:root {
  --color-primary: #7C3AED;
  --color-primary-700: #6D28D9;
  --color-secondary: #6366F1;
  --color-accent: #0891B2;
  --color-bg: #0F172A;
  --color-bg-2: #1E1B4B;
  --color-fg: #F8FAFC;
  --color-fg-muted: #CBD5E1;
  --color-fg-dim: #94A3B8;
  --color-surface: rgba(255, 255, 255, 0.06);
  --color-surface-strong: rgba(255, 255, 255, 0.10);
  --color-border: rgba(255, 255, 255, 0.10);
  --color-border-strong: rgba(255, 255, 255, 0.18);
  --color-danger: #EF4444;
  --color-success: #10B981;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --grad-bg: radial-gradient(1200px 600px at 80% -10%, rgba(124, 58, 237, 0.25), transparent 60%),
             radial-gradient(900px 500px at -10% 110%, rgba(8, 145, 178, 0.20), transparent 60%),
             linear-gradient(180deg, #0B1224 0%, #0F172A 60%, #0B1224 100%);
}

html, body {
  background: var(--color-bg);
  color: var(--color-fg);
  font-family: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.app-bg {
  background: var(--grad-bg);
  min-height: 100dvh;
}

::selection { background: rgba(124, 58, 237, 0.4); color: #fff; }

h1, h2, h3, h4, h5, h6 { color: var(--color-fg); letter-spacing: -0.01em; font-weight: 600; }
h1 { font-weight: 700; letter-spacing: -0.02em; }
.text-muted, .text-secondary { color: var(--color-fg-dim) !important; }

a { color: var(--color-secondary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }

hr { border-color: var(--color-border); opacity: 1; }

/* === Navbar override === */
.navbar.navbar-dark.bg-dark {
  background: rgba(15, 23, 42, 0.7) !important;
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--color-border);
}
.navbar-brand {
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, #C4B5FD 0%, #67E8F9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.navbar-nav .nav-link {
  color: var(--color-fg-muted) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.navbar-nav .nav-link:hover {
  color: var(--color-fg) !important;
  background: var(--color-surface);
}

/* === Glass card === */
.glass {
  background: var(--color-surface);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.glass-strong {
  background: var(--color-surface-strong);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* === Bootstrap card override === */
.card {
  background: var(--color-surface);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-fg);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-lg);
}
.card-body { color: var(--color-fg); }
.card .text-muted { color: var(--color-fg-dim) !important; }

/* === Forms === */
.form-label {
  color: var(--color-fg-muted);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  letter-spacing: 0.01em;
}
.form-control, .form-select {
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-fg);
  padding: 0.65rem 0.9rem;
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}
.form-control::placeholder { color: var(--color-fg-dim); }
.form-control:focus, .form-select:focus {
  background-color: rgba(15, 23, 42, 0.8);
  border-color: var(--color-primary);
  color: var(--color-fg);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.18);
  outline: none;
}
.form-select {
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23CBD5E1' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 14px 14px;
  padding-right: 2.4rem;
  appearance: none;
  -webkit-appearance: none;
}
.form-select option {
  background: #1E1B4B;
  color: var(--color-fg);
}
.form-check-input {
  background-color: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--color-border-strong);
}
.form-check-input:checked {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}
.form-check-label { color: var(--color-fg-muted); }

input[type=file].form-control {
  padding: 0.4rem 0.6rem;
  cursor: pointer;
}
input[type=file]::file-selector-button {
  background: var(--color-surface-strong);
  color: var(--color-fg);
  border: 0;
  padding: 0.4rem 0.85rem;
  margin-right: 0.85rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  cursor: pointer;
  transition: background var(--transition);
}
input[type=file]::file-selector-button:hover { background: rgba(255, 255, 255, 0.18); }

/* === Buttons === */
.btn {
  border-radius: var(--radius-md);
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0.6rem 1.1rem;
  border: 1px solid transparent;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), color var(--transition);
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(0, 77, 89, 0.45);
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: linear-gradient(135deg, #006675 0%, #004D59 100%);
  color: #F2DEFA;
  box-shadow: 0 6px 20px rgba(0, 77, 89, 0.45);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #008294 0%, #006675 100%);
  color: #F2DEFA;
  box-shadow: 0 10px 28px rgba(0, 77, 89, 0.6);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface-strong);
  border-color: var(--color-border-strong);
  color: var(--color-fg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.28);
  color: var(--color-fg);
}

.btn-info {
  background: linear-gradient(135deg, var(--color-accent) 0%, #06B6D4 100%);
  color: #fff;
  border: 0;
  box-shadow: 0 6px 18px rgba(8, 145, 178, 0.35);
}
.btn-info:hover {
  background: linear-gradient(135deg, #0BA5C1 0%, #22D3EE 100%);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 10px 26px rgba(8, 145, 178, 0.5);
}

.btn-success {
  background: linear-gradient(135deg, #10B981 0%, #059669 100%);
  color: #fff;
  border: 0;
}
.btn-success:hover {
  background: linear-gradient(135deg, #34D399 0%, #10B981 100%);
  color: #fff;
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, var(--color-danger) 0%, #B91C1C 100%);
  color: #fff;
  border: 0;
}
.btn-danger:hover {
  background: linear-gradient(135deg, #F87171 0%, #DC2626 100%);
  color: #fff;
  transform: translateY(-1px);
}

.btn-light {
  background: rgba(255, 255, 255, 0.92);
  color: #0F172A;
  border: 0;
}

/* === Alerts (flash) === */
.alert {
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface-strong);
  color: var(--color-fg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.alert-info, .alert-warning {
  background: var(--color-surface-strong);
  color: var(--color-fg);
}

/* === Code in body text === */
code {
  background: rgba(124, 58, 237, 0.15);
  color: #C4B5FD;
  padding: 0.1rem 0.4rem;
  border-radius: 6px;
  font-size: 0.9em;
}

/* === Misc === */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}