/* ============================================================
   Brad Guider — Portfolio Site Styles
   Dark theme, responsive, mobile-first
   ============================================================ */

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

:root {
  /* Palette */
  --bg-primary:   #0a0a0f;
  --bg-secondary: #11111a;
  --bg-card:      #16161f;
  --bg-card-hover:#1c1c28;
  --border:       rgba(255,255,255,0.08);
  --border-hover: rgba(79,142,247,0.5);

  --text-primary:   #f0f0f5;
  --text-secondary: #9090a8;
  --text-muted:     #5a5a72;

  --accent:       #4f8ef7;
  --accent-dark:  #3a74e0;
  --accent-glow:  rgba(79,142,247,0.15);

  --green:  #22c55e;
  --purple: #a855f7;
  --orange: #f97316;
  --teal:   #14b8a6;
  --pink:   #ec4899;
  --red:    #ef4444;
  --yellow: #eab308;

  /* Typography */
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 12px;
  --radius-lg: 20px;

  /* Spacing (8px increments) */
  --section-py: 5.5rem; /* 88px desktop */

  /* Transitions */
  --trans: 0.2s ease;
  --trans-slow: 0.35s ease;
}

/* ── Light theme overrides ───────────────────────────────── */
:root[data-theme="light"] {
  --bg-primary:   #f7f8fc;
  --bg-secondary: #eef0f7;
  --bg-card:      #ffffff;
  --bg-card-hover:#f1f4fb;

  --border:       rgba(15, 23, 42, 0.10);
  --border-hover: rgba(37, 99, 235, 0.45);

  --text-primary:   #0b1220;
  --text-secondary: #334155;
  --text-muted:     #64748b;

  --accent:       #2563eb;
  --accent-dark:  #1d4ed8;
  --accent-glow:  rgba(37, 99, 235, 0.12);
}

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

body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--trans);
}
a:hover { color: #fff; }

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

ul { list-style: none; }

/* ── Utility ──────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

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

/* ── Navigation ───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0.875rem 0;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--trans-slow), background var(--trans-slow);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  background: rgba(10, 10, 15, 0.96);
}

.nav-inner {
  max-width: 1200px;
  min-height: 64px;
  margin: 0 auto;
  padding: 0 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
  text-decoration: none;
  flex-shrink: 0;
  line-height: 1;
}

.nav-brand-icon {
  display: block;              /* removes inline baseline behavior */
  overflow: visible;
  width: 22px;
  height: 26px;
  flex-shrink: 0;
  transform: translateY(1px);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-links > a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.375rem 0.75rem;
  border-radius: 8px;
  transition: color var(--trans), background var(--trans);
}
.nav-links > a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}

/* Secondary controls: theme + GitHub, visually quieter */
.nav-secondary {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 0.5rem;
  padding-left: 0.75rem;
  border-left: 1px solid var(--border);
}

.nav-github {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.375rem 0.625rem;
  border-radius: 8px;
  transition: color var(--trans), background var(--trans);
}
.nav-github:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}
.nav-github .btn-icon {
  width: 1rem;
  height: 1rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px; /* 44px touch target with 22px bars + padding */
  min-width: 44px;
  min-height: 44px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--trans), opacity var(--trans);
}

/* ── Theme switcher ──────────────────────────────────────── */
.theme-label {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.theme-select {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 8px;
  padding: 0.3rem 0.5rem;
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  transition: border-color var(--trans), background var(--trans), color var(--trans);
}

.theme-select:hover {
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

:root[data-theme="light"] .nav {
  background: rgba(247, 248, 252, 0.85);
}

:root[data-theme="light"] .nav.scrolled {
  background: rgba(247, 248, 252, 0.96);
}

:root[data-theme="light"] a:hover {
  color: var(--text-primary);
}

:root[data-theme="light"] .nav-links > a:hover,
:root[data-theme="light"] .nav-github:hover {
  background: rgba(15, 23, 42, 0.06);
  color: var(--text-primary);
}

:root[data-theme="light"] .nav-brand-icon [fill="#0a1426"] {
  fill: #dce7fb;
}

:root[data-theme="light"] .theme-select {
  background: rgba(15, 23, 42, 0.05);
  border-color: rgba(15, 23, 42, 0.12);
}

:root[data-theme="light"] .theme-select:hover {
  border-color: rgba(15, 23, 42, 0.22);
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--trans);
  text-decoration: none;
  white-space: nowrap;
}

.btn-sm {
  padding: 0.4rem 0.875rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
}

.btn-secondary {
  background: rgba(255,255,255,0.07);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.2);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid currentColor;
}
.btn-outline:hover {
  background: var(--accent-glow);
  color: var(--accent);
}

.btn-icon {
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

/* ── Section layout ──────────────────────────────────────── */
.section {
  padding: var(--section-py) 0;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  margin-bottom: 3rem;
  text-align: left;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1.15;
  max-width: 22ch;
}

.section-desc {
  margin-top: 0.875rem;
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 62ch;
}

/* ── Hero ────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  padding: calc(64px + 3rem) 0 3rem; /* clear the fixed nav */
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,142,247,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,142,247,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 80% at 20% 0%, black 25%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 20% 0%, black 25%, transparent 100%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.hero-main {
  max-width: 640px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero-heading {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 1.25rem;
  max-width: 17ch;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 58ch;
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.875rem;
}

.hero-github-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.5rem 0.25rem;
}
.hero-github-link:hover { color: var(--text-primary); }

/* "Currently building" panel */
.hero-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}

.hero-panel-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.hero-panel-list {
  display: flex;
  flex-direction: column;
}

.hero-panel-item {
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
}
.hero-panel-item:first-child {
  border-top: 0;
  padding-top: 0;
}
.hero-panel-item:last-child {
  padding-bottom: 0;
}

.hero-panel-item-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.25rem;
}

.hero-panel-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}
.hero-panel-name:hover { color: var(--accent); }

.hero-panel-status {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
}

.hero-panel-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Capability strip */
.capability-strip {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0;
  margin-top: 2rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.capability-strip li {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
}
.capability-strip li + li::before {
  content: '·';
  margin: 0 0.75rem;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ── Projects ────────────────────────────────────────────── */
.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--trans-slow), box-shadow var(--trans-slow);
  overflow: hidden;
}
.project-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 8px 28px rgba(79,142,247,0.08);
}

.project-card.featured {
  border-color: rgba(79,142,247,0.2);
}

.project-card-inner {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100%;
}

.project-head {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

/* Status shown as text (not color alone) */
.project-status {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.project-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.project-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.project-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.project-role,
.project-proof {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-secondary);
  padding-left: 0.875rem;
  border-left: 2px solid var(--border);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}

/* Tech badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.65rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-python    { background: rgba(59,130,246,0.15); color: #60a5fa; border: 1px solid rgba(59,130,246,0.25); }
.badge-ts        { background: rgba(56,189,248,0.12); color: #38bdf8; border: 1px solid rgba(56,189,248,0.25); }
.badge-js        { background: rgba(234,179,8,0.12);  color: #eab308; border: 1px solid rgba(234,179,8,0.25); }
.badge-react     { background: rgba(20,184,166,0.12); color: #2dd4bf; border: 1px solid rgba(20,184,166,0.25); }
.badge-db        { background: rgba(99,102,241,0.12); color: #a78bfa; border: 1px solid rgba(99,102,241,0.25); }
.badge-docker    { background: rgba(6,182,212,0.12);  color: #22d3ee; border: 1px solid rgba(6,182,212,0.25); }
.badge-playwright{ background: rgba(34,197,94,0.12);  color: #4ade80; border: 1px solid rgba(34,197,94,0.25); }
.badge-actions   { background: rgba(168,85,247,0.12); color: #c084fc; border: 1px solid rgba(168,85,247,0.25); }
.badge-azure     { background: rgba(14,165,233,0.12); color: #38bdf8; border: 1px solid rgba(14,165,233,0.25); }
.badge-html      { background: rgba(249,115,22,0.12); color: #fb923c; border: 1px solid rgba(249,115,22,0.25); }
.badge-css       { background: rgba(236,72,153,0.12); color: #f472b6; border: 1px solid rgba(236,72,153,0.25); }
.badge-generic   { background: rgba(148,163,184,0.1); color: #94a3b8; border: 1px solid rgba(148,163,184,0.2); }

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.25rem;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.4rem 0.875rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  transition: all var(--trans);
}
.project-link svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}
.project-link:hover {
  color: var(--text-primary);
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
}

.project-link-demo {
  color: var(--accent);
  border-color: rgba(79,142,247,0.3);
  background: rgba(79,142,247,0.07);
}
.project-link-demo:hover {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ── Capabilities / approach ─────────────────────────────── */
.capabilities-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

.capabilities-approach .section-title {
  margin-bottom: 1.5rem;
}

.capabilities-approach p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
  max-width: 60ch;
}
.capabilities-approach p:last-child { margin-bottom: 0; }
.capabilities-approach strong { color: var(--text-primary); }

.capabilities-groups {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.capability-group {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--trans);
}
.capability-group:hover {
  border-color: var(--border-hover);
}

.capability-group-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.capability-list li {
  color: var(--text-secondary);
  font-size: 0.88rem;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.6;
}
.capability-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
  top: 1px;
}

/* ── Open Source ─────────────────────────────────────────── */
.repo-featured {
  background: var(--bg-card);
  border: 1px solid rgba(79,142,247,0.25);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: border-color var(--trans-slow);
}
/* Subtle static top accent line (no animated sheen) */
.repo-featured::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(79,142,247,0.3) 100%);
}
.repo-featured:hover {
  border-color: rgba(79,142,247,0.5);
}

.repo-featured-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin: 0.25rem 0 0.65rem;
}

.repo-featured-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
  max-width: 72ch;
}

.repo-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.repo-row {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: border-color var(--trans);
}
.repo-row:hover {
  border-color: var(--border-hover);
}

.repo-row-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  margin-bottom: 0.375rem;
}

.repo-row-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 0.875rem;
  max-width: 72ch;
}

.repo-row .project-tech {
  margin-top: 0;
}

.repo-row-links {
  flex-shrink: 0;
  padding-top: 0;
}

/* ── Independent product band ────────────────────────────── */
.product-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.product-band .section-title {
  margin-bottom: 1rem;
}

.product-desc {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.75;
  max-width: 62ch;
  margin-bottom: 1rem;
}
.product-desc strong { color: var(--text-primary); }

.product-role {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 62ch;
}

.product-band-side {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: flex-start;
}
.product-band-side .project-tech {
  margin-top: 0;
}

/* ── Services ────────────────────────────────────────────── */
.service-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.service-list li {
  color: var(--text-secondary);
  font-size: 0.88rem;
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.5;
}
.service-list li::before {
  content: '▹';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.8rem;
  top: 1px;
}

.service-card .project-links {
  margin-top: auto;
}

/* ── About ───────────────────────────────────────────────── */
.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
  max-width: 66ch;
}
.about-text p:last-child { margin-bottom: 0; }
.about-text strong { color: var(--text-primary); }

.about-principles-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.principles-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.principle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.principle-name {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.principle-desc {
  display: block;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ── Contact callout ─────────────────────────────────────── */
.contact-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid rgba(79,142,247,0.25);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.contact-panel .section-title {
  margin-bottom: 0.875rem;
}

.contact-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 56ch;
}

.contact-panel-actions {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  align-items: flex-start;
}

.contact-email {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  user-select: text;
  padding: 0.25rem 0;
}
.contact-email:hover { color: var(--text-primary); }

/* ── Footer ──────────────────────────────────────────────── */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.footer-logo {
  width: 48px;
  height: 48px;
  background: var(--accent);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.875rem;
}

.footer-tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 300px;
  line-height: 1.5;
}

.footer-heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: color var(--trans);
}
.footer-links a:hover { color: var(--text-primary); }
.footer-links a svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  text-align: center;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ── Responsive ──────────────────────────────────────────── */

/* Small phones: full-width stacked CTAs */
@media (max-width: 479px) {
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-ctas .btn {
    width: 100%;
  }
  .hero-github-link {
    text-align: center;
    padding: 0.75rem 0.25rem;
  }
  .capability-strip li + li::before {
    margin: 0 0.5rem;
  }
}

/* 640px+: two-column grids */
@media (min-width: 640px) {
  .projects-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .capabilities-groups {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 900px+: hero becomes two columns */
@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
  }

  .hero-panel {
    margin-top: 0.5rem;
  }

  .capabilities-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    gap: 4rem;
  }

  .about-content {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 4rem;
  }

  .product-band {
    grid-template-columns: minmax(0, 1.8fr) minmax(0, 1fr);
    padding: 2.5rem;
  }

  .contact-panel {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    padding: 2.5rem;
  }

  .repo-row {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
    gap: 2rem;
  }

  .repo-row-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }
  .repo-row-links .project-link {
    justify-content: center;
    white-space: nowrap;
  }
}

/* 1100px+: Selected Work goes three-up */
@media (min-width: 1100px) {
  .selected-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Mobile nav (below 768px) */
@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.25rem 1.25rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links > a {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 44px;
    padding: 0.6rem 0.75rem;
  }

  .nav-secondary {
    margin-left: 0;
    padding-left: 0.75rem;
    padding-top: 0.75rem;
    margin-top: 0.5rem;
    border-left: 0;
    border-top: 1px solid var(--border);
  }

  .nav-github {
    min-height: 44px;
  }

  .theme-select {
    min-height: 44px;
  }

  :root[data-theme="light"] .nav-links {
    background: rgba(247, 248, 252, 0.98);
  }
}

/* ── Light theme: component overrides ───────────────────── */
:root[data-theme="light"] .btn-secondary {
  background: rgba(15, 23, 42, 0.05);
  color: var(--text-primary);
  border-color: rgba(15, 23, 42, 0.12);
}
:root[data-theme="light"] .btn-secondary:hover {
  background: rgba(15, 23, 42, 0.10);
  border-color: rgba(15, 23, 42, 0.22);
  color: var(--text-primary);
}

:root[data-theme="light"] .project-link {
  background: rgba(15, 23, 42, 0.04);
  border-color: rgba(15, 23, 42, 0.12);
}
:root[data-theme="light"] .project-link:hover {
  background: rgba(15, 23, 42, 0.08);
  border-color: rgba(15, 23, 42, 0.20);
  color: var(--text-primary);
}

:root[data-theme="light"] .project-link-demo {
  color: var(--accent);
  border-color: rgba(37, 99, 235, 0.35);
  background: rgba(37, 99, 235, 0.07);
}
:root[data-theme="light"] .project-link-demo:hover {
  color: #fff;
  background: var(--accent);
  border-color: var(--accent);
}

/* ── Scroll progress bar ─────────────────────────────────── */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, var(--accent), var(--accent-dark));
  transform-origin: left center;
  transform: scaleX(0);
  z-index: 200;
  transition: transform 0.1s linear;
}

/* ── Skip link (a11y) ────────────────────────────────────── */
.skip-link {
  position: fixed;
  top: 0; left: 0;
  padding: 0.625rem 1.25rem;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 0 0 8px 0;
  z-index: 300;
  transform: translateY(-100%);
  transition: transform var(--trans);
}
.skip-link:focus {
  transform: translateY(0);
  color: #fff;
}

/* ── Back-to-top button ──────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: 1.75rem;
  right: 1.75rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(79, 142, 247, 0.35);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--trans-slow), transform var(--trans-slow), background var(--trans), box-shadow var(--trans);
  z-index: 150;
}
.back-to-top:not([hidden]) {
  opacity: 1;
  transform: translateY(0);
}
.back-to-top[hidden] {
  display: flex; /* override UA hidden so transitions work */
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}
.back-to-top:hover {
  background: var(--accent-dark);
  box-shadow: 0 6px 24px rgba(79, 142, 247, 0.45);
}
.back-to-top svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ── Scroll-spy active nav link ──────────────────────────── */
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.07);
}
:root[data-theme="light"] .nav-links a.active {
  background: rgba(15, 23, 42, 0.06);
}

/* ── Focus visible (a11y) ────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ── Reduced-motion support ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  #scroll-progress {
    transition: none;
  }
}

/* Curated portfolio: readable stories, real product views, restrained movement. */
:root { --text-secondary: #a3a3b8; --text-muted: #8b8ba3; }
:root[data-theme="light"] { --text-secondary: #334155; --text-muted: #64748b; }
main section[id], main article[id] { scroll-margin-top: 100px; }
.nav-links > a[aria-current="page"] { color: var(--accent); }
.home-work { padding-top: 2.5rem; }
.section-heading-row { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 2.25rem; }
.section-heading-row > .text-link { flex-shrink: 0; }
.text-link { display: inline-flex; align-items: center; gap: .45rem; font-weight: 600; font-size: .9rem; }
.eyebrow { color: var(--text-muted); font-size: .7rem; font-weight: 600; letter-spacing: .09em; text-transform: uppercase; margin-bottom: .75rem; }
.project-preview-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; }
.project-preview { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-card); display: flex; flex-direction: column; }
.preview-media { display: block; aspect-ratio: 1.5; background: var(--bg-secondary); overflow: hidden; border-bottom: 1px solid var(--border); }
.preview-media img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.preview-body { padding: 1.5rem; display: flex; flex-direction: column; flex: 1; }
.preview-body h3 { font-size: 1.3rem; letter-spacing: -.025em; line-height: 1.25; margin-bottom: .75rem; }
.preview-body > p:not(.eyebrow) { font-size: .92rem; line-height: 1.65; color: var(--text-secondary); margin-bottom: 1.25rem; }
.preview-body .text-link { margin-top: auto; }
.qagent-preview { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 1.2rem; color: var(--text-primary); }
.qagent-preview:hover { color: var(--text-primary); }
.workflow-caption { font-size: .62rem; letter-spacing: .08em; text-transform: uppercase; color: var(--text-muted); margin-bottom: .65rem; }
.workflow-step { border: 1px solid var(--border); background: var(--bg-card); border-radius: 5px; width: 80%; padding: .3rem .5rem; font-size: .78rem; text-align: center; }
.workflow-connector { color: var(--accent); font-size: .8rem; line-height: 1.2; }
.methodology-note { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 2rem; justify-content: space-between; }
.methodology-note p { max-width: 77ch; color: var(--text-secondary); font-size: .92rem; }
.methodology-note strong { color: var(--text-primary); }
.methodology-note .text-link { flex-shrink: 0; }
.evidence-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.evidence-intro p { color: var(--text-secondary); margin-bottom: 1.5rem; }
.footer-social { margin-top: 1rem; }
.page-intro { padding: 9rem 0 3rem; border-bottom: 1px solid var(--border); }
.page-intro h1 { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1.08; letter-spacing: -.045em; margin-bottom: 1.4rem; }
.page-lead { font-size: clamp(1.15rem, 2vw, 1.5rem); line-height: 1.5; max-width: 48ch; color: var(--text-secondary); }
.intro-note { margin-top: 1rem; color: var(--text-muted); font-size: .92rem; }
.work-index { margin-top: 2.5rem; display: flex; flex-wrap: wrap; gap: .5rem 2rem; font-size: .85rem; }
.work-index a { padding: .5rem 0; }
.portfolio-section { padding-bottom: 3rem; }
.work-story { display: grid; grid-template-columns: 1fr 1fr; gap: 3.5rem; align-items: start; padding: 2.5rem 0 3.5rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
.work-story:last-child { border-bottom: none; margin-bottom: 0; }
.story-copy h3 { font-size: clamp(1.8rem, 3vw, 2.25rem); letter-spacing: -.035em; line-height: 1.15; margin-bottom: 1rem; }
.story-deck { font-size: 1.2rem; line-height: 1.5; margin-bottom: 1rem; color: var(--text-primary); }
.story-copy > p:not(.eyebrow):not(.story-deck), .methodology-layout p:not(.story-deck):not(.section-label) { color: var(--text-secondary); font-size: .95rem; line-height: 1.75; }
.story-facts { margin: 1.5rem 0; }
.story-facts > div { margin-bottom: 1rem; }
.story-facts dt { font-size: .75rem; font-weight: 700; margin-bottom: .25rem; color: var(--text-primary); }
.story-facts dd { font-size: .9rem; color: var(--text-secondary); }
.story-links { display: flex; flex-wrap: wrap; gap: .65rem 1.5rem; margin-top: 1.5rem; font-size: .85rem; font-weight: 600; }
.project-figure { margin-top: .5rem; }
.project-figure img { width: 100%; height: auto; border-radius: 8px; border: 1px solid var(--border); }
.project-figure figcaption, .panel-caption { font-size: .7rem; line-height: 1.5; margin-top: .75rem; color: var(--text-muted); }
.scope-note { font-size: .8rem !important; color: var(--text-muted) !important; }
.evidence-panel { border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-secondary); padding: 2rem; }
.evidence-number { font-size: clamp(2.4rem, 4vw, 3.5rem); font-weight: 700; line-height: 1.2; letter-spacing: -.04em; margin-bottom: .5rem; }
.evidence-panel > p:not(.eyebrow):not(.evidence-number):not(.panel-caption) { font-size: .92rem; color: var(--text-secondary); }
.evidence-panel hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }
.evidence-panel h4 { font-size: 1rem; margin-bottom: .75rem; }
.plain-list { list-style: disc; padding-left: 1.1rem; color: var(--text-secondary); font-size: .87rem; }
.plain-list li { margin-bottom: .65rem; }
.methodology-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 5rem; align-items: center; }
.methodology-layout .section-title { margin-bottom: 1rem; }
.methodology-role { margin-top: 1rem; }
.phase-list { list-style: none; }
.phase-list li { padding: .85rem 0; border-bottom: 1px solid var(--border); font-size: .93rem; display: flex; gap: 1rem; align-items: center; }
.phase-list span { color: var(--accent); font-size: .75rem; font-weight: 700; }
.lab-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2rem; }
.lab-story { padding-top: 1.5rem; border-top: 2px solid var(--accent); display: flex; flex-direction: column; }
.lab-story h3 { font-size: 1.25rem; line-height: 1.3; letter-spacing: -.02em; margin-bottom: 1rem; }
.lab-story > p:not(.eyebrow) { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }
.finding { margin: 1.5rem 0 1rem; padding: 1rem 0; border-block: 1px solid var(--border); }
.finding strong { display: block; font-size: 1rem; margin-bottom: .3rem; }
.finding span { font-size: .83rem; color: var(--text-secondary); }
.lab-story .scope-note { margin-bottom: 1.5rem; }
.lab-story .text-link { margin-top: auto; }
.additional-list { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem 4rem; }
.additional-list h3 { font-size: 1.1rem; margin-bottom: .65rem; }
.additional-list p { color: var(--text-secondary); font-size: .9rem; margin-bottom: .85rem; }
.additional-list a { font-size: .85rem; font-weight: 600; }
.additional-list .story-links { margin-top: 0; }
.portfolio-reviewed { margin-top: 3rem; color: var(--text-muted); font-size: .75rem; }
.back-link { display: inline-block; margin-bottom: 2rem; font-size: .85rem; }
.case-intro h1 { max-width: 18ch; }
.case-meta { display: flex; flex-wrap: wrap; gap: .5rem 2rem; font-size: .75rem; color: var(--text-muted); margin-top: 2rem; }
.case-layout { display: grid; grid-template-columns: 1fr 2.4fr; gap: 5rem; }
.case-sidebar h2 { font-size: .85rem; margin-bottom: .7rem; }
.case-sidebar p { font-size: .87rem; color: var(--text-secondary); margin-bottom: 1.25rem; }
.case-narrative { max-width: 72ch; }
.case-narrative > section { margin-bottom: 3rem; }
.case-narrative h2 { font-size: 1.5rem; letter-spacing: -.03em; margin-bottom: 1rem; }
.case-narrative p { color: var(--text-secondary); line-height: 1.8; font-size: .95rem; margin-bottom: 1rem; }
.control-examples article { padding: 1.2rem 0; border-top: 1px solid var(--border); }
.control-examples h3 { font-size: 1.05rem; line-height: 1.5; margin-bottom: .5rem; }
.case-narrative .eyebrow { font-size: .7rem; line-height: 1.5; }
.release-result { background: var(--bg-secondary); padding: 1.75rem; border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 6px; margin: 1.5rem 0; }
.release-result dl { margin-bottom: 1rem; }
.release-result dl div { display: flex; justify-content: space-between; gap: 1rem; padding: .65rem 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.release-result dd { font-weight: 700; }
.release-result p:last-child { margin-bottom: 0; font-size: .85rem; }
@media (max-width: 1099px) {
  .project-preview-grid { gap: 1rem; }
  .preview-body { padding: 1.15rem; }
  .work-story { gap: 2rem; }
  .lab-grid { gap: 1.5rem; }
}
@media (max-width: 899px) {
  .project-preview-grid, .lab-grid { grid-template-columns: 1fr; }
  .project-preview { display: grid; grid-template-columns: 1fr 1.3fr; }
  .preview-media { aspect-ratio: auto; min-height: 220px; height: 100%; border-bottom: none; }
  .work-story, .methodology-layout, .evidence-intro { grid-template-columns: 1fr; gap: 2rem; }
  .project-figure, .evidence-panel { max-width: 640px; }
  .methodology-note { align-items: start; flex-direction: column; gap: 1rem; }
  .lab-story { padding-bottom: 1.5rem; }
  .case-layout { grid-template-columns: 1fr; gap: 2rem; }
  .case-sidebar { max-width: 65ch; padding-bottom: 1.5rem; border-bottom: 1px solid var(--border); }
}
@media (max-width: 599px) {
  .page-intro { padding-top: 7rem; }
  .section-heading-row { flex-direction: column; align-items: start; gap: 1rem; }
  .project-preview { display: flex; }
  .preview-media { height: auto; aspect-ratio: 1.5; min-height: 0; }
  .preview-body { padding: 1.5rem; }
  .additional-list { grid-template-columns: 1fr; gap: 2rem; }
  .work-story { padding-top: 1rem; }
  .evidence-panel { padding: 1.5rem; }
  .release-result { padding: 1.2rem; }
}