/* ============================================================
   SYNTHETICA SLATE — Design System
   The Precision Archive | Data Analyst Portfolio
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Manrope:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap');

/* ============================================================
   DESIGN TOKENS (CSS Custom Properties)
   ============================================================ */
:root {
  /* --- Color Palette --- */
  --background: #121416;
  --surface: #121416;
  --surface-dim: #121416;
  --surface-bright: #38393c;
  --surface-container-lowest: #0c0e10;
  --surface-container-low: #1a1c1e;
  --surface-container: #1e2022;
  --surface-container-high: #282a2c;
  --surface-container-highest: #333537;
  --surface-variant: #333537;
  --surface-tint: #b6c4ff;

  --primary: #b6c4ff;
  --primary-container: #003ebe;
  --on-primary: #002780;
  --on-primary-container: #a8b9ff;

  --secondary: #b4cad6;
  --secondary-container: #374c56;
  --on-secondary: #1e333c;
  --on-secondary-container: #a6bcc7;

  --tertiary: #44ddc1;
  --tertiary-container: #005649;
  --on-tertiary: #00382f;
  --on-tertiary-container: #34d2b7;

  --on-background: #e2e2e5;
  --on-surface: #e2e2e5;
  --on-surface-variant: #c3c6d4;

  --outline: #8d909d;
  --outline-variant: #434652;

  --error: #ffb4ab;
  --error-container: #93000a;

  --inverse-surface: #e2e2e5;
  --inverse-on-surface: #2f3133;
  --inverse-primary: #004ee8;

  /* --- Typography --- */
  --font-headline: 'Manrope', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-label: 'Space Grotesk', monospace;

  /* --- Type Scale --- */
  --display-lg: 3.5rem;
  --display-md: 2.8rem;
  --display-sm: 2.2rem;
  --headline-lg: 2rem;
  --headline-md: 1.75rem;
  --headline-sm: 1.5rem;
  --title-lg: 1.375rem;
  --title-md: 1.125rem;
  --body-lg: 1.125rem;
  --body-md: 1rem;
  --body-sm: 0.875rem;
  --label-lg: 0.875rem;
  --label-md: 0.75rem;
  --label-sm: 0.6875rem;

  /* --- Spacing --- */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1.4rem;
  --spacing-5: 1.75rem;
  --spacing-6: 2rem;
  --spacing-8: 2.5rem;
  --spacing-10: 3.5rem;
  --spacing-12: 4rem;
  --spacing-16: 5.5rem;
  --spacing-20: 7rem;
  --spacing-24: 8.5rem;

  /* --- Roundness --- */
  --round-sm: 0.25rem;
  --round-md: 0.5rem;
  --round-lg: 0.75rem;
  --round-xl: 1rem;
  --round-full: 9999px;

  /* --- Shadows --- */
  --shadow-ambient: 0px 24px 48px rgba(0, 0, 0, 0.15);
  --shadow-card: 0px 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0px 24px 48px rgba(0, 0, 0, 0.25);

  /* --- Transitions --- */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-normal: 0.35s;
  --duration-fast: 0.2s;
  --duration-slow: 0.5s;
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--background);
  color: var(--on-surface);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

::selection {
  background: var(--primary-container);
  color: var(--primary);
}

/* ============================================================
   NAVIGATION — Glassmorphism
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-4) var(--spacing-10);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(18, 20, 22, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: background var(--duration-normal) var(--ease-out),
              padding var(--duration-normal) var(--ease-out);
}

.nav.scrolled {
  padding: var(--spacing-3) var(--spacing-10);
  background: rgba(18, 20, 22, 0.92);
}

.nav__logo {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: var(--title-lg);
  color: var(--on-surface);
  letter-spacing: -0.02em;
}

.nav__logo span {
  color: var(--tertiary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
}

.nav__link {
  font-family: var(--font-label);
  font-size: var(--label-lg);
  font-weight: 500;
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  position: relative;
  padding-bottom: 4px;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--tertiary);
  transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover,
.nav__link.active {
  color: var(--on-surface);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Mobile hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--on-surface);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   LAYOUT
   ============================================================ */
.page-wrapper {
  padding-top: 80px; /* nav clearance */
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--spacing-20);
  padding-right: var(--spacing-10);
}

.container--centered {
  padding-left: var(--spacing-10);
  padding-right: var(--spacing-10);
}

.section {
  padding-top: var(--spacing-24);
  padding-bottom: var(--spacing-24);
}

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

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

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

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
.display-lg {
  font-family: var(--font-headline);
  font-size: var(--display-lg);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--on-surface);
}

.display-md {
  font-family: var(--font-headline);
  font-size: var(--display-md);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}

.display-sm {
  font-family: var(--font-headline);
  font-size: var(--display-sm);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--on-surface);
}

.headline-lg {
  font-family: var(--font-headline);
  font-size: var(--headline-lg);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.headline-md {
  font-family: var(--font-headline);
  font-size: var(--headline-md);
  font-weight: 600;
  line-height: 1.35;
}

.headline-sm {
  font-family: var(--font-headline);
  font-size: var(--headline-sm);
  font-weight: 600;
  line-height: 1.4;
}

.title-lg {
  font-family: var(--font-headline);
  font-size: var(--title-lg);
  font-weight: 600;
  line-height: 1.4;
}

.body-lg {
  font-family: var(--font-body);
  font-size: var(--body-lg);
  line-height: 1.8;
  color: var(--on-surface-variant);
}

.body-md {
  font-family: var(--font-body);
  font-size: var(--body-md);
  line-height: 1.7;
  color: var(--on-surface-variant);
}

.label-lg {
  font-family: var(--font-label);
  font-size: var(--label-lg);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.label-md {
  font-family: var(--font-label);
  font-size: var(--label-md);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.label-sm {
  font-family: var(--font-label);
  font-size: var(--label-sm);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.text-tertiary {
  color: var(--tertiary);
}

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

.text-muted {
  color: var(--outline);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: var(--spacing-24);
  padding-bottom: var(--spacing-16);
}

.hero__eyebrow {
  font-family: var(--font-label);
  font-size: var(--label-lg);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--tertiary);
  margin-bottom: var(--spacing-6);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.2s forwards;
}

.hero__title {
  max-width: 800px;
  margin-bottom: var(--spacing-6);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.4s forwards;
}

.hero__subtitle {
  max-width: 600px;
  font-size: var(--body-lg);
  color: var(--on-surface-variant);
  line-height: 1.8;
  margin-bottom: var(--spacing-10);
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.6s forwards;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  font-family: var(--font-label);
  font-size: var(--label-lg);
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.875rem 2rem;
  border-radius: var(--round-sm);
  border: none;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  text-decoration: none;
}

.btn--primary {
  background: linear-gradient(15deg, var(--primary-container), var(--primary));
  color: var(--on-primary);
}

.btn--primary:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.btn--secondary {
  background: transparent;
  color: var(--tertiary);
  padding: 0.875rem 0;
  font-weight: 700;
}

.btn--secondary:hover {
  color: var(--on-surface);
}

.btn--secondary svg,
.btn--secondary .icon {
  transition: transform var(--duration-fast) var(--ease-out);
}

.btn--secondary:hover svg,
.btn--secondary:hover .icon {
  transform: translateX(4px);
}

.btn--outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid rgba(182, 196, 255, 0.25);
}

.btn--outline:hover {
  border-color: var(--primary);
  background: rgba(182, 196, 255, 0.08);
}

.btn-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-6);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeInUp 0.8s var(--ease-out) 0.8s forwards;
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--surface-container-high);
  border-radius: var(--round-lg);
  padding: var(--spacing-6);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-ambient);
}

.card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--round-md);
  background: var(--surface-container-lowest);
  margin-bottom: var(--spacing-5);
  color: var(--tertiary);
}

.card__icon svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
}

.card__title {
  font-family: var(--font-headline);
  font-size: var(--title-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-3);
  color: var(--on-surface);
}

.card__text {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  line-height: 1.7;
}

/* Grid layouts */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

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

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

.grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  margin-bottom: var(--spacing-12);
}

.section-header__eyebrow {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--tertiary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-4);
}

.section-header__title {
  font-family: var(--font-headline);
  font-size: var(--headline-lg);
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: var(--spacing-4);
}

.section-header__subtitle {
  font-size: var(--body-md);
  color: var(--on-surface-variant);
  max-width: 600px;
  line-height: 1.7;
}

/* ============================================================
   CASE STUDY CARDS
   ============================================================ */
.case-study {
  background: var(--surface-container-low);
  border-radius: var(--round-lg);
  padding: var(--spacing-10);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.case-study::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--tertiary), transparent);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.case-study:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-ambient);
}

.case-study:hover::before {
  opacity: 1;
}

.case-study__label {
  font-family: var(--font-label);
  font-size: var(--label-sm);
  color: var(--tertiary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.case-study__title {
  font-family: var(--font-headline);
  font-size: var(--headline-md);
  font-weight: 700;
  color: var(--on-surface);
}

.case-study__text {
  font-size: var(--body-md);
  color: var(--on-surface-variant);
  line-height: 1.7;
}

/* ============================================================
   DATA CHIPS (Pill Tags)
   ============================================================ */
.chip {
  display: inline-block;
  padding: 0.375rem 1rem;
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  font-family: var(--font-label);
  font-size: var(--label-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--round-full);
  white-space: nowrap;
}

.chip--tertiary {
  background: var(--tertiary-container);
  color: var(--on-tertiary-container);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-2);
}

/* ============================================================
   STAT BLOCK
   ============================================================ */
.stat {
  text-align: left;
}

.stat__value {
  font-family: var(--font-headline);
  font-size: var(--display-sm);
  font-weight: 800;
  color: var(--tertiary);
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat__label {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--on-surface-variant);
  margin-top: var(--spacing-2);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.stats-row {
  display: flex;
  gap: var(--spacing-12);
  flex-wrap: wrap;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta {
  text-align: center;
  padding: var(--spacing-24) 0;
}

.cta .container {
  padding-left: var(--spacing-10);
  padding-right: var(--spacing-10);
}

.cta__title {
  font-family: var(--font-headline);
  font-size: var(--headline-lg);
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: var(--spacing-4);
}

.cta__text {
  font-size: var(--body-md);
  color: var(--on-surface-variant);
  margin-bottom: var(--spacing-8);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.cta .btn-group {
  justify-content: center;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--surface-container-lowest);
  padding: var(--spacing-10) 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-6);
}

.footer__socials {
  display: flex;
  gap: var(--spacing-6);
}

.footer__social-link {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--outline);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: color var(--duration-fast) var(--ease-out);
}

.footer__social-link:hover {
  color: var(--tertiary);
}

.footer__copy {
  font-family: var(--font-label);
  font-size: var(--label-sm);
  color: var(--outline);
  letter-spacing: 0.04em;
}

/* ============================================================
   PORTFOLIO — Project Gallery
   ============================================================ */
.project-card {
  background: var(--surface-container-high);
  border-radius: var(--round-lg);
  padding: var(--spacing-8);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  cursor: default;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-ambient);
}

.project-card__number {
  font-family: var(--font-label);
  font-size: var(--label-sm);
  color: var(--outline);
  letter-spacing: 0.1em;
}

.project-card__title {
  font-family: var(--font-headline);
  font-size: var(--title-lg);
  font-weight: 700;
  color: var(--on-surface);
}

.project-card__text {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  line-height: 1.7;
  flex: 1;
}

/* ============================================================
   CASE STUDY DEEP-DIVE (Portfolio page)
   ============================================================ */
.deep-dive {
  background: var(--surface-container-low);
  border-radius: var(--round-xl);
  overflow: hidden;
}

.deep-dive__header {
  padding: var(--spacing-16) var(--spacing-10);
  background: var(--surface-container);
}

.deep-dive__section {
  padding: var(--spacing-12) var(--spacing-10);
}

.deep-dive__section + .deep-dive__section {
  padding-top: 0;
}

.deep-dive__step {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--tertiary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-4);
}

.deep-dive__title {
  font-family: var(--font-headline);
  font-size: var(--headline-md);
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: var(--spacing-3);
}

.deep-dive__subtitle {
  font-family: var(--font-headline);
  font-size: var(--headline-sm);
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: var(--spacing-4);
}

.deep-dive__text {
  font-size: var(--body-md);
  color: var(--on-surface-variant);
  line-height: 1.8;
  max-width: 700px;
}

.deep-dive__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-6);
  margin-top: var(--spacing-8);
}

.deep-dive__item {
  background: var(--surface-container);
  border-radius: var(--round-md);
  padding: var(--spacing-6);
}

.deep-dive__item-title {
  font-family: var(--font-headline);
  font-size: var(--title-md);
  font-weight: 600;
  color: var(--on-surface);
  margin-bottom: var(--spacing-3);
}

.deep-dive__item-text {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  line-height: 1.7;
}

.deep-dive__sources {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
}

.deep-dive__source {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-family: var(--font-label);
  font-size: var(--label-lg);
  color: var(--on-surface-variant);
}

.deep-dive__source-icon {
  width: 20px;
  height: 20px;
  color: var(--tertiary);
}

/* Impact cards */
.impact-card {
  background: var(--surface-container);
  border-radius: var(--round-md);
  padding: var(--spacing-6);
}

.impact-card__label {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--spacing-3);
}

.impact-card__text {
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  line-height: 1.7;
}

/* Visualization placeholder */
.viz-placeholder {
  background: var(--surface-container-lowest);
  border-radius: var(--round-md);
  padding: var(--spacing-10);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  margin-top: var(--spacing-6);
  position: relative;
  overflow: hidden;
}

.viz-placeholder__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(67, 70, 82, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(67, 70, 82, 0.15) 1px, transparent 1px);
  background-size: 40px 40px;
}

.viz-placeholder__label {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--outline);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  z-index: 1;
}

/* ============================================================
   ABOUT PAGE — Timeline
   ============================================================ */
.timeline {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
}

.timeline__entry {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--spacing-6);
  align-items: start;
}

.timeline__period {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--outline);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-top: 4px;
}

.timeline__content {
  background: var(--surface-container-high);
  border-radius: var(--round-md);
  padding: var(--spacing-6);
}

.timeline__role {
  font-family: var(--font-headline);
  font-size: var(--title-lg);
  font-weight: 600;
  color: var(--on-surface);
}

.timeline__org {
  font-family: var(--font-body);
  font-size: var(--body-sm);
  color: var(--tertiary);
  margin-top: var(--spacing-1);
}

/* Education cards */
.edu-card {
  background: var(--surface-container-high);
  border-radius: var(--round-md);
  padding: var(--spacing-6);
}

.edu-card__label {
  font-family: var(--font-label);
  font-size: var(--label-sm);
  color: var(--outline);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-3);
}

.edu-card__degree {
  font-family: var(--font-headline);
  font-size: var(--title-lg);
  font-weight: 600;
  color: var(--on-surface);
}

.edu-card__school {
  font-family: var(--font-body);
  font-size: var(--body-sm);
  color: var(--on-surface-variant);
  margin-top: var(--spacing-1);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-10);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.contact-info__item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.contact-info__label {
  font-family: var(--font-label);
  font-size: var(--label-md);
  color: var(--outline);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.contact-info__value {
  font-family: var(--font-body);
  font-size: var(--body-lg);
  color: var(--tertiary);
}

.contact-info__value a {
  color: var(--tertiary);
}

.contact-info__value a:hover {
  color: var(--on-surface);
}

.contact-socials {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.contact-social-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  font-family: var(--font-label);
  font-size: var(--label-lg);
  color: var(--on-surface-variant);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color var(--duration-fast) var(--ease-out);
  padding: var(--spacing-3) 0;
}

.contact-social-link:hover {
  color: var(--tertiary);
}

.contact-social-link svg {
  width: 20px;
  height: 20px;
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .container {
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }

  .container--centered {
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }

  .display-lg {
    font-size: 2.5rem;
  }

  .display-md {
    font-size: 2rem;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .deep-dive__grid {
    grid-template-columns: 1fr;
  }

  .contact-block {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav {
    padding: var(--spacing-3) var(--spacing-5);
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(18, 20, 22, 0.96);
    backdrop-filter: blur(20px);
    padding: var(--spacing-6);
    gap: var(--spacing-5);
    text-align: center;
  }

  .nav__links.open {
    display: flex;
  }

  .nav__toggle {
    display: flex;
  }

  .display-lg {
    font-size: 2rem;
  }

  .display-md {
    font-size: 1.75rem;
  }

  .display-sm {
    font-size: 1.5rem;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .section {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
  }

  .hero {
    min-height: 80vh;
    padding-top: var(--spacing-12);
  }

  .case-study {
    padding: var(--spacing-6);
  }

  .stats-row {
    gap: var(--spacing-6);
  }

  .timeline__entry {
    grid-template-columns: 1fr;
    gap: var(--spacing-3);
  }

  .deep-dive__header,
  .deep-dive__section {
    padding: var(--spacing-8) var(--spacing-6);
  }

  .btn-group {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .footer__socials {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .display-lg {
    font-size: 1.75rem;
  }

  .headline-lg {
    font-size: 1.5rem;
  }

  .stat__value {
    font-size: 1.75rem;
  }
}

/* ============================================================
   CANVAS ANIMATION (Hero background)
   ============================================================ */
.hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.25;
  z-index: 0;
}

.hero {
  position: relative;
}

.hero > *:not(.hero-canvas) {
  position: relative;
  z-index: 1;
}

/* ============================================================
   TOOLKIT CHIPS (Portfolio)
   ============================================================ */
.toolkit-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-3);
  margin-top: var(--spacing-6);
}

.toolkit-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: 0.5rem 1.25rem;
  background: var(--surface-container-lowest);
  color: var(--on-surface-variant);
  font-family: var(--font-label);
  font-size: var(--label-lg);
  font-weight: 500;
  border-radius: var(--round-full);
  letter-spacing: 0.02em;
}

/* ============================================================
   ABOUT PAGE — Hero bio
   ============================================================ */
.bio-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

.bio-section__text {
  max-width: 700px;
}

.bio-section__focus {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: 0.5rem 1.25rem;
  background: var(--tertiary-container);
  color: var(--on-tertiary-container);
  font-family: var(--font-label);
  font-size: var(--label-md);
  font-weight: 500;
  border-radius: var(--round-full);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-6);
}