/* ============================================================
   Minimal White — Impeccable Design System
   Pure, refined, intentional.
   ============================================================ */

/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --bg-hover: #f5f5f4;
  --surface: #ffffff;
  --text: #111111;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border: #e5e5e3;
  --border-hover: #d4d4d1;
  --accent: #111111;
  --radius: 6px;
  --radius-sm: 4px;
  --max-width: 720px;
  --nav-height: 56px;
}

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

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

body {
  font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-weight: 400;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Typography ─────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

a {
  color: var(--text);
  text-decoration: none;
  transition: opacity 0.15s ease;
}

a:hover { opacity: 0.6; }

a:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 2px;
  border-radius: 2px;
}

code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.875em;
  background: var(--bg-subtle);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

/* ── Layout ─────────────────────────────────────────────── */
.site-wrapper {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Navigation ─────────────────────────────────────────── */
.site-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: 2rem;
}

.site-nav a {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
  transition: color 0.15s ease;
}

.site-nav a:hover { opacity: 1; color: var(--text); }

.site-nav a.is-active {
  color: var(--text);
}

/* ── Header ─────────────────────────────────────────────── */
.site-header {
  padding: 5rem 24px 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
}

.site-header h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.site-header p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 480px;
}

.site-header .header-meta {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Main Content ─────────────────────────────────────────── */
.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 24px 6rem;
}

/* ── Page Header ─────────────────────────────────────────── */
.page-header {
  margin-bottom: 3rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* ── Cards & Surfaces ─────────────────────────────────────── */
.card {
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.card:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
}

/* ── Section ─────────────────────────────────────────────── */
.section {
  margin-bottom: 4rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.section-title {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.section-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Grid ────────────────────────────────────────────────── */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.grid > * {
  background: var(--bg);
}

/* ── List / Link Row ─────────────────────────────────────── */
.link-list {
  display: flex;
  flex-direction: column;
}

.link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  gap: 1rem;
  transition: background 0.15s ease;
}

.link-item:last-child { border-bottom: none; }
.link-item:hover { background: var(--bg-subtle); margin: 0 -24px; padding-left: 24px; padding-right: 24px; }

.link-item .item-main { flex: 1; min-width: 0; }

.link-item .item-name {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.link-item .item-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.link-item .item-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ── Tags ────────────────────────────────────────────────── */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 2rem;
  color: var(--text-secondary);
  transition: background 0.15s ease, border-color 0.15s ease;
}

.tag:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
  opacity: 1;
}

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  transition: all 0.15s ease;
  cursor: pointer;
}

.btn:hover { opacity: 1; background: var(--bg-hover); border-color: var(--border-hover); }

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.btn-primary:hover { background: #333; border-color: #333; }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 24px;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ── Stats Grid (shared: home, projects, about) ──────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 3rem;
}

.stat {
  background: var(--bg);
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.stat-num {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Section (page-level, extends .section-header) ───── */
.page-section {
  margin-bottom: 4rem;
}

.section-more {
  font-size: 0.8125rem;
  color: var(--text-secondary);
}

/* ── Project Card Grid ───────────────────────────────── */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.project-card {
  background: var(--bg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: background 0.15s ease;
  animation: fadeUp 0.4s ease-out both;
}

.project-card:hover {
  background: var(--bg-subtle);
}

.project-type {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.project-card h3 {
  font-size: 1rem;
  font-weight: 600;
}

.project-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.5rem;
}

.project-tags span {
  font-size: 0.6875rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 2rem;
  color: var(--text-muted);
}

/* ── Project List (flat rows) ────────────────────────── */
.project-list {
  display: flex;
  flex-direction: column;
}

.project-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.15s ease;
}

.project-item:last-child { border-bottom: none; }

.project-item:hover {
  background: var(--bg-subtle);
  margin: 0 -24px;
  padding-left: 24px;
  padding-right: 24px;
}

.project-item .item-main { flex: 1; min-width: 0; }

.project-item .item-main h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.project-item .item-main p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-item .item-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  flex-shrink: 0;
}

.project-item .item-tags span {
  font-size: 0.6875rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  border-radius: 2rem;
  color: var(--text-muted);
}

.project-item .item-arrow {
  font-size: 1rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ── Ability Grid (about) ────────────────────────────── */
.ability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.ability-card {
  background: var(--bg);
  padding: 1.5rem;
}

.ability-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.ability-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ── Reason List (about) ─────────────────────────────── */
.reason-list {
  display: flex;
  flex-direction: column;
}

.reason-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.reason-item:last-child { border-bottom: none; }

.reason-num {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  width: 2rem;
}

.reason-item h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.reason-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* ── Connect Grid (about) ────────────────────────────── */
.connect-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.connect-card {
  background: var(--bg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: background 0.15s ease;
}

.connect-card:hover { background: var(--bg-subtle); }

.connect-icon { font-size: 1.5rem; }

.connect-card h3 {
  font-size: 0.9375rem;
  font-weight: 600;
}

.connect-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin: 0;
}

/* ── Responsive (page-level additions) ───────────────── */
@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .project-item { flex-direction: column; align-items: flex-start; }
  .project-item .item-tags { display: none; }
}

/* ── Animations ──────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-up {
  animation: fadeUp 0.5s ease-out both;
}

/* ── Home Page ────────────────────────────────────────── */
.home { max-width: 100%; }

.home-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.home-header h1 {
  font-size: clamp(2.5rem, 6vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.5s ease-out both;
}

.home-tagline {
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  animation: fadeUp 0.5s ease-out 0.05s both;
}

.home-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 1.5rem;
  animation: fadeUp 0.5s ease-out 0.1s both;
}

.home-desc strong { color: var(--text); }

.home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: fadeUp 0.5s ease-out 0.15s both;
}

/* ── Audience Grid (home) ──────────────────────────────── */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.audience-card {
  background: var(--bg);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  transition: background 0.15s ease;
}

.audience-card:hover { background: var(--bg-subtle); }

.audience-icon { font-size: 1.25rem; flex-shrink: 0; }

.audience-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.audience-card p {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ── Collab List (home) ────────────────────────────────── */
.collab-list {
  display: flex;
  flex-direction: column;
}

.collab-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
}

.collab-item:last-child { border-bottom: none; }

.collab-item h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.collab-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── About Page ────────────────────────────────────────── */
.about { max-width: 100%; }

.about-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.about-header h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.5s ease-out both;
}

.about-tagline {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  animation: fadeUp 0.5s ease-out 0.05s both;
}

.about-section {
  margin-bottom: 4rem;
}

.about-section h2 {
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.about-section p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.about-section p:last-child { margin-bottom: 0; }

.about-section strong { color: var(--text); }

/* ── Projects Page ─────────────────────────────────────── */
.projects { max-width: 100%; }

.projects-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 3rem;
}

.projects-header h1 {
  font-size: clamp(2rem, 5vw, 2.75rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  animation: fadeUp 0.5s ease-out both;
}

.projects-tagline {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  animation: fadeUp 0.5s ease-out 0.05s both;
}

.projects-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  animation: fadeUp 0.5s ease-out 0.1s both;
}

.projects-actions {
  display: flex;
  gap: 0.75rem;
  animation: fadeUp 0.5s ease-out 0.15s both;
}

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 640px) {
  .site-header { padding: 3.5rem 20px 2rem; }
  .site-main { padding: 2rem 20px 4rem; }
  .site-footer { padding: 1.5rem 20px; flex-direction: column; gap: 0.5rem; text-align: center; }
  .grid { grid-template-columns: 1fr; }
  .site-nav { gap: 1rem; }
  .site-header .header-meta { flex-direction: column; gap: 0.5rem; }
  .home-header { padding: 3rem 0 2rem; }
  .about-header { padding: 3rem 0 2rem; }
  .projects-header { padding: 3rem 0 2rem; }
}