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

:root {
    --bg: #f5f0e8;
    --white: #ffffff;
    --black: #000000;
    --yellow: #ffd43b;
    --pink: #ff6b9d;
    --blue: #4dabf7;
    --green: #51cf66;
    --orange: #ff922b;
    --purple: #cc5de8;

    --border: 3px solid #000;
    --border-thick: 5px solid #000;
    --shadow-sm: 3px 3px 0 #000;
    --shadow: 5px 5px 0 #000;
    --shadow-lg: 8px 8px 0 #000;

    --radius: 4px;
    --font: 'Space Grotesk', 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --container: 1100px;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--black);
    line-height: 1.6;
    font-weight: 500;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==================== HEADER ==================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--yellow);
    border-bottom: var(--border-thick);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.logo {
    font-family: var(--font);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--black);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.logo .accent {
    background: var(--black);
    color: var(--yellow);
    padding: 0 4px;
    border-radius: 2px;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
    list-style: none;
}

.nav-links a {
    color: var(--black);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border: 2px solid transparent;
    border-radius: var(--radius);
    transition: transform 0.1s, box-shadow 0.1s, border-color 0.1s;
}

.nav-links a:hover {
    border-color: var(--black);
    box-shadow: var(--shadow-sm);
    transform: translate(-2px, -2px);
}

/* ==================== HERO ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    border-bottom: var(--border-thick);
    background: var(--white);
}

.hero-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-text {
    flex: 1;
}

.hero-avatar {
    flex-shrink: 0;
}

.avatar-img {
    width: 280px;
    height: 280px;
    object-fit: cover;
    border-radius: 8px;
    border: var(--border-thick);
    box-shadow: var(--shadow-lg);
    display: block;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    display: inline-block;
    background: var(--yellow);
    border: var(--border);
    border-radius: var(--radius);
    padding: 0.25rem 0.75rem;
    box-shadow: var(--shadow-sm);
}

.hero-title {
    font-size: clamp(3rem, 9vw, 6rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.0;
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.75rem;
    border-left: var(--border-thick);
    padding-left: 1rem;
    color: #333;
}

.hero-desc {
    color: #333;
    font-size: 1.05rem;
    font-weight: 500;
    max-width: 520px;
    margin-bottom: 2.5rem;
    line-height: 1.75;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 700;
    font-family: var(--font);
    text-decoration: none;
    cursor: pointer;
    border: var(--border);
    transition: transform 0.1s, box-shadow 0.1s;
    box-shadow: var(--shadow);
}

.btn:hover {
    transform: translate(-3px, -3px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translate(3px, 3px);
    box-shadow: none;
}

.btn-primary {
    background: var(--yellow);
    color: var(--black);
}

.btn-secondary {
    background: var(--white);
    color: var(--black);
}

.btn .icon {
    width: 18px;
    height: 18px;
}

/* ==================== SECTIONS ==================== */
.section {
    padding: 6rem 0;
    border-bottom: var(--border-thick);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 3rem;
    display: inline-block;
    background: var(--yellow);
    border: var(--border);
    border-radius: var(--radius);
    padding: 0.25rem 1rem;
    box-shadow: var(--shadow-sm);
}

.section-subtitle {
    color: #555;
    margin-top: -2rem;
    margin-bottom: 2rem;
}

/* ==================== ABOUT ==================== */
.about {
    background: var(--bg);
}

.about-content {
    max-width: 700px;
}

.about-content p {
    color: #222;
    margin-bottom: 1rem;
    font-size: 1.05rem;
    line-height: 1.8;
}

.about-content strong {
    color: var(--black);
    background: var(--yellow);
    padding: 0 3px;
}

/* ==================== SKILLS ==================== */
.skills {
    background: var(--white);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.1s, box-shadow 0.1s;
}

.skill-card:hover {
    transform: translate(-3px, -3px);
    box-shadow: var(--shadow-lg);
}

.skill-category {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
    background: var(--black);
    color: var(--yellow);
    padding: 0.2rem 0.6rem;
    border-radius: 2px;
    display: inline-block;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 2px solid var(--black);
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--black);
}

.skill-level::before { content: ''; }
.level-5::before { content: '●●●●●'; color: var(--black); letter-spacing: 3px; font-size: 8px; }
.level-4::before { content: '●●●●○'; color: var(--black); letter-spacing: 3px; font-size: 8px; }
.level-3::before { content: '●●●○○'; color: var(--black); letter-spacing: 3px; font-size: 8px; }

/* ==================== PROJECTS ==================== */
.projects {
    background: var(--bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    box-shadow: var(--shadow);
    transition: transform 0.1s, box-shadow 0.1s;
}

.project-card:hover {
    transform: translate(-4px, -4px);
    box-shadow: var(--shadow-lg);
}

.project-card.featured {
    border-width: 4px;
    background: #fffef0;
}

.project-card.featured::before {
    content: '★ FEATURED';
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--black);
    background: var(--yellow);
    border: 2px solid var(--black);
    border-radius: 2px;
    padding: 0.15rem 0.5rem;
    margin-bottom: 1rem;
    width: fit-content;
    box-shadow: 2px 2px 0 #000;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.project-icon {
    font-size: 1.75rem;
}

.project-meta {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-stars {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--black);
}

.project-lang {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 2px;
    border: 2px solid var(--black);
    font-family: var(--font-mono);
    box-shadow: 1px 1px 0 #000;
}

.lang-java   { background: #ffd43b; color: #000; }
.lang-ts     { background: #4dabf7; color: #000; }
.lang-kotlin { background: #cc5de8; color: #fff; }

.project-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.project-card h3 a {
    color: var(--black);
    text-decoration: none;
}

.project-card h3 a:hover {
    text-decoration: underline;
    text-decoration-thickness: 3px;
}

.project-card p {
    color: #444;
    font-size: 0.9rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 1rem;
}

.tag {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.2rem 0.55rem;
    border-radius: 2px;
    background: var(--bg);
    color: var(--black);
    border: 2px solid var(--black);
    font-family: var(--font-mono);
    box-shadow: 1px 1px 0 #000;
}

/* ==================== CONTACT ==================== */
.contact {
    background: var(--white);
}

.contact-desc {
    color: #333;
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 420px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background: var(--white);
    border: var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    box-shadow: var(--shadow);
    transition: transform 0.1s, box-shadow 0.1s;
}

.contact-item:hover {
    transform: translate(-3px, -3px);
    box-shadow: var(--shadow-lg);
}

.contact-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.25rem;
    color: #555;
}

.contact-value {
    color: var(--black);
    font-weight: 700;
    font-size: 1rem;
}

/* ==================== FOOTER ==================== */
.footer {
    padding: 2rem 0;
    background: var(--black);
    text-align: center;
}

.footer p {
    color: var(--yellow);
    font-size: 0.875rem;
    font-weight: 700;
    font-family: var(--font-mono);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-inner {
        flex-direction: column-reverse;
        gap: 2rem;
    }

    .avatar-img {
        width: 160px;
        height: 160px;
    }

    .hero-subtitle {
        border-left: var(--border-thick);
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn:hover, .btn:active,
    .skill-card:hover,
    .project-card:hover,
    .contact-item:hover,
    .nav-links a:hover {
        transform: none;
    }
}