/**
 * Layout
 * Navigation, Footer, Container, Grid systems
 */

/* ═══════════════════════════════════════════
   LOADING OVERLAY
═══════════════════════════════════════════ */

.loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 100000;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-6);
}

.loading-logo {
    animation: loadingPulse 1.5s ease-in-out infinite;
}

.loading-bar {
    width: 120px;
    height: 3px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: var(--radius-full);
    animation: loadingProgress 1.2s ease-out forwards;
}

@keyframes loadingPulse {
    0%, 100% {
        opacity: 0.7;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.05);
    }
}

@keyframes loadingProgress {
    0% {
        width: 0%;
    }
    50% {
        width: 70%;
    }
    100% {
        width: 100%;
    }
}

/* ═══════════════════════════════════════════
   CONTAINER
═══════════════════════════════════════════ */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.container--narrow {
    max-width: var(--container-narrow);
}

.container--text {
    max-width: var(--container-text);
}

/* ═══════════════════════════════════════════
   SECTIONS
═══════════════════════════════════════════ */

.section {
    padding-top: var(--section-padding);
    padding-bottom: var(--section-padding);
    position: relative;
}

.section--alt {
    background: var(--color-bg-secondary);
}

.section-header {
    margin-bottom: var(--section-gap);
}

/* ═══════════════════════════════════════════
   HEADER / NAVIGATION
═══════════════════════════════════════════ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    padding: var(--space-4) 0;
    background: transparent;
    backdrop-filter: blur(0);
    -webkit-backdrop-filter: blur(0);
    border-bottom: 1px solid transparent;
    transition:
        background-color 0.4s var(--ease-smooth),
        backdrop-filter 0.3s var(--ease-smooth),
        -webkit-backdrop-filter 0.3s var(--ease-smooth),
        border-color 0.4s var(--ease-smooth),
        padding 0.5s var(--ease-expo-out);
}

/* Accent line under header when scrolled */
.site-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--color-accent-primary) 20%,
            var(--color-accent-secondary) 50%,
            var(--color-accent-primary) 80%,
            transparent 100%);
    opacity: 0;
    transition: opacity 0.5s var(--ease-smooth);
}

.site-header.scrolled::after {
    opacity: 0.3;
}

.site-header.scrolled {
    padding: var(--space-3) 0;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-color: var(--color-border-subtle);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-text-primary);
}

.logo-text {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    letter-spacing: var(--tracking-tight);
}

/* ============================================
   NAVIGATION - Complete Rewrite
   ============================================ */

/* Nav menu - Desktop horizontal layout */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

/* Nav toggle button - hidden on desktop */
.nav-toggle {
    display: none;
}

/* Nav backdrop - hidden on desktop */
.nav-backdrop {
    display: none;
}

/* Nav link styles */
.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: color 0.2s ease, background-color 0.2s ease;
}

/* Animated underline effect */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: var(--space-4);
    right: var(--space-4);
    height: 1px;
    background: var(--color-accent-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease-expo-out);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

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

.nav-link:hover {
    background: var(--color-bg-elevated);
}

.nav-link.active {
    background: var(--gradient-accent-soft);
}

.nav-link.active::after {
    display: none;
}

/* CTA button style */
.nav-link--cta {
    margin-left: var(--space-4);
    background: var(--gradient-accent);
    color: var(--color-text-primary);
}

.nav-link--cta::after {
    display: none;
}

.nav-link--cta:hover {
    background: var(--gradient-accent);
    box-shadow: var(--shadow-glow-sm);
}

/* Toggle button base styles */
.nav-toggle-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Toggle X animation */
.nav-toggle[aria-expanded="true"] .nav-toggle-line:first-child {
    transform: translateY(4px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:last-child {
    transform: translateY(-4px) rotate(-45deg);
}

/* ============================================
   MOBILE NAVIGATION - max-width: 768px
   ============================================ */
@media (max-width: 768px) {

    /* Header adjustments */
    .site-header {
        padding: var(--space-3) 0;
    }

    .site-header.scrolled {
        padding: var(--space-2) 0;
    }

    .nav-container {
        padding: 0 var(--space-4);
    }

    .logo-icon {
        width: 32px;
        height: 32px;
    }

    .logo-text {
        font-size: var(--text-base);
    }

    /* Show toggle button on mobile */
    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 6px;
        width: 44px;
        height: 44px;
        padding: 10px;
        border: none;
        background: transparent;
        cursor: pointer;
        border-radius: var(--radius-md);
        transition: background-color 0.2s ease;
        z-index: 1100;
        position: relative;
    }

    .nav-toggle:hover,
    .nav-toggle:focus {
        background: var(--color-bg-elevated);
        outline: none;
    }

    .nav-toggle[aria-expanded="true"] {
        background: var(--color-bg-elevated);
    }

    /* Mobile slide-out menu */
    .nav-menu {
        position: fixed;
        top: 0;
        right: 0;
        width: min(320px, 85vw);
        height: 100%;
        height: 100vh;
        height: 100dvh;
        margin: 0;
        padding: 100px var(--space-6) var(--space-8);
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-2);
        background: var(--color-bg-secondary);
        border-left: 1px solid var(--color-border-subtle);
        transform: translateX(100%);
        visibility: hidden;
        transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.4s;
        z-index: 1000;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav-menu.open {
        transform: translateX(0);
        visibility: visible;
        box-shadow: -10px 0 40px rgba(0, 0, 0, 0.5);
    }

    /* Mobile nav links */
    .nav-link {
        display: flex;
        align-items: center;
        width: 100%;
        padding: var(--space-4);
        font-size: var(--text-lg);
        min-height: 56px;
        border-radius: var(--radius-lg);
        background: transparent;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover,
    .nav-link:active {
        background: var(--color-bg-elevated);
    }

    .nav-link--cta {
        margin-left: 0;
        margin-top: var(--space-6);
        justify-content: center;
        font-weight: var(--font-semibold);
        background: var(--gradient-accent);
    }

    .nav-link--cta:hover {
        background: var(--gradient-accent);
        box-shadow: var(--shadow-glow-sm);
    }

    /* Backdrop overlay - styles moved to mobile-nav.css */
    .nav-backdrop {
        display: none;
    }
}

/* ============================================
   EXTRA SMALL MOBILE - max-width: 480px
   ============================================ */
@media (max-width: 480px) {
    .site-header {
        padding: var(--space-2) 0;
    }

    .logo-text {
        font-size: var(--text-sm);
    }

    .logo-icon {
        width: 28px;
        height: 28px;
    }

    .nav-toggle {
        width: 40px;
        height: 40px;
        padding: 8px;
    }

    .nav-menu {
        width: min(300px, 90vw);
        padding: calc(var(--space-20) + var(--space-4)) var(--space-4) var(--space-6);
    }

    .nav-link {
        padding: var(--space-3) var(--space-4);
        font-size: var(--text-base);
        min-height: 48px;
    }

    .nav-link--cta {
        min-height: 52px;
    }
}

/* ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */

.site-footer {
    position: relative;
    padding-top: var(--section-padding);
    padding-bottom: var(--space-8);
    background: var(--color-bg-secondary);
}

/* Gradient wave divider */
.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--color-border-default) 20%,
            var(--color-accent-primary) 50%,
            var(--color-border-default) 80%,
            transparent 100%);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--space-16);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--color-border-subtle);
}

.footer-brand .logo {
    margin-bottom: var(--space-4);
}

.footer-tagline {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    max-width: 280px;
}

/* Mini CTA in footer */
.footer-cta {
    margin-top: var(--space-6);
}

.footer-cta-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-accent-primary);
    transition: gap 0.3s var(--ease-expo-out), color 0.2s var(--ease-smooth);
}

.footer-cta-link:hover {
    gap: var(--space-3);
    color: var(--color-accent-tertiary);
}

.footer-cta-link svg {
    width: 16px;
    height: 16px;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
}

.footer-nav-group h4 {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.footer-nav-group ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.footer-nav-group a {
    position: relative;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    transition: color 0.2s var(--ease-smooth);
    display: inline-block;
}

/* Animated underline for footer links */
.footer-nav-group a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--color-accent-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s var(--ease-expo-out);
}

.footer-nav-group a:hover {
    color: var(--color-text-primary);
}

.footer-nav-group a:hover::after {
    transform: scaleX(1);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
}

.footer-copyright {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--text-sm);
}

.footer-legal a {
    color: var(--color-text-tertiary);
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: var(--color-text-primary);
}

.footer-legal .separator {
    color: var(--color-text-muted);
}

@media (max-width: 900px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .footer-nav {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .footer-nav {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

/* ═══════════════════════════════════════════
   CURSOR GLOW (Desktop enhancement)
═══════════════════════════════════════════ */

.cursor-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 600px;
    height: 600px;
    pointer-events: none;
    z-index: var(--z-max);
    opacity: 0;
    background: radial-gradient(circle,
            rgba(99, 102, 241, 0.08) 0%,
            rgba(99, 102, 241, 0.03) 30%,
            transparent 60%);
    transition: opacity 0.3s ease;
    transform: translate(-50%, -50%);
}

@media (hover: hover) and (pointer: fine) {
    .cursor-glow {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .cursor-glow {
        display: none;
    }
}