/* ── J&B Creations — Dark-first, blue accent ── */

:root {
  --color-bg: #0f1117;
  --color-bg-alt: #131620;
  --color-surface: #1a1d27;
  --color-surface-hover: #242836;
  --color-accent: #3b82f6;
  --color-accent-hover: #2563eb;
  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-tertiary: #64748b;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-strong: rgba(255, 255, 255, 0.14);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 9999px;
}

@media (prefers-color-scheme: light) {
  :root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-surface: #f1f5f9;
    --color-surface-hover: #e2e8f0;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-strong: rgba(0, 0, 0, 0.14);
  }
}

/* ── Reset ── */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

/* ── Layout ── */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

/* ── Nav ── */

nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

@media (prefers-color-scheme: light) {
  nav {
    background: rgba(255, 255, 255, 0.8);
  }
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-text);
}

/* ── Hero ── */

.hero {
  padding: 120px 0 96px;
  text-align: center;
}

.hero h1 {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  max-width: 720px;
  margin: 0 auto 24px;
}

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

.hero .tagline {
  font-size: 20px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── About ── */

.about {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-content {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.about-content h2 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.about-content p {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.about-content p:last-child {
  margin-bottom: 0;
}

/* ── Portfolio ── */

.portfolio {
  text-align: center;
}

.portfolio .section-label {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.portfolio h2 {
  font-size: 40px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 56px;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  text-align: left;
}

.portfolio-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.2s, background 0.2s;
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.portfolio-card:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface-hover);
}

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

.portfolio-card .card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.portfolio-card .card-name {
  font-size: 22px;
  font-weight: 700;
}

.portfolio-card .card-description {
  font-size: 16px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  flex: 1;
}

.portfolio-card .card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  transition: opacity 0.2s;
}

.card-link:hover {
  opacity: 0.8;
}

.status-pill {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: rgba(59, 130, 246, 0.12);
  color: var(--color-accent);
}

/* Placeholder card */
.portfolio-card.placeholder {
  border-style: dashed;
  border-color: var(--color-border);
  background: transparent;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 240px;
}

.portfolio-card.placeholder:hover {
  background: transparent;
  border-color: var(--color-border-strong);
}

.placeholder-text {
  font-size: 16px;
  color: var(--color-text-tertiary);
  font-weight: 500;
}

/* ── Footer ── */

footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copy {
  font-size: 14px;
  color: var(--color-text-tertiary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 14px;
  color: var(--color-text-tertiary);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--color-text-secondary);
}

/* ── Responsive ── */

@media (max-width: 768px) {
  section {
    padding: 72px 0;
  }

  .hero {
    padding: 80px 0 72px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero .tagline {
    font-size: 17px;
  }

  .portfolio h2 {
    font-size: 32px;
    margin-bottom: 40px;
  }

  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 32px;
  }

  .hero .tagline {
    font-size: 16px;
  }

  .nav-links {
    gap: 20px;
  }

  .nav-links a {
    font-size: 13px;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
}