/**
 * EngiSuite Universal Theme System
 * Centralized color palette for consistent theming across all pages
 * 
 * Color Palette:
 * - Dark Mode: Light text (yellow, white, blue) + Dark blue background
 * - Light Mode: Dark text (green, blue, black) + Light background (white, cyan)
 */

/* ============================================
   CSS Custom Properties (Color Variables)
   ============================================ */

:root {
    /* PREMIUM LIGHT MODE */
    --color-bg-primary: #f8fafc; /* slate-50 - softer background */
    --color-bg-secondary: #f1f5f9; /* slate-100 */
    --color-bg-tertiary: #e2e8f0; /* slate-200 */
    --color-bg-card: #ffffff;
    --color-bg-input: #ffffff;
    --color-bg-hover: #f1f5f9;
    
    --color-text-primary: #0f172a; /* slate-900 - crisp high contrast */
    --color-text-secondary: #334155; /* slate-700 */
    --color-text-tertiary: #475569; /* slate-600 */
    --color-text-muted: #64748b; /* slate-500 */
    --color-text-accent: #4338ca; /* indigo-700 */
    
    --color-heading: #020617; /* slate-950 - strict black */
    --color-link: #4f46e5; /* indigo-600 */
    --color-link-hover: #3730a3; /* indigo-800 */
    
    /* Premium Brand Colors */
    --color-brand-primary: #4f46e5; /* indigo-600 - modern elegant primary */
    --color-brand-secondary: #10b981; /* emerald-500 - vibrant accent */
    --color-brand-accent: #0ea5e9; /* sky-500 - supporting accent */
    
    /* Dynamic Status Colors */
    --color-success: #10b981; /* emerald-500 */
    --color-success-bg: #d1fae5; /* emerald-100 */
    --color-warning: #f59e0b; /* amber-500 */
    --color-warning-bg: #fef3c7; /* amber-100 */
    --color-danger: #ef4444; /* red-500 */
    --color-danger-bg: #fee2e2; /* red-100 */
    --color-info: #0ea5e9; /* sky-500 */
    --color-info-bg: #e0f2fe; /* sky-100 */
    
    /* Clean Borders */
    --color-border: #e2e8f0; /* slate-200 */
    --color-border-hover: #cbd5e1; /* slate-300 */
    --color-border-focus: #4f46e5; /* indigo-600 */
    
    /* Modern Softer Shadows (disbursed, not harsh) */
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    
    /* Header/Navigation with Glassmorphism */
    --color-header-bg: rgba(255, 255, 255, 0.85);
    --color-header-border: rgba(226, 232, 240, 0.8);
    --color-header-text: #0f172a;
    
    /* Button Colors */
    --color-btn-primary-bg: #1d4ed8;
    --color-btn-primary-text: #ffffff;
    --color-btn-primary-hover: #1e40af;
    --color-btn-secondary-bg: #f0f9ff;
    --color-btn-secondary-text: #1d4ed8;
    --color-btn-secondary-hover: #e0f2fe;
    --btn-shadow: 0 6px 14px rgba(15, 23, 42, 0.14);
    --btn-shadow-hover: 0 12px 24px rgba(15, 23, 42, 0.2);
    --btn-shadow-active: 0 4px 10px rgba(15, 23, 42, 0.16);
    --btn-highlight: rgba(255, 255, 255, 0.22);
}

/* ============================================
   Dark Mode Colors
   ============================================ */

.dark,
[data-theme="dark"],
.dark-mode {
    /* PREMIUM DARK MODE */
    /* Deep true dark backgrounds instead of washed navy */
    --color-bg-primary: #0b0f19; /* premium deep slate almost black */
    --color-bg-secondary: #111827; /* gray-900 */
    --color-bg-tertiary: #1f2937; /* gray-800 */
    --color-bg-card: #151e2f; 
    --color-bg-input: #1e293b;
    --color-bg-hover: #1e293b;
    
    /* High contrast text */
    --color-text-primary: #f8fafc; /* crisp white */
    --color-text-secondary: #cbd5e1; /* slate-300 */
    --color-text-tertiary: #94a3b8; /* slate-400 */
    --color-text-muted: #64748b; /* slate-500 */
    --color-text-accent: #818cf8; /* indigo-400 */
    
    --color-heading: #ffffff; /* pure white */
    --color-link: #818cf8; /* indigo-400 */
    --color-link-hover: #a5b4fc; /* indigo-300 */
    
    /* Vibrant modern accents */
    --color-brand-primary: #6366f1; /* indigo-500 */
    --color-brand-secondary: #10b981; /* emerald-500 */
    --color-brand-accent: #2dd4bf; /* teal-400 */
    
    /* Brightened status colors for dark mode visibility */
    --color-success: #34d399; /* emerald-400 */
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-warning: #fbbf24; /* amber-400 */
    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-danger: #f87171; /* red-400 */
    --color-danger-bg: rgba(239, 68, 68, 0.15);
    --color-info: #38bdf8; /* sky-400 */
    --color-info-bg: rgba(14, 165, 233, 0.15);
    
    /* Subtle Borders */
    --color-border: #334155; /* slate-700 */
    --color-border-hover: #475569; /* slate-600 */
    --color-border-focus: #6366f1; /* indigo-500 */
    
    /* Deeper Shadows for Dark Mode */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.6), 0 2px 4px -2px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.7), 0 4px 6px -4px rgba(0, 0, 0, 0.6);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.8), 0 8px 10px -6px rgba(0, 0, 0, 0.7);
    
    /* Dark Header with Glassmorphism */
    --color-header-bg: rgba(11, 15, 25, 0.85);
    --color-header-border: rgba(51, 65, 85, 0.8);
    --color-header-text: #ffffff;
    
    /* Vibrant Button Colors */
    --color-btn-primary-bg: #4f46e5;
    --color-btn-primary-text: #ffffff;
    --color-btn-primary-hover: #6366f1;
    --color-btn-secondary-bg: #1e293b;
    --color-btn-secondary-text: #f8fafc;
    --color-btn-secondary-hover: #334155;
    --btn-shadow: 0 8px 18px rgba(2, 6, 23, 0.55);
    --btn-shadow-hover: 0 14px 28px rgba(2, 6, 23, 0.72);
    --btn-shadow-active: 0 6px 12px rgba(2, 6, 23, 0.65);
    --btn-highlight: rgba(148, 163, 184, 0.14);
}

/* ============================================
   Base Styles
   ============================================ */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: 'Inter', 'Space Grotesk', system-ui, -apple-system, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    color: var(--color-heading);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    color: var(--color-text-primary);
    margin-bottom: 1rem;
}

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ============================================
   Layout Components
   ============================================ */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

.card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border-hover);
}

/* ============================================
   Header/Navigation
   ============================================ */

.header,
header,
nav.main-nav {
    background-color: var(--color-header-bg);
    border-bottom: 1px solid var(--color-header-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.header a,
header a,
nav a {
    color: var(--color-text-primary);
}

.header a:hover,
header a:hover,
nav a:hover {
    color: var(--color-brand-primary);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

/* Global modern 3D button treatment (opt-out via .no-3d-btn) */
button:not(.no-3d-btn),
input[type="button"]:not(.no-3d-btn),
input[type="submit"]:not(.no-3d-btn),
input[type="reset"]:not(.no-3d-btn),
.btn:not(.no-3d-btn) {
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    box-shadow: var(--btn-shadow);
    transition: transform 0.2s ease, box-shadow 0.25s ease, filter 0.2s ease, background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

button:not(.no-3d-btn):hover,
input[type="button"]:not(.no-3d-btn):hover,
input[type="submit"]:not(.no-3d-btn):hover,
input[type="reset"]:not(.no-3d-btn):hover,
.btn:not(.no-3d-btn):hover {
    transform: translateY(-2px);
    box-shadow: var(--btn-shadow-hover);
    filter: saturate(1.05);
}

button:not(.no-3d-btn):active,
input[type="button"]:not(.no-3d-btn):active,
input[type="submit"]:not(.no-3d-btn):active,
input[type="reset"]:not(.no-3d-btn):active,
.btn:not(.no-3d-btn):active {
    transform: translateY(1px) scale(0.995);
    box-shadow: var(--btn-shadow-active);
}

button:not(.no-3d-btn):focus-visible,
input[type="button"]:not(.no-3d-btn):focus-visible,
input[type="submit"]:not(.no-3d-btn):focus-visible,
input[type="reset"]:not(.no-3d-btn):focus-visible,
.btn:not(.no-3d-btn):focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

button:not(.no-3d-btn)::before,
.btn:not(.no-3d-btn)::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, var(--btn-highlight), transparent 45%);
}

.btn-primary {
    background: linear-gradient(135deg, color-mix(in srgb, var(--color-btn-primary-bg) 88%, #ffffff 12%), var(--color-btn-primary-bg));
    color: var(--color-btn-primary-text);
}

.btn-primary:hover {
    background: linear-gradient(135deg, color-mix(in srgb, var(--color-btn-primary-hover) 85%, #ffffff 15%), var(--color-btn-primary-hover));
}

.btn-secondary {
    background: linear-gradient(135deg, color-mix(in srgb, var(--color-btn-secondary-bg) 85%, #ffffff 15%), var(--color-btn-secondary-bg));
    color: var(--color-btn-secondary-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, color-mix(in srgb, var(--color-btn-secondary-hover) 86%, #ffffff 14%), var(--color-btn-secondary-hover));
    border-color: var(--color-border-hover);
}

.btn-success {
    background-color: var(--color-success);
    color: white;
}

.btn-warning {
    background-color: var(--color-warning);
    color: white;
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

/* ============================================
   Form Elements
   ============================================ */

input,
textarea,
select {
    background-color: var(--color-bg-input);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    width: 100%;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-border-focus);
    box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.15);
}

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

label {
    display: block;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 0.375rem;
}

/* ============================================
   Status Messages
   ============================================ */

.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.alert-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.alert-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.alert-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid var(--color-info);
}

/* ============================================
   Tables
   ============================================ */

table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-bg-card);
    border-radius: 0.5rem;
    overflow: hidden;
}

th {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    font-weight: 600;
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 2px solid var(--color-border);
}

td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

tr:hover {
    background-color: var(--color-bg-hover);
}

/* ============================================
   Sidebar
   ============================================ */

.sidebar {
    background-color: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    padding: 1.5rem;
}

.sidebar-item {
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--color-text-primary);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-item:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-brand-primary);
}

.sidebar-item.active {
    background-color: var(--color-brand-primary);
    color: white;
}

/* ============================================
   Theme Toggle Button
   ============================================ */

.theme-toggle {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 0.5rem;
    background-color: var(--color-bg-input);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--color-bg-hover);
    border-color: var(--color-border-hover);
}

/* ============================================
   Utility Classes
   ============================================ */

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

.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-card { background-color: var(--color-bg-card); }

.border-default { border-color: var(--color-border); }
.border-focus { border-color: var(--color-border-focus); }

/* Gradient text for branding */
.gradient-text {
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   Scrollbar Styling
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: 4px;
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

.animate-fade-in {
    animation: fadeIn 0.3s ease;
}

.animate-slide-up {
    animation: slideUp 0.4s ease;
}

/* ============================================
   Responsive Adjustments
   ============================================ */

@media (max-width: 768px) {
    h1 { font-size: 1.875rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .container {
        padding: 0 0.75rem;
    }
    
    .card {
        padding: 1rem;
    }
}