:root {
    --color-bg: #0d1117;
    --color-surface: #161b22;
    --color-border: #30363d;
    --color-text: #e6edf3;
    --color-muted: #8b949e;
    --color-accent: #58a6ff;
    --color-accent-hover: #79c0ff;
}

/* ── Base ─────────────────────────────────────────── */
html, body {
    margin: 0;
    padding: 0;
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    scroll-behavior: smooth;
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
    min-height: 100vh;
    background: linear-gradient(160deg, #0d1117 60%, #161b22 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.07) 0%, transparent 70%);
    pointer-events: none;
}

.hero h1 {
    color: var(--color-text);
    letter-spacing: -1px;
}

.text-accent {
    color: var(--color-accent);
}

/* ── Hero Avatar ──────────────────────────────────── */
.hero-avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--color-border);
    box-shadow: 0 0 0 6px rgba(88, 166, 255, 0.1);
}

/* ── Hero Motto ───────────────────────────────────── */
.hero-motto {
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--color-muted);
}

.motto-sep {
    color: var(--color-accent);
    font-size: 0.6rem;
    vertical-align: middle;
    margin: 0 0.4em;
}

/* ── Interest Cards ───────────────────────────────── */
.interest-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.25rem 0.75rem;
    text-align: center;
    transition: border-color 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    height: 100%;
}

.interest-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.interest-card i {
    font-size: 1.75rem;
    color: var(--color-accent);
    width: 100%;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.interest-card span {
    font-size: 0.8rem;
    color: var(--color-muted);
    font-weight: 500;
}

/* ── Sections ─────────────────────────────────────── */
.section-padded {
    padding: 5rem 0;
}

.bg-dark-subtle {
    background-color: var(--color-surface) !important;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* ── About text ───────────────────────────────────── */
.text-muted {
    color: var(--color-muted) !important;
}

.text-link {
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

.text-link:hover {
    color: var(--color-accent-hover);
    border-bottom-color: var(--color-accent-hover);
}

/* ── Skill Cards ──────────────────────────────────── */
.skill-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 2rem 1.75rem;
    transition: border-color 0.2s, transform 0.2s;
}

.skill-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.skill-icon {
    font-size: 2.25rem;
    color: var(--color-accent);
}

.skill-card h4 {
    color: var(--color-text);
    font-weight: 600;
    margin: 0;
}

.skill-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.skill-list li {
    color: var(--color-muted);
    padding: 0.3rem 0;
    font-size: 0.95rem;
}

.skill-list li::before {
    content: '▸ ';
    color: var(--color-accent);
    font-size: 0.8rem;
}

/* ── Social Links ─────────────────────────────────── */
.social-links a {
    color: var(--color-muted);
    font-size: 1.75rem;
    transition: color 0.2s, transform 0.2s;
    display: inline-block;
}

.social-links a:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

/* ── Buttons ──────────────────────────────────────── */
.btn-primary {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: #0d1117;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    color: #0d1117;
}

.btn-outline-light {
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-outline-light:hover {
    background-color: var(--color-surface);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ── Contact Form ─────────────────────────────────── */
.form-label {
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-control-dark {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    border-radius: 8px;
    transition: border-color 0.2s;
}

.form-control-dark:focus {
    background-color: var(--color-surface);
    border-color: var(--color-accent);
    color: var(--color-text);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
    outline: none;
}

.form-control-dark::placeholder {
    color: var(--color-muted);
}

.form-error {
    color: #f85149;
    font-size: 0.825rem;
    margin-top: 0.3rem;
}

/* ── Experience Timeline ──────────────────────────── */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.timeline-item--last {
    margin-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -2.45rem;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-border);
    border: 2px solid var(--color-surface);
    transition: background 0.2s;
}

.timeline-marker--military {
    background: var(--color-accent);
}

.timeline-item:hover .timeline-marker {
    background: var(--color-accent);
}

.timeline-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 1.5rem 1.75rem;
    transition: border-color 0.2s;
}

.timeline-card:hover {
    border-color: var(--color-accent);
}

.timeline-card--military {
    border-color: rgba(88, 166, 255, 0.3);
    background: rgba(88, 166, 255, 0.04);
}

.timeline-role {
    color: var(--color-text);
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0;
}

.timeline-company {
    color: var(--color-muted);
    font-size: 0.9rem;
    margin: 0.2rem 0 0;
}

.timeline-date {
    color: var(--color-accent);
    font-size: 0.82rem;
    font-weight: 500;
    white-space: nowrap;
    padding-top: 0.15rem;
}

/* ── Tech Tags ────────────────────────────────────── */
.tech-tags {
    border-top: 1px solid var(--color-border);
    padding-top: 2.5rem;
}

.tech-tags-label {
    text-align: center;
    color: var(--color-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

.tech-tag-group {
    margin-bottom: 1.5rem;
}

.tech-tag-group:last-child {
    margin-bottom: 0;
}

.tech-tag-group-label {
    text-align: center;
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.6rem;
}

.tech-tag {
    display: inline-block;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    font-size: 0.8rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    transition: border-color 0.2s, color 0.2s;
}

.tech-tag:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* ── Footer ───────────────────────────────────────── */
.footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
}