/* ── CSS Variables ── */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --text-primary: #e8e8e8;
    --text-secondary: #b8b8b8;
    --accent-primary: #00d4aa;
    --accent-secondary: #0099ff;
    --border-color: #2a2a2a;
    --accent-primary-hover: #00f5c8;
}

/* ── Skip to Content ── */
.skip-to-content {
    position: absolute;
    top: -100%;
    left: 0;
    padding: 0.75rem 1.5rem;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-weight: 600;
    z-index: 9999;
    transition: top 0.2s ease;
}

.skip-to-content:focus {
    top: 0;
}

/* ── Reset ── */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

/* ── Navigation ── */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-image {
    height: 40px;
    width: auto;
    transition: opacity 0.3s ease;
}

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

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

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

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

.nav-links a.nav-active {
    color: var(--accent-primary);
}

/* ── Hamburger Menu ── */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

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

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

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

.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-overlay.active {
    display: block;
    opacity: 1;
}

/* ── Footer ── */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-links {
    margin-bottom: 1rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-primary);
}

.footer-links a + a::before {
    content: '|';
    margin: 0 1rem;
    color: var(--border-color);
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ── Responsive: Mobile ── */
@media (max-width: 480px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        height: 100vh;
        width: 70%;
        max-width: 300px;
        background: var(--bg-secondary);
        flex-direction: column;
        gap: 0;
        padding: 5rem 2rem 2rem;
        border-left: 1px solid var(--border-color);
        transition: right 0.3s ease;
        z-index: 1000;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-links a {
        display: block;
        padding: 1rem 0;
        font-size: 1rem;
    }

    .nav-links a::after {
        display: none;
    }
}