/* ============================================
   SECTIONS — Page-specific styles
   ============================================ */

/* ─────────────────────────────────────────────
   NAVIGATION
   ───────────────────────────────────────────── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: var(--z-nav);
  background: rgba(245, 243, 239, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: background var(--t-base), border-color var(--t-theme);
}

[data-theme="dark"] .nav {
  background: rgba(26, 26, 30, 0.92);
}

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

.nav__logo {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.nav__menu {
  display: flex;
  gap: var(--s-32);
}

.nav__link {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-secondary);
  transition: color var(--t-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-accent);
  transition: width var(--t-base);
}

.nav__link:hover,
.nav__link.active {
  color: var(--c-text);
}

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

.nav__right {
  display: flex;
  align-items: center;
  gap: var(--s-24);
}

.nav__lang {
  display: flex;
  align-items: center;
  gap: var(--s-4);
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav__lang-sep {
  color: var(--c-text-tertiary);
  pointer-events: none;
}

.nav__lang-btn {
  padding: var(--s-4) var(--s-4);
  color: var(--c-text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  transition: color var(--t-fast);
}

.nav__lang-btn:hover {
  color: var(--c-text);
}

.nav__lang-btn.active {
  color: var(--c-text);
  font-weight: var(--fw-medium);
}

.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 28px;
  height: 28px;
  cursor: pointer;
}

.nav__burger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--c-text);
  transition:
    transform var(--t-base),
    opacity var(--t-fast);
}

.nav__burger.active span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.nav__burger.active span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* ── Mobile Menu Overlay ── */

.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-nav) - 1);
  background: rgba(245, 243, 239, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--t-medium),
    visibility var(--t-medium);
}

[data-theme="dark"] .nav-overlay {
  background: rgba(26, 26, 30, 0.98);
}

.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.nav-overlay__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s-32);
}

.nav-overlay__link {
  font-family: var(--f-sans);
  font-size: var(--ts-3xl);
  font-weight: var(--fw-medium);
  color: var(--c-text);
  transition: color var(--t-fast);
}

.nav-overlay__link:hover {
  color: var(--c-accent);
}


/* ─────────────────────────────────────────────
   HERO
   ───────────────────────────────────────────── */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--nav-h) + var(--s-64));
  padding-bottom: var(--s-64);
  border-top: none;
  position: relative;
}

.hero__label {
  display: flex;
  align-items: center;
  gap: var(--s-16);
  margin-bottom: var(--s-40);
}

.hero__number {
  font-family: var(--f-mono);
  font-size: var(--ts-sm);
  color: var(--c-text-tertiary);
  letter-spacing: 0.05em;
}

.hero__role {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-text-tertiary);
}

.hero__heading {
  font-size: clamp(var(--ts-3xl), 5.5vw, var(--ts-6xl));
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  max-width: 14ch;
  margin-bottom: var(--s-32);
}

.hero__subheading {
  font-size: clamp(var(--ts-base), 1.6vw, var(--ts-lg));
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
  max-width: 48ch;
  margin-bottom: var(--s-16);
}

.hero__note {
  font-size: var(--ts-sm);
  line-height: var(--lh-relaxed);
  color: var(--c-text-tertiary);
  max-width: 52ch;
  margin-bottom: var(--s-40);
}

.hero__cta {
  display: flex;
  gap: var(--s-16);
  margin-bottom: var(--s-64);
}

/* ── System Diagram ── */

.hero__diagram {
  padding-top: var(--s-32);
  border-top: 1px solid var(--c-border);
}

.diagram {
  display: flex;
  align-items: center;
}

.diagram__node {
  border: 1px solid var(--c-border);
  padding: var(--s-16) var(--s-20);
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto;
  align-items: center;
  gap: var(--s-4) var(--s-12);
  background: var(--c-bg);
  min-width: 120px;
  transition: border-color var(--t-base);
}

.diagram__num {
  grid-row: 1;
  grid-column: 1;
  justify-self: start;
}

.diagram__text {
  grid-row: 1;
  grid-column: 2;
  text-align: center;
}

.diagram__node:first-child {
  border-color: var(--c-text-secondary);
}

.diagram__node:hover {
  border-color: var(--c-text-tertiary);
}

.diagram__node--result {
  border-color: var(--c-accent);
}

.diagram__node--result:hover {
  border-color: var(--c-accent-hover);
}

.diagram__num {
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  color: var(--c-text-tertiary);
  letter-spacing: 0.05em;
  align-self: flex-start;
}

.diagram__node--result .diagram__num {
  color: var(--c-accent);
}

.diagram__text {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: var(--lh-snug);
  color: var(--c-text);
}

.diagram__connector {
  flex-grow: 1;
  display: flex;
  align-items: center;
  min-width: 24px;
  max-width: 56px;
}

.diagram__connector::before {
  content: '';
  flex: 1;
  border-top: 1px dashed var(--c-text-tertiary);
}

.diagram__connector::after {
  content: '';
  width: 0;
  height: 0;
  border-top: 3.5px solid transparent;
  border-bottom: 3.5px solid transparent;
  border-left: 6px solid var(--c-text-tertiary);
  flex-shrink: 0;
}

/* ── Blueprint reference marks ── */

.hero::before {
  content: '+';
  position: absolute;
  top: calc(var(--nav-h) + var(--s-32));
  right: var(--container-px);
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  color: var(--c-border);
  pointer-events: none;
}


/* ─────────────────────────────────────────────
   SELECTED WORK
   ───────────────────────────────────────────── */

.work__grid {
  display: grid;
  gap: var(--s-32);
}

.work__row {
  display: grid;
  gap: var(--s-32);
}

.work__row--2-1 {
  grid-template-columns: 1.4fr 1fr;
}

.work__row--1-2 {
  grid-template-columns: 1fr 1.4fr;
}

.work__row--full {
  grid-template-columns: 1fr;
}

.work__row--full .project-card {
  max-width: 100%;
}

.work__row--full .project-card__body {
  flex-direction: row;
  gap: var(--s-32);
}

.work__row--full .project-card__info {
  flex: 1;
}

.work__row--full .project-card__meta {
  flex: 0 0 280px;
  margin-top: 0;
  border-top: none;
  border-left: 1px solid var(--c-border-light);
  padding-top: 0;
  padding-left: var(--s-32);
}


/* ─────────────────────────────────────────────
   ABOUT
   ───────────────────────────────────────────── */

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--s-80);
  align-items: start;
}

.about__heading {
  font-size: clamp(var(--ts-2xl), 3vw, var(--ts-4xl));
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
}

.about__text {
  display: flex;
  flex-direction: column;
  gap: var(--s-24);
}

.about__text p {
  font-size: var(--ts-md);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
}

.about__disciplines {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-8);
  margin-top: var(--s-16);
}


/* ─────────────────────────────────────────────
   WHAT I BUILD (Services)
   ───────────────────────────────────────────── */

.services__list {
  display: flex;
  flex-direction: column;
}

.services__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-24);
  padding-block: var(--s-32);
  border-bottom: 1px solid var(--c-border-light);
}

.services__item:first-child {
  border-top: 1px solid var(--c-border-light);
}

.services__item-number {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  color: var(--c-text-tertiary);
  padding-top: 2px;
  min-width: 32px;
}

.services__item-content {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--s-32);
  align-items: baseline;
}

.services__item-title {
  font-size: var(--ts-lg);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
}

.services__item-desc {
  font-size: var(--ts-sm);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
  max-width: 50ch;
}


/* ─────────────────────────────────────────────
   PROCESS
   ───────────────────────────────────────────── */

.process__intro {
  max-width: 42ch;
  margin-bottom: var(--s-64);
}

.process__intro-heading {
  font-size: clamp(var(--ts-2xl), 3vw, var(--ts-4xl));
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
}

.process__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-24);
  position: relative;
}

.process__step {
  padding: var(--s-24);
  border: 1px solid var(--c-border);
  position: relative;
  background: var(--c-bg);
}

.process__step-number {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  color: var(--c-accent);
  letter-spacing: 0.05em;
  margin-bottom: var(--s-16);
}

.process__step-title {
  font-size: var(--ts-md);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--s-12);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.process__step-desc {
  font-size: var(--ts-sm);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
}

/* Connecting lines between steps */
.process__connector {
  position: absolute;
  top: 50%;
  right: -13px;
  width: 26px;
  height: 1px;
  z-index: 1;
}

.process__connector::before {
  content: '';
  display: block;
  width: 100%;
  height: 100%;
  border-top: 1px dashed var(--c-border);
}

.process__step:last-child .process__connector {
  display: none;
}


/* ─────────────────────────────────────────────
   WHY THIS APPROACH
   ───────────────────────────────────────────── */

.approach__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--s-80);
  align-items: start;
}

.approach__heading {
  font-size: clamp(var(--ts-2xl), 3vw, var(--ts-4xl));
  font-weight: var(--fw-bold);
  line-height: var(--lh-snug);
  letter-spacing: -0.01em;
}

.approach__content {
  display: flex;
  flex-direction: column;
  gap: var(--s-32);
}

.approach__text {
  font-size: var(--ts-md);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
  max-width: 52ch;
}

.approach__list {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
}

.approach__statement {
  font-size: var(--ts-md);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
  font-style: italic;
  padding-left: var(--s-24);
  border-left: 2px solid var(--c-accent);
}


/* ─────────────────────────────────────────────
   TOOLKIT
   ───────────────────────────────────────────── */

.toolkit__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-32);
}

.toolkit__group {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
}

.toolkit__group-title {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-text-tertiary);
  padding-bottom: var(--s-12);
  border-bottom: 1px solid var(--c-border);
}

.toolkit__list {
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}

.toolkit__item {
  font-size: var(--ts-sm);
  color: var(--c-text-secondary);
  line-height: var(--lh-normal);
}


/* ─────────────────────────────────────────────
   CURRENTLY EXPLORING
   ───────────────────────────────────────────── */

.exploring__inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--s-64);
  align-items: start;
}

.exploring__heading {
  font-size: var(--ts-2xl);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-snug);
}

.exploring__list {
  display: flex;
  flex-direction: column;
  gap: var(--s-12);
}

.exploring__item {
  font-size: var(--ts-md);
  color: var(--c-text-secondary);
  line-height: var(--lh-normal);
  padding-left: var(--s-20);
  position: relative;
}

.exploring__item::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--c-accent);
  font-family: var(--f-mono);
  font-size: var(--ts-sm);
}


/* ─────────────────────────────────────────────
   CONTACT
   ───────────────────────────────────────────── */

.contact__inner {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--s-80);
  align-items: start;
}

.contact__heading {
  font-size: clamp(var(--ts-3xl), 4vw, var(--ts-5xl));
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--s-24);
}

.contact__text {
  font-size: var(--ts-md);
  line-height: var(--lh-relaxed);
  color: var(--c-text-secondary);
  max-width: 44ch;
  margin-bottom: var(--s-32);
}

.contact__cta {
  display: flex;
  gap: var(--s-16);
}

.contact__links {
  display: flex;
  flex-direction: column;
  gap: var(--s-16);
  padding-top: var(--s-8);
}

.contact__link-item {
  display: flex;
  align-items: baseline;
  gap: var(--s-16);
}

.contact__link-label {
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-tertiary);
  min-width: 80px;
  flex-shrink: 0;
}

.contact__link-value {
  font-size: var(--ts-sm);
  color: var(--c-text-secondary);
  transition: color var(--t-fast);
}

a.contact__link-value:hover {
  color: var(--c-accent);
}


/* ─────────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────────── */

.footer {
  padding-block: var(--s-48);
  border-top: 1px solid var(--c-border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--s-32);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}

.footer__name {
  font-family: var(--f-mono);
  font-size: var(--ts-xs);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer__tagline {
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-tertiary);
}

.footer__right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--s-12);
}

.footer__links {
  display: flex;
  gap: var(--s-24);
}

.footer__link {
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-text-tertiary);
  transition: color var(--t-fast);
}

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

.footer__legal {
  display: flex;
  gap: var(--s-24);
}

.footer__copy {
  font-family: var(--f-mono);
  font-size: var(--ts-2xs);
  color: var(--c-text-tertiary);
  letter-spacing: 0.04em;
}


/* ─────────────────────────────────────────────
   SCROLL REVEAL ANIMATION
   ───────────────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--t-slow),
    transform var(--t-slow);
}

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

.reveal-line {
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity var(--t-medium),
    transform var(--t-medium);
}

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


/* ─────────────────────────────────────────────
   DARK THEME — Section overrides
   ───────────────────────────────────────────── */

[data-theme="dark"] .project-card:hover {
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] ::selection {
  background: var(--c-accent);
  color: #1A1A1E;
}