/* ========================================
   LAYOUT — Navbar, Sections, Responsive
   ======================================== */

/* ---- NAVBAR ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-lg);
    width: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: 'Oswald', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-brand .brand-accent {
    color: var(--accent);
    margin-left: 0.15em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-links a {
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    position: relative;
    padding-bottom: 2px;
    transition: color var(--transition-fast);
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Theme toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    transition: color var(--transition-fast), background var(--transition-fast);
}

.theme-toggle:hover {
    color: var(--accent);
    background: var(--accent-subtle);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

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

.theme-toggle .icon-moon {
    display: block;
}

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

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

/* Hamburger */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
}

.nav-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---- HERO ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('../assets/hero-desktop.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg,
            rgba(13, 13, 13, 0.4) 0%,
            rgba(13, 13, 13, 0.85) 70%,
            var(--bg-primary) 100%);
    z-index: 1;
}

[data-theme="light"] .hero-overlay {
    background: linear-gradient(180deg,
            rgba(245, 245, 245, 0.3) 0%,
            rgba(245, 245, 245, 0.8) 70%,
            var(--bg-primary) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    padding: 0 var(--container-padding);
}

.hero-content h1 {
    margin-bottom: var(--space-md);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ---- SECTION HEADER ---- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    margin-bottom: var(--space-sm);
}

.section-header p {
    margin: 0 auto;
    font-size: 1.05rem;
}

.section-header .header-line {
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: var(--space-md) auto 0;
    border-radius: var(--radius-full);
}

/* ---- GRIDS ---- */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    align-items: center;
}

/* ---- ABOUT SPLIT ---- */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-text h3 {
    margin-bottom: var(--space-md);
}

.about-text p {
    margin-bottom: var(--space-md);
}

.about-visual {
    position: relative;
    aspect-ratio: 4/3;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.about-visual-inner {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-elevated));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-visual-inner .decorative-icon {
    font-size: 4rem;
    opacity: 0.15;
}

/* ---- CONTACT LAYOUT ---- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* ---- FOOTER ---- */
.footer {
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-xl) 0;
    text-align: center;
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0 auto;
}

/* ---- SPEED LINES (Hero decoration) ---- */
.speed-lines {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
    pointer-events: none;
}

.speed-lines span {
    position: absolute;
    width: 150px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
    animation: speedLine 3s linear infinite;
    opacity: 0;
}

.speed-lines span:nth-child(1) {
    top: 20%;
    left: -150px;
    animation-delay: 0s;
}

.speed-lines span:nth-child(2) {
    top: 40%;
    left: -150px;
    animation-delay: 0.8s;
    width: 200px;
}

.speed-lines span:nth-child(3) {
    top: 60%;
    left: -150px;
    animation-delay: 1.6s;
    width: 120px;
}

.speed-lines span:nth-child(4) {
    top: 75%;
    left: -150px;
    animation-delay: 2.2s;
    width: 180px;
}

.speed-lines span:nth-child(5) {
    top: 35%;
    left: -150px;
    animation-delay: 0.4s;
    width: 100px;
}

@keyframes speedLine {
    0% {
        transform: translateX(0);
        opacity: 0;
    }

    10% {
        opacity: 0.6;
    }

    90% {
        opacity: 0.6;
    }

    100% {
        transform: translateX(calc(100vw + 300px));
        opacity: 0;
    }
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 100vh;
        flex-direction: column;
        background: #0d0d0d;
        padding: calc(var(--nav-height) + var(--space-2xl)) var(--space-xl) var(--space-2xl);
        gap: 0;
        transform: translateX(100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 998;
        justify-content: center;
        align-items: center;
    }

    .nav-links.open {
        transform: translateX(0);
    }

    [data-theme="light"] .nav-links {
        background: #f5f5f5;
    }

    .nav-links a {
        font-size: 1.4rem;
        letter-spacing: 0.08em;
        padding: var(--space-lg) 0;
        width: 80%;
        text-align: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        transition: color var(--transition-fast), text-shadow var(--transition-fast);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    .nav-links a:hover,
    .nav-links a.active {
        text-shadow: 0 0 20px var(--accent-glow);
    }

    [data-theme="light"] .nav-links a {
        border-bottom-color: rgba(0, 0, 0, 0.08);
    }

    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .grid-2,
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero-bg {
        background-image: url('../assets/hero-mobile.png');
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .section {
        padding: var(--space-2xl) 0;
    }

    .about-visual {
        order: -1;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
}