/* ==========================================================================
   brianjpollard.com — Design System
   Stack: Inter (all weights), dark-first, electric blue accent
   Distinct from NPG: no Playfair, charcoal palette, blue/amber vs navy/gold
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ==========================================================================
   RESET
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; }

/* ==========================================================================
   DESIGN TOKENS
   ========================================================================== */
:root {
  /* Dark palette */
  --color-dark:           #0f172a;
  --color-dark-surface:   #1e293b;
  --color-dark-surface2:  #263347;
  --color-dark-border:    #334155;

  /* Accent blue */
  --color-blue:           #3b82f6;
  --color-blue-hover:     #2563eb;
  --color-blue-light:     #60a5fa;
  --color-blue-glow:      rgba(59, 130, 246, 0.10);
  --color-blue-glow-md:   rgba(59, 130, 246, 0.18);

  /* Warm accent (for highlights, badges — distinct from NPG gold) */
  --color-amber:          #f59e0b;
  --color-amber-light:    #fbbf24;

  /* Base backgrounds — true dark-first */
  --color-bg:             #0a0f1e;
  --color-bg-alt:         #111827;

  /* Text */
  --color-text:           #f1f5f9;
  --color-text-muted:     #94a3b8;
  --color-text-light:     #64748b;

  /* Borders */
  --color-border:         #1e293b;

  /* Success / metrics */
  --color-success:        #10b981;

  /* Typography */
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;

  /* Layout */
  --nav-height:  72px;
  --max-width:   1160px;

  /* Spacing shorthand */
  --section-padding: 5rem 0;

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-full: 100px;

  /* Shadows */
  --shadow-sm:   0 1px 4px rgba(0, 0, 0, 0.06);
  --shadow-md:   0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg:   0 12px 48px rgba(0, 0, 0, 0.12);
  --shadow-blue: 0 4px 24px rgba(59, 130, 246, 0.20);

  /* Motion */
  --transition: 0.2s ease;
}

/* ==========================================================================
   LAYOUT
   ========================================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: var(--section-padding);
  background: var(--color-bg);
}
.section--alt  { background: var(--color-bg-alt); }
.section--dark { background: var(--color-dark); }

/* Section header */
.section__header { margin-bottom: 3rem; }
.section__header--center { text-align: center; }
.section__header--center .section__subtitle {
  margin-left: auto;
  margin-right: auto;
  max-width: 600px;
}

.section__label {
  display: inline-block;
  font-size: 0.725rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 0.75rem;
}
.section--dark .section__label { color: var(--color-blue-light); }

.section__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section--dark .section__title { color: #ffffff; }

.section__subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 640px;
}
.section--dark .section__subtitle { color: rgba(255, 255, 255, 0.6); }

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: rgba(15, 23, 42, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: 0 4px 28px rgba(0, 0, 0, 0.35); }

.nav__inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: var(--nav-height);
}

/* Brand */
.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
  text-decoration: none;
}
.nav__logo { width: 32px; height: 32px; flex-shrink: 0; }
.nav__brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.nav__brand-name {
  font-size: 0.875rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}
.nav__brand-tagline {
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--color-blue-light);
}

/* Desktop links */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  margin-left: auto;
}
.nav__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover { color: #ffffff; background: rgba(255, 255, 255, 0.06); }
.nav__link.active { color: var(--color-blue-light); background: rgba(59, 130, 246, 0.08); }

.nav__cta { margin-left: 0.75rem; flex-shrink: 0; }

/* Hamburger */
.nav__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.8);
  padding: 0;
  margin-left: auto;
}

/* Mobile nav panel */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--color-dark);
  border-bottom: 1px solid var(--color-dark-border);
  padding: 1rem 1.5rem 1.5rem;
  flex-direction: column;
  gap: 0.25rem;
  z-index: 99;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}
.nav__mobile.open { display: flex; }
.nav__mobile .nav__link {
  padding: 0.75rem 1rem;
  font-size: 1rem;
  border-radius: var(--radius-sm);
}
.nav__mobile .btn { margin-top: 0.75rem; text-align: center; justify-content: center; }

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.925rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

/* Variants */
.btn--primary {
  background: var(--color-blue);
  border-color: var(--color-blue);
  color: #ffffff;
}
.btn--primary:hover {
  background: var(--color-blue-hover);
  border-color: var(--color-blue-hover);
  box-shadow: var(--shadow-blue);
}

.btn--outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.85);
}
.btn--outline:hover { border-color: var(--color-blue); color: var(--color-blue); }

.btn--outline-white {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.28);
  color: #ffffff;
}
.btn--outline-white:hover {
  border-color: rgba(255, 255, 255, 0.65);
  background: rgba(255, 255, 255, 0.06);
}

.btn--dark {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: #ffffff;
}
.btn--dark:hover { background: var(--color-dark-surface); }

/* Sizes */
.btn--lg { padding: 0.9rem 2.25rem; font-size: 1rem; }
.btn--sm { padding: 0.5rem 1.125rem; font-size: 0.825rem; }

/* ==========================================================================
   TAGS / BADGES
   ========================================================================== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.65rem;
  background: var(--color-blue-glow);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-blue);
}
.tag--dark {
  background: var(--color-dark-surface);
  border-color: var(--color-dark-border);
  color: rgba(255, 255, 255, 0.65);
}
.tag--amber {
  background: rgba(245, 158, 11, 0.10);
  border-color: rgba(245, 158, 11, 0.25);
  color: var(--color-amber);
}
.tag--success {
  background: rgba(16, 185, 129, 0.10);
  border-color: rgba(16, 185, 129, 0.25);
  color: var(--color-success);
}

/* Proof type labels (portfolio cards) */
.proof-label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}
.proof-label--career {
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--color-blue-light);
}
.proof-label--ai {
  background: rgba(245, 158, 11, 0.10);
  border: 1px solid rgba(245, 158, 11, 0.28);
  color: var(--color-amber);
}
.proof-label--demo {
  background: rgba(16, 185, 129, 0.10);
  border: 1px solid rgba(16, 185, 129, 0.28);
  color: var(--color-success);
}

/* ==========================================================================
   HOME HERO
   ========================================================================== */
.hero {
  background: var(--color-dark);
  padding: calc(var(--nav-height) + 5rem) 0 5rem;
  position: relative;
  overflow: hidden;
}
/* Dot grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}
/* Ambient blue glow */
.hero::after {
  content: '';
  position: absolute;
  top: -160px;
  right: -80px;
  width: 640px; height: 640px;
  background: radial-gradient(ellipse, rgba(59, 130, 246, 0.10) 0%, transparent 68%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 360px;
  align-items: center;
  gap: 4rem;
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.hero__name {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 5.5vw, 4.5rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.hero__role {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-blue-light);
  margin-bottom: 1.5rem;
  letter-spacing: 0.005em;
}

.hero__tagline {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.75;
  max-width: 500px;
  margin-bottom: 2.25rem;
}

.hero__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero__stats {
  display: flex;
  gap: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.hero__stat-number {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -0.03em;
}

.hero__stat-label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 0.3rem;
  font-weight: 500;
}

/* Hero photo */
.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero__avatar {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid rgba(59, 130, 246, 0.35);
  box-shadow:
    0 0 0 8px rgba(59, 130, 246, 0.06),
    0 0 80px rgba(59, 130, 246, 0.14),
    var(--shadow-lg);
  position: relative;
  z-index: 1;
}

.hero__avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* Decorative ring behind avatar */
.hero__avatar-ring {
  position: absolute;
  width: 340px; height: 340px;
  border-radius: 50%;
  border: 1px solid rgba(59, 130, 246, 0.15);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

/* ==========================================================================
   PAGE HERO (interior pages — career, portfolio, speaking)
   ========================================================================== */
.page-hero {
  background: var(--color-dark);
  padding: calc(var(--nav-height) + 4rem) 0 4rem;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.048) 1px, transparent 1px);
  background-size: 28px 28px;
}
.page-hero__inner { position: relative; z-index: 1; }
.page-hero__label {
  display: block;
  font-size: 0.725rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-blue-light);
  margin-bottom: 1rem;
}
.page-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.page-hero__subtitle {
  font-size: 1.05rem;
  color: rgba(255, 255, 255, 0.58);
  max-width: 560px;
  line-height: 1.7;
}

/* Back link (project case study pages) */
.project-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 1.5rem;
  transition: color var(--transition);
}
.project-back:hover { color: var(--color-blue-light); }

/* ==========================================================================
   WORK / PROJECT CARDS
   ========================================================================== */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.work-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.work-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-blue);
}

.work-card__image {
  aspect-ratio: 16 / 9;
  background: var(--color-dark-surface);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.work-card__image-overlay {
  position: absolute;
  top: 0.75rem; left: 0.75rem;
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.work-card__body { padding: 1.25rem 1.5rem 1.5rem; }
.work-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}
.work-card__company {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}
.work-card__date {
  font-size: 0.7rem;
  color: var(--color-text-light);
  margin-left: auto;
}
.work-card__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
  line-height: 1.35;
}
.work-card__desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: 1rem;
}
.work-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.875rem;
  border-top: 1px solid var(--color-dark-border);
}
.work-card__impact {
  font-size: 0.775rem;
  color: var(--color-text-muted);
}
.work-card__impact strong { color: var(--color-success); }
.work-card__link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-blue);
  transition: color var(--transition);
}
.work-card__link:hover { color: var(--color-blue-hover); }

/* Featured card (full-width row) */
.work-card--featured { grid-column: 1 / -1; }
.work-card--featured .work-card__image { aspect-ratio: 21 / 9; }

/* ==========================================================================
   CAREER TIMELINE
   ========================================================================== */
.timeline {
  position: relative;
  padding-left: 2.5rem;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6rem; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--color-blue) 0%, var(--color-dark-border) 30%);
}

.timeline__item {
  position: relative;
  padding-bottom: 3rem;
}
.timeline__item:last-child { padding-bottom: 0; }

.timeline__dot {
  position: absolute;
  left: -2.5rem;
  top: 0.5rem;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--color-blue);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-blue);
  transform: translateX(calc(-50% + 0.5px));
}

.timeline__header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.75rem;
}
.timeline__logo {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  border: 1px solid var(--color-dark-border);
  background: var(--color-dark-surface);
  display: flex;
  align-items: center;
  justify-content: center;
}
.timeline__logo img {
  width: 100%; height: 100%;
  object-fit: contain;
  padding: 4px;
}
.timeline__role {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.2rem;
  line-height: 1.3;
}
.timeline__company {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-blue);
  margin-bottom: 0.2rem;
}
.timeline__dates {
  font-size: 0.75rem;
  color: var(--color-text-light);
}
.timeline__desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 0.875rem;
}
.timeline__highlights {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.timeline__highlights li {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  padding-left: 1rem;
  position: relative;
  line-height: 1.55;
}
.timeline__highlights li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--color-blue);
}

/* ==========================================================================
   SKILLS SECTION
   ========================================================================== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.skill-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.skill-card:hover {
  border-color: var(--color-blue);
  box-shadow: var(--shadow-blue);
}
.skill-card__label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 0.875rem;
}
.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
.skill-tag {
  padding: 0.25rem 0.6rem;
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-sm);
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.skill-tag:hover {
  background: var(--color-blue-glow);
  border-color: rgba(59, 130, 246, 0.22);
  color: var(--color-blue);
}

/* ==========================================================================
   EDUCATION GRID
   ========================================================================== */
.edu-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.edu-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.edu-card:hover {
  border-color: var(--color-blue);
  box-shadow: var(--shadow-blue);
}
.edu-card__icon {
  font-size: 1.75rem;
  flex-shrink: 0;
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.edu-card__degree {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}
.edu-card__school {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--color-blue);
  margin-bottom: 0.2rem;
}
.edu-card__meta {
  font-size: 0.775rem;
  color: var(--color-text-light);
}
.edu-card__note {
  margin-top: 0.4rem;
  font-size: 0.775rem;
  color: var(--color-text-muted);
}

/* ==========================================================================
   STATS ROW
   ========================================================================== */
.stats-row {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
}
.stat-item { display: flex; flex-direction: column; }
.stat-item__number {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 900;
  color: #ffffff;
  line-height: 1;
  letter-spacing: -0.035em;
}
.stat-item__label {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.45);
  margin-top: 0.3rem;
  font-weight: 500;
}

/* ==========================================================================
   TRUST BAR (company logos)
   ========================================================================== */
.trust-bar {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  flex-wrap: wrap;
}
.trust-bar__label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.28);
  flex-shrink: 0;
  white-space: nowrap;
}
.trust-bar__logos {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.trust-bar__name {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.38);
  white-space: nowrap;
  transition: color var(--transition);
}
.trust-bar__name:hover { color: rgba(255, 255, 255, 0.65); }
.trust-bar__sep {
  color: rgba(255, 255, 255, 0.15);
  font-size: 0.75rem;
}

/* ==========================================================================
   FILTER BAR (portfolio page)
   ========================================================================== */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.filter-btn {
  padding: 0.45rem 1.1rem;
  background: transparent;
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
}
.filter-btn:hover { border-color: var(--color-blue); color: var(--color-blue); }
.filter-btn.active {
  background: var(--color-blue);
  border-color: var(--color-blue);
  color: #ffffff;
}

/* ==========================================================================
   FEATURE / HIGHLIGHT BLOCK (home page about snapshot, etc.)
   ========================================================================== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.feature-block--reverse .feature-block__visual { order: -1; }

.feature-block__visual {
  position: relative;
  display: flex;
  justify-content: center;
}
.feature-block__content { }
.feature-block__title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.feature-block__body {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1.5rem;
}
.feature-block__list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.feature-block__list li {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  padding-left: 1.25rem;
  position: relative;
  line-height: 1.55;
}
.feature-block__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-blue);
}

/* ==========================================================================
   CTA SECTION
   ========================================================================== */
.cta-section {
  background: var(--color-dark);
  padding: 5.5rem 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
}
/* Blue glow in CTA */
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -100px; left: 50%;
  transform: translateX(-50%);
  width: 800px; height: 400px;
  background: radial-gradient(ellipse, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.cta-section__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
}
.cta-section__label {
  display: block;
  font-size: 0.725rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-blue-light);
  margin-bottom: 1rem;
}
.cta-section__title {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: #ffffff;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.cta-section__subtitle {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.58);
  line-height: 1.75;
  margin-bottom: 2.25rem;
}
.cta-section__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: #080e1c;
  padding: 3rem 0 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.footer__brand-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.5rem;
}
.footer__brand-desc {
  font-size: 0.825rem;
  color: rgba(255, 255, 255, 0.38);
  line-height: 1.65;
  max-width: 260px;
}
.footer__col-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.28);
  margin-bottom: 1rem;
}
.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer__link {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.48);
  transition: color var(--transition);
}
.footer__link:hover { color: rgba(255, 255, 255, 0.88); }
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.footer__copyright {
  font-size: 0.775rem;
  color: rgba(255, 255, 255, 0.28);
}
.footer__social {
  display: flex;
  gap: 1.25rem;
}

/* ==========================================================================
   PROJECT DETAIL (case study layout)
   ========================================================================== */
.project-detail__body {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: start;
}
.project-detail__main { }
.project-detail__sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 1.5rem);
}
.sidebar-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.sidebar-card__title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}
.sidebar-card__item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-dark-border);
  font-size: 0.85rem;
}
.sidebar-card__item:last-child { border-bottom: none; }
.sidebar-card__key { color: var(--color-text-muted); }
.sidebar-card__val { font-weight: 600; color: var(--color-text); }

/* Metrics grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
}
.metric-card {
  background: var(--color-dark-surface);
  border: 1px solid var(--color-dark-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}
.metric-card__number {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-blue);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 0.35rem;
}
.metric-card__label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Prose content */
.prose h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.015em;
}
.prose h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 1.5rem 0 0.5rem;
}
.prose p {
  font-size: 0.975rem;
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: 1rem;
}
.prose ul {
  list-style: none;
  margin-bottom: 1rem;
}
.prose ul li {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  padding-left: 1.25rem;
  position: relative;
  margin-bottom: 0.4rem;
}
.prose ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--color-blue);
}

/* ==========================================================================
   SCROLL ANIMATIONS
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-fade-up {
  opacity: 0;
  transform: translateY(22px);
  animation: fadeUp 0.6s ease forwards;
}
.animate-fade-up--delay-1 { animation-delay: 0.08s; }
.animate-fade-up--delay-2 { animation-delay: 0.16s; }
.animate-fade-up--delay-3 { animation-delay: 0.24s; }
.animate-fade-up--delay-4 { animation-delay: 0.32s; }

@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

/* Tablet — ≤ 1024px */
@media (max-width: 1024px) {
  .hero__inner { grid-template-columns: 1fr; text-align: center; }
  .hero__eyebrow,
  .hero__actions,
  .hero__stats { justify-content: center; }
  .hero__tagline { margin-left: auto; margin-right: auto; }
  .hero__visual { display: none; }

  .work-grid { grid-template-columns: repeat(2, 1fr); }
  .work-card--featured { grid-column: span 2; }

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

  .feature-block { grid-template-columns: 1fr; gap: 3rem; }
  .feature-block--reverse .feature-block__visual { order: 0; }

  .footer__inner { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }

  .project-detail__body { grid-template-columns: 1fr; }
  .project-detail__sidebar { position: static; }
}

/* Mobile — ≤ 768px */
@media (max-width: 768px) {
  :root { --section-padding: 3.5rem 0; }
  .container { padding: 0 1.25rem; }

  .nav__links,
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }

  .hero { padding: calc(var(--nav-height) + 3.5rem) 0 3.5rem; }
  .hero__stats { gap: 1.5rem; }

  .work-grid { grid-template-columns: 1fr; }
  .work-card--featured { grid-column: span 1; }
  .work-card--featured .work-card__image { aspect-ratio: 16 / 9; }

  .skills-grid { grid-template-columns: 1fr; }
  .edu-grid { grid-template-columns: 1fr; }

  .stats-row { gap: 1.5rem; }

  .trust-bar { flex-direction: column; align-items: flex-start; gap: 1rem; }

  .timeline { padding-left: 1.75rem; }
  .timeline__dot { left: -1.75rem; }

  .cta-section__actions { flex-direction: column; align-items: stretch; }
  .cta-section__actions .btn { text-align: center; }

  .footer__inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer__bottom { flex-direction: column; gap: 0.75rem; text-align: center; }

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

/* Small mobile — ≤ 480px */
@media (max-width: 480px) {
  .hero__stats { flex-wrap: wrap; }
  .filter-bar { gap: 0.4rem; }
  .filter-btn { font-size: 0.775rem; padding: 0.4rem 0.875rem; }
}