/* 
   Aura Vent Ltd - Source of Truth for Global Styles
   Mechanical Precision & Atmospheric Clarity
*/

:root {
    --primary: #1c1c1c;
    --primary-fixed: #e0e0e0;
    --on-surface-variant: #3d4947;
    --surface-variant: #d9e3f6;
    --surface: #f8f9ff;
    --on-surface: #121c2a;
    --outline-variant: #bcc9c6;
    --transition-base: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark {
    --surface: #0a111a;
    --on-surface: #f4faff;
    --on-surface-variant: #aebdb9;
    --surface-variant: #2d3840;
    --outline-variant: #3a4745;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Material Symbols Base Configuration */
.material-symbols-outlined {
    font-family: 'Material Symbols Outlined';
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    -webkit-font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* Glassmorphism Navigation Component */
.glass-nav {
    background-color: rgba(240, 242, 250, 0.72) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(0, 104, 95, 0.08) !important;
    transition: all var(--transition-base);
}

.dark .glass-nav {
    background-color: rgba(8, 14, 22, 0.75) !important;
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(137, 245, 231, 0.08) !important;
}

/* Navigation Link Hover Effects */
.nav-link {
    position: relative;
    transition: color 0.3s ease;
    color: var(--on-surface-variant);
    display: flex;
    align-items: center;
    height: 100%;
}

.dark .nav-link {
    color: var(--on-surface-variant);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 24px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width 0.4s cubic-bezier(0.65, 0, 0.35, 1);
}

.dark .nav-link::after {
    background-color: var(--primary-fixed);
}

.nav-link:hover {
    color: var(--primary);
}

.dark .nav-link:hover {
    color: var(--primary-fixed);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link-active {
    color: var(--primary) !important;
}

.dark .nav-link-active {
    color: var(--primary-fixed) !important;
}

.nav-link-active::after {
    width: 100% !important;
}

/* Theme Toggle Button */
#theme-toggle {
    transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#theme-toggle:hover {
    transform: rotate(30deg);
}

#theme-toggle:active {
    transform: scale(0.9);
}

/* Mobile Menu Drawer */
#mobile-menu {
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    background-color: rgba(248, 249, 255, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
}

.dark #mobile-menu {
    background-color: rgba(10, 17, 26, 0.98);
}

.mobile-nav-link {
    font-family: 'Hanken Grotesk', sans-serif;
    font-size: 24px;
    font-weight: 600;
    color: var(--on-surface);
    padding: 1.5rem 0;
    border-bottom: 1px solid rgba(109, 122, 119, 0.1);
    width: 100%;
    display: block;
    transition: all 0.3s ease;
}

.mobile-nav-link:hover {
    color: var(--primary);
    transform: translateX(12px);
}

.mobile-nav-link-active {
    color: var(--primary);
}

/* Premium Card Hover Effects */
.premium-card {
    transition: transform 0.4s cubic-bezier(0.2, 0, 0, 1), box-shadow 0.4s cubic-bezier(0.2, 0, 0, 1), border-color 0.4s ease;
}

.premium-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.12);
}

.dark .premium-card:hover {
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.4);
}

/* Vibrant Gradients */
.vibrant-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, #404040 100%);
}

.vibrant-gradient-hover:hover {
    background: linear-gradient(135deg, #404040 0%, var(--primary) 100%);
}

/* Global Selection Style */
::selection {
    background-color: var(--primary);
    color: #ffffff;
}