:root {
    --font-base: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #0f172a;
    --color-muted: #475569;
    --color-subtle: #94a3b8;
    --color-accent: #2b59ff;
    --color-accent-soft: rgba(43, 89, 255, 0.08);
    --color-border: rgba(15, 23, 42, 0.08);
    --shadow-card: 0 20px 45px -30px rgba(15, 23, 42, 0.45);
    --radius-base: 18px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
}

.header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 20px clamp(24px, 6vw, 64px);
    background: rgba(248, 250, 252, 0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header--compressed {
    padding-top: 14px;
    padding-bottom: 14px;
    background: rgba(248, 250, 252, 0.98);
    box-shadow: 0 12px 24px -24px rgba(15, 23, 42, 0.4);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
}

.header-actions .btn {
    white-space: nowrap;
}

.branding {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
}

.label {
    font-weight: 600;
    letter-spacing: 0.02em;
}

.sub-label {
    font-size: 0.85rem;
    color: var(--color-subtle);
}

nav {
    display: flex;
    gap: 20px;
}

nav a {
    font-size: 0.95rem;
    text-decoration: none;
    color: var(--color-muted);
    padding: 6px 0;
    position: relative;
}

nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 200ms ease;
}

nav a:hover,
nav a:focus-visible {
    color: var(--color-text);
}

nav a:hover::after,
nav a:focus-visible::after {
    transform: scaleX(1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
    cursor: pointer;
}

.btn:hover,
.btn:focus-visible {
    transform: translateY(-2px);
}

.btn.primary {
    background: var(--color-accent);
    color: #ffffff;
    box-shadow: 0 16px 32px -24px rgba(43, 89, 255, 0.6);
}

.btn.ghost {
    border-color: var(--color-border);
    color: var(--color-text);
    background: #ffffff;
}

main {
    max-width: 960px;
    margin: 0 auto;
    padding: clamp(48px, 12vw, 96px) clamp(24px, 6vw, 64px) 120px;
    display: flex;
    flex-direction: column;
    gap: clamp(72px, 12vw, 120px);
}

section header {
    display: grid;
    gap: 12px;
    margin-bottom: 32px;
}

.section-eyebrow {
    font-size: 0.8rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-subtle);
}

.section-body {
    color: var(--color-muted);
    max-width: 640px;
}

h1 {
    font-size: clamp(2.4rem, 4vw, 3.2rem);
    line-height: 1.2;
}

h2 {
    font-size: clamp(2rem, 3vw, 2.6rem);
    line-height: 1.25;
}

h3 {
    font-size: 1.25rem;
}

.hero {
    display: grid;
    gap: 24px;
}

.hero-eyebrow {
    font-size: 0.9rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-subtle);
}

.hero-body {
    max-width: 640px;
    color: var(--color-muted);
    font-size: 1.05rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.achievements .achievement-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
}

.achievements article {
    background: var(--color-surface);
    border-radius: var(--radius-base);
    padding: 24px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    display: grid;
    gap: 10px;
}

.achievements p {
    color: var(--color-muted);
}

.achievements ul {
    list-style: disc;
    padding-left: 20px;
    margin: 4px 0 0;
    display: grid;
    gap: 6px;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.achievements .btn {
    margin-top: 12px;
    width: fit-content;
}

.achievement-cta {
    margin-top: 20px;
    display: flex;
    justify-content: center;
}

.highlights .stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.highlights article {
    background: var(--color-surface);
    border-radius: var(--radius-base);
    padding: 24px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    display: grid;
    gap: 12px;
}

.stat {
    font-size: 2.3rem;
    font-weight: 700;
    color: var(--color-accent);
}

.caption {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.projects .project-grid {
    display: grid;
    gap: 24px;
}

.projects article {
    background: var(--color-surface);
    border-radius: var(--radius-base);
    padding: 28px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    display: grid;
    gap: 14px;
}

.projects .meta {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-subtle);
}

.projects ul {
    list-style: none;
    display: grid;
    gap: 8px;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.impact .impact-grid {
    display: grid;
    gap: 18px;
}

.impact article {
    background: var(--color-accent-soft);
    border-radius: var(--radius-base);
    padding: 24px;
    border: 1px solid rgba(43, 89, 255, 0.14);
    display: grid;
    gap: 10px;
}

.experience .timeline {
    list-style: none;
    display: grid;
    gap: 24px;
    position: relative;
}

.experience .timeline::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 12px;
    bottom: 6px;
    width: 2px;
    background: rgba(43, 89, 255, 0.14);
}

.experience li {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 24px;
    padding-left: 32px;
    position: relative;
}

.experience li::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 10px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
}

.experience .time {
    font-weight: 600;
    color: var(--color-subtle);
}

.experience .details p {
    color: var(--color-muted);
    margin-top: 8px;
}

.skills .skill-grid {
    display: grid;
    gap: 16px;
}

.skills ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.skills li {
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    font-size: 0.95rem;
    color: var(--color-muted);
}


.contact .contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.contact article {
    background: var(--color-surface);
    border-radius: var(--radius-base);
    padding: 28px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
    display: grid;
    gap: 12px;
}

.contact-form-card {
    gap: 20px;
}

.contact-form-card--primary {
    border-color: rgba(43, 89, 255, 0.18);
    box-shadow: 0 24px 48px -32px rgba(15, 23, 42, 0.35);
}

.contact-note {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.contact-form {
    display: grid;
    gap: 18px;
}

.contact-form label {
    display: grid;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.contact-form label span {
    font-weight: 600;
    color: var(--color-text);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    border: 1px solid rgba(15, 23, 42, 0.12);
    background: #f9fbff;
    font-family: var(--font-base);
    font-size: 0.95rem;
    color: var(--color-text);
    transition: border-color 160ms ease, box-shadow 160ms ease;
    resize: vertical;
    min-height: 46px;
}

.contact-form textarea {
    min-height: 140px;
}

.contact-form input:focus-visible,
.contact-form textarea:focus-visible {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(43, 89, 255, 0.15);
}

.form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.contact ul {
    list-style: none;
    display: grid;
    gap: 10px;
}

.contact a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
}

.footer {
    max-width: 960px;
    margin: 0 auto 48px;
    padding: 0 clamp(24px, 6vw, 64px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    color: var(--color-subtle);
    font-size: 0.9rem;
}

.footer a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
}



@media (max-width: 960px) {
    .experience li {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .experience .timeline::before {
        left: 8px;
    }

    .experience li {
        padding-left: 24px;
    }

    .experience li::before {
        left: 0;
    }
}

@media (max-width: 720px) {
    nav {
        display: none;
    }

    .header {
        flex-wrap: wrap;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .footer {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 540px) {
    .form-footer {
        flex-direction: column;
        align-items: stretch;
        text-align: left;
    }

    .form-footer .btn {
        width: 100%;
    }

}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}