/* css/layout.css - Shell layout: canvas, nav, content area, cursor, footer */

/* Skip link */
.skip-link {
    position: absolute;
    top: -100%;
    left: 16px;
    z-index: 9999;
    padding: 8px 16px;
    background: var(--accent);
    color: var(--bg);
    border-radius: 4px;
    font-weight: 600;
}
.skip-link:focus { top: 16px; }

/* Three.js canvas */
#scene {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* Scroll progress bar */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    background: var(--accent);
    z-index: 101;
    width: 0%;
    transition: none;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    background: rgba(6, 8, 13, 0.75);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

nav.scrolled {
    height: 56px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.nav-inner {
    width: 100%;
    max-width: 1200px;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    background: linear-gradient(135deg, var(--accent), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a,
.nav-link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after,
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s;
}

.nav-links a:hover,
.nav-link:hover { color: var(--accent); }
.nav-links a:hover::after,
.nav-link:hover::after { width: 100%; }

.nav-link.active { color: var(--accent); }
.nav-link.active::after { width: 100%; }

.lang-toggle {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    transition: all 0.3s;
}

.lang-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
    background: var(--accent-glow);
}

/* Mobile nav toggle */
.nav-hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    padding: 0.5rem;
}

/* Main content area */
#content {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    padding-top: var(--nav-h);
}

/* Custom cursor */
.cursor-dot {
    position: fixed;
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    opacity: 0;
}

.cursor-dot.active {
    opacity: 1;
}

.cursor-ring {
    position: fixed;
    width: 40px;
    height: 40px;
    border: 1.5px solid var(--accent);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    transform: translate(-50%, -50%);
    transition: width 0.2s ease, height 0.2s ease, border-color 0.2s ease;
    opacity: 0;
}

.cursor-ring.active {
    opacity: 0.6;
}

.cursor-ring.hover {
    width: 60px;
    height: 60px;
}

.cursor-ring.click {
    width: 30px;
    height: 30px;
}

/* Hide custom cursor on touch devices */
@media (hover: none) {
    .cursor-dot, .cursor-ring { display: none; }
    body { cursor: auto; }
}

/* Mobile menu overlay */
.mobile-menu {
    position: fixed;
    inset: 0;
    z-index: 99;
    background: rgba(6, 8, 13, 0.95);
    backdrop-filter: blur(30px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.mobile-menu.open { opacity: 1; pointer-events: all; }

.mobile-nav-link {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease, transform 0.4s ease, color 0.3s ease;
}

.mobile-menu.open .mobile-nav-link {
    opacity: 1;
    transform: translateY(0);
}

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

/* Footer */
footer {
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.85rem;
    font-family: var(--font-display);
}

footer a {
    color: var(--accent);
    transition: opacity 0.3s;
}
footer a:hover { opacity: 0.8; }

.mobile-break { display: none; }
@media (max-width: 768px) { .mobile-break { display: block; } }

/* Mobile responsive nav */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--nav-h);
        left: 0;
        right: 0;
        background: rgba(6, 8, 13, 0.95);
        backdrop-filter: blur(20px);
        padding: 1.5rem 2rem;
        border-bottom: 1px solid var(--border);
        gap: 1.25rem;
    }
    .nav-hamburger { display: block; }
}