/* ===== CSS Variables ===== */
:root {
    --color-primary: #1a365d;
    --color-primary-light: #2b4c7e;
    --color-accent: #c9a84c;
    --color-accent-light: #dbbe6e;
    --color-bg: #fafafa;
    --color-bg-alt: #ffffff;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-border: #e2e8f0;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.09);
    --transition: 0.3s ease;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg-alt);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1060px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-light);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: var(--transition);
}

.nav-links a:hover { color: var(--color-primary); }
.nav-links a:hover::after { width: 100%; }

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 92vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(135deg, #f7f8fc 0%, #eef1f8 50%, #f0ebe3 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(201,168,76,0.07) 0%, transparent 70%);
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    padding-top: 64px;
}

.hero-text { max-width: 560px; }

.hero-greeting {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.hero-name {
    font-family: var(--font-heading);
    font-size: 3.4rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.15;
    margin-bottom: 12px;
}

.hero-title {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-text-light);
    margin-bottom: 14px;
    padding-left: 3px;
}

.hero-tagline {
    font-size: 0.98rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 28px;
    max-width: 460px;
}

.hero-cta { display: flex; gap: 14px; }

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.hero-visual {
    position: relative;
    flex-shrink: 0;
}

.hero-image-wrapper {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--color-accent);
    box-shadow: var(--shadow-lg);
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}


.hero-scroll {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.hero-scroll a {
    text-decoration: none;
    color: var(--color-text-light);
    font-size: 0.75rem;
    letter-spacing: 1px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.scroll-arrow {
    width: 16px;
    height: 16px;
    border-right: 2px solid var(--color-text-light);
    border-bottom: 2px solid var(--color-text-light);
    transform: rotate(45deg);
    animation: scrollBounce 2s ease infinite;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); }
    50% { transform: rotate(45deg) translateY(5px); }
}

/* ===== Sections — seamless flow ===== */
.section {
    padding: 64px 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 1.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 40px;
    height: 2.5px;
    background: var(--color-accent);
    margin: 12px auto 0;
    border-radius: 2px;
}

/* ===== About ===== */
.about { background: var(--color-bg-alt); }

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-lead {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 12px;
    line-height: 1.7;
}

.about-text p {
    color: var(--color-text-light);
    font-size: 0.92rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.stat-card {
    text-align: center;
    padding: 20px 12px;
    background: var(--color-bg);
    border-radius: 10px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 2px;
}

.stat-label {
    font-size: 0.72rem;
    color: var(--color-text-light);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

/* ===== Experience Timeline ===== */
.experience {
    background: var(--color-bg);
}

.timeline {
    position: relative;
    padding-left: 36px;
    max-width: 740px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 28px;
}

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

.timeline-marker {
    position: absolute;
    left: -36px;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 2.5px solid var(--color-accent);
    z-index: 1;
}

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

.timeline-content {
    background: var(--color-bg-alt);
    padding: 22px 26px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(3px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 6px;
    gap: 12px;
}

.timeline-content h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-primary);
}

.company {
    font-size: 0.88rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-top: 1px;
}

.timeline-date {
    font-size: 0.8rem;
    color: var(--color-text-light);
    white-space: nowrap;
    flex-shrink: 0;
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(26,54,93,0.05);
    color: var(--color-primary);
    border-radius: 16px;
    font-size: 0.73rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.timeline-desc {
    font-size: 0.87rem;
    color: var(--color-text-light);
    line-height: 1.65;
}

/* ===== Education ===== */
.education { background: var(--color-bg-alt); }

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 740px;
    margin: 0 auto;
}

.edu-card {
    padding: 28px 26px;
    background: var(--color-bg);
    border-radius: 10px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.edu-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.edu-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: rgba(26,54,93,0.05);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.edu-icon svg {
    width: 28px;
    height: 28px;
}

.edu-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.edu-institution {
    font-size: 0.87rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 6px;
}

.edu-detail {
    font-size: 0.83rem;
    color: var(--color-text-light);
}

.edu-year {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 6px;
}

/* ===== Expertise ===== */
.expertise { background: var(--color-bg); }

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 960px;
    margin: 0 auto;
}

.expertise-card {
    padding: 26px 24px;
    background: var(--color-bg-alt);
    border-radius: 10px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.expertise-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.expertise-icon {
    width: 46px;
    height: 46px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(26,54,93,0.06), rgba(201,168,76,0.06));
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.expertise-icon svg {
    width: 24px;
    height: 24px;
}

.expertise-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.expertise-card p {
    font-size: 0.84rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ===== Contact ===== */
.contact {
    background: var(--color-primary);
    color: #fff;
    padding: 56px 0;
}

.contact .section-title {
    color: #fff;
}

.contact .section-title::after {
    background: var(--color-accent);
}

.contact-subtitle {
    text-align: center;
    color: rgba(255,255,255,0.65);
    margin-top: -24px;
    margin-bottom: 36px;
    font-size: 0.95rem;
}

.contact-cards {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: rgba(255,255,255,0.07);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 10px;
    color: #fff;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.contact-card svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

a.contact-card:hover {
    background: rgba(255,255,255,0.14);
    transform: translateY(-2px);
}

/* ===== Footer ===== */
.footer {
    background: #0f2440;
    color: rgba(255,255,255,0.45);
    padding: 18px 0;
    text-align: center;
    font-size: 0.8rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-toggle { display: flex; }

    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.active { display: flex; }

    .hero-content { flex-direction: column-reverse; text-align: center; gap: 32px; padding-top: 80px; }
    .hero-image-wrapper { width: 220px; height: 220px; }
    .hero-name { font-size: 2.4rem; }
    .hero-tagline { margin-left: auto; margin-right: auto; }
    .hero-cta { justify-content: center; flex-wrap: wrap; }

    .section { padding: 48px 0; }

    .about-content { grid-template-columns: 1fr; gap: 32px; }
    .education-grid { grid-template-columns: 1fr; }
    .expertise-grid { grid-template-columns: 1fr; }

    .timeline-header { flex-direction: column; }
    .contact-cards { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2rem; }
    .about-stats { grid-template-columns: 1fr; }
    .btn { padding: 10px 22px; font-size: 0.87rem; }
}