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

:root {
  --bg-primary: #0a0a0f;
  --bg-card: #0d1117;
  --bg-input: #161b22;
  --text-primary: #e6edf3;
  --text-secondary: #7d8590;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-secondary: #eab308;
  --accent-green: #22c55e;
  --border: #21262d;
  --border-hover: #388bfd;
  --radius: 8px;
  --radius-sm: 6px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

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

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

/* ===== Typography ===== */
h1, h2, h3 { font-family: var(--font-mono); font-weight: 700; }

/* ===== Layout ===== */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.header {
  text-align: center;
  padding: 48px 20px 12px;
}

.header-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.header-code .keyword { color: #c678dd; }
.header-code .string { color: var(--accent-green); }
.header-code .punct { color: var(--text-secondary); }

.header h1 {
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  line-height: 1.3;
}

.header h1 .accent { color: var(--accent); }

.header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 500px;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
}

.header p .comment { color: #6a737d; }

/* ===== Section Labels ===== */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  font-weight: 500;
}

/* ===== Screens ===== */
.screen {
  display: none;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* ===== Cards Grid ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-bottom: 40px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  text-align: left;
  font: inherit;
  color: inherit;
  outline: none;
  position: relative;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 1;
}

.card:hover::before, .card:focus-visible::before {
  opacity: 1;
}

.card:hover, .card:focus-visible {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 4px 24px rgba(59, 130, 246, 0.1);
}

.card:active { transform: translateY(-1px); }

.card-image {
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background: #0d1117;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card:hover .card-image img { transform: scale(1.04); }

.card-info {
  padding: 14px 16px;
  border-top: 1px solid var(--border);
}

.card-info h3 {
  font-size: 0.85rem;
  margin-bottom: 4px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 600;
}

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

/* ===== Form Screen ===== */
.form-container {
  max-width: 540px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.form-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.btn-back {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), color var(--transition);
  flex-shrink: 0;
  font-size: 1rem;
  font-family: var(--font-mono);
}

.btn-back:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.form-header h2 {
  font-size: 1.2rem;
  font-family: var(--font-mono);
}

.field-group {
  margin-bottom: 18px;
}

.field-group label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 6px;
  font-weight: 500;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.field-group input,
.field-group select {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.field-group select {
  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='%237d8590' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.field-group input:focus,
.field-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.field-group input.error,
.field-group select.error {
  border-color: #f85149;
  box-shadow: 0 0 0 3px rgba(248, 81, 73, 0.15);
}

.field-group input::placeholder {
  color: #484f58;
}

.btn-generate {
  width: 100%;
  padding: 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.btn-generate:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-generate:active { transform: translateY(0); }

/* ===== Result Screen ===== */
.result-container {
  max-width: 600px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.result-label {
  font-size: 0.7rem;
  color: var(--accent-secondary);
  margin-bottom: 12px;
  text-align: center;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.prompt-box {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
  line-height: 1.7;
  font-size: 0.88rem;
  font-family: var(--font-mono);
  position: relative;
  color: var(--accent-green);
}

.prompt-note {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-style: normal;
}

.prompt-note::before { content: '// '; color: #484f58; }

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn-copy {
  flex: 1;
  padding: 14px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.btn-copy:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-copy.copied {
  background: var(--accent-green);
  color: #fff;
}

.btn-new {
  flex: 1;
  padding: 14px;
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: border-color var(--transition), transform var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

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

.btn-flow {
  flex: 1 1 100%;
  padding: 14px;
  background: var(--accent-green);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-flow:hover {
  background: #34d399;
  transform: translateY(-1px);
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 32px 20px;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}

.footer p {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

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

.footer a:hover { color: var(--accent-hover); }

/* ===== Desktop (3 columns) ===== */
@media (min-width: 768px) {
  .header { padding: 56px 20px 16px; }
  .header h1 { font-size: 2rem; }

  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .card-info { padding: 16px 18px; }
  .card-info h3 { font-size: 0.9rem; }
  .card-info p { font-size: 0.8rem; }

  .result-actions { gap: 16px; }
}

/* ===== Small mobile ===== */
@media (max-width: 380px) {
  .header h1 { font-size: 1.3rem; }
  .cards-grid { gap: 10px; }
  .card-info { padding: 12px; }
  .card-info h3 { font-size: 0.8rem; }
  .card-info p { font-size: 0.7rem; }
  .result-actions { flex-direction: column; }
}