/*
 * YTXT — YouTube Transcript Extractor
 * Neo-Brutalist Design System
 * 
 * Design Philosophy: Bold, high-contrast, purposeful asymmetry
 * with hard shadows and sharp edges. No rounded corners.
 */

/* ============================================
   CSS Variables — Design Tokens
   ============================================ */
:root {
  /* Colors — High Contrast Palette */
  --color-cream: #f5f0e8;
  --color-black: #0a0a0a;
  --color-dark: #1a1a1a;
  --color-coral: #ff6b4a;
  --color-coral-dark: #e55a3a;
  --color-yellow: #ffe14d;
  --color-purple: #8b5cf6;
  --color-gray: #6b6b6b;
  --color-light-gray: #e5e0d8;

  /* Typography */
  --font-display: "Syne", sans-serif;
  --font-mono: "Space Mono", monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;

  /* Shadows — Hard, Offset */
  --shadow-sm: 4px 4px 0 var(--color-black);
  --shadow-md: 6px 6px 0 var(--color-black);
  --shadow-lg: 10px 10px 0 var(--color-black);
  --shadow-color: 6px 6px 0 var(--color-coral);

  /* Borders */
  --border-thin: 2px solid var(--color-black);
  --border-thick: 4px solid var(--color-black);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

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

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

body {
  font-family: var(--font-mono);
  background-color: var(--color-cream);
  color: var(--color-black);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Noise texture overlay */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.03;
  z-index: 1000;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* ============================================
   Layout
   ============================================ */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg);
  position: relative;
  z-index: 1;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
  text-align: left;
  padding: var(--space-2xl) 0 var(--space-xl);
  position: relative;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  background: var(--color-yellow);
  color: var(--color-black);
  padding: var(--space-xs) var(--space-md);
  border: var(--border-thin);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
  transform: rotate(-2deg);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.title-line {
  display: block;
  font-size: clamp(2.5rem, 10vw, 5.5rem);
}

.title-line.accent {
  color: var(--color-coral);
  position: relative;
  left: var(--space-lg);
}

.hero-subtitle {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  color: var(--color-gray);
  max-width: 400px;
}

.hero-subtitle .highlight {
  color: var(--color-black);
  font-weight: 700;
  background: linear-gradient(to top, var(--color-yellow) 40%, transparent 40%);
}

/* ============================================
   Input Section
   ============================================ */
.input-section {
  margin-bottom: var(--space-xl);
}

.input-wrapper {
  background: var(--color-cream);
  border: var(--border-thick);
  padding: var(--space-lg);
  box-shadow: var(--shadow-lg);
  position: relative;
}

.input-wrapper::before {
  content: "";
  position: absolute;
  top: -8px;
  right: -8px;
  width: 40px;
  height: 40px;
  background: var(--color-coral);
  border: var(--border-thin);
}

.input-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-gray);
  margin-bottom: var(--space-md);
}

.input-group {
  display: flex;
  gap: var(--space-md);
}

.url-input {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: var(--space-md) var(--space-lg);
  border: var(--border-thick);
  background: white;
  color: var(--color-black);
  outline: none;
  transition: box-shadow var(--transition-fast);
}

.url-input::placeholder {
  color: var(--color-gray);
  opacity: 0.7;
}

.url-input:focus {
  box-shadow: var(--shadow-sm);
}

.fetch-button {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-black);
  color: var(--color-cream);
  border: var(--border-thick);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.fetch-button:hover {
  background: var(--color-coral);
  color: white;
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-sm);
}

.fetch-button:active {
  transform: translate(0, 0);
  box-shadow: none;
}

.fetch-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-icon {
  font-size: 1.25rem;
  transition: transform var(--transition-fast);
}

.fetch-button:hover .btn-icon {
  transform: translateX(4px);
}

/* Error Message */
.error-message {
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: #ffe5e5;
  border: 2px solid #ff4444;
  color: #cc0000;
  font-size: 0.875rem;
}

/* Format Selector */
.format-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.format-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-gray);
}

.format-select {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  padding: var(--space-sm) var(--space-md);
  border: var(--border-thin);
  background: white;
  color: var(--color-black);
  cursor: pointer;
  outline: none;
  transition: all var(--transition-fast);
}

.format-select:hover {
  border-color: var(--color-coral);
}

.format-select:focus {
  box-shadow: var(--shadow-sm);
}

/* ============================================
   Result Section
   ============================================ */
.result-section {
  border: var(--border-thick);
  background: white;
  box-shadow: var(--shadow-lg);
  position: relative;
  animation: slideUp 0.4s ease;
}

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

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-dark);
  border-bottom: var(--border-thick);
}

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

.result-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-cream);
}

.language-badge {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-coral);
  color: white;
  letter-spacing: 0.1em;
}

.copy-button {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-yellow);
  color: var(--color-black);
  border: 2px solid var(--color-black);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: all var(--transition-fast);
}

.copy-button:hover {
  background: var(--color-coral);
  color: white;
  transform: translate(-2px, -2px);
  box-shadow: 3px 3px 0 var(--color-cream);
}

.copy-button:active {
  transform: translate(0, 0);
  box-shadow: none;
}

.transcript-container {
  max-height: 400px;
  overflow-y: auto;
  padding: var(--space-lg);
}

.transcript-content {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.8;
  white-space: pre-wrap;
  word-wrap: break-word;
  color: var(--color-dark);
}

/* Custom Scrollbar */
.transcript-container::-webkit-scrollbar {
  width: 12px;
}

.transcript-container::-webkit-scrollbar-track {
  background: var(--color-light-gray);
  border-left: var(--border-thin);
}

.transcript-container::-webkit-scrollbar-thumb {
  background: var(--color-black);
  border: 2px solid var(--color-light-gray);
}

.transcript-container::-webkit-scrollbar-thumb:hover {
  background: var(--color-coral);
}

/* Copy Toast */
.copy-toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-black);
  color: var(--color-yellow);
  border: var(--border-thin);
  box-shadow: var(--shadow-md);
  z-index: 100;
  animation: toastIn 0.3s ease;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

/* ============================================
   Loading State
   ============================================ */
.loading-state {
  text-align: center;
  padding: var(--space-xl);
  border: var(--border-thick);
  border-style: dashed;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%,
  100% {
    border-color: var(--color-black);
  }
  50% {
    border-color: var(--color-coral);
  }
}

.loader {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.loader span {
  width: 12px;
  height: 12px;
  background: var(--color-black);
  animation: bounce 0.6s infinite alternate;
}

.loader span:nth-child(2) {
  animation-delay: 0.2s;
  background: var(--color-coral);
}

.loader span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes bounce {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-12px);
  }
}

.loading-text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-gray);
  letter-spacing: 0.05em;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-gray);
  letter-spacing: 0.05em;
}

.footer .heart {
  color: var(--color-coral);
  animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 640px) {
  .container {
    padding: var(--space-md);
  }

  .hero {
    padding: var(--space-xl) 0 var(--space-lg);
  }

  .title-line {
    font-size: clamp(2rem, 12vw, 3.5rem);
  }

  .title-line.accent {
    left: var(--space-md);
  }

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

  .fetch-button {
    justify-content: center;
  }

  .result-header {
    flex-direction: column;
    gap: var(--space-md);
    align-items: stretch;
  }

  .copy-button {
    justify-content: center;
  }
}

/* ============================================
   Selection & Focus States
   ============================================ */
::selection {
  background: var(--color-coral);
  color: white;
}

:focus-visible {
  outline: 3px solid var(--color-coral);
  outline-offset: 2px;
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
  .noise-overlay,
  .fetch-button,
  .copy-button,
  .hero-badge {
    display: none !important;
  }

  .result-section {
    box-shadow: none;
    border: 1px solid #000;
  }
}