:root {
  --bg: #1b1a17;
  --bg-elevated: #221f1b;
  --ink: #f1ede4;
  --ink-muted: #a79e8e;
  --line: #38352e;
  --brass: #b08d57;
  --brass-dim: #8c6f45;
  --focus: #d9b77c;

  --font-display: 'Fraunces', Georgia, serif;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --spotlight-x: 50%;
  --spotlight-y: 20%;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(600px circle at var(--spotlight-x) var(--spotlight-y), rgba(176, 141, 87, 0.08), transparent 60%);
  color: var(--ink);
  font-family: var(--font-ui);
  min-height: 100vh;
}

@media (prefers-reduced-motion: no-preference) and (hover: hover) {
  body {
    transition: background-position 0.05s linear;
  }
}

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 2rem;
  background: rgba(27, 26, 23, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 0.15rem;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brass);
}

.site-header h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  letter-spacing: 0.01em;
}

.site-header__controls {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.home-button {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.01em;
  transition:
    border-color 0.15s ease,
    color 0.15s ease;
}
.home-button:hover,
.home-button:focus-visible {
  border-color: var(--brass);
  color: var(--brass);
}

.jump-field {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0.5rem 0.75rem;
  background: var(--bg-elevated);
}

.jump-field__label {
  font-size: 0.8rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

.jump-field input {
  width: 5.5rem;
  background: transparent;
  border: none;
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 0.95rem;
  outline: none;
}

.jump-field:focus-within {
  border-color: var(--focus);
}

.jump-field input::placeholder {
  color: var(--ink-muted);
  opacity: 0.6;
}

.lot-count {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

/* ---------- Grid ---------- */

main {
  padding: 2rem;
}

.status-message {
  margin: 0 0 1rem;
  min-height: 1.2em;
  font-size: 0.9rem;
  color: var(--brass);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.1rem;
}

.thumb {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-elevated);
  cursor: pointer;
  transition:
    transform 0.15s ease,
    border-color 0.15s ease;
}

.thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (hover: hover) {
  .thumb:hover {
    transform: translateY(-2px);
    border-color: var(--brass-dim);
  }
}

.thumb:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.thumb.is-highlighted {
  border-color: var(--brass);
  box-shadow: 0 0 0 1px var(--brass);
}

/* ---------- Modal ---------- */

.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(10, 9, 8, 0.96);
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal[hidden] {
  display: none;
}

.modal__stage {
  max-width: min(92vw, 1400px);
  max-height: 86vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal__stage img {
  max-width: 100%;
  max-height: 86vh;
  object-fit: contain;
  border-radius: 4px;
}

.modal__close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: var(--ink);
  font-size: 2.2rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.modal__close:hover,
.modal__close:focus-visible {
  color: var(--brass);
}

.modal__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(34, 31, 27, 0.6);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 2.2rem;
  line-height: 1;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal__nav:hover,
.modal__nav:focus-visible {
  border-color: var(--brass);
  color: var(--brass);
}

.modal__nav--prev {
  left: 1rem;
}

.modal__nav--next {
  right: 1rem;
}

.modal__position {
  position: absolute;
  bottom: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: 0.8rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}

@media (max-width: 640px) {
  .modal__nav {
    width: 2.4rem;
    height: 2.4rem;
    font-size: 1.7rem;
  }
  .modal__close {
    top: 0.75rem;
    right: 1rem;
  }
}