/* ── Sapiens Design Tokens ── */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* Surfaces */
  --bg:              #07101F;
  --bg-canvas:       #050D17;
  --surface:         #0D1B32;
  --surface-solid:   #0D1B32;
  --surface-raised:  #132240;
  --surface-sunken:  #060C18;

  /* Borders */
  --border:          #1A2E4A;
  --border-strong:   #243D63;
  --border-subtle:   #0D1D32;

  /* Text */
  --text-primary:    #E8EDF5;
  --text-secondary:  #B4C4D8;
  --text-muted:      #7590AA;
  --text-subtle:     #4C6580;
  --text-disabled:   #334E65;
  --text-on-fill:    #ffffff;

  /* Brand — Saphire navy */
  --primary:         #6B91CC;
  --primary-hover:   #7BA1DA;
  --primary-active:  #4A6BAA;
  --primary-soft:    rgb(107 145 204 / 0.15);
  --primary-ring:    rgb(107 145 204 / 0.38);
  --brand:           var(--primary);
  --brand-fill:      #3A5FAA;
  --brand-fill-hover:#4A70BC;
  --brand-grad-from: #3A5FAA;
  --brand-grad-to:   #22419C;

  /* Accent — Mandarin orange (nav underline ONLY) */
  --accent:          #FF5900;
  --accent-soft:     rgb(255 89 0 / 0.12);
  --nav-underline:   #FF8240;

  /* Status */
  --success:         #34D399;
  --success-soft:    rgb(52 211 153 / 0.12);
  --warning:         #FBBF24;
  --warning-soft:    rgb(251 191 36 / 0.12);
  --danger:          #F87171;
  --danger-soft:     rgb(248 113 113 / 0.12);
  --danger-fill:     #C1443C;
  --info:            #60A5FA;
  --info-soft:       rgb(96 165 250 / 0.12);

  /* Shadows */
  --shadow-sm: 0 1px 0 rgb(255 255 255 / 0.03) inset, 0 1px 3px rgb(0 0 0 / 0.3);
  --shadow-md: 0 2px 4px rgb(0 0 0 / 0.28), 0 8px 20px rgb(0 0 0 / 0.28);
  --shadow-lg: 0 4px 8px rgb(0 0 0 / 0.35), 0 16px 40px rgb(0 0 0 / 0.42);
  --shadow-btn: 0 0 1px rgba(3,11,23,.30), 0 1px 1px rgba(3,11,23,.15);

  /* Radii */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  /* Motion */
  --duration-fast:   120ms;
  --duration:        200ms;
  --duration-slow:   320ms;
  --ease:            cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-sans: 'IBM Plex Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  /* Layout */
  --max-w:     1100px;
  --nav-h:     68px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

/* ── Navigation (Sapiens TopBar) ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface-solid);
  border-bottom: 1px solid var(--border);
  height: var(--nav-h);
}

.nav {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  height: 32px;
}

.nav-logo img {
  height: 32px;
  width: auto;
  display: block;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  position: relative;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 400;
  padding-bottom: 4px;
  transition: color var(--duration-fast) var(--ease);
}

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

/* Active nav tab — orange underline (Sapiens spec: this is the ONLY place accent is used) */
.nav-links a[style*="color: var(--color-text)"],
.nav-links a.active {
  color: var(--text-primary);
  font-weight: 500;
}

.nav-links a[style*="color: var(--color-text)"]::after,
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 1px;
  background: var(--nav-underline);
}

/* ── Hero ── */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 100px 48px 80px;
}

.hero-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.hero-heading {
  font-size: clamp(32px, 5vw, 60px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 36px;
  max-width: 800px;
}

.hero-heading em {
  font-style: normal;
  background: linear-gradient(135deg, var(--brand-grad-from), var(--brand-grad-to));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 20px;
  height: 40px;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--duration-fast) var(--ease),
              box-shadow var(--duration-fast) var(--ease),
              transform var(--duration-fast) var(--ease);
  box-shadow: var(--shadow-btn);
  cursor: pointer;
  border: none;
}

.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--brand-fill);
  color: var(--text-on-fill);
}

.btn-primary:hover { background: var(--brand-fill-hover); }

/* ── Work section ── */
.work {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 48px 80px;
}

.section-title {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--duration) var(--ease),
              border-color var(--duration) var(--ease),
              box-shadow var(--duration) var(--ease);
  cursor: pointer;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.card-thumb {
  height: 180px;
}

.card-thumb--1 { background: linear-gradient(135deg, #0A1526 0%, #3A5FAA 100%); }
.card-thumb--2 { background: linear-gradient(135deg, #1A0E00 0%, #FF5900 100%); }
.card-thumb--3 { background: linear-gradient(135deg, #0A1B32 0%, #22419C 100%); }

.card-body { padding: 16px; }

.card-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 8px;
}

.card-body h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.card-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── About ── */
.about {
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.about-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 80px 48px;
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 80px;
  align-items: start;
}

.about-text h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.about-text p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 12px;
  line-height: 1.7;
}

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

.skills-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
}

.skills-list li {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 8px 14px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 32px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-secondary);
}

.site-footer a { color: var(--primary); }
.site-footer a:hover { text-decoration: underline; }
.footer-note { color: var(--text-subtle); font-size: 12px; }

/* ── Scroll fade ── */
.fade-target { opacity: 0; transform: translateY(12px); transition: opacity var(--duration-slow) var(--ease), transform var(--duration-slow) var(--ease); }
.fade-target.visible { opacity: 1; transform: none; }

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ── Responsive ── */
@media (max-width: 720px) {
  .nav { padding: 0 20px; }
  .hero { padding: 60px 20px 48px; }
  .work { padding: 0 20px 60px; }
  .about-inner { grid-template-columns: 1fr; gap: 32px; padding: 48px 20px; }
  .site-footer { flex-direction: column; gap: 8px; text-align: center; padding: 24px 20px; }
}