:root {
    --font-body: "Source Sans 3", sans-serif;
    --font-heading: "Space Grotesk", sans-serif;
    --paper: #f6f3ee;
    --surface: rgba(255, 255, 255, 0.88);
    --surface-strong: #ffffff;
    --surface-alt: #ebe5dc;
    --ink: #10253d;
    --ink-muted: #4b6178;
    --signal: #f79320;
    --signal-soft: #ffe0b5;
    --steel: #44668d;
    --line: rgba(16, 37, 61, 0.12);
    --shadow: 0 24px 60px rgba(16, 37, 61, 0.12);
    --hero-overlay: linear-gradient(135deg, rgba(16, 37, 61, 0.9), rgba(68, 102, 141, 0.7));
    --radius: 22px;
    --radius-sm: 14px;
}

body.dark-theme {
    --paper: #081522;
    --surface: rgba(15, 37, 62, 0.9);
    --surface-strong: #10253d;
    --surface-alt: #17344f;
    --ink: #f4f6f9;
    --ink-muted: #c7d2de;
    --signal: #ffac47;
    --signal-soft: rgba(255, 172, 71, 0.2);
    --steel: #9db7d0;
    --line: rgba(217, 222, 229, 0.14);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.32);
    --hero-overlay: linear-gradient(135deg, rgba(8, 21, 34, 0.88), rgba(17, 40, 63, 0.84));
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background:
        radial-gradient(circle at top left, rgba(247, 147, 32, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(68, 102, 141, 0.1), transparent 24%),
        var(--paper);
    color: var(--ink);
    line-height: 1.65;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
}

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

main,
section {
    position: relative;
}

section {
    scroll-margin-top: 7rem;
}

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

.section {
    padding: 5.5rem 0;
}

.section-alt {
    background: rgba(68, 102, 141, 0.05);
}

body.dark-theme .section-alt {
    background: rgba(255, 255, 255, 0.03);
}

.section-label,
.card-kicker,
.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.76rem;
    font-weight: 700;
}

.section-label,
.card-kicker {
    color: var(--signal);
}

.section-heading {
    display: grid;
    gap: 0.85rem;
    max-width: 760px;
    margin-bottom: 2rem;
}

.section-heading h2 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3.15rem);
    line-height: 1.05;
}

.section-heading p {
    font-size: 1.05rem;
    color: var(--ink-muted);
}

.surface-card,
.panel-card,
.skill-card,
.work-card,
.project-card,
.education-card,
.contact-card,
.timeline-content,
.stat-card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.surface-card,
.panel-card,
.skill-card,
.work-card,
.project-card,
.education-card,
.contact-card,
.timeline-content {
    padding: 1.5rem;
}

.surface-card h3,
.panel-card h3,
.skill-card h3,
.work-card h3,
.project-card h3,
.education-card h3,
.contact-card h3,
.timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.24rem;
    line-height: 1.15;
    margin-top: 0.45rem;
}

.surface-card p + p,
.education-card p + p,
.work-card p + .inline-link,
.contact-card p + a {
    margin-top: 1rem;
}

.tag-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin-top: 1rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    background: var(--signal-soft);
    color: var(--ink);
    font-size: 0.88rem;
    font-weight: 700;
}

.card-note,
.project-note,
.inline-note,
.work-card p,
.education-card p,
.skill-card p,
.timeline-content h4,
.timeline-content li,
.surface-card p,
.contact-card p {
    color: var(--ink-muted);
}

.inline-link,
.contact-card a,
.footer-inner a,
.hero-links a {
    text-decoration: none;
    font-weight: 700;
    transition: color 0.25s ease, transform 0.25s ease;
}

.inline-link:hover,
.contact-card a:hover,
.footer-inner a:hover,
.hero-links a:hover {
    color: var(--signal);
}

#hero {
    min-height: 100svh;
    color: #ffffff;
    background-image: var(--hero-overlay), url("img/hero.png");
    background-size: cover;
    background-position: center;
    position: relative;
}

#hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 18% 24%, rgba(247, 147, 32, 0.18), transparent 20%),
        linear-gradient(180deg, rgba(8, 21, 34, 0.1), rgba(8, 21, 34, 0.28));
}

.navbar {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: min(1120px, calc(100% - 2rem));
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.2rem;
    border-radius: 999px;
    background: rgba(15, 37, 62, 0.42);
    border: 1px solid rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(18px);
    z-index: 1000;
}

body.dark-theme .navbar {
    background: rgba(8, 21, 34, 0.75);
}

.logo {
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.05rem;
    color: #ffffff;
    white-space: nowrap;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-left: auto;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.82);
    text-decoration: none;
    font-weight: 600;
}

.nav-links a:hover {
    color: #ffffff;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.menu-toggle,
#theme-toggle {
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    cursor: pointer;
    transition: background-color 0.25s ease, transform 0.25s ease;
}

.menu-toggle:hover,
#theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.menu-toggle {
    display: none;
    width: 2.9rem;
    height: 2.9rem;
    border-radius: 999px;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

#theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.72rem 1rem;
    border-radius: 999px;
    font-size: 0.92rem;
}

.theme-toggle-label {
    font-weight: 700;
}

.hero-grid {
    position: relative;
    z-index: 1;
    min-height: 100svh;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.85fr);
    gap: 2rem;
    align-items: end;
    padding: 8rem 0 2.5rem;
}

.hero-copy {
    max-width: 720px;
}

.eyebrow {
    color: rgba(255, 255, 255, 0.72);
    margin-bottom: 1rem;
}

.hero-copy h1 {
    font-family: var(--font-heading);
    font-size: clamp(2.9rem, 6vw, 5.5rem);
    line-height: 0.98;
    max-width: 11ch;
}

.lede {
    margin-top: 1.4rem;
    max-width: 44rem;
    color: rgba(255, 255, 255, 0.82);
    font-size: 1.15rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.2rem;
    padding: 0.85rem 1.35rem;
    border-radius: 999px;
    background: var(--signal);
    color: #10253d;
    text-decoration: none;
    font-weight: 700;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, filter 0.25s ease, background-color 0.25s ease;
}

.button:hover {
    transform: translateY(-2px);
    filter: brightness(1.04);
}

.button-secondary {
    background: transparent;
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.24);
    box-shadow: none;
}

.button-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem 1.4rem;
    margin-top: 1.35rem;
}

.hero-links a {
    color: rgba(255, 255, 255, 0.82);
}

.hero-panel {
    display: grid;
    gap: 1rem;
}

.panel-card,
.stat-card {
    color: var(--ink);
}

.hero-photo {
    width: 100%;
    max-width: 360px;
    justify-self: end;
    aspect-ratio: 4 / 4.5;
    object-fit: cover;
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.focus-list,
.detail-list {
    list-style: none;
    display: grid;
    gap: 0.8rem;
    margin-top: 1rem;
}

.focus-list li,
.detail-list li {
    position: relative;
    padding-left: 1.1rem;
}

.panel-card .focus-list li {
    color: var(--ink-muted);
}

.focus-list li::before,
.detail-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.68em;
    width: 0.45rem;
    height: 0.45rem;
    border-radius: 50%;
    background: var(--signal);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.85rem;
}

.stat-card {
    padding: 1rem;
}

.stat-card strong {
    display: block;
    color: var(--ink);
    font-family: var(--font-heading);
    font-size: 1.5rem;
}

.stat-card span {
    display: block;
    margin-top: 0.25rem;
    color: var(--ink-muted);
    font-size: 0.94rem;
}

.about-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.9fr);
    gap: 1.5rem;
}

.timeline {
    display: grid;
    gap: 1.5rem;
}

.timeline-item {
    position: relative;
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 1.5rem;
    padding-left: 1.4rem;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.3rem;
    bottom: -1.5rem;
    width: 2px;
    background: var(--line);
}

.timeline-item:last-child::before {
    bottom: 0;
}

.timeline-item::after {
    content: "";
    position: absolute;
    left: -0.35rem;
    top: 0.3rem;
    width: 0.85rem;
    height: 0.85rem;
    border-radius: 50%;
    background: var(--signal);
    box-shadow: 0 0 0 0.35rem var(--signal-soft);
}

.timeline-date {
    padding-top: 0.1rem;
    font-weight: 700;
    color: var(--steel);
}

.timeline-content h4 {
    margin-top: 0.45rem;
    font-size: 1rem;
    font-weight: 600;
}

.skills-grid,
.work-grid,
.projects-grid,
.education-grid,
.contact-grid {
    display: grid;
    gap: 1.25rem;
}

.skills-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.work-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.education-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.skill-card,
.work-card,
.project-card,
.education-card,
.contact-card {
    position: relative;
    overflow: hidden;
}

.skill-card::before,
.work-card::before,
.project-card::before,
.education-card::before,
.contact-card::before {
    content: "";
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, var(--signal), var(--steel));
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.project-header {
    display: flex;
    gap: 1rem;
    justify-content: space-between;
    align-items: flex-start;
}

.project-status {
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.65rem;
    border-radius: 999px;
    background: var(--surface-alt);
    border: 1px solid var(--line);
    color: var(--steel);
    font-size: 0.78rem;
    font-weight: 700;
    white-space: nowrap;
}

.work-date,
.education-date {
    display: inline-block;
    margin-top: 0.55rem;
    color: var(--steel);
    font-weight: 700;
}

.education-degree {
    margin-top: 0.55rem;
    font-weight: 700;
    color: var(--ink);
}

.project-links {
    margin-top: auto;
}

.inline-note {
    display: block;
    margin-top: 1rem;
    font-weight: 700;
}

.contact-card i {
    color: var(--signal);
    font-size: 1.5rem;
}

footer {
    background: #10253d;
    color: rgba(255, 255, 255, 0.82);
    padding: 1.3rem 0;
}

body.dark-theme footer {
    background: #06111b;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
}

.footer-inner a {
    color: #ffffff;
}

@media (max-width: 980px) {
    .hero-grid,
    .about-grid,
    .education-grid {
        grid-template-columns: 1fr;
    }

    .hero-panel {
        grid-template-columns: 1fr;
    }

    .hero-photo {
        justify-self: start;
        max-width: 320px;
    }

    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .contact-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.8rem;
    }

    .timeline-date {
        padding-left: 0.15rem;
    }
}

@media (max-width: 768px) {
    .navbar {
        width: calc(100% - 1rem);
        padding: 0.8rem 0.95rem;
        border-radius: 28px;
        align-items: center;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 0.75rem);
        left: 0;
        right: 0;
        display: none;
        flex-direction: column;
        gap: 0.35rem;
        padding: 0.75rem;
        margin-left: 0;
        border-radius: 24px;
        background: rgba(15, 37, 62, 0.95);
        border: 1px solid rgba(255, 255, 255, 0.12);
        box-shadow: var(--shadow);
    }

    body.dark-theme .nav-links {
        background: rgba(8, 21, 34, 0.96);
    }

    .nav-links[data-open="true"] {
        display: flex;
    }

    .nav-links a {
        display: block;
        padding: 0.72rem 0.85rem;
        border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
        background: rgba(255, 255, 255, 0.08);
    }

    .menu-toggle {
        display: inline-flex;
    }

    .theme-toggle-label {
        display: none;
    }

    #theme-toggle {
        padding: 0.72rem 0.88rem;
    }

    .hero-grid {
        padding-top: 7.5rem;
    }

    .skills-grid,
    .contact-grid,
    .stat-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 640px) {
    .section {
        padding: 4.5rem 0;
    }

    .container {
        width: min(1120px, calc(100% - 1.2rem));
    }

    .hero-copy h1 {
        max-width: 13ch;
    }

    .hero-actions {
        flex-direction: column;
    }

    .button {
        width: 100%;
    }

    .hero-links {
        flex-direction: column;
        gap: 0.7rem;
    }

    .work-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
}