:root {
    --bg: #f7f3ea;
    --bg-soft: #fbf8f1;
    --card: rgba(255, 251, 245, 0.9);
    --line: rgba(91, 86, 76, 0.13);
    --text: #171717;
    --muted: #6a6a66;
    --primary: #146eb4;
    --primary-strong: #0e5a94;
    --accent: #188f6d;
    --warm: #d79c1a;
    --violet: #7b58c9;
    --shadow: 0 18px 48px rgba(18, 28, 41, 0.09);
    --shadow-strong: 0 28px 80px rgba(18, 28, 41, 0.12);
    --gradient: linear-gradient(135deg, #146eb4 0%, #1dba85 100%);
}

body.theme-dark {
    --bg: #0d0f1e;
    --bg-soft: #14172a;
    --card: rgba(20, 23, 42, 0.9);
    --line: rgba(255, 255, 255, 0.08);
    --text: #f5f2eb;
    --muted: #b4aea3;
    --primary: #4c9be0;
    --primary-strong: #2c7ec3;
    --accent: #32b287;
    --warm: #f0b449;
    --violet: #8d74d4;
    --shadow: 0 22px 56px rgba(0, 0, 0, 0.24);
    --shadow-strong: 0 30px 86px rgba(0, 0, 0, 0.34);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: "Space Grotesk", sans-serif;
    font-weight: 400;
    color: var(--text);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.4), rgba(255,255,255,0.08)),
        var(--bg);
}
body.theme-dark {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01)),
        var(--bg);
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
input, textarea, select { font: inherit; }
svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

.container { width: min(1120px, calc(100% - 2rem)); margin: 0 auto; }
.container.narrow { width: min(860px, calc(100% - 2rem)); }

.topbar {
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(18px);
    background: rgba(251, 248, 241, 0.94);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.topbar {
    box-shadow: var(--shadow);
}
.topbar,
.topbar.is-scrolled {
    background: rgba(251, 248, 241, 0.94);
    border-bottom-color: var(--line);
    box-shadow: var(--shadow);
}
body.theme-dark .topbar {
    background: rgba(13, 15, 30, 0.94);
}
body.theme-dark .topbar.is-scrolled {
    background: rgba(13, 15, 30, 0.94);
}
.nav-inner {
    min-height: 74px;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: space-between;
}
.hero-title,
.section-header h2,
.degree-badge strong,
.stat-card strong,
.subsection h3,
.interest-card h3,
.timeline-card h3,
.panel-card h3,
.skill-head h3 {
    font-family: "DM Serif Display", serif;
    font-weight: 400;
}
.brand {
    display: inline-flex;
    align-items: center;
    font-size: 1.12rem;
    letter-spacing: 0.02em;
}
.brand-mark {
    display: inline-block;
    color: var(--heading);
    font-family: "DM Serif Display", serif;
    font-size: clamp(1.45rem, 2vw, 1.8rem);
    font-weight: 400;
    line-height: 1;
    letter-spacing: 0.08em;
}
.brand-text {
    font-family: "Space Grotesk", sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
}
.nav-links, .nav-actions { display: flex; align-items: center; gap: 0.9rem; }
.nav-links a {
    color: var(--muted);
    font-size: 0.94rem;
    padding: 0.5rem 0.8rem;
    border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease;
}
.nav-links a:hover,
.nav-links a.is-active {
    color: var(--text);
    background: color-mix(in srgb, var(--primary) 10%, transparent);
}

.icon-button {
    width: 42px;
    height: 42px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--card) 78%, transparent);
    color: var(--text);
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.icon-button:hover {
    transform: translateY(-1px);
    border-color: color-mix(in srgb, var(--primary) 36%, var(--line));
}
.icon-button svg { width: 18px; height: 18px; }
.nav-menu-button { display: none; }
.theme-icon { position: absolute; transition: opacity 0.2s ease, transform 0.2s ease; }
.theme-toggle { position: relative; }
body.theme-dark .theme-icon-sun,
body:not(.theme-dark) .theme-icon-moon {
    opacity: 0;
    transform: scale(0.8);
}
body.theme-dark .theme-icon-moon,
body:not(.theme-dark) .theme-icon-sun {
    opacity: 1;
    transform: scale(1);
}

.lang-dropdown { position: relative; }
.dropdown-menu {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 0;
    min-width: 160px;
    display: grid;
    gap: 0.25rem;
    padding: 0.45rem;
    border-radius: 1rem;
    background: color-mix(in srgb, var(--bg-soft) 92%, transparent);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.18s ease, transform 0.18s ease;
}
.lang-dropdown.is-open .dropdown-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
.dropdown-link {
    padding: 0.7rem 0.85rem;
    border-radius: 0.8rem;
    color: var(--muted);
    font-size: 0.92rem;
}
.dropdown-link:hover,
.dropdown-link.is-active {
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    color: var(--text);
}

.mobile-nav {
    display: none;
    width: 100%;
    padding: 0 0 1rem;
    gap: 0.55rem;
}
.mobile-nav a {
    display: block;
    padding: 0.9rem 1rem;
    border-radius: 1rem;
    background: color-mix(in srgb, var(--card) 82%, transparent);
    border: 1px solid var(--line);
    color: var(--muted);
}
.mobile-nav.is-open { display: grid; }

.hero-section {
    min-height: calc(100vh - 74px);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}
.hero-backdrop {
    position: absolute;
    inset: 0;
    opacity: 0.38;
    background-image:
        radial-gradient(circle at 12% 18%, color-mix(in srgb, var(--primary) 10%, transparent) 0 10%, transparent 38%),
        radial-gradient(circle at 88% 16%, color-mix(in srgb, var(--accent) 10%, transparent) 0 10%, transparent 34%),
        linear-gradient(transparent 95%, rgba(0, 0, 0, 0.04) 95%),
        linear-gradient(90deg, transparent 95%, rgba(0, 0, 0, 0.04) 95%);
    background-size: auto, auto, 24px 24px, 24px 24px;
}
body.theme-dark .hero-backdrop {
    background-image:
        radial-gradient(circle at 12% 18%, rgba(76, 155, 224, 0.1) 0 10%, transparent 38%),
        radial-gradient(circle at 88% 16%, rgba(50, 178, 135, 0.1) 0 10%, transparent 34%),
        linear-gradient(transparent 95%, rgba(255, 255, 255, 0.03) 95%),
        linear-gradient(90deg, transparent 95%, rgba(255, 255, 255, 0.03) 95%);
}
.hero-grid {
    position: relative;
    z-index: 1;
    padding: 4.5rem 0 3rem;
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 3rem;
    align-items: center;
}
.pill {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.62rem 1rem;
    border-radius: 999px;
    border: 1px solid color-mix(in srgb, var(--accent) 36%, transparent);
    background: color-mix(in srgb, var(--accent) 9%, transparent);
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}
.pill::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 6px color-mix(in srgb, currentColor 18%, transparent);
}
.hero-title {
    font-size: clamp(3rem, 7vw, 5.7rem);
    line-height: 0.92;
    margin: 1rem 0 1.2rem;
}
.hero-title span { color: var(--primary); }
.hero-location, .hero-summary, .section-header p, .interest-card p { color: var(--muted); }
.hero-location { font-size: 0.98rem; margin-bottom: 1.35rem; }
.hero-summary { max-width: 42rem; line-height: 1.8; }
.hero-actions {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.btn {
    padding: 0.98rem 1.38rem;
    border-radius: 1rem;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
    color: white;
    background: var(--gradient);
    box-shadow: 0 14px 34px color-mix(in srgb, var(--primary) 26%, transparent);
}
.btn-secondary {
    border: 1px solid var(--line);
    background: color-mix(in srgb, var(--card) 76%, transparent);
}

.stats-grid, .about-facts {
    display: grid;
    gap: 1rem;
}
.stats-grid {
    margin-top: 2rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.about-facts {
    margin-top: 1rem;
    grid-template-columns: repeat(3, minmax(0, 1fr));
}
.stat-card, .fact-card, .panel-card, .mini-card, .project-row, .contact-card, .timeline-card, .interest-card, .skill-card {
    border: 1px solid var(--line);
    background: var(--card);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
}
.stat-card, .fact-card {
    border-radius: 1.25rem;
    padding: 1rem 1.05rem;
}
.stat-card strong { display: block; font-size: 1.8rem; color: var(--primary); }
.stat-card span, .fact-card span { color: var(--muted); font-size: 0.84rem; }
.fact-card strong { display: block; margin-top: 0.35rem; font-size: 1rem; }

.hero-media { position: relative; }
.hero-media {
    transform: translateY(-115px);
}
.image-stack {
    position: relative;
    min-height: 460px;
    width: min(100%, 360px);
    margin-left: auto;
    border-radius: 2rem;
    overflow: hidden;
    border: 1px solid var(--line);
    background: #10151d;
    box-shadow: var(--shadow-strong);
}
body.theme-dark .image-stack {
    background: #12162b;
    box-shadow:
        0 0 0 1px rgba(76, 155, 224, 0.18),
        0 0 34px rgba(76, 155, 224, 0.18),
        0 0 74px rgba(76, 155, 224, 0.14),
        var(--shadow-strong);
}
.image-stack::before {
    content: "";
    position: absolute;
    inset: -18px;
    border-radius: 2.5rem;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.25s ease;
}
body.theme-dark .image-stack::before {
    opacity: 1;
    background: radial-gradient(circle at center, rgba(76, 155, 224, 0.22) 0%, rgba(76, 155, 224, 0.08) 36%, transparent 68%);
    filter: blur(16px);
}
.hero-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.9s ease;
}
.hero-image.is-active { opacity: 1; }
.degree-badge {
    position: absolute;
    right: 0;
    bottom: -1rem;
    border-radius: 1.2rem;
    padding: 1rem 1.1rem;
    background: color-mix(in srgb, var(--bg-soft) 92%, transparent);
    border: 1px solid var(--line);
    box-shadow: var(--shadow);
}
.degree-badge span { display: block; color: var(--muted); font-size: 0.8rem; }
.degree-badge strong { display: block; margin-top: 0.2rem; }

.section { padding: 6rem 0; }
.section-card {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.18) 0%, transparent 100%);
}
body.theme-dark .section-card {
    background:
        linear-gradient(180deg, rgba(255,255,255,0.03) 0%, transparent 100%);
}
.section-header {
    margin-bottom: 2rem;
    text-align: center;
}
.section-header h2 {
    margin: 0 0 0.75rem;
    font-size: clamp(2.2rem, 4vw, 3.4rem);
}
.section-header p {
    width: min(760px, 100%);
    margin: 0 auto;
    line-height: 1.7;
}

.skills-grid, .interest-grid, .grid-two, .contact-grid {
    display: grid;
    gap: 1.25rem;
}
.skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
}
.interest-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.contact-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.skill-card {
    border-radius: 1.55rem;
    position: relative;
    overflow: hidden;
    align-self: start;
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 24px 46px color-mix(in srgb, hsl(var(--accent)) 16%, transparent);
}
.skill-card::before,
.interest-card::before,
.timeline-card::before {
    content: "";
    position: absolute;
    inset: 0 auto 0 0;
    width: 5px;
    border-radius: inherit;
    background: hsl(var(--accent));
}
.skill-toggle {
    width: 100%;
    display: block;
    padding: 1.4rem;
    text-align: left;
    border: 0;
    background: transparent;
    color: inherit;
    cursor: pointer;
}
.skill-head {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: flex-start;
}
.skill-head h3, .interest-card h3, .timeline-card h3, .panel-card h3 { margin: 0; font-size: 1.15rem; }
.skill-head p {
    margin: 0.45rem 0 0;
    color: var(--muted);
    line-height: 1.6;
    font-size: 0.92rem;
}
.skill-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    color: hsl(var(--accent));
    flex-shrink: 0;
}
.skill-chevron {
    width: 18px;
    height: 18px;
    transition: transform 0.24s ease;
}
.skill-card.is-open .skill-chevron { transform: rotate(180deg); }
.progress {
    margin: 1rem 0;
    height: 8px;
    border-radius: 999px;
    background: color-mix(in srgb, var(--text) 8%, transparent);
    overflow: hidden;
}
.progress span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: hsl(var(--accent));
}
.chips {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.chips span {
    padding: 0.38rem 0.75rem;
    border-radius: 999px;
    background: color-mix(in srgb, hsl(var(--accent)) 10%, transparent);
    color: hsl(var(--accent));
    font-size: 0.78rem;
}
.skill-panel {
    padding: 0 1.4rem 1.4rem;
    border-top: 1px solid color-mix(in srgb, hsl(var(--accent)) 18%, transparent);
    background: color-mix(in srgb, hsl(var(--accent)) 4%, transparent);
    animation: skillPanelIn 0.22s ease;
}
.skill-panel[hidden] {
    display: none;
}
.sample-list { display: grid; gap: 0.75rem; }
.sample-item {
    padding: 0.9rem;
    border-radius: 1rem;
    background: color-mix(in srgb, hsl(var(--accent)) 6%, transparent);
    border: 1px solid color-mix(in srgb, hsl(var(--accent)) 18%, transparent);
}
.sample-item strong { display: block; margin-bottom: 0.35rem; }
.sample-item p { margin: 0; color: var(--muted); font-size: 0.92rem; line-height: 1.6; }

@keyframes skillPanelIn {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.timeline { display: grid; gap: 1.25rem; }
.timeline-card {
    position: relative;
    border-radius: 1.4rem;
    padding: 1.4rem 1.4rem 1.4rem 1.8rem;
}
.timeline-meta {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--muted);
    font-size: 0.84rem;
    margin-bottom: 0.7rem;
}
.timeline-card h4 {
    margin: 0.25rem 0 1rem;
    color: hsl(var(--accent));
    font-size: 0.95rem;
}
.timeline-card ul { margin: 0; padding-left: 1rem; color: var(--muted); line-height: 1.7; }

.panel-card, .mini-card, .project-row, .interest-card, .contact-card {
    border-radius: 1.4rem;
    padding: 1.3rem;
}
.eyebrow { color: var(--primary); text-transform: uppercase; letter-spacing: 0.08em; font-size: 0.74rem; font-weight: 700; }
.panel-strong { font-weight: 700; }
.subsection { margin-top: 2.3rem; }
.subsection h3 {
    margin: 0 0 1rem;
    font-size: 1.8rem;
}
.mini-card { display: grid; gap: 0.35rem; }
.mini-card span { color: var(--muted); font-size: 0.92rem; }
.project-list { display: grid; gap: 0.8rem; }
.project-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    align-items: start;
    gap: 1rem;
}
.project-row span {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    border-radius: 999px;
    padding: 0.55rem 0.7rem;
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    color: var(--primary);
    font-weight: 700;
    font-size: 0.82rem;
}
.project-row p { margin: 0; color: var(--muted); line-height: 1.7; }

.interest-card { position: relative; }
.interest-card h3 { margin-bottom: 0.8rem; }
.interest-card p { margin: 0; line-height: 1.8; }

.contact-card {
    display: grid;
    gap: 0.4rem;
    text-align: center;
    justify-items: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-strong);
}
.contact-icon {
    width: 3rem;
    height: 3rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
    margin-bottom: 0.3rem;
    background: color-mix(in srgb, var(--primary) 10%, transparent);
    color: var(--primary);
}
.contact-icon svg {
    width: 1.2rem;
    height: 1.2rem;
}
.contact-card span { color: var(--muted); text-transform: uppercase; font-size: 0.75rem; letter-spacing: 0.08em; }
.footer-note {
    margin-top: 2rem;
    padding-top: 1.4rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    text-align: center;
    font-size: 0.9rem;
}

@media (max-width: 980px) {
    .hero-grid,
    .skills-grid,
    .interest-grid,
    .grid-two,
    .contact-grid,
    .stats-grid,
    .about-facts {
        grid-template-columns: 1fr;
    }
    .nav-links { display: none; }
    .nav-menu-button { display: inline-flex; }
    .hero-media { order: -1; }
    .image-stack { min-height: 380px; }
    .hero-media { transform: translateY(0); }
}

@media (max-width: 640px) {
    .nav-inner {
        padding: 0.9rem 0;
    }
    .nav-actions { margin-left: auto; }
    .brand-text { display: none; }
    .hero-section { min-height: auto; }
    .hero-grid { padding-top: 2rem; }
    .project-row { grid-template-columns: 1fr; }
    .degree-badge {
        position: static;
        margin-top: 1rem;
    }
}