/**
 * main.css - Reset, Layout, Header, Footer & Global Animations
 */

@import url('variables.css');

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    line-height: 1.6;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

main {
    flex: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.25;
}

.font-serif {
    font-family: var(--font-serif);
}

h1.font-serif, h2.font-serif {
    font-weight: 500;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

p:last-child {
    margin-bottom: 0;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Shared Layout Containers */
.container {
    width: 100%;
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    max-width: var(--max-width-nav);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-xl) 0;
}

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-lg) 0;
    }
}

/* Elegant Glassmorphism Header */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(250, 250, 252, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

[data-theme="dark"] .header {
    background: rgba(10, 10, 12, 0.75);
}

.header .container-fluid {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 100px;
    width: auto;
    display: block;
    object-fit: contain;
    transform: scale(1.3);
    transform-origin: left center;
    transition: opacity 0.2s ease, transform 0.2s ease;
    /* Ensure no background bleed */
    background: transparent;
}

.logo-img:hover {
    opacity: 0.8;
}

/* In dark mode: invert the logo so dark navy becomes white/light */
[data-theme="dark"] .logo-img {
    filter: invert(1) hue-rotate(180deg) brightness(1.1);
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.25rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

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

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

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

/* Utilities on Navbar */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Dark Mode Toggle Switcher */
.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

.theme-toggle-btn svg {
    width: 18px;
    height: 18px;
}

.theme-toggle-btn .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle-btn .sun-icon {
    display: block;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
}

.mobile-nav-toggle svg {
    width: 24px;
    height: 24px;
}

/* Responsive Menu */
@media (max-width: 900px) {
    .mobile-nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--card-bg);
        border-bottom: 1px solid var(--border-color);
        padding: var(--spacing-lg) var(--spacing-xl);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        width: 100%;
        font-size: 1.1rem;
        padding: 0.5rem 0;
    }
}

/* Premium Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    font-size: 0.95rem;
    transition: background var(--transition-normal), border-color var(--transition-normal);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col-about p {
    margin-top: var(--spacing-md);
    max-width: 320px;
}

.footer-title {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-link {
    color: var(--text-secondary);
}

.footer-link:hover {
    color: var(--accent);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--card-bg);
    background-color: var(--text-primary);
    border-color: var(--text-primary);
    transform: translateY(-2px);
}

.footer-newsletter p {
    margin-bottom: var(--spacing-md);
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.footer-bottom-links {
    display: flex;
    gap: var(--spacing-md);
}

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 600px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

/* Animation Utilities */
.fade-in {
    opacity: 0;
    animation: fadeIn var(--transition-slow) forwards;
}

.slide-up {
    opacity: 0;
    transform: translateY(20px);
    animation: slideUp var(--transition-slow) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

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

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

/* Floating Mockup Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(-1deg);
    }
    50% {
        transform: translateY(-12px) rotate(1deg);
    }
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}