:root, [data-theme="dark"] {
  --ink: #0b0f17;         /* Deep Midnight Slate (Eye Comfort Dark Mode) */
  --ink-2: #111827;       /* Dark card background */
  --ink-3: #1f2937;       /* Dark hover background */
  --line: #374151;        /* Dark border */
  --text: #f3f4f6;        /* High-contrast eye comfort text */
  --muted: #9ca3af;       /* Soft slate text */
  --signal: #2563eb;      /* Vibrant Blue accent */
  --signal-hover: #1d4ed8;
  --btn-blue: #1d4ed8;    /* Royal / Dark Blue button background */
  --btn-blue-hover: #1e40af;
  --header-bg: rgba(11, 15, 23, 0.95);
  --header-shadow: rgba(0, 0, 0, 0.4);
  --card-bg: #111827;
  --card-hover: #1f2937;
  --input-bg: #0b0f17;
  --stage-bg: #0e131f;
  --red: #e0233a;
  --blue: #2563eb;
  --ok: #10b981;
  --radius: 10px;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Anton', Impact, 'Arial Narrow', sans-serif;
  --font-sinhala-display: 'Gemunu Libre', 'Anton', sans-serif;
  --font-sinhala-body: 'Abhaya Libre', 'Inter', serif;
}

[data-theme="light"] {
  --ink: #f8fafc;
  --ink-2: #ffffff;
  --ink-3: #f1f5f9;
  --line: #cbd5e1;
  --text: #0f172a;
  --muted: #64748b;
  --signal: #1d4ed8;
  --signal-hover: #1e40af;
  --btn-blue: #1d4ed8;
  --btn-blue-hover: #1e40af;
  --header-bg: rgba(255, 255, 255, 0.95);
  --header-shadow: rgba(0, 0, 0, 0.04);
  --card-bg: #ffffff;
  --card-hover: #f8fafc;
  --input-bg: #ffffff;
  --stage-bg: #f8fafc;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.2s, color 0.2s;
}

/* Header */
header {
  border-bottom: 1px solid var(--line);
  padding: 14px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  z-index: 100;
  box-shadow: 0 2px 10px var(--header-shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-badge {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--btn-blue), #1e40af);
  color: #ffffff;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: bold;
  display: grid;
  place-items: center;
  box-shadow: 0 4px 12px rgba(29, 78, 216, 0.35);
}

.brand-text h1 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 0;
  font-weight: 400;
  letter-spacing: 0.035em;
  text-transform: uppercase;
  color: var(--signal);
  line-height: 1.15;
}

.brand-text h1 span {
  color: #f59e0b; /* Golden accent */
}

.brand-text p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.header-actions {
  display: flex;
  gap: 8px;
}

/* Mode Switcher Tabs */
.mode-tabs {
  display: flex;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 5px;
  margin-bottom: 18px;
  gap: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mode-tab {
  flex: 1;
  padding: 11px 16px;
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  font-size: 13.5px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s;
  border: 1px solid transparent;
}

.mode-tab:hover {
  color: var(--text);
  background: var(--ink-3);
}

.mode-tab.active {
  background: var(--btn-blue);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(29, 78, 216, 0.35);
}

/* Layout Wrap */
.wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 480px;
  gap: 0;
  align-items: start;
  min-height: calc(100vh - 65px);
}

@media (max-width: 1040px) {
  .wrap {
    grid-template-columns: 1fr;
  }
}

/* Flow Left Section */
.flow {
  padding: 22px 22px 120px;
  max-width: 820px;
  margin: 0 auto;
  width: 100%;
}

/* Step Accordions */
.step {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.step[data-locked="1"] {
  opacity: 0.45;
  pointer-events: none;
}

.step-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  user-select: none;
  background: var(--ink-2);
  transition: background 0.15s;
}

.step-head:hover {
  background: var(--ink-3);
}

.num {
  flex: none;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--ink-3);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--muted);
  transition: all 0.2s;
}

.step[data-done="1"] .num {
  background: var(--btn-blue);
  color: #ffffff;
  border-color: var(--btn-blue);
}

.step-title {
  font-weight: 600;
  font-size: 14.5px;
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.step-sub {
  color: var(--muted);
  font-size: 12px;
  font-weight: 400;
}

.chev {
  color: var(--muted);
  font-size: 12px;
  transition: transform 0.2s;
}

.step[data-open="1"] .chev {
  transform: rotate(180deg);
}

.step-body {
  padding: 0 18px 18px;
  display: none;
  border-top: 1px solid var(--line);
}

.step[data-open="1"] .step-body {
  display: block;
}

/* Controls & Inputs */
label.lbl {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin: 10px 0 6px;
  font-weight: 600;
}

textarea, input[type=text], select {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 14px;
  font: inherit;
  font-size: 13.5px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

textarea {
  min-height: 100px;
  resize: vertical;
  line-height: 1.55;
}

textarea:focus, input[type=text]:focus, select:focus {
  border-color: var(--btn-blue);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.25);
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.row > * {
  flex: 1;
  min-width: 130px;
}

/* Buttons - Royal Dark Blue Theme */
button {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 8px;
  transition: all 0.15s;
}

.btn {
  background: var(--btn-blue);
  color: #ffffff;
  font-weight: 600;
  padding: 10px 18px;
  font-size: 13.5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(29, 78, 216, 0.3);
}

.btn:hover {
  background: var(--btn-blue-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(29, 78, 216, 0.4);
}

.btn:active {
  transform: translateY(0);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn.ghost {
  background: var(--card-bg);
  color: var(--text);
  border: 1.5px solid var(--line);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.04);
}

.btn.ghost:hover {
  background: var(--ink-3);
  border-color: var(--btn-blue);
  color: var(--signal);
}

.btn.sm {
  padding: 7px 12px;
  font-size: 12.5px;
}

/* Headline Cards */
.cards {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.card {
  text-align: left;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 12px 16px;
  color: var(--text);
  width: 100%;
  display: block;
  transition: all 0.15s;
}

.card:hover {
  border-color: var(--btn-blue);
  background: var(--card-hover);
}

.card[aria-pressed="true"] {
  border-color: var(--btn-blue);
  box-shadow: inset 0 0 0 1px var(--btn-blue), 0 4px 12px rgba(29, 78, 216, 0.2);
  background: var(--ink-3);
}

.tag {
  font-size: 10.5px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--signal);
  font-weight: 700;
  display: block;
  margin-bottom: 4px;
}

.card p {
  margin: 0;
  font-family: var(--font-sinhala-display);
  font-size: 17px;
  line-height: 1.25;
  letter-spacing: 0.005em;
  color: var(--text);
}

/* Dropzone */
.drop {
  border: 1.5px dashed var(--line);
  border-radius: 10px;
  padding: 24px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.15s;
  background: var(--input-bg);
}

.drop:hover, .drop.over {
  border-color: var(--btn-blue);
  color: var(--text);
  background: var(--ink-3);
}

.drop b {
  color: var(--signal);
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
}

/* Fine-tune Sliders */
.tune {
  display: grid;
  grid-template-columns: 80px 1fr 45px;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
  background: var(--card-bg);
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.tune label {
  font-size: 12px;
  color: var(--muted);
  margin: 0;
}

input[type=range] {
  width: 100%;
  accent-color: var(--btn-blue);
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text);
  cursor: pointer;
}

.check input {
  accent-color: var(--btn-blue);
  width: 16px;
  height: 16px;
}

/* Template Picks */
.picks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(115px, 1fr));
  gap: 10px;
}

.pick {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 8px;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: stretch;
  transition: all 0.15s;
}

.pick:hover {
  border-color: var(--btn-blue);
}

.pick[aria-pressed="true"] {
  border-color: var(--btn-blue);
  box-shadow: inset 0 0 0 1.5px var(--btn-blue);
}

.pick canvas {
  width: 100%;
  border-radius: 5px;
  display: block;
  background: var(--ink-3);
}

.pick span {
  font-size: 11px;
  color: var(--muted);
  text-align: center;
  line-height: 1.3;
}

.pick[aria-pressed="true"] span {
  color: var(--signal);
  font-weight: 600;
}

/* Sizes */
.sizes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.size {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 14px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all 0.15s;
}

.size:hover {
  border-color: var(--btn-blue);
}

.size[aria-pressed="true"] {
  border-color: var(--btn-blue);
  box-shadow: inset 0 0 0 1.5px var(--btn-blue);
  background: var(--ink-3);
}

.glyph {
  border: 2px solid var(--muted);
  border-radius: 3px;
  flex: none;
}

.size[aria-pressed="true"] .glyph {
  border-color: var(--btn-blue);
}

.size b {
  display: block;
  font-size: 13px;
}

.size small {
  color: var(--muted);
  font-size: 11px;
}

/* Right Side Preview Stage */
.stage {
  position: sticky;
  top: 65px;
  height: calc(100vh - 65px);
  border-left: 1px solid var(--line);
  background: var(--stage-bg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
}

@media (max-width: 1040px) {
  .stage {
    position: static;
    height: auto;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

.stage h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--signal);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.canvas-hold {
  background:
    linear-gradient(45deg, #161618 25%, transparent 25%, transparent 75%, #161618 75%),
    linear-gradient(45deg, #161618 25%, #0e0e10 25%, #0e0e10 75%, #161618 75%);
  background-size: 18px 18px;
  background-position: 0 0, 9px 9px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  display: grid;
  place-items: center;
  box-shadow: inset 0 2px 6px rgba(0, 0, 0, 0.4);
}

#preview {
  max-width: 100%;
  max-height: 52vh;
  display: block;
  border-radius: 4px;
  box-shadow: 0 16px 35px rgba(0, 0, 0, 0.6);
}

@media (max-width: 1040px) {
  #preview {
    max-height: 70vh;
  }
}

.stage-foot {
  display: flex;
  gap: 8px;
}

.stage-foot .btn {
  flex: 1;
}

/* Audio Panel */
.music-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card-bg);
  padding: 14px;
  margin-top: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.music-head {
  font-size: 12.5px;
  font-weight: 600;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--signal);
}

.track-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 12px;
}

.track-icon {
  width: 30px;
  height: 30px;
  border-radius: 6px;
  background: var(--btn-blue);
  color: #ffffff;
  display: grid;
  place-items: center;
  font-size: 14px;
  flex: none;
  font-weight: bold;
}

.track-alt {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 10px;
}

.mp4-choices {
  display: flex;
  gap: 8px;
  margin-top: 6px;
}

.note {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  margin: 4px 0;
}

.err {
  color: #e0233a;
  font-size: 12.5px;
  margin-top: 8px;
  line-height: 1.5;
  background: rgba(224, 35, 58, 0.12);
  border: 1px solid rgba(224, 35, 58, 0.3);
  padding: 8px 12px;
  border-radius: 6px;
}

/* Spinner */
.spin {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: sp 0.7s linear infinite;
  display: inline-block;
}

@keyframes sp {
  to { transform: rotate(360deg); }
}

:focus-visible {
  outline: 2px solid var(--btn-blue);
  outline-offset: 2px;
}