/* ============================================
   Bachelor Flat Manager — Custom Styles
   Built on top of Tailwind CSS CDN
   ============================================ */

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

/* ---------- CSS Variables / Design Tokens ---------- */
:root {
  --primary-50:  #eef2ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-300: #a5b4fc;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  --primary-800: #3730a3;
  --primary-900: #312e81;

  --accent-400: #a78bfa;
  --accent-500: #8b5cf6;
  --accent-600: #7c3aed;

  --success-400: #34d399;
  --success-500: #10b981;
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;
  --danger-400:  #f87171;
  --danger-500:  #ef4444;

  --sidebar-bg:    #1e1b4b;
  --sidebar-hover: #312e81;
  --sidebar-text:  #c7d2fe;
  --sidebar-width: 260px;

  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.15);

  --body-bg: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--body-bg);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Login Background ---------- */
.login-bg {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 30%, #4338ca 60%, #6366f1 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.login-bg::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.3), transparent 70%);
  top: -100px;
  right: -100px;
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}

.login-bg::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.25), transparent 70%);
  bottom: -80px;
  left: -80px;
  border-radius: 50%;
  animation: float 10s ease-in-out infinite reverse;
}

/* ---------- Glassmorphism Card ---------- */
.glass-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 20px;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

/* ---------- Dashboard Cards ---------- */
.dash-card {
  background: var(--card-bg);
  border-radius: 16px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dash-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* ---------- Stat Cards ---------- */
.stat-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 1.5rem;
  border: 1px solid #e2e8f0;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  border-radius: 16px 16px 0 0;
}

.stat-card.indigo::before  { background: linear-gradient(90deg, #6366f1, #818cf8); }
.stat-card.violet::before  { background: linear-gradient(90deg, #8b5cf6, #a78bfa); }
.stat-card.emerald::before { background: linear-gradient(90deg, #10b981, #34d399); }
.stat-card.amber::before   { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.stat-card.rose::before    { background: linear-gradient(90deg, #f43f5e, #fb7185); }

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-width);
  background: linear-gradient(180deg, #1e1b4b 0%, #312e81 100%);
  min-height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 40;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 999px; }

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--sidebar-text);
  text-decoration: none;
  border-radius: 10px;
  margin: 2px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  cursor: pointer;
  position: relative;
}

.sidebar-link:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.sidebar-link.active {
  background: rgba(99, 102, 241, 0.35);
  color: #fff;
  font-weight: 600;
}

.sidebar-link.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 60%;
  background: #818cf8;
  border-radius: 0 4px 4px 0;
}

/* ---------- Main Content Area ---------- */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- Mobile Sidebar ---------- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 35;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.show {
  display: block;
  opacity: 1;
}

@media (max-width: 1024px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 0;
  }
}

/* ---------- Top Bar ---------- */
.top-bar {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid #e2e8f0;
  position: sticky;
  top: 0;
  z-index: 30;
}

/* ---------- Buttons ---------- */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  color: white;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

.btn-primary:active { transform: translateY(0); }

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

.btn-success {
  background: linear-gradient(135deg, #059669, #10b981);
  color: white;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
  background: linear-gradient(135deg, #047857, #059669);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #dc2626, #ef4444);
  color: white;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  background: linear-gradient(135deg, #b91c1c, #dc2626);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary-600);
  font-weight: 600;
  padding: 10px 24px;
  border-radius: 10px;
  border: 2px solid var(--primary-200);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.btn-outline:hover {
  background: var(--primary-50);
  border-color: var(--primary-400);
}

/* ---------- Form Inputs ---------- */
.form-input {
  width: 100%;
  padding: 10px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  background: #fff;
  transition: all 0.2s ease;
  outline: none;
}

.form-input:focus {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

.form-input::placeholder {
  color: #94a3b8;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-select {
  width: 100%;
  padding: 10px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-size: 0.9rem;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  background: #fff;
  transition: all 0.2s ease;
  outline: none;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3E%3Cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3E%3C/svg%3E");
  background-position: right 10px center;
  background-repeat: no-repeat;
  background-size: 20px;
}

.form-select:focus {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

/* ---------- Tables ---------- */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.data-table thead th {
  background: #f8fafc;
  padding: 12px 16px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  text-align: left;
  border-bottom: 2px solid #e2e8f0;
  white-space: nowrap;
}

.data-table tbody td {
  padding: 12px 16px;
  font-size: 0.88rem;
  color: var(--text-primary);
  border-bottom: 1px solid #f1f5f9;
  vertical-align: middle;
}

.data-table tbody tr {
  transition: background 0.15s ease;
}

.data-table tbody tr:hover {
  background: #f8fafc;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* ---------- Status Badges ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-pending {
  background: #fef3c7;
  color: #92400e;
}

.badge-approved {
  background: #d1fae5;
  color: #065f46;
}

.badge-closed {
  background: #e0e7ff;
  color: #3730a3;
}

.badge-active {
  background: #d1fae5;
  color: #065f46;
}

/* ---------- Toast Notifications ---------- */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 0.88rem;
  font-weight: 500;
  color: white;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 380px;
  backdrop-filter: blur(10px);
}

.toast.success { background: linear-gradient(135deg, #059669, #10b981); }
.toast.error   { background: linear-gradient(135deg, #dc2626, #ef4444); }
.toast.warning { background: linear-gradient(135deg, #d97706, #f59e0b); }
.toast.info    { background: linear-gradient(135deg, #4f46e5, #6366f1); }

.toast.hide {
  animation: toastOut 0.3s cubic-bezier(0.4, 0, 1, 1) forwards;
}

/* ---------- Loading Spinner ---------- */
.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top: 3px solid #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

.spinner-dark {
  border: 3px solid rgba(99, 102, 241, 0.15);
  border-top: 3px solid var(--primary-600);
}

.page-loader {
  position: fixed;
  inset: 0;
  background: rgba(248, 250, 252, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9998;
}

.page-loader .spinner {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

/* ---------- Section Tabs ---------- */
.section-panel {
  display: none;
  animation: fadeSlideIn 0.35s ease;
}

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

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.modal-box {
  background: #fff;
  border-radius: 20px;
  padding: 32px;
  max-width: 480px;
  width: 90%;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
  transform: scale(0.95) translateY(10px);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.show .modal-box {
  transform: scale(1) translateY(0);
}

/* ---------- Animations ---------- */
@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-20px) rotate(3deg); }
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px) scale(0.95); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to   { opacity: 0; transform: translateX(40px) scale(0.95); }
}

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

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes pulse-ring {
  0%   { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ---------- Print Styles ---------- */
@media print {
  .sidebar, .top-bar, .no-print { display: none !important; }
  .main-content { margin-left: 0 !important; }
  .dash-card { box-shadow: none; border: 1px solid #ddd; }
  body { background: #fff; }
}

/* ---------- Utility ---------- */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-400), var(--accent-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}