/* =========================================
   Death Metal English — Styles
   ========================================= */

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

:root {
  /* Colors */
  --bg-abyss: #050505;
  --bg-surface: #0d0d0d;
  --bg-elevated: #141414;
  --bg-card: #1a1a1a;
  --border-dark: #2a2a2a;
  --border-glow: #3d1111;

  --blood-deep: #6b0f0f;
  --blood: #8b1a1a;
  --blood-bright: #c41e1e;
  --blood-glow: #ff2a2a;

  --bone: #e8e0d0;
  --bone-dim: #a89e8e;
  --bone-faint: #6a6258;
  --text-muted: #555;

  --purple-dark: #2d1b4e;
  --purple-glow: #6b3fa0;

  /* Typography */
  --font-metal: 'Metal Mania', serif;
  --font-output: 'Special Elite', monospace;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --container-max: 800px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

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

/* Subtle noise texture overlay */
.bg-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
  position: relative;
  z-index: 1;
}

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

.title {
  font-family: var(--font-metal);
  font-size: clamp(2.5rem, 8vw, 4.5rem);
  color: var(--blood-bright);
  text-shadow:
    0 0 20px rgba(196, 30, 30, 0.5),
    0 0 60px rgba(196, 30, 30, 0.2),
    0 2px 4px rgba(0, 0, 0, 0.8);
  letter-spacing: 0.05em;
  line-height: 1.1;
  margin-bottom: var(--space-sm);
  white-space: nowrap;
}

.title-icon {
  display: inline-block;
  animation: headbang 1.5s ease-in-out infinite;
}

.title-icon:last-child {
  animation-delay: 0.75s;
}

@keyframes headbang {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-10deg); }
  75% { transform: rotate(10deg); }
}

.subtitle {
  font-family: var(--font-metal);
  font-size: clamp(1rem, 3vw, 1.4rem);
  color: var(--bone-dim);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.tagline {
  font-size: 0.95rem;
  color: var(--bone-faint);
  max-width: 500px;
  margin: 0 auto;
}

/* --- Panels --- */
.panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: var(--space-lg);
  transition: border-color 0.3s var(--ease-out);
}

.panel:focus-within {
  border-color: var(--blood-deep);
  box-shadow: 0 0 30px rgba(107, 15, 15, 0.15);
}

.panel-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--bone-dim);
  margin-bottom: var(--space-sm);
}

.label-icon {
  font-size: 0.9rem;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-sm);
}

/* --- Textarea --- */
.text-area {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-dark);
  border-radius: 8px;
  padding: var(--space-md);
  color: var(--bone);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  resize: vertical;
  transition: border-color 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out);
}

.text-area::placeholder {
  color: var(--bone-faint);
  font-style: italic;
}

.text-area:focus {
  outline: none;
  border-color: var(--blood);
  box-shadow: 0 0 0 3px rgba(139, 26, 26, 0.15);
}

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

/* --- Controls --- */
.controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

/* Brutality slider */
.brutality-control {
  width: 100%;
}

.brutality-label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--bone-dim);
  text-align: center;
  margin-bottom: var(--space-sm);
}

.slider-container {
  padding: 0 var(--space-sm);
}

.brutality-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(to right, var(--border-dark), var(--blood-deep), var(--blood-bright));
  outline: none;
  cursor: pointer;
}

.brutality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--blood-bright);
  border: 2px solid var(--bone);
  box-shadow: 0 0 10px rgba(196, 30, 30, 0.5);
  cursor: pointer;
  transition: transform 0.15s var(--ease-bounce), box-shadow 0.15s var(--ease-out);
}

.brutality-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 20px rgba(196, 30, 30, 0.8);
}

.brutality-slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--blood-bright);
  border: 2px solid var(--bone);
  box-shadow: 0 0 10px rgba(196, 30, 30, 0.5);
  cursor: pointer;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-sm);
}

.slider-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color 0.3s var(--ease-out);
  text-align: center;
  flex: 1;
}

.slider-label.active {
  color: var(--blood-bright);
  font-weight: 700;
}

/* Translate button */
.translate-btn {
  position: relative;
  background: linear-gradient(135deg, var(--blood-deep), var(--blood));
  color: var(--bone);
  border: 1px solid var(--blood);
  border-radius: 12px;
  padding: var(--space-md) var(--space-2xl);
  font-family: var(--font-metal);
  font-size: 1.5rem;
  letter-spacing: 0.15em;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  overflow: hidden;
  min-width: 280px;
}

.translate-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--blood), var(--blood-bright));
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}

.translate-btn:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139, 26, 26, 0.4), 0 0 40px rgba(196, 30, 30, 0.2);
}

.translate-btn:hover:not(:disabled)::before {
  opacity: 1;
}

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

.translate-btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.btn-text,
.btn-loading {
  position: relative;
  z-index: 1;
}

.btn-loading {
  display: none;
  gap: 6px;
  align-items: center;
  justify-content: center;
}

.translate-btn.loading .btn-text {
  display: none;
}

.translate-btn.loading .btn-loading {
  display: flex;
}

.loading-dot {
  width: 8px;
  height: 8px;
  background: var(--bone);
  border-radius: 50%;
  animation: loadPulse 1.2s ease-in-out infinite;
}

.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes loadPulse {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

/* --- Output --- */
.output-panel {
  min-height: 120px;
}

.output-text {
  font-family: var(--font-output);
  font-size: 1.15rem;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--bone);
  white-space: pre-wrap;
  word-break: break-word;
}

.output-text.has-content {
  color: var(--blood-bright);
  text-shadow: 0 0 20px rgba(196, 30, 30, 0.15);
  animation: revealText 0.5s var(--ease-out);
}

.output-placeholder {
  color: var(--bone-faint);
  font-style: italic;
  font-family: var(--font-body);
  font-size: 0.95rem;
}

@keyframes revealText {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Copy button */
.copy-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--bg-elevated);
  border: 1px solid var(--border-dark);
  border-radius: 6px;
  padding: var(--space-xs) var(--space-sm);
  color: var(--bone-dim);
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
}

.copy-btn:hover {
  border-color: var(--blood-deep);
  color: var(--bone);
  background: var(--bg-card);
}

.copy-btn.copied {
  border-color: #1a6b1a;
  color: #4ade80;
}

.copy-icon {
  font-size: 0.85rem;
}

/* --- Examples --- */
.examples-section {
  margin-top: var(--space-2xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-dark);
}

.section-title {
  font-family: var(--font-metal);
  font-size: 1.8rem;
  color: var(--blood);
  text-align: center;
  margin-bottom: var(--space-xs);
  text-shadow: 0 0 20px rgba(139, 26, 26, 0.3);
}

.section-subtitle {
  text-align: center;
  font-size: 0.85rem;
  color: var(--bone-faint);
  margin-bottom: var(--space-xl);
}

.examples-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.example-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  padding: var(--space-lg);
  transition: border-color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}

.example-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.example-normal {
  font-size: 0.9rem;
  color: var(--bone-dim);
  margin-bottom: var(--space-sm);
  font-style: italic;
}

.example-normal::before {
  content: '✍ ';
  opacity: 0.5;
}

.example-arrow {
  color: var(--blood);
  font-size: 0.8rem;
  margin-bottom: var(--space-sm);
  letter-spacing: 0.2em;
}

.example-dm {
  font-family: var(--font-output);
  font-size: 0.95rem;
  color: var(--blood-bright);
  line-height: 1.7;
  letter-spacing: 0.03em;
  text-shadow: 0 0 15px rgba(196, 30, 30, 0.1);
}

/* --- Footer --- */
.footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-dark);
  text-align: center;
  font-size: 0.8rem;
  color: var(--bone-faint);
}

.footer a {
  color: var(--blood);
  text-decoration: none;
  transition: color 0.2s;
}

.footer a:hover {
  color: var(--blood-bright);
  text-decoration: underline;
}

.footer-sub {
  margin-top: var(--space-xs);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* --- Error toast --- */
.error-toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-elevated);
  border: 1px solid var(--blood-deep);
  border-radius: 10px;
  padding: var(--space-md) var(--space-lg);
  color: var(--bone);
  font-size: 0.9rem;
  z-index: 100;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  transition: transform 0.4s var(--ease-bounce);
  max-width: 90%;
}

.error-toast.visible {
  transform: translateX(-50%) translateY(0);
}

/* --- Loading message --- */
.loading-message {
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.85rem;
  color: var(--bone-faint);
  animation: loadFade 2s ease-in-out infinite;
}

@keyframes loadFade {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .container {
    padding: var(--space-lg) var(--space-md);
  }

  .translate-btn {
    width: 100%;
    min-width: 0;
  }

  .slider-label {
    font-size: 0.6rem;
  }

  .output-text {
    font-size: 1rem;
  }

  .title {
    white-space: normal;
  }
}