:root {
  --bg: #0f1220;
  --bg-elev: #171a2e;
  --bg-card: #1c2038;
  --border: #2a2f4a;
  --text: #e8eaf3;
  --text-dim: #a3a8c3;
  --primary: #6c7bff;
  --primary-hover: #8290ff;
  --danger: #ff5d6c;
  --accent: #33d6a6;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, #1a1f3a 0%, var(--bg) 55%);
  color: var(--text);
  min-height: 100vh;
}

body.has-bg {
  background: transparent;
}

/* User-selected page background image (sits behind everything). */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  pointer-events: none;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 16px 24px;
  background: rgba(15, 18, 32, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  font-size: 18px;
}

.brand-mark {
  font-size: 34px;
  line-height: 1;
}

.brand h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.2px;
}

.tagline {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--text-dim);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.search-box input,
#sortSelect {
  background: var(--bg-elev);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
  transition: border-color 0.15s ease;
}

.search-box input {
  width: 220px;
}

.search-box input:focus,
#sortSelect:focus {
  border-color: var(--primary);
}

/* Buttons */
.btn {
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.05s ease;
}

.btn:active {
  transform: translateY(1px);
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border-color: var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--danger);
}

main {
  flex: 1;
  min-width: 0;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

/* Layout & sidebar */
.layout {
  display: flex;
  align-items: flex-start;
}

.sidebar {
  position: sticky;
  top: 81px;
  width: 240px;
  flex-shrink: 0;
  padding: 20px 12px;
  border-right: 1px solid var(--border);
  height: calc(100vh - 81px);
  overflow-y: auto;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px 10px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text-dim);
}

.new-folder-btn {
  width: 100%;
  margin-bottom: 12px;
  font-size: 14px;
}

.folder-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.folder-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.folder-btn {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  border: none;
  color: var(--text);
  text-align: left;
  padding: 9px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.12s ease;
}

.folder-btn:hover {
  background: var(--bg-elev);
}

.folder-item.active .folder-btn {
  background: rgba(108, 123, 255, 0.16);
  color: #cfd4ff;
}

.folder-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-count {
  font-size: 12px;
  color: var(--text-dim);
}

.folder-del {
  flex: 0 0 auto;
  opacity: 0.5;
  padding: 5px 7px;
  transition: opacity 0.12s ease;
}

.folder-item:hover .folder-del {
  opacity: 0.9;
}

.folder-del:hover {
  opacity: 1;
  border-color: var(--danger);
}

/* Banner */
.banner {
  background: rgba(255, 93, 108, 0.12);
  border: 1px solid rgba(255, 93, 108, 0.4);
  color: #ffd0d5;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 16px;
}

.banner code {
  background: rgba(0, 0, 0, 0.3);
  padding: 1px 6px;
  border-radius: 5px;
}

/* Drop zone */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
  background: var(--bg-elev);
}

.drop-zone:hover,
.drop-zone:focus-visible {
  border-color: var(--primary);
  outline: none;
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(51, 214, 166, 0.08);
}

.drop-icon {
  font-size: 40px;
}

.drop-title {
  margin: 10px 0 4px;
  font-size: 17px;
  font-weight: 600;
}

.drop-sub {
  margin: 0;
  color: var(--text-dim);
  font-size: 14px;
}

.link {
  color: var(--primary);
  text-decoration: underline;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 20px 2px 12px;
}

.stats {
  color: var(--text-dim);
  font-size: 14px;
}

.stats .dot {
  margin: 0 8px;
  opacity: 0.5;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-dim);
}

.empty-icon {
  font-size: 52px;
}

.empty-state h2 {
  margin: 12px 0 6px;
  color: var(--text);
}

/* Gallery */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 18px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
  transition: transform 0.15s ease, border-color 0.15s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
}

.card-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #0b0e1a;
  cursor: zoom-in;
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.card:hover .card-media img {
  transform: scale(1.05);
}

.card-progress {
  position: absolute;
  inset: auto 0 0 0;
  height: 4px;
  background: rgba(0, 0, 0, 0.4);
}

.card-progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  transition: width 0.2s ease;
}

.card-move {
  flex: 1.4;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 8px;
  font-size: 12px;
  padding: 6px 4px;
  cursor: pointer;
}

.card-body {
  padding: 10px 12px 6px;
}

.card-name {
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  padding: 4px 6px;
  border-radius: 8px;
  outline: none;
}

.card-name:hover,
.card-name:focus {
  border-color: var(--border);
  background: var(--bg-elev);
}

.card-meta {
  padding: 2px 6px 4px;
  font-size: 12px;
  color: var(--text-dim);
}

.card-actions {
  display: flex;
  gap: 4px;
  padding: 6px 8px 10px;
  margin-top: auto;
}

.icon-btn {
  flex: 1;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.icon-btn:hover {
  background: #232848;
}

.icon-btn.delete:hover {
  border-color: var(--danger);
}

.icon-btn.share {
  background: rgba(37, 211, 102, 0.15);
  border-color: rgba(37, 211, 102, 0.4);
}

.icon-btn.share:hover {
  background: rgba(37, 211, 102, 0.28);
  border-color: #25d366;
}

/* Lightbox */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(6, 8, 16, 0.94);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-figure {
  margin: 0;
  max-width: 90vw;
  max-height: 90vh;
  text-align: center;
}

.lightbox-figure img {
  max-width: 90vw;
  max-height: 80vh;
  border-radius: 10px;
  box-shadow: var(--shadow);
  object-fit: contain;
}

.lightbox-figure figcaption {
  margin-top: 12px;
  color: var(--text);
  font-size: 15px;
}

.lightbox-close,
.lightbox-nav {
  position: absolute;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  border-radius: 50%;
  width: 46px;
  height: 46px;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease;
}

.lightbox-close:hover,
.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.18);
}

.lightbox-close {
  top: 20px;
  right: 24px;
}

.lightbox-delete {
  position: absolute;
  top: 20px;
  left: 24px;
  background: rgba(255, 93, 108, 0.15);
  border: 1px solid rgba(255, 93, 108, 0.5);
  color: #ffd0d5;
  cursor: pointer;
  border-radius: 999px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  transition: background 0.15s ease;
}

.lightbox-delete:hover {
  background: rgba(255, 93, 108, 0.3);
  border-color: var(--danger);
}

.lightbox-nav.prev {
  left: 24px;
}

.lightbox-nav.next {
  right: 24px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 20px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  z-index: 60;
  font-size: 14px;
  animation: toastIn 0.2s ease;
}

.toast[hidden] {
  display: none;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translate(-50%, 10px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@media (max-width: 600px) {
  .search-box input {
    width: 140px;
  }
  main {
    padding: 16px;
  }
}

@media (max-width: 820px) {
  .menu-toggle {
    display: flex;
  }
  .sidebar {
    position: fixed;
    top: 81px;
    left: 0;
    z-index: 20;
    background: var(--bg-elev);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: var(--shadow);
  }
  .sidebar.open {
    transform: translateX(0);
  }
}

/* Role-based visibility: hide write controls unless the body is marked admin. */
body:not(.is-admin) .admin-only {
  display: none !important;
}

/* Auth screen */
.auth-screen {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(1000px 500px at 50% -10%, #1a1f3a 0%, var(--bg) 60%);
}

.auth-screen[hidden] {
  display: none;
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 28px 26px;
}

.auth-brand {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
}

.auth-sub {
  margin: 6px 0 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
}

.auth-tabs {
  display: flex;
  gap: 6px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  margin-bottom: 18px;
}

.auth-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-dim);
  padding: 9px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.auth-tab.active {
  background: var(--primary);
  color: #fff;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.auth-form[hidden] {
  display: none;
}

.auth-form input {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  outline: none;
}

.auth-form input:focus {
  border-color: var(--primary);
}

.auth-form .btn {
  margin-top: 4px;
}

.auth-error {
  color: var(--danger);
  font-size: 13px;
  min-height: 16px;
  margin: 12px 0 0;
  text-align: center;
}

.auth-hint {
  margin: 6px 0 0;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
}

.auth-link {
  background: none;
  border: none;
  color: var(--primary);
  font-size: 13px;
  cursor: pointer;
  padding: 2px;
  text-decoration: underline;
  align-self: center;
}

.auth-link:hover {
  color: var(--primary-hover);
}

/* Header user box */
.user-box {
  display: flex;
  align-items: center;
  gap: 8px;
}

.user-box[hidden] {
  display: none;
}

.user-email {
  font-size: 13px;
  color: var(--text-dim);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.role-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--border);
  color: var(--text-dim);
}

.role-badge.admin {
  background: rgba(51, 214, 166, 0.18);
  color: var(--accent);
}

/* Welcome screen */
.welcome-screen {
  position: fixed;
  inset: 0;
  z-index: 90;
  overflow-y: auto;
  background: radial-gradient(1000px 500px at 50% -10%, #1a1f3a 0%, var(--bg) 60%);
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  transition: background-image 0.6s ease-in-out;
}

.welcome-screen[hidden] {
  display: none;
}

.welcome-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px;
}

.welcome-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 24px;
}

.welcome-brand {
  font-size: 22px;
  font-weight: 700;
}

.welcome-hero {
  text-align: center;
  padding: 40px 20px 48px;
}

.welcome-hero h1 {
  margin: 0 0 10px;
  font-size: 30px;
}

.welcome-hero #welcomeEmail {
  color: var(--primary);
}

.welcome-tagline {
  color: var(--text-dim);
  margin: 14px 0 26px;
}

.welcome-cta {
  font-size: 16px;
  padding: 14px 28px;
}

/* User management */
.user-admin {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  box-shadow: var(--shadow);
}

.user-admin-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.user-admin-head h2 {
  margin: 0;
  font-size: 18px;
}

.user-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.user-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
}

.user-row-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.user-row-email {
  font-size: 14px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-row-actions {
  display: flex;
  gap: 8px;
}

.user-row-actions .btn {
  padding: 7px 12px;
  font-size: 13px;
}

.user-delete:hover:not(:disabled) {
  border-color: var(--danger);
  color: var(--danger);
}

.user-row-actions .btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}