/* =========================================================================
   assets/css/style.css
   Dark, glassmorphism theme for the Photo Gallery.
   ========================================================================= */

:root {
  --bg-1: #0b0d14;
  --bg-2: #121521;
  --accent: #7c6cff;
  --accent-2: #4fd1c5;
  --text: #eef0f7;
  --text-dim: #9aa0b4;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.12);
  --danger: #ff5470;
  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: radial-gradient(circle at 20% 20%, #1a1f33 0%, var(--bg-1) 55%),
              radial-gradient(circle at 80% 80%, #241a33 0%, var(--bg-1) 60%);
  background-color: var(--bg-1);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--shadow);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #5a48e0);
  color: #fff;
  box-shadow: 0 6px 20px rgba(124, 108, 255, 0.35);
}
.btn-primary:hover { box-shadow: 0 8px 26px rgba(124, 108, 255, 0.5); }
.btn-ghost {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text);
}
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-block { width: 100%; }

/* ---------- Auth pages ---------- */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}
.auth-wrap { width: 100%; max-width: 380px; }
.auth-card {
  padding: 40px 32px;
  text-align: center;
  animation: floatIn .5s ease;
}
.auth-icon { font-size: 40px; margin-bottom: 8px; }
.auth-card h1 { margin: 0 0 6px; font-size: 22px; }
.auth-sub { color: var(--text-dim); margin: 0 0 24px; font-size: 14px; }

.input-field {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.05);
  color: var(--text);
  font-size: 15px;
  margin-bottom: 16px;
  outline: none;
  transition: border-color .15s ease, background .15s ease;
}
.input-field:focus { border-color: var(--accent); background: rgba(255,255,255,0.08); }

.alert {
  border-radius: var(--radius-md);
  padding: 12px 14px;
  margin-bottom: 18px;
  font-size: 14px;
  text-align: left;
}
.alert-error {
  background: rgba(255, 84, 112, 0.12);
  border: 1px solid rgba(255, 84, 112, 0.4);
  color: #ffb3c0;
}
.alert-warning {
  margin-top: 6px;
  color: #ffd27a;
  font-weight: 600;
}

@keyframes floatIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Top bar ---------- */
.top-bar {
  position: sticky;
  top: 12px;
  z-index: 20;
  margin: 12px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.brand { margin: 0; font-size: 18px; }
.top-actions { display: flex; align-items: center; gap: 12px; }
.search-box input {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.06);
  color: var(--text);
  min-width: 220px;
  outline: none;
}
.search-box input:focus { border-color: var(--accent); }

/* ---------- Gallery grid (masonry via columns) ---------- */
.gallery-main { padding: 0 12px 60px; max-width: 1600px; margin: 0 auto; }

.gallery-grid {
  column-count: 2;
  column-gap: 10px;
}
@media (min-width: 560px)  { .gallery-grid { column-count: 3; } }
@media (min-width: 860px)  { .gallery-grid { column-count: 4; } }
@media (min-width: 1180px) { .gallery-grid { column-count: 5; } }
@media (min-width: 1500px) { .gallery-grid { column-count: 6; } }

.photo-card {
  break-inside: avoid;
  margin-bottom: 10px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  cursor: pointer;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  opacity: 0;
  transform: translateY(10px);
  animation: cardIn .4s ease forwards;
}
@keyframes cardIn { to { opacity: 1; transform: translateY(0); } }

.photo-card img {
  display: block;
  width: 100%;
  height: auto;
  transition: transform .35s ease, filter .35s ease;
  background: #1a1e2c;
}
.photo-card:hover img { transform: scale(1.04); filter: brightness(1.05); }

.photo-card .card-overlay {
  position: absolute;
  inset: auto 0 0 0;
  padding: 10px 12px;
  background: linear-gradient(to top, rgba(0,0,0,0.65), transparent);
  font-size: 12px;
  color: #fff;
  opacity: 0;
  transition: opacity .2s ease;
}
.photo-card:hover .card-overlay { opacity: 1; }

.empty-state { text-align: center; color: var(--text-dim); padding: 60px 0; }

.load-more-wrap { display: flex; justify-content: center; margin-top: 30px; }

.spinner {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Fullscreen viewer ---------- */
.viewer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 7, 12, 0.94);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
}
.viewer-stage {
  max-width: 92vw;
  max-height: 82vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
.viewer-stage img {
  max-width: 92vw;
  max-height: 82vh;
  object-fit: contain;
  touch-action: none;
  user-select: none;
  -webkit-user-drag: none;
  -khtml-user-drag: none;
  -moz-user-drag: none;
  cursor: grab;
  transition: transform .15s ease;
}
.viewer-close, .viewer-nav {
  position: absolute;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: #fff;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(10px);
}
.viewer-close {
  top: 20px; right: 20px;
  width: 44px; height: 44px;
  font-size: 18px;
}
.viewer-nav {
  top: 50%;
  transform: translateY(-50%);
  width: 52px; height: 52px;
  font-size: 26px;
}
.viewer-prev { left: 16px; }
.viewer-next { right: 16px; }
.viewer-nav:hover, .viewer-close:hover { background: rgba(255,255,255,0.16); }

.viewer-meta {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  text-align: center;
  color: #d8dbe8;
  font-size: 13px;
  display: flex;
  gap: 14px;
}

/* ---------- Toasts ---------- */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 200;
}
.toast {
  padding: 12px 18px;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px);
  color: #fff;
  font-size: 14px;
  box-shadow: var(--shadow);
  animation: toastIn .25s ease;
}
.toast.success { border-color: rgba(79, 209, 197, 0.5); }
.toast.error { border-color: rgba(255, 84, 112, 0.5); }
@keyframes toastIn { from { opacity: 0; transform: translateX(20px);} to { opacity: 1; transform: translateX(0);} }

@media (max-width: 560px) {
  .search-box input { min-width: 140px; }
  .top-bar { padding: 10px 14px; }
}