/* ==========================================================================
   PJR Surveying — Design System
   Dark navy theme with glassmorphism, Inter font, micro-animations
   ========================================================================== */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Brand palette */
  --navy-900: #060e1a;
  --navy-800: #0a1628;
  --navy-700: #0f1f38;
  --navy-600: #162a4a;
  --navy-500: #1e3a5f;
  --navy-400: #2a4a73;
  --navy-300: #3d6191;
  --navy-200: #5a82b0;
  --navy-100: #8dafd4;

  /* Accent */
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #60a5fa;
  --accent-glow: rgba(59, 130, 246, 0.25);

  /* Semantic */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-hover: #dc2626;

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0a1628;

  /* Surfaces */
  --surface-bg: var(--navy-900);
  --surface-card: rgba(15, 31, 56, 0.65);
  --surface-card-hover: rgba(22, 42, 74, 0.75);
  --surface-card-border: rgba(59, 130, 246, 0.12);
  --surface-input: rgba(10, 22, 40, 0.7);
  --surface-input-border: rgba(93, 130, 176, 0.2);
  --surface-input-focus: rgba(59, 130, 246, 0.3);

  /* Layout */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px var(--accent-glow);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 150ms var(--ease-out);
  --transition-base: 250ms var(--ease-out);
  --transition-slow: 400ms var(--ease-out);

  /* Glassmorphism */
  --glass-blur: blur(20px);
  --glass-bg: rgba(15, 31, 56, 0.55);
  --glass-border: rgba(255, 255, 255, 0.06);
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--surface-bg);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated gradient background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(59, 130, 246, 0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 90%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(30, 58, 95, 0.3) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--accent-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.15rem; }

.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-accent { color: var(--accent-light); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }

/* ---------- Layout ---------- */
.app-container {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.page-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* ---------- Navigation Bar ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  height: 64px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
  text-decoration: none;
}

.navbar-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  color: white;
  letter-spacing: 0.02em;
  box-shadow: 0 2px 10px var(--accent-glow);
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
  background: rgba(59, 130, 246, 0.1);
}

.nav-link.active {
  color: var(--accent-light);
}

/* ---------- Cards ---------- */
.card {
  background: var(--surface-card);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--surface-card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

.card:hover {
  background: var(--surface-card-hover);
  border-color: rgba(59, 130, 246, 0.2);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.card-static {
  composes: card;
}

.card-static:hover {
  transform: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: white;
  box-shadow: 0 2px 12px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), #1d4ed8);
  box-shadow: 0 4px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-light);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.btn-secondary:hover {
  background: rgba(59, 130, 246, 0.18);
  border-color: rgba(59, 130, 246, 0.35);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
}

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

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ---------- Forms ---------- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-input,
.form-textarea {
  padding: 0.7rem 1rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--surface-input);
  border: 1px solid var(--surface-input-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--surface-input-focus);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

/* ---------- Stats Bar ---------- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--surface-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--surface-card-border);
  border-radius: var(--radius-md);
}

.stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.4rem;
}

.stat-icon.blue {
  background: rgba(59, 130, 246, 0.12);
  color: var(--accent-light);
}

.stat-icon.green {
  background: var(--success-bg);
  color: var(--success);
}

.stat-icon.amber {
  background: var(--warning-bg);
  color: var(--warning);
}

.stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ---------- Project Grid ---------- */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
}

.project-card {
  background: var(--surface-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--surface-card-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: all var(--transition-base);
}

.project-card:hover {
  background: var(--surface-card-hover);
  border-color: rgba(59, 130, 246, 0.2);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
}

.project-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.project-client {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.2rem;
}

.project-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.project-meta-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.project-share {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.85rem;
  background: rgba(59, 130, 246, 0.06);
  border: 1px solid rgba(59, 130, 246, 0.12);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.project-share-url {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: 'SFMono-Regular', 'Consolas', monospace;
  font-size: 0.78rem;
  color: var(--accent-light);
}

.project-actions {
  display: flex;
  gap: 0.5rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--glass-border);
}

/* Status badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.65rem;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-ready {
  background: var(--success-bg);
  color: var(--success);
}

.badge-processing {
  background: var(--warning-bg);
  color: var(--warning);
}

.badge-pin {
  background: rgba(59, 130, 246, 0.1);
  color: var(--accent-light);
}

/* ---------- Upload Zone ---------- */
.upload-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem 2rem;
  border: 2px dashed rgba(59, 130, 246, 0.25);
  border-radius: var(--radius-lg);
  background: rgba(59, 130, 246, 0.03);
  cursor: pointer;
  transition: all var(--transition-base);
  text-align: center;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--accent);
  background: rgba(59, 130, 246, 0.08);
  box-shadow: var(--shadow-glow);
}

.upload-zone.dragover {
  transform: scale(1.01);
}

.upload-zone-icon {
  font-size: 3rem;
  opacity: 0.6;
}

.upload-zone-text {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.upload-zone-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ---------- Progress Bar ---------- */
.progress-container {
  width: 100%;
  margin-top: 0.5rem;
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: var(--navy-700);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  border-radius: 100px;
  width: 0%;
  transition: width 150ms ease;
  box-shadow: 0 0 12px var(--accent-glow);
}

.progress-label {
  display: flex;
  justify-content: space-between;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---------- Share Link Success ---------- */
.share-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  padding: 2rem;
  text-align: center;
  animation: fadeInUp 0.5s var(--ease-out);
}

.share-success-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--success-bg);
  font-size: 2rem;
  animation: scaleIn 0.4s var(--ease-out);
}

.share-link-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  max-width: 500px;
  padding: 0.75rem 1rem;
  background: var(--surface-input);
  border: 1px solid var(--surface-input-border);
  border-radius: var(--radius-sm);
}

.share-link-box input {
  flex: 1;
  background: none;
  border: none;
  color: var(--accent-light);
  font-family: 'SFMono-Regular', 'Consolas', monospace;
  font-size: 0.85rem;
  outline: none;
}

/* ---------- Login Page ---------- */
.login-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem;
}

.login-card {
  width: 100%;
  max-width: 420px;
  padding: 2.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.6s var(--ease-out);
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.login-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.login-error {
  padding: 0.7rem 1rem;
  margin-bottom: 1rem;
  background: var(--danger-bg);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: var(--radius-sm);
  color: var(--danger);
  font-size: 0.85rem;
  display: none;
  animation: shake 0.4s var(--ease-out);
}

.login-error.visible {
  display: block;
}

/* ---------- Viewer Page ---------- */
.viewer-container {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  background: var(--navy-900);
}

.viewer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  height: 56px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 10;
}

.viewer-info {
  display: flex;
  flex-direction: column;
}

.viewer-project-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
}

.viewer-project-desc {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.viewer-body {
  flex: 1;
  position: relative;
}

.viewer-body model-viewer {
  width: 100%;
  height: 100%;
  --poster-color: var(--navy-900);
}

.viewer-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  background: var(--glass-bg);
  border-top: 1px solid var(--glass-border);
  font-size: 0.72rem;
  color: var(--text-muted);
  gap: 0.4rem;
}

.viewer-footer .brand-icon-sm {
  width: 18px;
  height: 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.55rem;
  color: white;
}

/* PIN modal */
.pin-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6, 14, 26, 0.92);
  backdrop-filter: blur(8px);
  z-index: 200;
  animation: fadeIn 0.3s ease;
}

.pin-card {
  width: 100%;
  max-width: 380px;
  padding: 2rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  text-align: center;
  animation: fadeInUp 0.4s var(--ease-out);
}

.pin-card h2 {
  margin-bottom: 0.5rem;
}

.pin-card p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.pin-input-group {
  display: flex;
  gap: 0.5rem;
}

.pin-input-group .form-input {
  flex: 1;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}

.pin-error {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--danger);
  display: none;
}

.pin-error.visible {
  display: block;
}

/* Loading state for viewer */
.viewer-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  background: var(--navy-900);
  z-index: 5;
}

.viewer-loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--navy-600);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Error state for viewer */
.viewer-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: var(--navy-900);
  z-index: 5;
  text-align: center;
  padding: 2rem;
}

.viewer-error-icon {
  font-size: 3rem;
  opacity: 0.5;
}

/* ---------- Empty State ---------- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  text-align: center;
  gap: 1rem;
}

.empty-state-icon {
  font-size: 3.5rem;
  opacity: 0.4;
}

.empty-state h3 {
  color: var(--text-secondary);
}

.empty-state p {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 400px;
}

/* ---------- Toast / Notifications ---------- */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  color: var(--text-primary);
  animation: slideInRight 0.4s var(--ease-out);
  max-width: 380px;
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.error {
  border-left: 3px solid var(--danger);
}

.toast.fadeout {
  animation: fadeOutRight 0.3s var(--ease-out) forwards;
}

/* ---------- Confirm Dialog ---------- */
.confirm-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6, 14, 26, 0.85);
  backdrop-filter: blur(6px);
  z-index: 500;
  animation: fadeIn 0.2s ease;
}

.confirm-card {
  width: 100%;
  max-width: 400px;
  padding: 2rem;
  background: var(--surface-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--surface-card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.3s var(--ease-out);
}

.confirm-card h3 {
  margin-bottom: 0.5rem;
}

.confirm-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.confirm-actions {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
}

/* ---------- Settings ---------- */
.settings-section {
  max-width: 500px;
}

/* ---------- Utilities ---------- */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.gap-1 { gap: 0.5rem; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.hidden { display: none !important; }

/* ---------- Animations ---------- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.5);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeOutRight {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100px);
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .page-content {
    padding: 1.25rem 1rem;
  }

  .navbar {
    padding: 0 1rem;
  }

  .navbar-brand span:not(.brand-icon) {
    font-size: 0.95rem;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: 1fr 1fr;
  }

  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }

  .login-card {
    padding: 1.75rem;
  }

  .upload-zone {
    padding: 2rem 1.25rem;
  }

  .viewer-header {
    padding: 0 0.85rem;
  }

  .viewer-project-name {
    font-size: 0.85rem;
  }
}

@media (max-width: 480px) {
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .navbar-nav {
    gap: 0.25rem;
  }

  .nav-link span {
    display: none;
  }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--navy-800);
}

::-webkit-scrollbar-thumb {
  background: var(--navy-500);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--navy-400);
}