/* ============================================
   ArtFair View — Gagosian-style Redesign
   Palette: Pure White / Black / Mid-Grey
   Type: Space Grotesk (bold) / Inter (body)
   ============================================ */

:root {
  --color-white: #FFFFFF;
  --color-off-white: #F8F8F8;
  --color-black: #000000;
  --color-dark: #111111;
  --color-mid: #666666;
  --color-light: #AAAAAA;
  --color-rule: #E5E5E5;
  --color-rule-dark: #D0D0D0;

  --font-display: 'Space Grotesk', Helvetica, Arial, sans-serif;
  --font-body: 'Inter', Helvetica, Arial, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 5rem;
  --space-2xl: 9rem;

  --max-width: 1280px;
  --transition: 180ms ease;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

body {
  font-family: var(--font-body);
  background: var(--color-white);
  color: var(--color-dark);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Utilities ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--space-xl); }
}

.section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-rule);
}

@media (min-width: 768px) {
  .section { padding: var(--space-2xl) 0; }
}

.section-header {
  max-width: 900px;
  margin: 0 0 var(--space-xl);
}

.section-header--center {
  text-align: center;
  margin: 0 auto var(--space-xl);
}

.section-eyebrow {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-mid);
  margin-bottom: var(--space-md);
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.08;
  color: var(--color-dark);
  letter-spacing: -0.02em;
}

.section-sub {
  font-size: 0.875rem;
  color: var(--color-mid);
  margin-top: var(--space-sm);
  line-height: 1.7;
}

/* ---- Buttons ---- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-lg);
  background: var(--color-dark);
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--color-dark);
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
}

.btn-primary:hover {
  background: var(--color-white);
  color: var(--color-dark);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 var(--space-lg);
  background: transparent;
  color: var(--color-dark);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--color-dark);
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
}

.btn-ghost:hover {
  background: var(--color-dark);
  color: var(--color-white);
}

/* ---- Navigation ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--color-rule);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .nav-inner { padding: 0 var(--space-xl); }
}

.logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-cta {
  min-height: 44px;
  padding: 0 var(--space-md);
  background: var(--color-dark);
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1px solid var(--color-dark);
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
}

.nav-cta:hover {
  background: var(--color-white);
  color: var(--color-dark);
}

/* ---- Hero ---- */
.hero {
  padding-top: calc(60px + var(--space-xl));
  padding-bottom: var(--space-xl);
  background: var(--color-white);
  overflow: hidden;
}

@media (min-width: 1024px) {
  .hero {
    padding-top: calc(60px + var(--space-2xl));
    padding-bottom: var(--space-2xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
    padding-left: var(--space-xl);
    padding-right: var(--space-xl);
  }
}

.hero-inner {
  padding: 0 var(--space-md);
}

@media (min-width: 1024px) {
  .hero-inner { padding: 0; }
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-mid);
  margin-bottom: var(--space-lg);
  display: block;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  font-weight: 700;
  line-height: 1.05;
  color: var(--color-dark);
  letter-spacing: -0.025em;
  margin-bottom: var(--space-lg);
}

.hero-sub {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-mid);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
  max-width: 460px;
  font-weight: 400;
}

.br-desktop { display: none; }

@media (min-width: 768px) {
  .br-desktop { display: block; }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

/* ---- Hero Visual ---- */
.hero-visual {
  padding: var(--space-xl) var(--space-md) 0;
}

@media (min-width: 1024px) {
  .hero-visual { padding: 0; }
}

.art-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  max-width: 480px;
  margin: 0 auto;
}

@media (min-width: 1024px) {
  .art-grid { max-width: none; }
}

.art-card {
  background: var(--color-off-white);
  border: 1px solid var(--color-rule);
  overflow: hidden;
}

.art-card--tall { grid-row: span 2; }

.art-img {
  width: 100%;
  background: var(--color-rule);
}

.art-card--tall .art-img { aspect-ratio: 3/4; }
.art-card:not(.art-card--tall) .art-img { aspect-ratio: 4/3; }

.art-img--1 {
  background: linear-gradient(160deg, #D8D0C8 0%, #B8B0A8 50%, #989088 100%);
}

.art-img--2 {
  background: linear-gradient(135deg, #C8C8C8 0%, #A0A0A0 60%, #808080 100%);
}

.art-img--3 {
  background: linear-gradient(45deg, #E0DADA 0%, #C0B8B0 50%, #A09890 100%);
}

.art-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.art-meta {
  padding: 10px 12px 12px;
  border-top: 1px solid var(--color-rule);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.art-artist {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-dark);
  letter-spacing: 0.01em;
}

.art-fair {
  font-size: 0.62rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-light);
  text-transform: uppercase;
}

/* ---- Explore ---- */
.explore {
  background: var(--color-white);
}

.explore-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border: 1px solid var(--color-rule);
}

@media (min-width: 768px) {
  .explore-grid {
    grid-template-columns: 1fr 1px 1fr;
  }
}

.explore-card {
  padding: var(--space-xl) var(--space-lg);
}

@media (min-width: 768px) {
  .explore-card { padding: var(--space-xl); }
}

.explore-card:first-child {
  border-bottom: 1px solid var(--color-rule);
}

@media (min-width: 768px) {
  .explore-card:first-child { border-bottom: none; }
}

.explore-icon {
  width: 40px;
  height: 40px;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.explore-icon svg {
  width: 100%;
  height: 100%;
}

.explore-title {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
  color: var(--color-dark);
}

.explore-desc {
  font-size: 0.875rem;
  color: var(--color-mid);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.explore-list li {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-mid);
  padding: 14px 0;
  border-bottom: 1px solid var(--color-rule);
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.01em;
}

.explore-list li::before {
  content: '';
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-dark);
  flex-shrink: 0;
}

.explore-list li:last-child { border-bottom: none; }

/* Vertical divider between explore cards */
.explore-divider {
  background: var(--color-rule);
  display: none;
}

@media (min-width: 768px) {
  .explore-divider { display: block; }
}

/* ---- Coverage ---- */
.coverage {
  background: var(--color-white);
}

.fairs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--color-rule);
}

@media (min-width: 768px) {
  .fairs-grid { grid-template-columns: repeat(4, 1fr); }
}

.fair-item {
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-right: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
  transition: background var(--transition);
}

.fair-item:hover { background: var(--color-off-white); }

@media (min-width: 768px) {
  .fair-item:nth-child(4n) { border-right: none; }
  .fair-item:nth-last-child(-n+4) { border-bottom: none; }
}

@media (max-width: 767px) {
  .fair-item:nth-child(2n) { border-right: none; }
  .fair-item:nth-last-child(-n+2) { border-bottom: none; }
}

.fair-item--featured {
  background: var(--color-off-white);
}

.fair-item--more {
  background: var(--color-dark);
  color: var(--color-white);
  align-items: flex-start;
  justify-content: flex-end;
}

.fair-item--more:hover {
  background: #222222;
}

.fair-item--more .fair-name,
.fair-item--more .fair-loc {
  color: inherit;
}

.fair-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-display);
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-mid);
  margin-bottom: 4px;
}

.fair-badge::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #3A7A3A;
  flex-shrink: 0;
}

.fair-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  letter-spacing: -0.01em;
}

.fair-loc {
  font-size: 0.68rem;
  color: var(--color-light);
  letter-spacing: 0.04em;
  font-weight: 400;
}

/* ---- Users ---- */
.users {
  background: var(--color-dark);
}

.users .section-eyebrow {
  color: var(--color-light);
}

.users .section-title {
  color: var(--color-white);
}

.users-grid {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid #333333;
}

@media (min-width: 640px) {
  .users-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1024px) {
  .users-grid { grid-template-columns: repeat(4, 1fr); }
}

.user-card {
  padding: var(--space-xl) var(--space-lg);
  border-right: 1px solid #333333;
  border-bottom: 1px solid #333333;
  transition: background var(--transition);
}

.user-card:hover { background: #1A1A1A; }

@media (min-width: 1024px) {
  .user-card:nth-child(4n) { border-right: none; }
  .user-card:nth-last-child(-n+4) { border-bottom: none; }
}

@media (min-width: 640px) and (max-width: 1023px) {
  .user-card:nth-child(2n) { border-right: none; }
  .user-card:nth-last-child(-n+2) { border-bottom: none; }
}

@media (max-width: 639px) {
  .user-card { border-right: none; }
  .user-card:last-child { border-bottom: none; }
}

.user-number {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: #444444;
  margin-bottom: var(--space-lg);
  text-transform: uppercase;
}

.user-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-sm);
}

.user-desc {
  font-size: 0.82rem;
  color: #777777;
  line-height: 1.85;
  font-weight: 400;
}

/* ---- Signup ---- */
.signup {
  background: var(--color-white);
}

.signup-inner {
  max-width: 640px;
}

.signup-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  line-height: 1.1;
}

.signup-sub {
  font-size: 0.875rem;
  color: var(--color-mid);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.signup-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

@media (min-width: 480px) {
  .form-row { flex-direction: row; }
}

.form-input {
  flex: 1;
  min-height: 48px;
  padding: 0 var(--space-md);
  background: var(--color-white);
  border: 1px solid var(--color-rule-dark);
  border-radius: 0;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-dark);
  transition: border-color var(--transition);
  -webkit-appearance: none;
  appearance: none;
}

.form-input::placeholder { color: var(--color-light); }

.form-input:focus {
  outline: none;
  border-color: var(--color-dark);
}

.form-input.error {
  border-color: #CC4444;
}

.form-submit {
  white-space: nowrap;
  flex-shrink: 0;
}

.form-note {
  font-size: 0.7rem;
  color: var(--color-light);
  letter-spacing: 0.04em;
  font-family: var(--font-body);
}

.form-success {
  display: none;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-dark);
  padding: var(--space-md) var(--space-md);
  border: 1px solid var(--color-dark);
  letter-spacing: 0.01em;
}

.form-success.visible {
  display: block;
}

/* ---- Footer ---- */
.footer {
  background: var(--color-dark);
  padding: var(--space-lg) 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-copy {
  font-size: 0.68rem;
  color: #555555;
  letter-spacing: 0.04em;
}

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---- Accessibility ---- */
:focus-visible {
  outline: 2px solid var(--color-dark);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .fade-in { opacity: 1; transform: none; }
}