/* ===== CSS Variables / Theme ===== */
:root {
    --bg: #171717;
    --text: #fbfbfb;
    --text-secondary: #888;
    --border: #333;
    --nav-bg: #171717;
    --hover: #222;
    --link: #ccc;
    --link-hover: #fff;
    --card-bg: #1e1e1e;
    --card-shadow: rgba(0, 0, 0, 0.4);
    --accent: #4a9eff;
    --accent-dim: rgba(74, 158, 255, 0.1);
    --accent-border: rgba(74, 158, 255, 0.3);
}

[data-theme="light"] {
    --bg: #f8f8f8;
    --text: #111;
    --text-secondary: #666;
    --border: #ddd;
    --nav-bg: #f8f8f8;
    --hover: #eee;
    --link: #444;
    --link-hover: #000;
    --card-bg: #fff;
    --card-shadow: rgba(0, 0, 0, 0.15);
    --accent: #2563eb;
    --accent-dim: rgba(37, 99, 235, 0.08);
    --accent-border: rgba(37, 99, 235, 0.25);
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    background-color: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background-color 0.3s, color 0.3s;
}

/* ===== Navigation ===== */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    position: sticky;
    top: 0;
    background-color: var(--nav-bg);
    z-index: 100;
    border-bottom: 1px solid var(--border);
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0.5px;
    transition: color 0.2s;
    padding: 4px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
}

.nav-link.active {
    border-bottom: 1.5px solid var(--text);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 16px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: 6px;
    transition: background-color 0.2s;
    line-height: 1;
}

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

/* ===== CV Wrapper ===== */
.cv-wrapper {
    max-width: 750px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

/* ===== CV Header ===== */
.cv-header {
    text-align: center;
    padding-bottom: 32px;
    margin-bottom: 32px;
    border-bottom: 1px solid var(--border);
}

.cv-header h1 {
    font-size: 32px;
    margin-bottom: 6px;
}

.cv-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.cv-contact {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.cv-contact a {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

.cv-contact a:hover {
    opacity: 0.8;
}

.cv-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.lang-toggle {
    background: none;
    border: 1px solid var(--accent-border);
    color: var(--accent);
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
    padding: 6px 16px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

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

.pdf-btn {
    display: inline-block;
    border: 1px solid var(--border);
    color: var(--text);
    font-family: inherit;
    font-size: 13px;
    text-decoration: none;
    padding: 6px 16px;
    border-radius: 6px;
    transition: background-color 0.2s;
}

.pdf-btn:hover {
    background-color: var(--hover);
}

/* ===== Section ===== */
.cv-section {
    margin-bottom: 36px;
}

.section-title {
    font-size: 13px;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

/* ===== Timeline ===== */
.timeline {
    padding-left: 20px;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 3px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 24px;
    margin-bottom: 24px;
}

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

.timeline-dot {
    position: absolute;
    left: -21px;
    top: 6px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--accent);
}

.timeline-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.timeline-content h3 {
    font-size: 15px;
    margin-bottom: 3px;
    line-height: 1.4;
}

.timeline-content .org {
    font-size: 13px;
    color: var(--accent);
    margin-bottom: 4px;
}

.timeline-content p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.badge {
    display: inline-block;
    padding: 2px 10px;
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    border-radius: 4px;
    font-size: 12px;
    color: var(--accent);
    margin-bottom: 6px;
}

/* ===== Skills ===== */
.skills-group {
    margin-bottom: 20px;
}

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

.skills-group h3 {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-tag {
    display: inline-block;
    padding: 5px 14px;
    background: var(--accent-dim);
    border: 1px solid var(--accent-border);
    border-radius: 5px;
    font-size: 13px;
    font-family: inherit;
    color: var(--accent);
    transition: background-color 0.2s;
}

.skill-tag:hover {
    background: var(--accent-border);
}

/* ===== PDF Download Section ===== */
.pdf-links {
    display: flex;
    gap: 16px;
}

.pdf-card {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--text);
    font-size: 14px;
    transition: background-color 0.2s, border-color 0.2s;
}

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

.pdf-icon {
    font-size: 28px;
}

/* ===== Responsive ===== */
@media screen and (max-width: 768px) {
    .navbar {
        padding: 16px 20px;
    }

    .nav-links {
        gap: 16px;
    }

    .nav-link {
        font-size: 13px;
    }

    .cv-wrapper {
        padding: 24px 16px 60px;
    }

    .cv-header h1 {
        font-size: 26px;
    }

    .cv-contact {
        flex-direction: column;
        gap: 4px;
    }

    .timeline-content h3 {
        font-size: 14px;
    }

    .pdf-links {
        flex-direction: column;
    }
}

@media screen and (max-width: 375px) {
    .nav-links {
        gap: 12px;
    }

    .nav-link {
        font-size: 12px;
    }

    .cv-header h1 {
        font-size: 22px;
    }

    .cv-actions {
        flex-direction: column;
        align-items: center;
    }
}