:root {
    --bg: #f6f8fc;
    --bg-alt: #ffffff;
    --text: #0f172a;
    --muted: #475569;
    --line: #dce3f1;
    --brand: #0f766e;
    --brand-soft: #ccfbf1;
    --accent: #d97706;
    --impact: #7c3aed;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
}

html[data-theme='dark'] {
    --bg: #0b1020;
    --bg-alt: #121a2e;
    --text: #e2e8f0;
    --muted: #9fb0c7;
    --line: #2a3858;
    --brand: #2dd4bf;
    --brand-soft: #153337;
    --accent: #f59e0b;
    --impact: #a78bfa;
    --shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 62.5%; scroll-behavior: smooth; }
body {
    font-family: 'Red Hat Display', sans-serif;
    background: linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--bg) 82%, #cbd5e1 18%) 100%);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.45s ease, color 0.45s ease;
}

.header, .navbar, .panel, .kpi, .project, .chip-group, .contact-card, .contact-form, .hero-card, .theme-fab, .btn-secondary, .quick-links a {
    transition: background-color 0.45s ease, color 0.45s ease, border-color 0.45s ease, box-shadow 0.45s ease;
}

.bg-orb { position: fixed; width: 42rem; height: 42rem; border-radius: 50%; filter: blur(80px); z-index: -1; opacity: 0.35; }
.orb-1 { top: -15rem; left: -12rem; background: #7dd3fc; }
.orb-2 { right: -10rem; bottom: -16rem; background: #fdba74; }

.section { width: min(1180px, 92%); margin: 0 auto; padding: 9rem 0; }

.header {
    position: sticky; top: 0; z-index: 50; display: flex; justify-content: space-between; align-items: center;
    width: min(1180px, 92%); margin: 2rem auto 0; padding: 1.2rem 1.8rem; border-radius: 2rem;
    background: color-mix(in srgb, var(--bg-alt) 90%, transparent 10%);
    backdrop-filter: blur(12px); border: 1px solid var(--line);
}

.logo { font-weight: 800; font-size: 2rem; color: var(--text); text-decoration: none; letter-spacing: 0.03em; }
.menu-btn {
    border: 1px solid var(--line); background: var(--bg-alt); color: var(--text);
    width: 3.8rem; height: 3.8rem; border-radius: 999px; font-size: 2rem;
    display: none; align-items: center; justify-content: center; cursor: pointer;
}

.navbar { display: flex; gap: 2rem; }
.navbar a { text-decoration: none; color: var(--muted); font-size: 1.5rem; font-weight: 500; transition: color 0.2s ease; }
.navbar a:hover, .navbar a.active { color: var(--text); }

.theme-fab {
    position: fixed;
    right: 2.2rem;
    bottom: 2.2rem;
    z-index: 60;
    border: 1px solid var(--line);
    background: var(--bg-alt);
    color: var(--text);
    width: 4.4rem;
    height: 4.4rem;
    border-radius: 999px;
    font-size: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.hero { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 3rem; align-items: start; padding-top: 7rem; }
.eyebrow { font-size: 1.3rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--brand); font-weight: 700; }
.java-role { color: var(--accent); margin-top: 0.5rem; }
.hero h1 { margin-top: 1.2rem; font-size: clamp(3.4rem, 5.4vw, 6.2rem); line-height: 1.07; font-family: 'DM Serif Display', serif; font-weight: 400; }
.hero p { margin-top: 2rem; color: var(--muted); font-size: 1.9rem; max-width: 62ch; }
.impact-accent { color: var(--accent); }
.impact-word { color: var(--impact); font-weight: 700; }

.hero-actions { margin-top: 2.6rem; display: flex; gap: 1.2rem; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; justify-content: center; padding: 1.1rem 2rem; border-radius: 999px;
    text-decoration: none; border: 1px solid transparent; font-size: 1.5rem; font-weight: 600; cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: linear-gradient(135deg, var(--brand), #14b8a6); color: #ecfeff; box-shadow: 0 12px 30px rgba(20, 184, 166, 0.3); }
.btn-secondary { border-color: var(--line); background: var(--bg-alt); color: var(--text); }

.typed-line {
    margin-top: 2rem;
    font-size: 1.8rem;
    color: var(--muted);
}

.multiple-text {
    color: var(--brand);
    font-weight: 700;
}

.hero-card { background: color-mix(in srgb, var(--bg-alt) 88%, transparent 12%); border: 1px solid var(--line); border-radius: 2.4rem; padding: 1.4rem; box-shadow: var(--shadow); }
.profile-photo { width: 100%; height: 30rem; object-fit: cover; border-radius: 1.5rem; }
.hero-card h3 { font-size: 2.3rem; margin-top: 1rem; }
.hero-card p { margin-top: 0.5rem; font-size: 1.5rem; color: var(--muted); }
.hero-card ul { list-style: none; margin-top: 1.4rem; display: grid; gap: 0.9rem; }
.hero-card li { font-size: 1.45rem; color: var(--muted); display: flex; align-items: center; gap: 0.7rem; }
.quick-links { margin-top: 1.5rem; display: flex; gap: 0.8rem; flex-wrap: wrap; }
.quick-links a { text-decoration: none; color: var(--text); border: 1px solid var(--line); border-radius: 999px; padding: 0.7rem 1rem; font-size: 1.35rem; }

.section-head h2 { margin-top: 1rem; font-size: clamp(2.8rem, 4.4vw, 4.8rem); line-height: 1.14; font-family: 'DM Serif Display', serif; font-weight: 400; }
.about-grid,.kpi-grid,.project-grid,.chip-groups,.contact-layout { margin-top: 2.6rem; display: grid; gap: 1.5rem; }
.about-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kpi-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.project-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.chip-groups { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.contact-layout { grid-template-columns: 0.9fr 1.1fr; }

.panel,.kpi,.project,.chip-group,.contact-card,.contact-form {
    background: color-mix(in srgb, var(--bg-alt) 88%, transparent 12%); border: 1px solid var(--line); border-radius: 1.8rem; padding: 2rem; box-shadow: var(--shadow);
}

.panel h3,.project h3,.chip-group h3 { font-size: 2rem; }
.panel p,.project p,.chip-group p,.contact-card p { margin-top: 0.9rem; color: var(--muted); font-size: 1.55rem; }
.kpi h3 { font-size: 3rem; color: var(--brand); }
.kpi p { margin-top: 0.6rem; color: var(--muted); font-size: 1.45rem; }
.project .stack { margin-top: 0.55rem; color: var(--text); font-weight: 600; font-size: 1.35rem; }

.chip-group p { display: inline-flex; margin-right: 0.7rem; margin-top: 0.9rem; padding: 0.5rem 0.9rem; background: var(--brand-soft); border-radius: 999px; color: var(--brand); font-size: 1.35rem; }
.contact-links { margin-top: 1.2rem; display: grid; gap: 0.8rem; }
.contact-links a { text-decoration: none; color: var(--muted); font-size: 1.5rem; display: inline-flex; align-items: center; gap: 0.7rem; }

.contact-form { display: grid; gap: 1rem; }
.contact-form label { font-size: 1.4rem; color: var(--muted); display: grid; gap: 0.5rem; }
.contact-form input,.contact-form textarea { width: 100%; padding: 1.05rem 1.1rem; border-radius: 1.2rem; border: 1px solid var(--line); background: var(--bg-alt); font-family: inherit; font-size: 1.5rem; color: var(--text); }

.form-status { min-height: 2rem; font-size: 1.35rem; color: var(--muted); }
.form-status.success { color: #15803d; }
.form-status.error { color: #b91c1c; }

.footer { width: min(1180px, 92%); margin: 0 auto 2rem; padding: 2.2rem 0; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; }
.footer p { color: var(--muted); font-size: 1.4rem; }
.to-top { width: 3.6rem; height: 3.6rem; display: grid; place-items: center; border-radius: 999px; background: var(--brand); color: #ecfeff; text-decoration: none; font-size: 2rem; }

.reveal { opacity: 0; transform: translateY(12px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1100px) {
    .hero { grid-template-columns: 1fr; }
    .about-grid,.chip-groups,.kpi-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .contact-layout,.project-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
    .menu-btn { display: inline-flex; }
    .navbar {
        position: absolute; top: calc(100% + 1rem); left: 0; right: 0; flex-direction: column; gap: 1rem;
        padding: 1.3rem; border-radius: 1.4rem; border: 1px solid var(--line);
        background: color-mix(in srgb, var(--bg-alt) 95%, transparent 5%); box-shadow: var(--shadow); display: none;
    }
    .navbar.active { display: flex; }
    .hero { padding-top: 4rem; }
}

@media (max-width: 620px) {
    html { font-size: 56%; }
    .about-grid,.chip-groups,.kpi-grid,.project-grid { grid-template-columns: 1fr; }
    .footer { flex-direction: column; gap: 1rem; }
}
.impact-layout {
    margin-top: 2.6rem;
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: 1.5rem;
}

.impact-feature {
    background: linear-gradient(145deg, color-mix(in srgb, var(--brand-soft) 68%, var(--bg-alt) 32%), color-mix(in srgb, var(--bg-alt) 86%, transparent 14%));
    border: 1px solid var(--line);
    border-radius: 2rem;
    padding: 2.2rem;
    box-shadow: var(--shadow);
}

.feature-label {
    font-size: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--brand);
    font-weight: 700;
}

.impact-feature h3 {
    margin-top: 1rem;
    font-size: 2.7rem;
    line-height: 1.2;
    font-family: 'DM Serif Display', serif;
}

.impact-feature p {
    margin-top: 1rem;
    font-size: 1.55rem;
    color: var(--muted);
}

.feature-tags {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.feature-tags span {
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--bg-alt) 84%, transparent 16%);
    color: var(--text);
    border-radius: 999px;
    padding: 0.6rem 1rem;
    font-size: 1.25rem;
}

.modern-kpi {
    margin-top: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.modern-kpi .kpi {
    border-radius: 1.6rem;
    background: color-mix(in srgb, var(--bg-alt) 90%, transparent 10%);
}

.project-showcase {
    margin-top: 2.6rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.project-feature {
    position: relative;
    overflow: hidden;
    border-radius: 2rem;
    background: linear-gradient(120deg, color-mix(in srgb, var(--impact) 14%, var(--bg-alt) 86%), color-mix(in srgb, var(--brand) 12%, var(--bg-alt) 88%));
    border: 1px solid color-mix(in srgb, var(--impact) 35%, var(--line) 65%);
}

.project-badge {
    display: inline-flex;
    padding: 0.45rem 0.9rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--impact) 20%, var(--bg-alt) 80%);
    color: var(--impact);
    font-size: 1.2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.project-outcome {
    margin-top: 1.2rem;
    padding-top: 1.1rem;
    border-top: 1px dashed color-mix(in srgb, var(--line) 70%, var(--impact) 30%);
    color: var(--text);
    font-weight: 700;
    font-size: 1.4rem;
}

.project {
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.project:hover {
    transform: translateY(-4px);
    border-color: color-mix(in srgb, var(--brand) 45%, var(--line) 55%);
}

@media (max-width: 1100px) {
    .impact-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .modern-kpi {
        grid-template-columns: 1fr;
    }
}