/* ═══════════════════════════════════════════════
   Frederick Potter — Portfolio
   Design tokens, components, layout, animation
   ═══════════════════════════════════════════════ */

/* ── Google Fonts ──────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400;12..96,500;12..96,600;12..96,700&family=Source+Serif+4:ital,opsz,wght@0,8..60,400;0,8..60,500;0,8..60,600;1,8..60,400&display=swap');

/* ── Design Tokens ─────────────────────────────── */
:root {
  /* Brand hue: 195 (deep petrol teal) — all neutrals tinted toward this */
  --hue-brand: 195;
  --hue-neutral: 230;

  /* Surfaces */
  --color-hero-bg: oklch(13% 0.02 230);
  --color-hero-text: oklch(93% 0.008 195);
  --color-hero-muted: oklch(68% 0.01 210);
  --color-surface: oklch(97.5% 0.004 195);
  --color-surface-alt: oklch(94.5% 0.006 195);
  --color-card: oklch(99% 0.002 195);
  --color-card-hover: oklch(99.5% 0.003 195);

  /* Text */
  --color-text: oklch(18% 0.012 230);
  --color-text-secondary: oklch(40% 0.01 230);
  --color-text-tertiary: oklch(55% 0.008 230);

  /* Accent — deep petrol teal */
  --color-accent: oklch(45% 0.1 195);
  --color-accent-hover: oklch(40% 0.11 195);
  --color-accent-light: oklch(93% 0.025 195);
  --color-accent-text: oklch(98% 0.005 195);

  /* Borders */
  --color-border: oklch(88% 0.008 195);
  --color-border-strong: oklch(78% 0.01 195);

  /* Semantic */
  --color-metric: oklch(38% 0.08 160);
  --color-quote: oklch(35% 0.015 230);

  /* Spacing — 4pt system */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-base: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  /* Typography */
  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;

  /* Type scale — fixed rem, 1.333 ratio (perfect fourth) */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.333rem;
  --text-2xl: 1.777rem;
  --text-3xl: clamp(2rem, 1.5rem + 1.5vw, 2.369rem);
  --text-4xl: clamp(2.4rem, 1.8rem + 2vw, 3.157rem);
  --text-5xl: clamp(3rem, 2rem + 3vw, 4.209rem);

  /* Line heights */
  --leading-tight: 1.15;
  --leading-snug: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Shadows — subtle, barely perceptible */
  --shadow-sm: 0 1px 2px oklch(18% 0.01 230 / 0.05);
  --shadow-md: 0 2px 8px oklch(18% 0.01 230 / 0.06), 0 1px 2px oklch(18% 0.01 230 / 0.04);
  --shadow-lg: 0 4px 16px oklch(18% 0.01 230 / 0.07), 0 2px 4px oklch(18% 0.01 230 / 0.04);

  /* Motion — expo ease-out for entrances */
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 860px;
}

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

html {
  font-kerning: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-surface);
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out-quart);
}

a:hover { color: var(--color-accent-hover); }

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

ul, ol { list-style: none; }

/* ── Utility ───────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.container--narrow {
  max-width: var(--max-width-narrow);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Navigation ────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-base) 0;
  transition: background var(--duration-normal) var(--ease-out-quart),
              box-shadow var(--duration-normal) var(--ease-out-quart);
}

.nav--scrolled {
  background: oklch(99% 0.002 195 / 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav--dark {
  color: var(--color-hero-text);
}

.nav--dark.nav--scrolled {
  color: var(--color-text);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-lg);
}

.nav__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: inherit;
  text-decoration: none;
}

.nav__links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
}

.nav__link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: inherit;
  text-decoration: none;
  opacity: 0.75;
  transition: opacity var(--duration-fast) var(--ease-out-quart);
}

.nav__link:hover,
.nav__link--active {
  opacity: 1;
}

.nav__hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav__hamburger-icon {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 20px;
}

.nav__hamburger-icon span {
  display: block;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out-quart),
              opacity var(--duration-fast);
}

.nav--open .nav__hamburger-icon span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav--open .nav__hamburger-icon span:nth-child(2) {
  opacity: 0;
}
.nav--open .nav__hamburger-icon span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile nav */
.nav__mobile-panel {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: oklch(99% 0.002 195 / 0.97);
  backdrop-filter: blur(20px);
  z-index: 99;
  padding: 80px var(--space-lg) var(--space-2xl);
  flex-direction: column;
  gap: var(--space-xl);
}

.nav--open .nav__mobile-panel {
  display: flex;
}

.nav__mobile-link {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
}

/* ── Hero Section (Landing) ────────────────────── */
.hero {
  background: var(--color-hero-bg);
  color: var(--color-hero-text);
  padding: var(--space-4xl) 0 var(--space-3xl);
  min-height: 70vh;
  display: flex;
  align-items: flex-end;
}

.hero__content {
  max-width: 720px;
}

.hero__label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-hero-muted);
  margin-bottom: var(--space-lg);
}

.hero__name {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
  margin-bottom: var(--space-lg);
}

.hero__summary {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-hero-muted);
  max-width: 60ch;
  margin-bottom: var(--space-2xl);
}

.hero__stats {
  display: flex;
  gap: var(--space-xl);
  flex-wrap: wrap;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-hero-muted);
}

.hero__stat-number {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-hero-text);
  font-variant-numeric: tabular-nums;
  display: block;
  line-height: var(--leading-tight);
}

.hero__stat-label {
  margin-top: var(--space-xs);
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
  padding: var(--space-md) var(--space-lg);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent-text);
  background: var(--color-accent);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-out-quart),
              transform var(--duration-fast) var(--ease-out-quart);
}

.hero__cta:hover {
  background: var(--color-accent-hover);
  color: var(--color-accent-text);
  transform: translateY(-1px);
}

.hero__cta-arrow {
  transition: transform var(--duration-fast) var(--ease-out-quart);
}

.hero__cta:hover .hero__cta-arrow {
  transform: translateX(3px);
}

.hero__cta:active {
  transform: translateY(0px) scale(0.98);
  transition-duration: 80ms;
}

/* ── Section Headers ───────────────────────────── */
.section {
  padding: var(--space-3xl) 0;
}

.section--alt {
  background: var(--color-surface-alt);
}

.section__header {
  margin-bottom: var(--space-2xl);
}

.section__label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-sm);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.section__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
  max-width: 55ch;
}

/* ── Sector Bar ────────────────────────────────── */
.sectors {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  padding: var(--space-2xl) 0;
}

.sector-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-base);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.sector-pill:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.sector-pill--active {
  color: var(--color-accent-text);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.sector-pill--active:hover {
  color: var(--color-accent-text);
  background: var(--color-accent-hover);
}

.sector-pill:active {
  transform: scale(0.96);
}

.sector-pill__count {
  font-variant-numeric: tabular-nums;
  opacity: 0.6;
}

/* ── Case Study Cards ──────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--duration-fast) var(--ease-out-quart),
              box-shadow var(--duration-fast) var(--ease-out-quart);
}

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

.card:active {
  transform: translateY(-1px);
  transition-duration: 80ms;
}

.card__header {
  padding: var(--space-lg);
  cursor: pointer;
}

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.card__sector-tag {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  padding: 3px var(--space-sm);
  border-radius: var(--radius-sm);
}

.card__number {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}

.card__client {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.card__project {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.card__about {
  margin-top: var(--space-md);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--color-text-secondary);
}

.card__result {
  margin-top: var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  line-height: var(--leading-normal);
  color: var(--color-metric);
}

.card__preview-skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.card__skill-more {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-tertiary);
  padding: 3px var(--space-sm);
}

.card__relationship {
  margin-top: var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-tertiary);
}

.card__toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-base);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  padding: var(--space-xs) 0;
  transition: gap var(--duration-fast) var(--ease-out-quart);
}

.card__toggle:hover {
  gap: var(--space-sm);
}

.card__toggle-icon {
  display: inline-flex;
  transition: transform var(--duration-fast) var(--ease-out-quart);
}

.card__toggle:hover .card__toggle-icon {
  transform: translateX(2px);
}

/* Card details — hidden, rendered inside detail panel instead */
.card__details {
  display: none;
}

/* ── Detail Panel (slide-in overlay) ──────────── */
.detail-panel-backdrop {
  position: fixed;
  inset: 0;
  background: oklch(13% 0.02 230 / 0);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-normal) var(--ease-out-quart),
              background var(--duration-slow) var(--ease-out-quart);
}

.detail-panel-backdrop--open {
  opacity: 1;
  pointer-events: auto;
  background: oklch(13% 0.02 230 / 0.45);
}

.detail-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(640px, 92vw);
  height: 100vh;
  height: 100dvh;
  background: var(--color-card);
  z-index: 201;
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out-expo);
  overflow-y: auto;
  overscroll-behavior: contain;
  box-shadow: -8px 0 32px oklch(0% 0 0 / 0.12);
}

.detail-panel--open {
  transform: translateX(0);
}

.detail-panel__header {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-base) var(--space-lg);
  background: oklch(99% 0.002 195 / 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.detail-panel__close {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast) var(--ease-out-quart),
              background var(--duration-fast) var(--ease-out-quart);
}

.detail-panel__close:hover {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.detail-panel__nav {
  display: flex;
  gap: var(--space-xs);
}

.detail-panel__nav-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  transition: color var(--duration-fast) var(--ease-out-quart),
              background var(--duration-fast) var(--ease-out-quart);
}

.detail-panel__nav-btn:hover:not(:disabled) {
  color: var(--color-text);
  background: var(--color-surface-alt);
}

.detail-panel__nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.detail-panel__body {
  padding: var(--space-xl) var(--space-lg) var(--space-3xl);
  transition: opacity 150ms var(--ease-out-quart);
}

.detail-panel__meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.detail-panel__client {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--leading-snug);
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.detail-panel__project {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.detail-panel__relationship {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-tertiary);
  margin-top: var(--space-md);
}

.detail-panel__section {
  margin-top: var(--space-xl);
}

.detail-panel__section-label {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-sm);
}

.detail-panel__section-text {
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  max-width: 70ch;
}

.detail-panel__section-text p {
  margin-bottom: var(--space-md);
}

.detail-panel__section-text p:last-child {
  margin-bottom: 0;
}

.detail-panel__result {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--color-metric);
}

.detail-panel__skills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.card__metric-highlight {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--color-metric);
}

.card__skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.card__skill-tag {
  font-family: var(--font-display);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-surface-alt);
  padding: 3px var(--space-sm);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.card__skill-tag:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

/* ── Skills Cloud ──────────────────────────────── */
.skills-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
  justify-content: flex-start;
  max-width: 900px;
}

.skills-cloud__item {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.skills-cloud__item:hover {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.skills-cloud__item--xl { font-size: var(--text-xl); font-weight: 600; color: var(--color-text); }
.skills-cloud__item--lg { font-size: var(--text-lg); font-weight: 600; color: var(--color-text); }
.skills-cloud__item--md { font-size: var(--text-base); }
.skills-cloud__item--sm { font-size: var(--text-sm); }
.skills-cloud__item--xs { font-size: var(--text-xs); }

/* ── Filter Bar (Case Studies Page) ────────────── */
.filter-bar {
  position: sticky;
  top: 53px;
  z-index: 50;
  background: oklch(97.5% 0.004 195 / 0.92);
  backdrop-filter: blur(12px);
  padding: var(--space-base) 0;
  border-bottom: 1px solid var(--color-border);
}

.filter-bar__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.filter-bar__row {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

.filter-bar__search {
  flex: 1;
  min-width: 200px;
  max-width: 380px;
  position: relative;
}

.filter-bar__search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.filter-bar__search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-base) var(--space-sm) 36px;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--duration-fast) var(--ease-out-quart);
}

.filter-bar__search-input::placeholder {
  color: var(--color-text-tertiary);
}

.filter-bar__search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px oklch(45% 0.1 195 / 0.1);
}

/* Unified filter dropdowns */
.filter-dropdown {
  position: relative;
}

.filter-dropdown__trigger {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm) var(--space-base);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  transition: all var(--duration-fast) var(--ease-out-quart);
  white-space: nowrap;
}

.filter-dropdown__trigger:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.filter-dropdown__trigger--active {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.filter-dropdown__trigger:active {
  transform: scale(0.96);
}

.filter-dropdown__panel {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  display: none;
  flex-direction: column;
  z-index: 200;
  padding: var(--space-sm);
}

.filter-dropdown--open > .filter-dropdown__panel {
  display: flex;
}

.filter-dropdown__panel--sectors {
  max-height: 400px;
  overflow-y: auto;
}

.filter-dropdown__panel--skills {
  width: 300px;
  max-height: 360px;
  padding: 0;
}

.filter-dropdown__panel--skills .filter-dropdown__list {
  overflow-y: auto;
  padding: var(--space-sm);
  flex: 1;
}

.filter-dropdown__search {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.filter-dropdown__search-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
}

.filter-dropdown__search-input:focus {
  border-color: var(--color-accent);
}

/* Dropdown items (used by engagement, type, and skills) */
.filter-dropdown__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out-quart);
}

.filter-dropdown__item:hover {
  background: var(--color-surface-alt);
}

.filter-dropdown__item--selected {
  color: var(--color-accent);
  font-weight: 500;
}

.filter-dropdown__checkbox {
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--duration-fast) var(--ease-out-quart);
}

.filter-dropdown__item--selected .filter-dropdown__checkbox {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.filter-dropdown__count {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}

/* Active filters chips */
.active-filters {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  align-items: center;
}

.active-filters:empty {
  display: none;
}

.active-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 3px var(--space-sm) 3px var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border-radius: 100px;
}

.active-filter-chip__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--color-accent);
  font-size: 14px;
  line-height: 1;
  transition: background var(--duration-fast);
}

.active-filter-chip__remove:hover {
  background: oklch(45% 0.1 195 / 0.15);
}

.filter-bar__result-count {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.filter-bar__clear {
  font-family: var(--font-display);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-tertiary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--duration-fast);
}

.filter-bar__clear:hover {
  color: var(--color-accent);
}

/* ── Footer ────────────────────────────────────── */
.footer {
  padding: var(--space-3xl) 0;
  background: var(--color-hero-bg);
  color: var(--color-hero-muted);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.footer__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-hero-text);
  margin-bottom: var(--space-sm);
}

.footer__text {
  font-size: var(--text-sm);
  max-width: 40ch;
}

.footer__links {
  display: flex;
  gap: var(--space-xl);
}

.footer__link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-hero-muted);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__link:hover {
  color: var(--color-hero-text);
}

/* ── Case Studies Page Hero ────────────────────── */
.page-hero {
  background: var(--color-hero-bg);
  color: var(--color-hero-text);
  padding: var(--space-4xl) 0 var(--space-2xl);
}

.page-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.02em;
}

.page-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-hero-muted);
  margin-top: var(--space-sm);
}

/* ── Scroll Animations ─────────────────────────── */
.animate-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.animate-in--visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-in--stagger {
  transition-delay: calc(var(--stagger, 0) * 50ms);
}

/* Hero entrance */
.hero-animate {
  opacity: 0;
  transform: translateY(20px);
}

.hero-animate--visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 600ms var(--ease-out-expo),
              transform 600ms var(--ease-out-expo);
}

.hero-animate--delay-1 { transition-delay: 100ms; }
.hero-animate--delay-2 { transition-delay: 200ms; }
.hero-animate--delay-3 { transition-delay: 300ms; }
.hero-animate--delay-4 { transition-delay: 400ms; }

/* Card filter transition */
.card--hidden {
  display: none;
}

.card--fading {
  opacity: 0;
  transform: scale(0.97);
  transition: opacity 200ms var(--ease-out-quart),
              transform 200ms var(--ease-out-quart);
}

/* ── Empty state ───────────────────────────────── */
.empty-state {
  text-align: left;
  padding: var(--space-3xl) 0;
  max-width: 400px;
}

.empty-state__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.empty-state__text {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-base);
}

.empty-state__action {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

/* ── Reduced Motion ────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html { scroll-behavior: auto; }

  .animate-in,
  .hero-animate {
    opacity: 1;
    transform: none;
  }
}

/* ── Responsive ────────────────────────────────── */
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__hamburger { display: flex; }

  .hero {
    padding: var(--space-3xl) 0 var(--space-2xl);
    min-height: auto;
  }

  .hero__name { font-size: clamp(2rem, 6vw, 3rem); }
  .hero__stats { gap: var(--space-base); }

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

  .filter-bar {
    top: 53px;
  }

  .filter-bar__search {
    max-width: 100%;
    min-width: 100%;
  }

  .filter-dropdown__panel {
    position: fixed;
    left: var(--space-base);
    right: var(--space-base);
    top: auto;
    width: auto;
    max-height: 50vh;
  }

  .filter-dropdown__panel--skills {
    width: auto;
  }

  .section { padding: var(--space-2xl) 0; }
  .section__title { font-size: var(--text-2xl); }

  .detail-panel {
    width: 100vw;
  }

  .detail-panel__client {
    font-size: var(--text-xl);
  }

  .footer__inner {
    flex-direction: column;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Print ─────────────────────────────────────── */
@media print {
  .nav, .filter-bar, .hero__cta, .card__toggle,
  .skills-cloud, .sectors, .footer, .detail-panel-backdrop, .detail-panel { display: none; }

  .card__details { display: block; }
  .card { break-inside: avoid; page-break-inside: avoid; }
  .hero { background: none; color: var(--color-text); min-height: auto; padding: 2rem 0; }
}