/* 
 * Enterprise OSGB Platform
 * Premium Theme Engine - True Day/Night Mode
 * Uses Bootstrap 5.3 data-bs-theme + Custom CSS Variables
 */

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

/* ============================================
   LIGHT THEME (Default)
   ============================================ */
:root, [data-bs-theme="light"] {
    --bg-main: #f0f4f8;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --text-heading: #0f172a;
    --border-color: #e2e8f0;
    
    --brand-primary: #2563eb;
    --brand-primary-hover: #1d4ed8;
    --brand-secondary: #0ea5e9;
    --brand-gradient: linear-gradient(135deg, #2563eb, #0ea5e9);
    
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --navbar-border: rgba(0, 0, 0, 0.06);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
    
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-focus-ring: rgba(37, 99, 235, 0.2);
    
    --badge-bg: rgba(37, 99, 235, 0.1);
    --badge-text: #2563eb;
    
    --transition-speed: 0.35s;
    
    /* Login Page */
    --login-bg-image: url('/assets/img/bg-abstract-light.png');
    --login-glass-bg: rgba(255, 255, 255, 0.75);
    --login-glass-border: rgba(255, 255, 255, 0.6);
    --login-glass-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
    --login-text: #1e293b;
    --login-text-muted: #64748b;
    --login-input-bg: rgba(241, 245, 249, 0.8);
    --login-input-border: rgba(203, 213, 225, 0.6);
    --login-input-text: #1e293b;
    --login-input-placeholder: #94a3b8;
    --login-icon-color: #2563eb;
    --login-checkbox-bg: #ffffff;
    --login-checkbox-border: #cbd5e1;
}

/* ============================================
   DARK THEME
   ============================================ */
[data-bs-theme="dark"] {
    --bg-main: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #263548;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-heading: #f8fafc;
    --border-color: #334155;
    
    --brand-primary: #3b82f6;
    --brand-primary-hover: #60a5fa;
    --brand-secondary: #38bdf8;
    --brand-gradient: linear-gradient(135deg, #3b82f6, #38bdf8);
    
    --navbar-bg: rgba(15, 23, 42, 0.9);
    --navbar-border: rgba(255, 255, 255, 0.06);
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.4);
    
    --input-bg: #1e293b;
    --input-border: #475569;
    --input-focus-ring: rgba(59, 130, 246, 0.25);
    
    --badge-bg: rgba(59, 130, 246, 0.15);
    --badge-text: #60a5fa;
    
    /* Login Page */
    --login-bg-image: url('/assets/img/bg-abstract.png');
    --login-glass-bg: rgba(15, 23, 42, 0.65);
    --login-glass-border: rgba(255, 255, 255, 0.1);
    --login-glass-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
    --login-text: #f1f5f9;
    --login-text-muted: #94a3b8;
    --login-input-bg: rgba(255, 255, 255, 0.05);
    --login-input-border: rgba(255, 255, 255, 0.15);
    --login-input-text: #ffffff;
    --login-input-placeholder: rgba(255, 255, 255, 0.4);
    --login-icon-color: #38bdf8;
    --login-checkbox-bg: rgba(255, 255, 255, 0.1);
    --login-checkbox-border: rgba(255, 255, 255, 0.3);
}

/* ============================================
   BASE STYLES
   ============================================ */
body {
    background-color: var(--bg-main) !important;
    color: var(--text-main) !important;
    font-family: 'Outfit', system-ui, -apple-system, sans-serif;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
}

a {
    transition: color 0.2s ease;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.bg-custom-main {
    background-color: var(--bg-main) !important;
    transition: background-color var(--transition-speed) ease;
}

.bg-custom-card {
    background-color: var(--bg-card) !important;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color) !important;
    border-radius: 16px;
    transition: background-color var(--transition-speed) ease, box-shadow 0.2s ease, border-color var(--transition-speed) ease;
}

.bg-custom-card:hover {
    box-shadow: var(--shadow-lg);
}

.text-custom-main {
    color: var(--text-main) !important;
    transition: color var(--transition-speed) ease;
}

.text-custom-muted {
    color: var(--text-muted) !important;
}

.text-custom-heading {
    color: var(--text-heading) !important;
}

.border-custom {
    border-color: var(--border-color) !important;
    transition: border-color var(--transition-speed) ease;
}

/* ============================================
   FORM CONTROLS
   ============================================ */
.form-control-custom {
    background-color: var(--input-bg) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--input-border) !important;
    border-radius: 10px;
    padding: 0.65rem 1rem;
    transition: all 0.25s ease;
}

.form-control-custom:focus {
    border-color: var(--brand-primary) !important;
    box-shadow: 0 0 0 3px var(--input-focus-ring) !important;
    outline: none;
}

.form-control-custom::placeholder {
    color: var(--text-muted) !important;
}

.input-group-text-custom {
    background-color: var(--bg-card) !important;
    color: var(--text-muted) !important;
    border: 1px solid var(--input-border) !important;
    transition: all var(--transition-speed) ease;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-brand {
    background: var(--brand-gradient);
    color: #ffffff;
    border: none;
    border-radius: 10px;
    padding: 0.65rem 1.75rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.btn-brand:hover {
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
}

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

/* ============================================
   NAVBAR
   ============================================ */
.navbar-custom {
    background-color: var(--navbar-bg) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--navbar-border) !important;
    transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
}

.navbar-custom .nav-link {
    color: var(--text-muted) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 8px;
    margin: 0 2px;
    transition: all 0.2s ease;
}

.navbar-custom .nav-link:hover {
    color: var(--brand-primary) !important;
    background-color: var(--badge-bg);
}

.navbar-custom .nav-link.active {
    color: var(--brand-primary) !important;
    background-color: var(--badge-bg);
}

.navbar-custom .navbar-brand {
    color: var(--brand-primary) !important;
}

/* Theme Toggle Button */
#theme-toggle {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border-color) !important;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-toggle:hover {
    background-color: var(--brand-primary) !important;
    color: #ffffff !important;
    border-color: var(--brand-primary) !important;
    transform: rotate(15deg);
}

/* Dropdown */
.dropdown-menu {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: var(--shadow-lg) !important;
    border-radius: 12px !important;
    overflow: hidden;
}

.dropdown-item {
    color: var(--text-main) !important;
    transition: all 0.15s ease;
}

.dropdown-item:hover {
    background-color: var(--badge-bg) !important;
    color: var(--brand-primary) !important;
}

.dropdown-item.text-danger {
    color: #ef4444 !important;
}

.dropdown-item.text-danger:hover {
    background-color: rgba(239, 68, 68, 0.1) !important;
    color: #ef4444 !important;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background-color: var(--bg-card) !important;
    border: 1px solid var(--border-color) !important;
    border-radius: 16px !important;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-speed) ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    background-color: transparent !important;
    border-bottom: 1px solid var(--border-color) !important;
    color: var(--text-heading) !important;
}

.card-body {
    color: var(--text-main) !important;
}

/* ============================================
   TABLES
   ============================================ */
.glass-card {
    background: var(--login-glass-bg) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--login-glass-border) !important;
    position: relative;
    z-index: 1;
}
.glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.05), rgba(255,255,255,0));
    pointer-events: none;
    z-index: -1;
}
.table-custom {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text-main);
    color: var(--text-main);
}

.table-custom th {
    border-bottom: 2px solid var(--border-color);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.75px;
    padding: 0.85rem 1rem;
}

.table-custom td {
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    padding: 0.85rem 1rem;
    color: var(--text-main);
    transition: background-color 0.15s ease;
}

.table-custom tbody tr:hover td {
    background-color: var(--bg-card-hover);
}

/* ============================================
   TAB NAVIGATION (Settings Page)
   ============================================ */
.nav-tabs {
    border-bottom: 2px solid var(--border-color) !important;
}

.nav-tabs .nav-link {
    color: var(--text-muted) !important;
    border: none !important;
    border-bottom: 3px solid transparent !important;
    padding: 0.75rem 1.25rem;
    font-weight: 600;
    transition: all 0.2s ease;
    background: transparent !important;
}

.nav-tabs .nav-link:hover {
    color: var(--brand-primary) !important;
    border-bottom-color: var(--badge-bg) !important;
}

.nav-tabs .nav-link.active {
    color: var(--brand-primary) !important;
    border-bottom-color: var(--brand-primary) !important;
    background: transparent !important;
}

/* ============================================
   ALERT OVERRIDES
   ============================================ */
.alert {
    border-radius: 12px;
}

/* ============================================
   BADGE / STATS
   ============================================ */
.stat-badge {
    background-color: var(--badge-bg);
    color: var(--badge-text);
    border-radius: 12px;
    padding: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================
   LOGIN PAGE - True Day/Night
   ============================================ */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: var(--login-bg-image);
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    transition: background-image 0.5s ease;
    position: relative;
    padding: 2rem;
}

/* Overlay for extra contrast */
.login-page::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.1);
    z-index: 0;
}

[data-bs-theme="dark"] .login-page::before {
    background: rgba(0, 0, 0, 0.25);
}

.login-glass {
    background: var(--login-glass-bg);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--login-glass-border);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    max-width: 460px;
    box-shadow: var(--login-glass-shadow);
    color: var(--login-text);
    position: relative;
    z-index: 1;
    transition: all var(--transition-speed) ease;
}

/* Subtle glow */
.login-glass::after {
    content: '';
    position: absolute;
    top: -1px; left: -1px; right: -1px; bottom: -1px;
    border-radius: 24px;
    background: var(--brand-gradient);
    opacity: 0.08;
    z-index: -1;
}

.login-glass .form-label {
    color: var(--login-text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.75px;
    text-transform: uppercase;
}

.login-glass .login-input {
    background: var(--login-input-bg) !important;
    border: 1px solid var(--login-input-border) !important;
    color: var(--login-input-text) !important;
    border-radius: 12px !important;
    padding: 0.75rem 1.15rem !important;
    transition: all 0.3s ease;
}

.login-glass .login-input:focus {
    border-color: var(--brand-primary) !important;
    box-shadow: 0 0 0 4px var(--input-focus-ring) !important;
}

.login-glass .login-input::placeholder {
    color: var(--login-input-placeholder) !important;
}

.login-glass .input-icon {
    background: var(--login-input-bg) !important;
    border: 1px solid var(--login-input-border) !important;
    color: var(--login-icon-color) !important;
    border-right: none !important;
    border-radius: 12px 0 0 12px !important;
    transition: all 0.3s ease;
}

.login-glass .login-input-right {
    border-left: none !important;
    border-radius: 0 12px 12px 0 !important;
}

.login-glass .form-check-input {
    background-color: var(--login-checkbox-bg) !important;
    border-color: var(--login-checkbox-border) !important;
}

.btn-login {
    background: var(--brand-gradient);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    padding: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 0.9rem;
    transition: all 0.25s ease;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(37, 99, 235, 0.4);
    color: #ffffff;
}

/* Login theme toggle */
.login-theme-toggle {
    background: var(--login-glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--login-glass-border);
    color: var(--login-text);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.login-theme-toggle:hover {
    background: var(--brand-primary);
    color: #ffffff;
    border-color: var(--brand-primary);
    transform: rotate(20deg) scale(1.05);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .login-glass {
        padding: 2rem 1.5rem;
        border-radius: 20px;
    }
}

/* ============================================
   SMOOTH GLOBAL TRANSITIONS
   ============================================ */
*, *::before, *::after {
    transition: background-color var(--transition-speed) ease,
                color var(--transition-speed) ease,
                border-color var(--transition-speed) ease,
                box-shadow var(--transition-speed) ease;
}

/* Exclude inputs from global transition to avoid lag */
input, select, textarea, button {
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}