/* ── Variables ───────────────────────────────────────────── */
:root {
  --bg: #efefef;
  --card: #fff;
  --text: #111;
  --text-muted: #767676;
  --border: #e0e0e0;
  --red: #e60023;
  --red-hover: #ad081b;
  --radius-card: 16px;
  --radius-btn: 24px;
  --header-h: 64px;
  --shadow: 0 1px 6px rgba(0,0,0,.1), 0 3px 12px rgba(0,0,0,.07);
  --shadow-hover: 0 4px 20px rgba(0,0,0,.18);
  --transition: 0.18s ease;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ── Header ──────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
}
.header-inner {
  max-width: 1700px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 1.15rem;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo-icon { font-size: 1.4rem; }

.search-bar {
  flex: 1;
  max-width: 560px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg);
  border-radius: var(--radius-btn);
  padding: 0 16px;
  height: 44px;
  color: var(--text-muted);
  margin: 0 auto;
  transition: box-shadow var(--transition);
}
.search-bar:focus-within {
  box-shadow: 0 0 0 2px rgba(0,0,0,.12);
}
.search-bar input {
  flex: 1;
  border: none;
  background: transparent;
  font-size: .9rem;
  font-family: var(--font);
  color: var(--text);
  outline: none;
}
.search-bar input::placeholder { color: var(--text-muted); }

.btn-upload {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: var(--radius-btn);
  padding: 0 20px;
  height: 44px;
  font-size: .875rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}
.btn-upload:hover { background: var(--red-hover); transform: scale(1.02); }

/* ── Loading ──────────────────────────────────────────────── */
.loading-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  height: calc(100vh - var(--header-h));
}
.spinner, .btn-spinner {
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.spinner {
  width: 40px; height: 40px;
  border: 3px solid #ddd;
  border-top-color: var(--red);
}
.btn-spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,.35);
  border-top-color: #fff;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Empty State ──────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 100px 24px;
}
.empty-icon { font-size: 4rem; margin-bottom: 16px; }
.empty-state h2 { font-size: 1.4rem; margin-bottom: 8px; }
.empty-state p { color: var(--text-muted); margin-bottom: 28px; }

/* ── Masonry Grid ─────────────────────────────────────────── */
.masonry-grid {
  columns: 236px;
  column-gap: 16px;
  padding: 24px 16px 48px;
  max-width: 1700px;
  margin: 0 auto;
}

/* ── Photo Card ───────────────────────────────────────────── */
.photo-card {
  break-inside: avoid;
  margin-bottom: 16px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow);
  cursor: pointer;
  position: relative;
  transition: transform var(--transition), box-shadow var(--transition);
}
.photo-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.photo-card img {
  width: 100%;
  display: block;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
  background: #e8e8e8;
}

/* Hover overlay */
.card-overlay {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-card);
  background: linear-gradient(to bottom, transparent 45%, rgba(0,0,0,.55));
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 16px;
  pointer-events: none;
}
.photo-card:hover .card-overlay { opacity: 1; }
.card-overlay-text { color: #fff; }
.card-overlay-text h4 { font-size: .88rem; font-weight: 600; }
.card-overlay-text small { font-size: .75rem; opacity: .85; }

/* Card footer */
.card-footer {
  padding: 10px 14px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.card-title {
  font-size: .85rem;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.btn-like {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: .8rem;
  font-weight: 600;
  font-family: var(--font);
  padding: 5px 6px;
  border-radius: 8px;
  flex-shrink: 0;
  transition: color var(--transition), transform var(--transition);
}
.btn-like:hover { color: var(--red); transform: scale(1.1); }
.btn-like.liked { color: var(--red); }
.btn-like.liked svg { fill: var(--red); }
.btn-like svg { transition: fill var(--transition); }

/* ── Modal ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  overflow-y: auto;
  backdrop-filter: blur(6px);
}
.modal {
  background: #fff;
  border-radius: 24px;
  padding: 32px;
  width: 100%;
  max-width: 500px;
  position: relative;
  max-height: 92vh;
  overflow-y: auto;
  animation: fade-up .22s ease;
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.modal-title { font-size: 1.25rem; font-weight: 700; margin-bottom: 20px; }

.btn-icon {
  background: var(--bg);
  border: none;
  border-radius: 50%;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: background var(--transition);
}
.btn-icon:hover { background: #ddd; }
.modal-close { position: absolute; top: 20px; right: 20px; }

/* ── Drop Zone ────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 14px;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  overflow: hidden;
  margin-bottom: 20px;
  transition: border-color var(--transition), background var(--transition);
}
.drop-zone:hover,
.drop-zone.drag-over { border-color: var(--red); background: #fff5f5; }
.drop-placeholder {
  text-align: center;
  padding: 32px 24px;
  color: var(--text-muted);
  pointer-events: none;
}
.drop-placeholder svg { opacity: .45; margin-bottom: 12px; }
.drop-placeholder p { font-size: .9rem; margin-bottom: 4px; }
.drop-placeholder small { font-size: .75rem; }
.browse-link {
  color: var(--red);
  text-decoration: underline;
  cursor: pointer;
  pointer-events: all;
}
.drop-preview { width: 100%; position: relative; }
.drop-preview img { width: 100%; max-height: 300px; object-fit: cover; display: block; }
.btn-change {
  position: absolute;
  bottom: 10px; left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.68);
  color: #fff;
  border: none;
  border-radius: 20px;
  padding: 6px 16px;
  font-size: .8rem;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
}

/* ── Form ─────────────────────────────────────────────────── */
.modal-fields { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: .83rem; font-weight: 600; }
.req { color: var(--red); }
.opt { color: var(--text-muted); font-weight: 400; }
.field input,
.field textarea {
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: .9rem;
  font-family: var(--font);
  color: var(--text);
  outline: none;
  resize: none;
  transition: border-color var(--transition);
}
.field input:focus,
.field textarea:focus { border-color: var(--text); }

.btn-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  background: var(--red);
  color: #fff;
  border: none;
  border-radius: 12px;
  height: 50px;
  font-size: .95rem;
  font-weight: 700;
  font-family: var(--font);
  cursor: pointer;
  margin-top: 20px;
  transition: background var(--transition), opacity var(--transition);
}
.btn-submit:hover { background: var(--red-hover); }
.btn-submit:disabled { opacity: .6; cursor: not-allowed; }

/* ── Lightbox ─────────────────────────────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.lightbox-bg {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.88);
  backdrop-filter: blur(10px);
}
.lightbox-wrap {
  position: relative;
  background: #fff;
  border-radius: 20px;
  max-width: 1000px;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: fade-up .22s ease;
}
.lightbox-close {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 10;
  background: rgba(255,255,255,.9);
}
.lightbox-body { display: flex; flex: 1; overflow: hidden; min-height: 0; }
.lightbox-img-wrap {
  flex: 1;
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-width: 0;
}
.lightbox-img-wrap img {
  max-width: 100%;
  max-height: 88vh;
  object-fit: contain;
  display: block;
}
.lightbox-info {
  width: 280px;
  flex-shrink: 0;
  padding: 24px 20px;
  overflow-y: auto;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lightbox-info h3 { font-size: 1.05rem; font-weight: 700; }
.lightbox-info p { color: var(--text-muted); font-size: .88rem; line-height: 1.55; }
.lightbox-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.lightbox-author { font-size: .83rem; color: var(--text-muted); font-weight: 500; }

/* ── Toast ────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: #1a1a1a;
  color: #fff;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: .88rem;
  font-weight: 500;
  z-index: 999;
  white-space: nowrap;
  animation: toast-in .2s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
}
@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Utils ────────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 640px) {
  .search-bar { display: none; }
  .btn-upload span { display: none; }
  .btn-upload { padding: 0 14px; }
  .masonry-grid { columns: 160px; column-gap: 10px; padding: 12px 10px 40px; }
  .lightbox-body { flex-direction: column; }
  .lightbox-info { width: 100%; border-left: none; border-top: 1px solid var(--border); }
  .modal { padding: 24px 18px; border-radius: 20px; }
}