-cap {
    font-size: clamp(0.55rem, 2.5vw, 0.85rem);
  }

  .key-label {
    font-size: 0.52rem;
  }
}

/* ==========================================================================
   Video History Card
   ========================================================================== */

.history-card {
  flex-shrink: 0;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.history-body {
  padding: 0;
  overflow: hidden;
}

.history-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-height: 280px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--bg-card-border) transparent;
}

.history-list::-webkit-scrollbar {
  width: 4px;
}

.history-list::-webkit-scrollbar-thumb {
  background: var(--bg-card-border);
  border-radius: 99px;
}

.history-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: background 0.15s ease;
  border-radius: 0;
}

.history-item:last-child {
  border-bottom: none;
}

.history-item:hover {
  background: rgba(0, 240, 255, 0.05);
}

.history-item.active {
  background: rgba(0, 240, 255, 0.08);
  border-left: 2px solid var(--accent-cyan);
}

.history-play-btn {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: 1px solid rgba(0, 240, 255, 0.3);
  background: rgba(0, 240, 255, 0.08);
  border-radius: 50%;
  color: var(--accent-cyan);
  font-size: 0.65rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, box-shadow 0.15s, transform 0.1s;
  padding-left: 2px; /* optical centering for ▶ */
}

.history-play-btn:hover {
  background: rgba(0, 240, 255, 0.2);
  box-shadow: 0 0 8px var(--accent-cyan-glow);
  transform: scale(1.1);
}

.history-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.history-title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.history-date {
  font-size: 0.68rem;
  color: var(--text-dim);
}

.history-remove-btn {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 0.7rem;
  cursor: pointer;
  padding: 0.2rem 0.3rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s, background 0.15s;
  line-height: 1;
  opacity: 0;
}

.history-item:hover .history-remove-btn {
  opacity: 1;
}

.history-remove-btn:hover {
  color: var(--accent-pink);
  background: rgba(255, 42, 133, 0.1);
}

.history-empty {
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 1.25rem 0.75rem;
}

/* ==========================================================================
   Bookmarklet UI & Modal Guide (Standalone App Only)
   ========================================================================== */

/* Header Bookmarklet Action Button */
.btn-bookmarklet-header {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.18) 0%, rgba(157, 78, 221, 0.25) 100%);
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn-bookmarklet-header:hover {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
  color: #0b0c10;
  box-shadow: 0 0 20px var(--accent-cyan-glow);
  transform: translateY(-1px);
}

/* Sidebar Bookmarklet Card */
.bookmarklet-card {
  border-color: rgba(0, 240, 255, 0.2);
  background: linear-gradient(180deg, rgba(22, 25, 37, 0.85) 0%, rgba(15, 18, 28, 0.9) 100%);
}

.bookmarklet-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.highlight-code {
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.1);
  padding: 0.1rem 0.3rem;
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.75rem;
}

.bookmarklet-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0.5rem 0;
}

.drag-instruction-badge {
  font-size: 0.73rem;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px dashed rgba(0, 240, 255, 0.25);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.5rem;
  text-align: center;
  font-weight: 600;
}

/* Draggable Bookmarklet Link Capsule */
.btn-bookmarklet-drag {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, #00f0ff 0%, #7928ca 100%);
  color: #ffffff;
  font-weight: 800;
  font-size: 0.95rem;
  padding: 0.65rem 1rem;
  border-radius: 99px;
  text-decoration: none;
  text-align: center;
  box-shadow: 0 4px 16px rgba(0, 240, 255, 0.35);
  border: 2px dashed rgba(255, 255, 255, 0.6);
  cursor: grab;
  user-select: none;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.03em;
}

.btn-bookmarklet-drag:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 24px rgba(0, 240, 255, 0.5);
  border-color: #ffffff;
}

.btn-bookmarklet-drag:active {
  cursor: grabbing;
}

.btn-bookmarklet-drag.btn-lg {
  font-size: 1.1rem;
  padding: 0.85rem 1.6rem;
  max-width: 280px;
  margin: 0 auto;
}

.bookmarklet-sub-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-sm {
  padding: 0.25rem 0.5rem;
  font-size: 0.72rem;
}

.copy-toast {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  transition: opacity 0.2s;
}

.bookmarklet-tip {
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.4;
}

/* Modal Dialog */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 7, 13, 0.82);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: fadeIn 0.15s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-card {
  background: #121522;
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-lg);
  max-width: 580px;
  width: 100%;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 24px rgba(0, 240, 255, 0.15);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--bg-card-border);
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-main);
}

.btn-modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 0.2rem;
  border-radius: var(--radius-sm);
  transition: color 0.15s;
}

.btn-modal-close:hover {
  color: var(--accent-pink);
}

.modal-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-intro {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Guide Steps */
.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.guide-step {
  display: flex;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  align-items: flex-start;
}

.guide-step.highlight-step {
  background: rgba(0, 240, 255, 0.05);
  border-color: rgba(0, 240, 255, 0.35);
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.08);
}

.step-badge {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-cyan);
  color: #050b14;
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-content {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.step-content h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-main);
}

.step-content p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.modal-drag-box {
  margin-top: 0.6rem;
}

kbd {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  font-size: 0.75rem;
  font-family: monospace;
  color: var(--text-main);
  box-shadow: inset 0 -1px 0 rgba(0, 0, 0, 0.4);
}

/* Manual Copy Section */
.manual-copy-section {
  background: rgba(10, 12, 18, 0.6);
  border: 1px solid var(--bg-card-border);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.manual-copy-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.code-input {
  width: 100%;
  font-family: monospace;
  font-size: 0.72rem;
  background: #090b10;
  color: var(--text-dim);
  cursor: text;
}

.modal-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--bg-card-border);
  display: flex;
  justify-content: flex-end;
}