:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --surface-2: #eef2f7;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #dbe3ee;
    --primary: #2563eb;
    --primary-soft: #dbeafe;
    --shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
    --radius: 16px;
    --radius-sm: 12px;
    --max-width: 1150px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

.container {
    width: min(92%, var(--max-width));
    margin: 0 auto;
}

.section {
    padding: 72px 0;
}

.section-header {
    margin-bottom: 28px;
}

    .section-header h2 {
        font-size: 2rem;
        margin-bottom: 8px;
    }

    .section-header p {
        color: var(--muted);
        max-width: 720px;
    }

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 700;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(245, 247, 251, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 72px;
    gap: 16px;
}

.brand {
    font-size: 1.1rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
    flex-wrap: wrap;
}

    .nav-links a {
        color: var(--muted);
        font-weight: 600;
        transition: 0.2s ease;
    }

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

/* Hero / About */
.hero {
    padding: 64px 0 36px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.9fr;
    gap: 28px;
    align-items: stretch;
}

.hero-content,
.hero-photo {
    padding: 28px;
}

    .hero-content h1 {
        font-size: clamp(2.2rem, 5vw, 3.5rem);
        line-height: 1.1;
        margin: 14px 0 16px;
    }

    .hero-content p {
        color: var(--muted);
        font-size: 1rem;
        margin-bottom: 18px;
        max-width: 700px;
    }

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

    .hero-meta span {
        padding: 10px 14px;
        border-radius: 999px;
        background: var(--surface-2);
        color: var(--text);
        font-size: 0.95rem;
        border: 1px solid var(--border);
    }

.photo-placeholder {
    width: 100%;
    min-height: 360px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    display: grid;
    place-items: center;
    background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    color: var(--muted);
    text-align: center;
    padding: 20px;
}

/* Education */
.education-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.education-item {
    display: flex;
    gap: 16px;
    padding: 20px;
}

.edu-icon {
    width: 64px;
    height: 64px;
    flex-shrink: 0;
    border-radius: 14px;
    border: 2px dashed var(--border);
    display: grid;
    place-items: center;
    color: var(--muted);
    background: var(--surface-2);
    font-size: 0.85rem;
    text-align: center;
    padding: 8px;
}

.education-item h3 {
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.education-item .school {
    color: var(--primary);
    font-weight: 700;
}

.education-item .period,
.education-item .details {
    color: var(--muted);
    font-size: 0.95rem;
}

/* Experience */
.experience-list {
    display: grid;
    gap: 18px;
}

.experience-item {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 20px;
    padding: 22px;
    align-items: start;
}

.experience-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    border-radius: 14px;
    border: 2px dashed var(--border);
    background: var(--surface-2);
    display: grid;
    place-items: center;
    color: var(--muted);
    text-align: center;
    padding: 10px;
    font-size: 0.9rem;
}

.experience-top {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}

    .experience-top h3 {
        font-size: 1.15rem;
    }

.experience-company {
    color: var(--primary);
    font-weight: 700;
}

.experience-time,
.experience-location {
    color: var(--muted);
    font-size: 0.95rem;
}

.experience-description,
.experience-points {
    color: var(--muted);
}

.experience-points {
    margin-top: 12px;
    padding-left: 18px;
}

    .experience-points li + li {
        margin-top: 6px;
    }

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.skill-item {
    padding: 20px;
}

.skill-top {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.skill-icon {
    width: 58px;
    height: 58px;
    border-radius: 14px;
    border: 2px dashed var(--border);
    background: var(--surface-2);
    display: grid;
    place-items: center;
    color: var(--muted);
    font-size: 0.8rem;
    text-align: center;
    padding: 6px;
    flex-shrink: 0;
}

.skill-item h3 {
    font-size: 1rem;
}

.skill-category,
.skill-description {
    color: var(--muted);
    font-size: 0.95rem;
}

.skill-bar {
    width: 100%;
    height: 10px;
    background: var(--surface-2);
    border-radius: 999px;
    overflow: hidden;
    margin: 14px 0 8px;
    border: 1px solid var(--border);
}

.skill-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 999px;
}

.skill-level {
    font-size: 0.9rem;
    color: var(--muted);
    font-weight: 700;
}

/* Projects */
.project-controls {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 22px;
}

    .project-controls input,
    .project-controls select {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 12px 14px;
        font-size: 0.95rem;
        color: var(--text);
        min-width: 210px;
        outline: none;
    }

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.project-card {
    overflow: hidden;
}

.project-image {
    width: 100%;
    height: 200px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, #eff6ff 0%, #dbeafe 100%);
    display: grid;
    place-items: center;
    color: var(--muted);
    text-align: center;
    padding: 16px;
    font-size: 0.95rem;
}

.project-body {
    padding: 20px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 12px 0 14px;
}

    .project-tags span {
        font-size: 0.85rem;
        padding: 6px 10px;
        border-radius: 999px;
        background: var(--surface-2);
        color: var(--muted);
        border: 1px solid var(--border);
    }

.project-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 14px;
}

.project-link {
    padding: 10px 14px;
    border-radius: 10px;
    border: 1px solid var(--border);
    font-weight: 700;
    transition: 0.2s ease;
}

    .project-link:hover {
        border-color: var(--primary);
        color: var(--primary);
    }

.empty-state {
    display: none;
    padding: 18px;
    border: 1px dashed var(--border);
    border-radius: 14px;
    color: var(--muted);
    background: var(--surface);
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.contact-item {
    padding: 20px;
}

    .contact-item h3 {
        font-size: 1rem;
        margin-bottom: 8px;
    }

    .contact-item p,
    .contact-item a {
        color: var(--muted);
        word-break: break-word;
    }

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 26px 0 40px;
    color: var(--muted);
    font-size: 0.95rem;
    text-align: center;
}

/* Responsive */
@media (max-width: 980px) {
    .hero-grid,
    .skills-grid,
    .projects-grid,
    .contact-grid,
    .education-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .experience-item {
        grid-template-columns: 1fr;
    }

    .nav {
        flex-direction: column;
        justify-content: center;
        padding: 14px 0;
    }

    .nav-links {
        justify-content: center;
    }

    .hero-content,
    .hero-photo {
        padding: 22px;
    }

    .section {
        padding: 56px 0;
    }
}