/* ============================================================
   YTScope — Styles
   ============================================================ */

/* ---------- Google Font ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* Light palette */
  --bg-primary: #f0f2f5;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.75);
  --bg-input: #f7f8fa;
  --text-primary: #1a1a2e;
  --text-secondary: #555770;
  --text-muted: #8e90a6;
  --border: rgba(0, 0, 0, 0.08);
  --border-focus: #6366f1;
  --accent: #6366f1;
  --accent-hover: #4f46e5;
  --accent-glow: rgba(99, 102, 241, 0.25);
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.2);
  --danger: #ef4444;
  --danger-hover: #dc2626;
  --progress-bg: rgba(99, 102, 241, 0.12);
  --progress-fill: linear-gradient(90deg, #6366f1, #818cf8);
  --textarea-bg: #1e1e2e;
  --textarea-text: #cdd6f4;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
}

/* ---------- Dark Mode ---------- */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: rgba(26, 26, 46, 0.8);
    --bg-input: #16162a;
    --text-primary: #e2e4f0;
    --text-secondary: #a0a3bd;
    --text-muted: #6b6e8a;
    --border: rgba(255, 255, 255, 0.06);
    --border-focus: #818cf8;
    --accent: #818cf8;
    --accent-hover: #6366f1;
    --accent-glow: rgba(129, 140, 248, 0.3);
    --progress-bg: rgba(129, 140, 248, 0.15);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  }
}

[data-theme='dark'] {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-card: rgba(26, 26, 46, 0.8);
  --bg-input: #16162a;
  --text-primary: #e2e4f0;
  --text-secondary: #a0a3bd;
  --text-muted: #6b6e8a;
  --border: rgba(255, 255, 255, 0.06);
  --border-focus: #818cf8;
  --accent: #818cf8;
  --accent-hover: #6366f1;
  --accent-glow: rgba(129, 140, 248, 0.3);
  --progress-bg: rgba(129, 140, 248, 0.15);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

/* ---------- Layout ---------- */
.app-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
}

/* ---------- Header ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
}

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

.app-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: #fff;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.app-logo h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.app-logo h1 span {
  color: var(--accent);
}

/* ---------- Theme Toggle ---------- */
.theme-toggle {
  position: relative;
  width: 52px;
  height: 28px;
  flex-shrink: 0;
}

.theme-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.theme-toggle-track {
  position: absolute;
  inset: 0;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 999px;
  cursor: pointer;
  transition: background var(--transition);
}

.theme-toggle-track::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  background: var(--accent);
  border-radius: 50%;
  transition: transform var(--transition);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
}

.theme-toggle input:checked + .theme-toggle-track::after {
  transform: translateX(24px);
}

.theme-toggle-icons {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 7px;
  font-size: 0.75rem;
  pointer-events: none;
  user-select: none;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: background var(--transition), border var(--transition), box-shadow var(--transition);
}

.card + .card {
  margin-top: 1.25rem;
}

/* ---------- Input Section ---------- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-row {
  display: flex;
  gap: 0.75rem;
}

.input-field {
  flex: 1;
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border var(--transition), box-shadow var(--transition);
}

.input-field::placeholder {
  color: var(--text-muted);
}

.input-field:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-field {
  padding: 0.75rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  cursor: pointer;
  min-width: 120px;
  transition: border var(--transition), box-shadow var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b6e8a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
}

.select-field:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 16px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-hover);
}

.btn-copy {
  padding: 0.5rem 1rem;
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--bg-input);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-copy:hover:not(:disabled) {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.btn-copy.copied {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
  box-shadow: 0 2px 8px var(--success-glow);
}

/* ---------- Progress Section ---------- */
.progress-section {
  display: none;
}

.progress-section.active {
  display: block;
}

.progress-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.progress-status {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: var(--progress-bg);
  border-radius: 999px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--progress-fill);
  border-radius: 999px;
  transition: width 0.3s ease;
  position: relative;
}

.progress-bar-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.3) 50%,
    transparent 100%
  );
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ---------- Results Section ---------- */
.results-section {
  display: none;
}

.results-section.active {
  display: block;
}

.result-block {
  margin-bottom: 1.25rem;
}

.result-block:last-child {
  margin-bottom: 0;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.result-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-count {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.result-textarea {
  width: 100%;
  min-height: 180px;
  padding: 1rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--textarea-text);
  background: var(--textarea-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  resize: vertical;
  outline: none;
  transition: border var(--transition);
}

.result-textarea:focus {
  border-color: var(--border-focus);
}

/* ---------- Error ---------- */
.error-message {
  display: none;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  color: var(--danger);
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
  margin-top: 1rem;
}

.error-message.active {
  display: block;
}

/* ---------- Footer ---------- */
.app-footer {
  text-align: center;
  margin-top: 2.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

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

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

/* ---------- Fade In Animation ---------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.4s ease forwards;
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .app-wrapper {
    padding: 1.25rem 1rem 2rem;
  }

  .app-logo h1 {
    font-size: 1.25rem;
  }

  .input-row {
    flex-direction: column;
  }

  .select-field {
    min-width: 100%;
  }

  .btn {
    width: 100%;
  }

  .result-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .progress-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
}