/* ============================================
   YouTube Tools — Shared Styles
   ============================================ */

:root {
  /* Dark theme (default) */
  --bg: #0f1117;
  --card: #1a1d27;
  --card-hover: #1f2233;
  --border: #2a2d3a;
  --text: #e8e8ed;
  --muted: #a0a5b8;
  --accent: #ff0033;
  --accent-light: #ff4466;
  --accent-glow: rgba(255, 0, 51, 0.15);
  --green: #34d673;
  --green-bg: rgba(34, 197, 94, 0.15);
  --yellow: #f0c040;
  --yellow-bg: rgba(234, 179, 8, 0.15);
  --blue: #5b9cf6;
  --blue-bg: rgba(59, 130, 246, 0.15);
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --input-bg: rgba(0, 0, 0, 0.3);
  --result-bg: rgba(0, 0, 0, 0.2);
  --btn-secondary-bg: rgba(255, 255, 255, 0.08);
  --btn-secondary-hover: rgba(255, 255, 255, 0.12);
  --toggle-bg: #2a2d3a;
  --toggle-hover: #3a3d4a;
}

/* Light theme */
[data-theme="light"] {
  --bg: #f5f6fa;
  --card: #ffffff;
  --card-hover: #f0f1f5;
  --border: #d1d5e0;
  --text: #1a1d27;
  --muted: #4a5068;
  --accent: #d4002a;
  --accent-light: #b80024;
  --accent-glow: rgba(212, 0, 42, 0.1);
  --green: #15803d;
  --green-bg: rgba(22, 163, 74, 0.1);
  --yellow: #a16207;
  --yellow-bg: rgba(161, 98, 7, 0.1);
  --blue: #2563eb;
  --blue-bg: rgba(37, 99, 235, 0.1);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --input-bg: #f0f1f5;
  --result-bg: #f0f1f5;
  --btn-secondary-bg: rgba(0, 0, 0, 0.05);
  --btn-secondary-hover: rgba(0, 0, 0, 0.08);
  --toggle-bg: #e2e4ea;
  --toggle-hover: #d1d5e0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ---- Header ---- */

.page-header {
  text-align: center;
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.page-header p {
  color: var(--muted);
  font-size: 0.95rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.85rem;
  margin-bottom: 1rem;
  transition: color 0.2s;
}

.back-link:hover { color: var(--accent-light); }

/* ---- Cards ---- */

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  transition: border-color 0.2s, background 0.2s;
}

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

.card h2 {
  font-size: 1.15rem;
  margin-bottom: 0.75rem;
}

.card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--accent-light);
}

/* ---- Tool Cards (Index Page) ---- */

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.tool-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.tool-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.tool-card .icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.tool-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.tool-card p {
  color: var(--muted);
  font-size: 0.9rem;
}

.tool-card .tag {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  background: var(--green-bg);
  color: var(--green);
}

/* ---- Form Elements ---- */

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

input[type="text"],
input[type="url"],
textarea,
select {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color 0.2s;
  outline: none;
}

input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  font-family: inherit;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover { filter: brightness(0.9); }

.btn-secondary {
  background: var(--btn-secondary-bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover { background: var(--btn-secondary-hover); }

.btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
}

.btn-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

/* ---- Results Area ---- */

.results {
  margin-top: 1.5rem;
}

.result-item {
  background: var(--result-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: border-color 0.2s;
}

.result-item:hover { border-color: var(--toggle-hover); }

.result-text {
  flex: 1;
  font-size: 0.95rem;
  word-break: break-word;
}

.result-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.char-count {
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
}

.char-count.warn { color: var(--yellow); }
.char-count.danger { color: var(--accent); }

/* ---- Tags / Badges ---- */

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-simple { background: var(--green-bg); color: var(--green); }
.badge-medium { background: var(--yellow-bg); color: var(--yellow); }
.badge-new { background: var(--accent-glow); color: var(--accent-light); }

/* ---- Toast ---- */

.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--card);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ---- Empty State ---- */

.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--muted);
}

.empty-state .icon { font-size: 3rem; margin-bottom: 0.75rem; }
.empty-state p { font-size: 0.95rem; }

/* ---- Footer ---- */

.page-footer {
  text-align: center;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.8rem;
}

.page-footer a {
  color: var(--accent-light);
  text-decoration: none;
}

.page-footer a:hover { text-decoration: underline; }

/* ---- Image Upload Zone ---- */

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  position: relative;
  overflow: hidden;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload-zone .icon { font-size: 2rem; margin-bottom: 0.5rem; }
.upload-zone p { color: var(--muted); font-size: 0.9rem; }

.upload-preview {
  max-width: 100%;
  max-height: 200px;
  border-radius: var(--radius-sm);
  margin-top: 0.75rem;
}

/* ---- Comparison Layout ---- */

.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.comparison-side {
  text-align: center;
}

.comparison-side img {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* ---- Utilities ---- */

.text-muted { color: var(--muted); }
.text-accent { color: var(--accent-light); }
.text-green { color: var(--green); }
.text-yellow { color: var(--yellow); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.hidden { display: none !important; }

/* ---- Privacy Badge ---- */

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--green-bg);
  color: var(--green);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  border: 1px solid var(--green);
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}

.privacy-badge::before {
  content: "🔒";
  font-size: 0.8rem;
}

/* ---- Tool Count Header ---- */

.tool-count {
  display: inline-block;
  background: var(--accent-glow);
  color: var(--accent-light);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  margin-bottom: 0.5rem;
}

/* ---- Theme Toggle ---- */

.theme-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--toggle-bg);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s, border-color 0.2s;
  z-index: 100;
  box-shadow: var(--shadow);
  line-height: 1;
  padding: 0;
}

.theme-toggle:hover {
  background: var(--toggle-hover);
  transform: scale(1.08);
}

.theme-toggle:active {
  transform: scale(0.95);
}

/* ---- Tip Jar ---- */

.tip-jar {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  background: #ffdd00;
  color: #000;
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s, box-shadow 0.2s;
  z-index: 90;
}

.tip-jar:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
}

.tip-jar:active { transform: scale(0.95); }
.tip-jar .tip-icon { font-size: 1.1rem; }

/* ---- Ad Slots ---- */

.ad-slot {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-align: center;
  margin: 1rem 0;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.ad-slot .ad-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.5rem;
  opacity: 0.6;
}

.ad-slot .ad-placeholder {
  font-size: 0.8rem;
  color: var(--muted);
  opacity: 0.4;
}

.ad-slot ins.adsbygoogle {
  display: block;
  width: 100%;
}

/* Hide placeholder when ad is filled */
.ad-slot ins.adsbygoogle[data-adsbygoogle-status="done"] ~ .ad-placeholder {
  display: none;
}

/* ---- Creator Resources ---- */

.resources-section {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.resources-section h2 {
  font-size: 1.1rem;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.resources-section .section-desc {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.resource-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.2s, transform 0.2s;
}

.resource-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.resource-card .res-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.resource-card .res-info h3 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.15rem;
  color: var(--text);
}

.resource-card .res-info p {
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}

.disclosure {
  font-size: 0.7rem;
  color: var(--muted);
  margin-top: 0.75rem;
  opacity: 0.6;
}

/* ---- Responsive ---- */

@media (max-width: 640px) {
  .container { padding: 1.25rem 1rem; }
  .page-header h1 { font-size: 1.4rem; }
  .tool-grid { grid-template-columns: 1fr; }
  .comparison { grid-template-columns: 1fr; }
  .result-item { flex-direction: column; align-items: flex-start; }
  .result-meta { width: 100%; justify-content: space-between; }
  .theme-toggle { top: 0.75rem; right: 0.75rem; width: 42px; height: 42px; font-size: 1.1rem; }
}