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

:root {
  --bg:         #0d0d0d;
  --surface:    #161616;
  --surface-2:  #1f1f1f;
  --border:     #2a2a2a;
  --accent:     #6ee7b7;
  --accent-2:   #818cf8;
  --text:       #e5e5e5;
  --muted:      #737373;
  --radius:     8px;
  --max-width:  1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

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

/* ===== Layout ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Header ===== */
header {
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(8px);
  z-index: 100;
}

header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.site-title span { color: var(--accent); }

nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.9rem;
}

nav a { color: var(--muted); }
nav a:hover { color: var(--text); text-decoration: none; }

/* ===== Hero ===== */
.hero {
  padding: 5rem 0 3.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}

.hero h1 .highlight {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  max-width: 640px;
  margin: 0 auto 2rem;
  color: var(--muted);
  font-size: 1.1rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; text-decoration: none; }

.btn-primary {
  background: var(--accent);
  color: #000;
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

/* ===== Section ===== */
section {
  padding: 3rem 0;
}

section + section {
  border-top: 1px solid var(--border);
}

.section-header {
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.section-header p {
  color: var(--muted);
}

/* ===== Comparison Cards ===== */
.comparisons {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.comparison-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.comparison-block-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.comparison-block-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.prompt-label {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.15rem 0.5rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.prompt-text {
  font-size: 0.95rem;
  color: var(--text);
  font-style: italic;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1px;
  background: var(--border);
}

.video-card {
  background: var(--surface);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.video-embed {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: 4px;
  background: #000;
}

.video-embed iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-placeholder {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 1.1rem;
  font-weight: 600;
  background: var(--surface-2);
  border: 1px dashed var(--border);
  border-radius: 4px;
}

.video-meta {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.video-meta .model {
  font-weight: 700;
  font-size: 0.95rem;
}

.tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--muted);
  margin-right: 0.3rem;
}

.tag.software  { border-color: #3b4cca; color: var(--accent-2); }
.tag.model-tag { border-color: #065f46; color: var(--accent); }

.video-meta .desc {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ===== How It Works ===== */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}

.step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: #000;
  font-weight: 800;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.step h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.step p {
  font-size: 0.875rem;
  color: var(--muted);
}

/* ===== Contribute CTA ===== */
.cta-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  text-align: center;
}

.cta-box h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.cta-box p {
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 1.5rem;
}

/* ===== Footer ===== */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

footer a { color: var(--muted); }
footer a:hover { color: var(--text); text-decoration: none; }

/* ===== Responsive ===== */
@media (max-width: 600px) {
  .video-grid {
    grid-template-columns: 1fr;
  }

  nav { display: none; }
}