.container {
    width: 100%;
    max-width: var(--container-w);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.section {
    padding-block: var(--space-24);
}

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

.section-title {
    text-align: center;
    margin-block-end: var(--space-2);
    font-size: var(--text-2xl);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-block-end: var(--space-12);
    font-size: var(--text-lg);
}

/* ── Projects Grid ── */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
}

@media (min-width: 768px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ── Skills Layout ── */
.skill-group {
    margin-block-end: var(--space-8);
}

.skill-group:last-child {
    margin-block-end: 0;
}

.skill-group-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-block-end: var(--space-4);
    padding-block-end: var(--space-2);
    border-block-end: 2px solid var(--color-border);
}

.skills-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 768px) {
    .skills-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Timeline ── */
.timeline {
    position: relative;
    padding-inline-start: var(--space-8);
}

.timeline::before {
    content: '';
    position: absolute;
    inset-inline-start: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-block-end: var(--space-8);
}

.timeline-item:last-child {
    margin-block-end: 0;
}

/* ── Hero ── */
.hero-section {
    background: var(--hero-gradient);
    padding-block: var(--space-24);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 720px;
}

.hero-greeting {
    font-size: var(--text-lg);
    color: var(--color-primary);
    font-weight: 500;
    margin-block-end: var(--space-2);
}

.hero-name {
    font-size: var(--text-3xl);
    margin-block-end: var(--space-3);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-block-end: var(--space-6);
}

.hero-bio {
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-block-end: var(--space-8);
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    flex-wrap: wrap;
}

/* ── Navigation ── */
.site-nav {
    position: fixed;
    top: 0;
    inset-inline: 0;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(var(--nav-blur));
    -webkit-backdrop-filter: blur(var(--nav-blur));
    border-block-end: 1px solid var(--color-border-light);
    padding-block: var(--space-3);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--color-text);
}

.nav-links {
    display: none;
    list-style: none;
    gap: var(--space-6);
    align-items: center;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

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

    .hero-section {
        padding-block-start: calc(var(--space-24) + 60px);
    }
}

/* ── Footer ── */
.site-footer {
    padding-block: var(--space-8);
    border-block-start: 1px solid var(--color-border);
    text-align: center;
}

.footer-text {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-block-end: 0;
}

/* ── Responsive ── */
@media (max-width: 767px) {
    :root {
        --text-3xl: 2.25rem;
        --text-2xl: 1.75rem;
    }

    .section {
        padding-block: var(--space-16);
    }

    .section-subtitle {
        margin-block-end: var(--space-8);
    }

    .hero-section {
        min-height: 70vh;
        padding-block-start: calc(var(--space-16) + 60px);
    }
}