/*
 * SkipWatch - Modern Minimalistic Design
 * A clean, elegant design with subtle gradients and smooth animations
 */

/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-primary-light: #818cf8;
  --color-primary-subtle: rgba(99, 102, 241, 0.08);

  --color-success: #10b981;
  --color-success-subtle: rgba(16, 185, 129, 0.1);

  --color-warning: #f59e0b;
  --color-warning-subtle: rgba(245, 158, 11, 0.1);

  --color-info: #06b6d4;
  --color-info-subtle: rgba(6, 182, 212, 0.1);

  --color-error: #ef4444;
  --color-error-subtle: rgba(239, 68, 68, 0.1);

  /* Neutrals */
  --color-bg: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  --color-text: #111827;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== Layout ===== */
.site-header {
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.9);
}

.header-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.main-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  flex-grow: 1;
  width: 100%;
}

/* ===== Logo ===== */
.logo-link {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  transition: opacity var(--transition-fast);
}

.logo-link:hover {
  opacity: 0.8;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
}

.logo-icon svg {
  width: 22px;
  height: 22px;
  color: white;
}

.logo-text-container {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-text {
  margin: 0;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.025em;
}

.logo-tagline {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* ===== Navigation ===== */
.header-nav {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.nav-link-primary {
  background: var(--color-primary);
  color: white;
  padding: var(--space-sm) var(--space-lg);
}

.nav-link-primary:hover {
  background: var(--color-primary-dark);
  color: white;
}

/* ===== Cards ===== */
.card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
}

.card-header {
  padding: var(--space-xl) var(--space-xl) 0;
}

.card-body {
  padding: var(--space-xl);
}

.card-footer {
  padding: 0 var(--space-xl) var(--space-xl);
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.page-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: 400;
  margin-bottom: var(--space-xl);
}

/* ===== Forms ===== */
.transcript-form {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  padding: var(--space-2xl);
}

.form-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.form-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-header p {
  color: var(--color-text-secondary);
  margin: 0;
}

.field {
  margin-bottom: var(--space-lg);
}

.field label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.field-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.field input[type="url"],
.field input[type="text"],
.field input[type="email"],
.field textarea {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

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

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

.field input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-bg-elevated);
  box-shadow: 0 0 0 4px var(--color-primary-subtle);
}

/* ===== Buttons ===== */
.actions {
  margin-top: var(--space-xl);
}

.btn,
input[type="submit"],
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.btn-primary,
input[type="submit"] {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.25);
}

.btn-primary:hover,
input[type="submit"]:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:active,
input[type="submit"]:active {
  transform: translateY(0);
}

.btn-secondary,
.button {
  background: var(--color-bg);
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.btn-secondary:hover,
.button:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.0625rem;
}

.btn-block {
  width: 100%;
}

/* ===== Transcript Show ===== */
.transcript-show {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
}

.transcript-header {
  padding: var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
}

.transcript-thumbnail {
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-md);
  overflow: hidden;
  max-width: 480px;
}

.transcript-thumbnail .video-thumbnail {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.transcript-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.transcript-info {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: center;
}

.info-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.info-item a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.info-item a:hover {
  text-decoration: underline;
}

/* ===== Status Badges ===== */
.state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.state-created {
  background: var(--color-warning-subtle);
  color: var(--color-warning);
}

.state-fetching,
.state-analyzing {
  background: var(--color-info-subtle);
  color: var(--color-info);
}

.state-ready,
.state-done {
  background: var(--color-success-subtle);
  color: var(--color-success);
}

.state-failed {
  background: var(--color-error-subtle);
  color: var(--color-error);
}

/* Pulse animation for loading states */
.state-fetching::before,
.state-analyzing::before,
.state-created::before {
  content: '';
  width: 8px;
  height: 8px;
  background: currentColor;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.9); }
}

/* ===== Transcript Content ===== */
.transcript-body {
  padding: var(--space-xl);
}

.transcript-body h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.transcript-body pre {
  background: var(--color-bg);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  border: 1px solid var(--color-border-light);
}

/* ===== Chapter Styling ===== */
.chapter {
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
}

.chapter:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.chapter h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.chapter h3::before {
  content: '';
  width: 4px;
  height: 1.125rem;
  background: var(--color-primary);
  border-radius: 2px;
}

.markdown-content {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.markdown-content p {
  margin: 0 0 var(--space-md);
}

.markdown-content ul,
.markdown-content ol {
  margin: 0 0 var(--space-md);
  padding-left: var(--space-lg);
}

.markdown-content li {
  margin-bottom: var(--space-sm);
}

.markdown-content strong {
  color: var(--color-text);
  font-weight: 600;
}

.markdown-content code {
  background: var(--color-bg);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.875em;
}

/* ===== Loading States ===== */
.transcript-loading,
.transcript-pending {
  padding: var(--space-3xl);
  text-align: center;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto var(--space-lg);
}

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

.loading-text {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin: 0;
}

.loading-subtext {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* ===== Error States ===== */
.error {
  background: var(--color-error-subtle);
  color: var(--color-error);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  font-size: 0.9375rem;
}

.error p {
  margin: 0;
}

/* ===== Footer Actions ===== */
.transcript-actions {
  padding: var(--space-xl);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  gap: var(--space-md);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: var(--space-3xl);
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-xl);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
}

.empty-state-icon svg {
  width: 40px;
  height: 40px;
  color: var(--color-primary);
}

.empty-state h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.empty-state p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .header-content {
    padding: var(--space-md);
    flex-direction: column;
    gap: var(--space-md);
  }

  .logo-text {
    font-size: 1.25rem;
  }

  .logo-tagline {
    display: none;
  }

  .main-content {
    padding: var(--space-lg) var(--space-md);
  }

  .transcript-form,
  .transcript-show {
    padding: var(--space-lg);
    border-radius: var(--radius-md);
  }

  .transcript-header,
  .transcript-body,
  .transcript-actions {
    padding: var(--space-lg);
  }

  .page-title {
    font-size: 1.5rem;
  }

  .transcript-info {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .transcript-thumbnail {
    max-width: 100%;
  }

  .btn-lg {
    padding: var(--space-md) var(--space-lg);
  }
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  margin-top: auto;
}

.footer-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-xl);
}

.footer-telegram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
}

.footer-telegram .icon {
  color: #229ED9;
  flex-shrink: 0;
}

.footer-telegram-text {
  text-align: center;
}

.footer-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
}

.footer-link:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .footer-content {
    padding: var(--space-md);
  }

  .footer-telegram {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .footer-telegram-text {
    font-size: 0.875rem;
  }
}

/* ===== Recent Videos Grid ===== */
.recent-videos {
  margin-top: var(--space-2xl);
}

.recent-videos h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.video-card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

.video-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.video-thumbnail {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg);
}

.video-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.video-card:hover .video-thumbnail img {
  transform: scale(1.05);
}

.video-duration {
  position: absolute;
  bottom: var(--space-sm);
  right: var(--space-sm);
  background: rgba(0, 0, 0, 0.8);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.video-info {
  padding: var(--space-md);
}

.video-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 var(--space-sm);
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.reading-time {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.reading-time svg {
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

/* ===== Icon Styles ===== */
.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.icon-sm {
  width: 16px;
  height: 16px;
}

.icon-lg {
  width: 24px;
  height: 24px;
}