@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --primary-color: #3b82f6;
  --primary-hover: #2563eb;
  
  --success-color: #10b981;
  --success-hover: #059669;
  --success-glow: rgba(16, 185, 129, 0.35);
  
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --danger-glow: rgba(239, 68, 68, 0.35);
  
  --glass-bg: rgba(15, 23, 42, 0.85);
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-main: 0 10px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* PUBLIC SLIDESHOW VIEW */
.slideshow-body {
  background-color: #000;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  position: relative;
}

.slideshow-container {
  width: 100vw;
  height: 100vh;
  position: relative;
  overflow: hidden;
  background: #000;
}

.slide-item {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
  display: flex;
  justify-content: center;
  align-items: center;
}

.slide-item.active {
  opacity: 1;
}

.slide-item img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
  user-select: none;
  pointer-events: none;
}

.empty-slideshow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  text-align: center;
  color: var(--text-secondary);
  padding: 2rem;
}

.empty-slideshow svg {
  width: 64px;
  height: 64px;
  margin-bottom: 1rem;
  opacity: 0.4;
}

/* LOGIN VIEW */
.login-wrapper {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-main);
  text-align: center;
}

.login-icon {
  width: 56px;
  height: 56px;
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-color);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.login-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.form-input {
  width: 100%;
  padding: 0.85rem 1rem;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 1rem;
  outline: none;
  transition: all 0.2s ease;
}

.form-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-primary {
  width: 100%;
  padding: 0.85rem;
  background: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

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

.btn-primary:active {
  transform: scale(0.99);
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ADMIN DASHBOARD VIEW */
.admin-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.admin-header {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 1rem 2rem;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.brand-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-badge {
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: white;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  letter-spacing: 0.5px;
}

.brand-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.capacity-badge {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.capacity-badge span.highlight {
  color: #60a5fa;
  font-weight: 700;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.admin-main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem;
}

/* Nav Tabs */
.nav-tabs {
  display: flex;
  gap: 0.75rem;
  background: var(--bg-secondary);
  padding: 0.4rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin-bottom: 2rem;
  width: fit-content;
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.tab-btn:hover {
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

/* Tab Panels */
.tab-panel {
  display: none;
  animation: fadeIn 0.25s ease-in-out;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Settings Bar */
.control-bar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.interval-control {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.interval-input {
  width: 70px;
  padding: 0.45rem 0.5rem;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  text-align: center;
  font-weight: 600;
}

/* Image Grid */
.images-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 300px));
  gap: 1.5rem;
  justify-content: start;
  margin-bottom: 2.5rem;
}

.image-card {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 3px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.2);
  user-select: none;
  max-width: 300px;
}

.image-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
}

.image-thumb-wrap {
  position: relative;
  width: 100%;
  height: 200px;
  background: #0b0f19;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.image-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.image-card:hover .image-thumb-wrap img {
  transform: scale(1.05);
}

.image-meta {
  padding: 0.75rem 1rem;
  background: var(--bg-card);
  border-top: 1px solid var(--border-color);
}

.image-name {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Badges */
.badge-indicator {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.7);
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  z-index: 10;
}

.select-mode .image-card.is-selected {
  border-color: var(--success-color);
  box-shadow: 0 0 16px var(--success-glow);
}

.select-mode .image-card.is-selected .badge-indicator {
  opacity: 1;
  transform: scale(1);
  background: var(--success-color);
  color: white;
}

.delete-mode .image-card.is-marked-delete {
  border-color: var(--danger-color);
  box-shadow: 0 0 16px var(--danger-glow);
}

.delete-mode .image-card.is-marked-delete .badge-indicator {
  opacity: 1;
  transform: scale(1);
  background: var(--danger-color);
  color: white;
}

/* Upload Panel */
.upload-container {
  max-width: 680px;
  margin: 0 auto;
}

.dropzone {
  border: 2px dashed rgba(59, 130, 246, 0.4);
  background: rgba(30, 41, 59, 0.4);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary-color);
  background: rgba(59, 130, 246, 0.08);
}

.dropzone-icon {
  width: 64px;
  height: 64px;
  color: var(--primary-color);
  margin-bottom: 1rem;
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.dropzone-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.file-input-hidden {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.file-preview-list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-preview-item {
  background: var(--bg-secondary);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.875rem;
}

/* Bottom Action Bar */
.bottom-bar {
  position: sticky;
  bottom: 1.5rem;
  z-index: 40;
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.btn-save {
  background: var(--success-color);
  color: white;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.95rem 2.75rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  box-shadow: 0 10px 20px -5px var(--success-glow);
  transition: all 0.2s ease;
}

.btn-save:hover {
  background: var(--success-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 24px -5px var(--success-glow);
}

.btn-delete {
  background: var(--danger-color);
  color: white;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.95rem 2.75rem;
  border-radius: 9999px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  box-shadow: 0 10px 20px -5px var(--danger-glow);
  transition: all 0.2s ease;
}

.btn-delete:hover {
  background: var(--danger-hover);
  transform: translateY(-2px);
  box-shadow: 0 14px 24px -5px var(--danger-glow);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 280px;
  max-width: 420px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-main);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  animation: slideInRight 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: var(--text-primary);
  font-size: 0.9rem;
}

.toast.toast-success {
  border-left: 4px solid var(--success-color);
}

.toast.toast-error {
  border-left: 4px solid var(--danger-color);
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(50px); }
  to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 768px) {
  .admin-header { padding: 1rem; }
  .admin-main { padding: 1rem; }
  .nav-tabs { width: 100%; overflow-x: auto; }
  .tab-btn { flex: 1; justify-content: center; padding: 0.6rem 1rem; }
  .images-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 1rem; }
  .image-card { max-width: 100%; }
  .image-thumb-wrap { height: 140px; }
}