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

:root {
    /* Libra Technical Excellence Color Palette */
    --bg-libra: #f7fafd;
    --bg-surface: #ffffff;
    --bg-surface-low: #f1f4f7;
    --bg-surface-high: #ebeef1;
    
    --primary: #000f22; /* Deep Tech Blue */
    --primary-container: #0a2540;
    --primary-light: #49607e;
    --primary-soft: rgba(10, 37, 64, 0.05);
    
    --secondary: #9f4200; /* Energetic Orange */
    --secondary-container: #fc7c31;
    --secondary-light: #ffb692;
    
    --tertiary: #001210; /* Deep Teal */
    --tertiary-container: #002a26;
    --tertiary-accent: #00d1c1;
    
    --success: #00d1c1;
    --danger: #ba1a1a;
    
    --text-main: #181c1e;
    --text-dim: #43474d;
    --text-on-primary: #ffffff;
    
    /* Depth & Shadows - Subtle & Premium */
    --border-light: #e0e3e6;
    --border-ghost: rgba(255, 255, 255, 0.1);
    --shadow-soft: 0 4px 20px rgba(10, 37, 64, 0.05);
    --shadow-md: 0 12px 32px rgba(10, 37, 64, 0.08);
    --shadow-premium: 0 20px 48px rgba(10, 37, 64, 0.12);
    
    /* Glassmorphism Tokens */
    --glass-bg: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-blur: 16px;
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    
    /* Spacing & Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --spacing-base: 8px;
    
    /* Shape Language - Rounded Elegance */
    --radius-xl: 1.5rem; /* 24px */
    --radius-lg: 1rem;   /* 16px */
    --radius-md: 0.75rem; /* 12px */
    --radius-sm: 0.25rem; /* 4px */
    --radius-pill: 9999px;
}

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

body {
    background-color: var(--bg-libra);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    line-height: 1.5;
    transition: background-color 0.4s ease;
}

/* Typography resets */
h1, h2, h3, h4, h5 {
    color: var(--primary);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: 1.5rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* Navigation - Enhanced Glassmorphism */
.navbar {
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--glass-border);
    padding: 1rem 4rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -1px;
    text-decoration: none;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--secondary-container);
    cursor: pointer;
    padding: 0.5rem;
    transition: var(--transition-smooth);
    border-radius: var(--radius-sm);
}

.mobile-menu-btn:hover {
    background: var(--bg-surface-low);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
}

.nav-links a:hover {
    color: var(--secondary-container);
    background: rgba(252, 124, 49, 0.05);
}

.nav-links a.active {
    color: var(--secondary-container);
    background: rgba(252, 124, 49, 0.1);
}

/* Layout Utilities - Grid & Flex */
.row {
    display: flex;
    flex-wrap: wrap;
    margin-right: -1rem;
    margin-left: -1rem;
}

.row > * {
    padding-right: 1rem;
    padding-left: 1rem;
    width: 100%;
}

@media (min-width: 768px) {
    .col-md-4 { flex: 0 0 auto; width: 33.333333%; }
    .col-md-3 { flex: 0 0 auto; width: 25%; }
}
.col-12 { flex: 0 0 auto; width: 100%; }
.col-6 { flex: 0 0 auto; width: 50%; }

.g-4 { margin: -1.5rem; }
.g-4 > * { padding: 1.5rem; }

.g-5 { margin: -2.5rem; }
.g-5 > * { padding: 2.5rem; }

/* Responsive Grid Gaps */
@media (max-width: 992px) {
    .g-5 { margin: -1.5rem; }
    .g-5 > * { padding: 1.5rem; }
}

@media (max-width: 768px) {
    .g-4 { margin: -1rem; }
    .g-4 > * { padding: 1rem; }
    .g-5 { margin: -1rem; }
    .g-5 > * { padding: 1rem; }
}

.d-flex { display: flex !important; }
.justify-content-center { justify-content: center !important; }
.flex-wrap { flex-wrap: wrap !important; }
.gap-3 { gap: 1rem !important; }
.gap-4 { gap: 1.5rem !important; }
.h-100 { height: 100% !important; }
.mt-5 { margin-top: 3rem !important; }
.d-inline-block { display: inline-block !important; }

/* Container */
.container {
    max-width: 1280px;
    margin: 3rem auto;
    padding: 0 2rem;
    flex-grow: 1;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
}

/* Card System - Premium Glass Effect */
.glass-card {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--glass-shadow);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

@media (max-width: 768px) {
    .glass-card {
        padding: 1.5rem;
    }
}

.glass-card:hover {
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.15);
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.35);
}

/* Buttons */
.btn-primary {
    background: var(--secondary);
    color: white;
    border: none;
    padding: 0.85rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px rgba(159, 66, 0, 0.2);
}

.btn-primary:hover {
    background: var(--secondary-container);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(159, 66, 0, 0.3);
}

.btn-secondary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.85rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    display: inline-flex;
}

.btn-secondary:hover {
    background: var(--primary-container);
    transform: translateY(-2px);
}

/* Forms */
input, select, textarea {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    transition: var(--transition-smooth);
    width: 100%;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 15, 34, 0.1);
}

/* Tables */
.table-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 0.5rem;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th {
    padding: 1.25rem;
    text-align: left;
    color: var(--text-dim);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-light);
}

.table td {
    padding: 1.25rem;
    color: var(--text-main);
    border-bottom: 1px solid var(--border-light);
}

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

.table-hover tr:hover td {
    background: var(--bg-surface-low);
}

/* Blog List */
.blog-post-card {
    margin-bottom: 2rem;
}

.blog-post-title {
    font-size: 2rem;
    color: var(--primary);
    text-decoration: none;
    margin-bottom: 0.5rem;
    display: block;
    transition: var(--transition-smooth);
}

.blog-post-title:hover {
    color: var(--secondary);
}

/* Footer */
.footer {
    padding: 4rem 2rem;
    background: var(--primary);
    color: #ffffff;
    text-align: center;
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
}

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

.fade-in-up {
    animation: fadeInUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

@media (max-width: 768px) {
    .navbar { padding: 1rem 1.5rem; }
    .mobile-menu-btn { display: block; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(0, 15, 34, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        flex-direction: column;
        padding: 1.5rem;
        gap: 0.5rem;
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
        z-index: 999;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links a {
        width: 100%;
        text-align: center;
        padding: 0.85rem;
        color: #ffffff;
    }

    .nav-links a:hover {
        background: rgba(255, 255, 255, 0.05);
        color: var(--secondary-container);
    }

    .nav-links a.active {
        background: rgba(252, 124, 49, 0.1);
        color: var(--secondary-container);
    }

    h1 { font-size: 2.25rem; }
    
    .hero-title { font-size: 2.5rem !important; }
    .stat-number { font-size: 2rem !important; }
    .glass-stats-container { padding: 2rem 1rem !important; }
    .cta-card { padding: 2.5rem 1.5rem !important; }
}