/* ---------- Design tokens ---------- */
:root {
    --bg: #fbfbfa;
    --surface: #ffffff;
    --hover: #f3f5f6;
    --text: #1d2730;
    --text-2: #3f4c58;
    --muted: #66727e;
    --border: #e4e7ea;
    --accent: #1a5f7a;
    --accent-soft: rgba(26, 95, 122, 0.08);
    --on-accent: #ffffff;
    --metric-fg: #17663b;
    --metric-bg: rgba(39, 174, 96, 0.12);
    --tag-bg: #f2f4f6;
    --nav-bg: rgba(251, 251, 250, 0.85);
    --logo-bg: #ffffff;
    --shadow: 0 10px 30px rgba(20, 30, 40, 0.06);

    --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;

    color-scheme: light;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg: #111417;
        --surface: #171b1f;
        --hover: #1a1f24;
        --text: #e6e9ec;
        --text-2: #bcc5cd;
        --muted: #8d98a3;
        --border: #272d33;
        --accent: #6cb8d6;
        --accent-soft: rgba(108, 184, 214, 0.12);
        --on-accent: #0b1a21;
        --metric-fg: #74d8a0;
        --metric-bg: rgba(116, 216, 160, 0.12);
        --tag-bg: #1d2227;
        --nav-bg: rgba(17, 20, 23, 0.85);
        --logo-bg: #ffffff;
        --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
        color-scheme: dark;
    }
}

:root[data-theme="dark"] {
    --bg: #111417;
    --surface: #171b1f;
    --hover: #1a1f24;
    --text: #e6e9ec;
    --text-2: #bcc5cd;
    --muted: #8d98a3;
    --border: #272d33;
    --accent: #6cb8d6;
    --accent-soft: rgba(108, 184, 214, 0.12);
    --on-accent: #0b1a21;
    --metric-fg: #74d8a0;
    --metric-bg: rgba(116, 216, 160, 0.12);
    --tag-bg: #1d2227;
    --nav-bg: rgba(17, 20, 23, 0.85);
    --logo-bg: #ffffff;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    color-scheme: dark;
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.65;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    transition: background 0.25s ease, color 0.25s ease;
}

a {
    color: inherit;
}

svg {
    flex-shrink: 0;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 6px;
}

.skip-link {
    position: absolute;
    left: 16px;
    top: -48px;
    z-index: 100;
    padding: 8px 14px;
    border-radius: 8px;
    background: var(--accent);
    color: var(--on-accent);
    text-decoration: none;
    font-weight: 500;
}

.skip-link:focus {
    top: 12px;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.container {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Navigation ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--nav-bg);
    -webkit-backdrop-filter: saturate(160%) blur(10px);
    backdrop-filter: saturate(160%) blur(10px);
    border-bottom: 1px solid var(--border);
}

.nav-inner {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 24px;
    height: 56px;
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-brand {
    font-family: var(--font-serif);
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    color: var(--text);
}

.nav-links {
    display: flex;
    gap: 22px;
    margin-left: auto;
}

.nav-links a {
    position: relative;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted);
    text-decoration: none;
    padding: 4px 0;
    transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    border-radius: 2px;
    background: var(--accent);
}

.theme-toggle {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-2);
    cursor: pointer;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.theme-toggle svg {
    width: 17px;
    height: 17px;
}

.icon-sun {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .icon-sun {
        display: block;
    }

    :root:not([data-theme="light"]) .icon-moon {
        display: none;
    }
}

:root[data-theme="dark"] .icon-sun {
    display: block;
}

:root[data-theme="dark"] .icon-moon {
    display: none;
}

/* ---------- Header ---------- */
.header {
    text-align: center;
    padding: 64px 0 56px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 64px;
}

.profile-photo {
    display: block;
    width: 132px;
    height: 132px;
    margin: 0 auto 28px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 0 0 4px var(--bg), 0 0 0 5px var(--border);
}

.name {
    font-family: var(--font-serif);
    font-size: 2.75rem;
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: 10px;
}

.tagline {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--accent);
    min-height: 1.65em;
    margin-bottom: 18px;
}

#typewriter.typing::after {
    content: '';
    display: inline-block;
    width: 2px;
    height: 1.05em;
    margin-left: 4px;
    vertical-align: -0.15em;
    background: currentColor;
    animation: blink 1s steps(2, start) infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 22px;
    font-size: 0.9rem;
    color: var(--muted);
}

.meta-item {
    display: block;
}

.meta-item svg {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-right: 6px;
    vertical-align: -3px;
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--metric-bg);
    color: var(--metric-fg);
    font-size: 0.8125rem;
    font-weight: 500;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    box-shadow: 0 0 0 0 currentColor;
    animation: pulse 2.4s ease-out infinite;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(39, 174, 96, 0.45);
    }

    70%,
    100% {
        box-shadow: 0 0 0 7px rgba(39, 174, 96, 0);
    }
}

.actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: 999px;
    border: 1px solid var(--border);
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.2;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn svg {
    width: 16px;
    height: 16px;
}

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--on-accent);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn-ghost {
    background: var(--surface);
    color: var(--text-2);
}

.btn-ghost:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ---------- Sections ---------- */
.section {
    margin-bottom: 72px;
    scroll-margin-top: 80px;
}

.section-title {
    position: relative;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text);
    padding-bottom: 14px;
    margin-bottom: 28px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 48px;
    height: 2px;
    background: var(--accent);
}

.job-title,
.project-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.35;
    color: var(--text);
}

.company {
    font-size: 0.925rem;
    color: var(--muted);
    margin-top: 2px;
}

.duration {
    flex-shrink: 0;
    white-space: nowrap;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--muted);
    font-variant-numeric: tabular-nums;
    padding-top: 3px;
}

.metric {
    background: var(--metric-bg);
    color: var(--metric-fg);
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 4px;
    -webkit-box-decoration-break: clone;
    box-decoration-break: clone;
}

.inline-link {
    color: var(--accent);
    font-weight: 500;
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

/* ---------- Experience timeline ---------- */
.timeline {
    list-style: none;
    position: relative;
    padding-left: 28px;
}

.experience-item {
    position: relative;
    padding: 18px 20px;
    margin-bottom: 8px;
    border-radius: 14px;
    transition: background 0.2s ease;
}

.experience-item:hover {
    background: var(--hover);
}

/* Dot, vertically centred on the logo */
.experience-item::before {
    content: '';
    position: absolute;
    left: -27px;
    top: 34px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--accent);
    z-index: 1;
}

.experience-item:first-child::before {
    background: var(--accent);
}

/* Line from this dot to the next one */
.experience-item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: -22px;
    top: 40px;
    bottom: -42px;
    width: 2px;
    background: var(--border);
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 14px;
}

.company-header {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.logo-box {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    padding: 5px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--logo-bg);
}

.company-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.achievements {
    list-style: none;
    padding-left: 58px;
}

.achievements li {
    position: relative;
    padding-left: 18px;
    margin-bottom: 10px;
    font-size: 0.95rem;
    color: var(--text-2);
}

.achievements li:last-child {
    margin-bottom: 0;
}

.achievements li::before {
    content: '';
    position: absolute;
    left: 2px;
    top: 0.68em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.7;
}

/* ---------- Projects ---------- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.project-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 22px 24px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--surface);
    scroll-margin-top: 80px;
    transition: border-color 0.2s ease, background 0.2s ease;
}

.project-card:hover {
    border-color: var(--accent);
}

.project-card.featured {
    grid-column: 1 / -1;
}

.project-card p {
    font-size: 0.95rem;
    color: var(--text-2);
}

.project-head {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 8px 12px;
}

.project-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 2px 10px;
    border-radius: 999px;
    background: var(--metric-bg);
    color: var(--metric-fg);
    font-size: 0.75rem;
    font-weight: 600;
}

.project-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: currentColor;
}

.project-card .project-sub {
    margin-top: -6px;
    font-size: 0.85rem;
    color: var(--muted);
}

.project-card .project-note {
    font-size: 0.8rem;
    color: var(--muted);
}

.project-link {
    margin-top: auto;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
}

.project-link:hover {
    text-decoration: underline;
    text-underline-offset: 3px;
}

@media (min-width: 860px) {
    .project-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

/* ---------- Tags (projects and skills) ---------- */
.tags {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tags li {
    padding: 3px 10px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--tag-bg);
    color: var(--text-2);
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* ---------- Skills ---------- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 40px;
}

.skill-category h3 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--muted);
    margin-bottom: 12px;
}

/* ---------- Education ---------- */
.education-item {
    margin-bottom: 26px;
}

.education-item .job-header {
    margin-bottom: 0;
}

.grade {
    margin-top: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-2);
}

/* ---------- Footer ---------- */
.footer {
    border-top: 1px solid var(--border);
}

.footer-inner {
    max-width: 880px;
    margin: 0 auto;
    padding: 28px 24px 40px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px 24px;
    font-size: 0.875rem;
    color: var(--muted);
}

.footer-links {
    display: flex;
    gap: 18px;
}

.footer-links a {
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--accent);
}

/* ---------- Back to top ---------- */
.back-to-top {
    position: fixed;
    right: 20px;
    bottom: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-2);
    font-size: 1rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s, color 0.2s ease, border-color 0.2s ease;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.back-to-top:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ---------- Reveal on scroll (only when JS is running) ---------- */
.js .fade-in {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.js .fade-in.visible {
    opacity: 1;
    transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 720px) {

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

    .job-header {
        flex-direction: column;
        gap: 6px;
    }

    .experience-item .duration {
        padding-left: 58px;
        padding-top: 0;
    }
}

@media (max-width: 600px) {

    .container,
    .nav-inner,
    .footer-inner {
        padding-left: 16px;
        padding-right: 16px;
    }

    .nav-brand {
        display: none;
    }

    .nav-inner {
        gap: 12px;
    }

    .nav-links {
        margin-left: 0;
        margin-right: auto;
        gap: 18px;
    }

    .header {
        padding: 40px 0 40px;
        margin-bottom: 48px;
    }

    .profile-photo {
        width: 112px;
        height: 112px;
        margin-bottom: 22px;
    }

    .name {
        font-size: 2.1rem;
    }

    .actions .btn-primary {
        flex-basis: 100%;
    }

    .actions .btn-ghost {
        flex: 1;
        padding-left: 10px;
        padding-right: 10px;
    }

    .timeline {
        padding-left: 18px;
    }

    .experience-item {
        padding: 14px 4px 14px 10px;
    }

    .experience-item:hover {
        background: transparent;
    }

    .experience-item::before {
        left: -17px;
        top: 30px;
    }

    .experience-item:not(:last-child)::after {
        left: -12px;
        top: 36px;
        bottom: -38px;
    }

    .achievements,
    .experience-item .duration {
        padding-left: 0;
    }

    .project-card {
        padding: 20px;
    }

    .section {
        margin-bottom: 56px;
    }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }

    .js .fade-in {
        opacity: 1;
        transform: none;
    }
}