/* ============================================
   AI Test Case Generator
   Theme: matches himanshukala.co.in
   ============================================ */

:root {
  --bg: #050810;
  --bg-panel: #0a0f1a;
  --bg-elevated: #0d1422;
  --border: #1a2332;
  --border-bright: #1f2d44;
  --text: #c8d4e6;
  --text-dim: #6b7a90;
  --text-bright: #ffffff;
  --accent: #00d4ff;
  --accent-dim: #0099bb;
  --accent-glow: rgba(0, 212, 255, 0.15);
  --green: #00ff88;
  --red: #ff4466;
  --warn: #ffaa33;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-display: 'Space Grotesk', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Background grid */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  position: relative;
  z-index: 1;
}

/* ============================================
   HEADER
   ============================================ */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  gap: 1.5rem;
}

.main-nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.15s;
}

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

/* ============================================
   HERO
   ============================================ */
.hero {
  text-align: center;
  margin-bottom: 3rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 255, 136, 0.08);
  border: 1px solid rgba(0, 255, 136, 0.3);
  color: var(--green);
  padding: 0.4rem 0.9rem;
  border-radius: 2px;
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
}

.status-pill .dot {
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}

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

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1rem;
}

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

.hero .tagline {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.cursor {
  color: var(--accent);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.powered {
  color: var(--text-dim);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}

/* ============================================
   API KEY BAR
   ============================================ */
.api-bar {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 1.25rem 1.5rem;
  border-radius: 4px;
  margin-bottom: 2rem;
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.05);
}

.api-bar label {
  display: block;
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.6rem;
  letter-spacing: 0.05em;
}

.api-bar .label-num {
  color: var(--text-dim);
  margin-right: 0.3rem;
}

.api-bar input {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-bright);
  padding: 0.7rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border-radius: 2px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.api-bar input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.api-bar .hint {
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-top: 0.6rem;
}

.api-bar .hint a {
  color: var(--accent);
  text-decoration: none;
}
.api-bar .hint a:hover { text-decoration: underline; }

/* ============================================
   GRID LAYOUT
   ============================================ */
.grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
}

.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem;
}

/* ============================================
   STEPS
   ============================================ */
.step {
  margin-bottom: 1.75rem;
}

.step:last-of-type { margin-bottom: 1rem; }

.step-label {
  font-size: 0.7rem;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.step-label .num {
  color: var(--accent);
  margin-right: 0.3rem;
}

.panel h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 0.9rem;
  letter-spacing: -0.01em;
}

/* Textarea */
textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-bright);
  padding: 0.8rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  border-radius: 2px;
  resize: vertical;
  min-height: 110px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea::placeholder { color: var(--text-dim); }

/* Quick fill grid */
.qf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.qf-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.7rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}

.qf-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* Checkboxes */
.check-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.5rem 0;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text);
  transition: color 0.15s;
}

.check-item:hover { color: var(--accent); }

.check-item input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1px solid var(--border-bright);
  background: var(--bg);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
  transition: all 0.15s;
}

.check-item input[type="checkbox"]:checked {
  background: var(--accent);
  border-color: var(--accent);
}

.check-item input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--bg);
  font-size: 12px;
  font-weight: 700;
}

/* Slider */
.slider-value {
  text-align: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  margin: 0.6rem 0;
  font-family: var(--font-display);
  text-shadow: 0 0 20px var(--accent-glow);
}

input[type="range"] {
  width: 100%;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-glow);
}

input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: 0 0 10px var(--accent-glow);
}

.slider-bounds {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-top: 0.4rem;
}

/* Select */
select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-bright);
  padding: 0.7rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border-radius: 2px;
  cursor: pointer;
  transition: border-color 0.15s;
}

select:focus {
  outline: none;
  border-color: var(--accent);
}

/* Generate button */
.generate-btn {
  width: 100%;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.9rem 1rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 2px;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.generate-btn:hover:not(:disabled) {
  background: var(--accent);
  color: var(--bg);
  box-shadow: 0 0 25px var(--accent-glow);
}

.generate-btn .arrow {
  transition: transform 0.2s;
}

.generate-btn:hover .arrow {
  transform: translateX(4px);
}

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

/* About box */
.about-box {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1rem 1.2rem;
  margin-top: 1.5rem;
  border-radius: 2px;
  font-size: 0.78rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.about-box .step-label {
  margin-bottom: 0.6rem;
}

.about-box strong { color: var(--text-bright); }

/* ============================================
   OUTPUT PANEL
   ============================================ */
.output-panel {
  min-height: 600px;
  display: flex;
  flex-direction: column;
}

.output-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.8rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.terminal-dots {
  display: flex;
  gap: 0.4rem;
}

.terminal-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--border-bright);
}

.terminal-dots span:nth-child(1) { background: #ff5f57; }
.terminal-dots span:nth-child(2) { background: #febc2e; }
.terminal-dots span:nth-child(3) { background: #28c840; }

#output {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.output-empty {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px dashed var(--border-bright);
  border-radius: 2px;
  color: var(--text-dim);
  padding: 3rem 1rem;
}

.output-empty .icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
  font-weight: 700;
  font-family: var(--font-display);
  opacity: 0.5;
}

.output-empty p {
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

/* Test case cards */
.tc-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 1.1rem 1.3rem;
  margin-bottom: 1rem;
  border-radius: 2px;
  font-size: 0.83rem;
  line-height: 1.7;
  transition: border-left-color 0.15s, transform 0.15s;
}

.tc-card:hover {
  border-left-color: var(--green);
  transform: translateX(2px);
}

.tc-card .tc-id {
  color: var(--accent);
  font-weight: 700;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.tc-card .tc-id .type-positive { color: var(--green); }
.tc-card .tc-id .type-negative { color: var(--red); }
.tc-card .tc-id .type-edge { color: var(--warn); }

.tc-card .tc-title {
  color: var(--text-bright);
  font-weight: 700;
  margin: 0.4rem 0 0.7rem 0;
  font-size: 0.95rem;
  font-family: var(--font-display);
}

.tc-card .tc-row { margin-top: 0.5rem; }
.tc-card .tc-row .key {
  color: var(--text-dim);
  font-weight: 700;
  margin-right: 0.4rem;
}

/* JSON output */
.json-output {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 1.2rem;
  border-radius: 2px;
  color: var(--text);
  font-size: 0.78rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  font-family: var(--font-mono);
}

/* Markdown table */
.md-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
}

.md-table th, .md-table td {
  border: 1px solid var(--border);
  padding: 0.7rem 0.8rem;
  text-align: left;
  vertical-align: top;
}

.md-table th {
  background: var(--bg);
  color: var(--accent);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.md-table td { color: var(--text); }

/* Downloads */
.downloads {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.download-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.15s;
}

.download-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Loading + error */
.loading {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
}

.loading::after {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  margin-left: 0.5rem;
  animation: pulse 1s infinite;
}

.error {
  color: var(--red);
  border: 1px solid rgba(255, 68, 102, 0.3);
  background: rgba(255, 68, 102, 0.05);
  border-left: 3px solid var(--red);
  border-radius: 2px;
  padding: 1rem 1.2rem;
  font-size: 0.85rem;
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer .logo-sm {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
  margin-right: 0.8rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 600px) {
  .container { padding: 1rem; }
  .site-header { flex-direction: column; gap: 1rem; align-items: flex-start; }
  .main-nav { gap: 1rem; }
  .hero h1 { font-size: 2rem; }
  .panel { padding: 1.2rem; }
  .qf-grid { grid-template-columns: 1fr; }
}