/* ===== RESET & BASE ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary:    #002699;
    --accent:     #3385ff;
    --dark:       #1a1a2e;
    --light-bg:   #f4f6fb;
    --card-bg:    #ffffff;
    --text:       #222222;
    --text-muted: #666666;
    --border:     #dce3f3;
    --nav-bg:     #0d1b5e;
    --nav-hover:  #3385ff;
    --footer-bg:  #0d1b5e;
    --tag-bg:     #e8eeff;
    --tag-color:  #002699;
    --radius:     8px;
    --shadow:     0 2px 12px rgba(0,38,153,0.08);
    --transition: 0.25s ease;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Segoe UI', Arial, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }

ul { list-style: none; }

/* ===== LAYOUT WRAPPER ===== */
.wrapper {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== HEADER ===== */
header {
    background: var(--nav-bg);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

header .wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 14px;
    padding-bottom: 14px;
}

.logo {
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo span { color: var(--accent); }

/* ===== NAV ===== */
nav ul {
    display: flex;
    gap: 6px;
}

nav ul li a {
    color: #cdd5f5;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 8px 18px;
    border-radius: 25px;
    border: 2px solid transparent;
    transition: all var(--transition);
    display: block;
}

nav ul li a:hover,
nav ul li a.active {
    color: #fff;
    background-color: var(--nav-hover);
    border-color: var(--nav-hover);
}

/* ===== HERO SECTION ===== */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #1a4fd6 60%, var(--accent) 100%);
    color: #fff;
    padding: 70px 0 60px;
    text-align: center;
}

.hero-avatar {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255,255,255,0.5);
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}

.hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.hero .tagline {
    font-size: 1.15rem;
    opacity: 0.9;
    margin-bottom: 20px;
}

.hero .bio {
    max-width: 640px;
    margin: 0 auto 28px;
    font-size: 1rem;
    opacity: 0.85;
    line-height: 1.7;
}

.btn {
    display: inline-block;
    padding: 11px 28px;
    border-radius: 25px;
    font-weight: 700;
    font-size: 0.95rem;
    transition: all var(--transition);
    margin: 4px;
}

.btn-outline {
    border: 2px solid #fff;
    color: #fff;
}

.btn-outline:hover {
    background: #fff;
    color: var(--primary);
}

.btn-solid {
    background: #fff;
    color: var(--primary);
    border: 2px solid #fff;
}

.btn-solid:hover {
    background: transparent;
    color: #fff;
}

/* ===== SECTIONS ===== */
section {
    padding: 56px 0;
}

section:nth-of-type(even) { background: #fff; }

.section-title {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 36px;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--accent);
    margin: 10px auto 0;
    border-radius: 2px;
}

/* ===== TIMELINE (Experience & Education) ===== */
.timeline { position: relative; padding-left: 28px; }

.timeline::before {
    content: '';
    position: absolute;
    left: 9px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    margin-bottom: 36px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--primary);
}

.timeline-date {
    font-size: 0.82rem;
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.timeline-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 2px;
}

.timeline-company {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.timeline-body { font-size: 0.9rem; }
.timeline-body ul { list-style: disc; padding-left: 18px; margin-top: 6px; }
.timeline-body ul li { margin-bottom: 4px; }

/* ===== SKILL TAGS ===== */
.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.skill-tag {
    background: var(--tag-bg);
    color: var(--tag-color);
    border: 1px solid var(--border);
    padding: 7px 16px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition);
}

.skill-tag:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ===== CARDS (Projects) ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,38,153,0.14);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.card-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 14px;
    line-height: 1.6;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.card-tag {
    background: var(--tag-bg);
    color: var(--tag-color);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 12px;
    border: 1px solid var(--border);
}

/* ===== CONTACT ===== */
.contact-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 36px;
    box-shadow: var(--shadow);
    text-align: center;
    min-width: 220px;
    transition: transform var(--transition);
}

.contact-card:hover { transform: translateY(-4px); }

.contact-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.contact-value {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary);
}

.contact-value a {
    color: var(--primary);
}

.contact-value a:hover { color: var(--accent); }

/* ===== LANGUAGE TABLE ===== */
.lang-table {
    width: 100%;
    max-width: 620px;
    margin: 0 auto;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.lang-table th, .lang-table td {
    padding: 10px 14px;
    text-align: center;
    border: 1px solid var(--border);
}

.lang-table thead th {
    background: var(--primary);
    color: #fff;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.lang-table tbody td:first-child {
    font-weight: 700;
    color: var(--primary);
    text-align: left;
}

.lang-table tbody tr:nth-child(even) { background: var(--tag-bg); }

/* ===== INFO BOXES ===== */
.info-boxes {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    text-align: center;
}

.info-box {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 16px;
    box-shadow: var(--shadow);
    flex: 0 1 220px;
}

.info-box-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
}

.info-box-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== FOOTER ===== */
footer {
    background: var(--footer-bg);
    color: rgba(255,255,255,0.7);
    text-align: center;
    padding: 24px;
    font-size: 0.88rem;
}

footer a { color: var(--accent); }
footer a:hover { color: #fff; }

/* ===== LANG TABLE WRAPPER ===== */
.lang-table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 620px;
    margin: 0 auto;
}

.lang-table-wrap .lang-table {
    max-width: none;
    margin: 0;
    min-width: 480px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 700px) {
    .hero h1 { font-size: 1.7rem; }
    nav ul { gap: 2px; }
    nav ul li a { padding: 7px 12px; font-size: 0.85rem; }
    .cards-grid { grid-template-columns: 1fr; }
    header .wrapper { flex-direction: column; gap: 10px; }
    .lang-table th, .lang-table td { padding: 8px 10px; font-size: 0.8rem; }
}