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

html {
    scroll-behavior: smooth;
}

/* ─── Focus styles ──────────────────────────────────────────── */
:focus-visible {
    outline: 2px solid #94a3b8;
    outline-offset: 3px;
    border-radius: 3px;
}

.sidebar :focus-visible {
    outline-color: rgba(255, 255, 255, 0.5);
}

/* ─── Scroll progress bar ───────────────────────────────────── */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--sidebar-faint);
    z-index: 100;
    transition: width 0.08s linear;
    pointer-events: none;
}

@media (max-width: 768px) {
    #scroll-progress {
        top: var(--topbar-h);
    }
}

:root {
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;

    --topbar-h: 52px;
    --font-sans: 'Inter', system-ui, sans-serif;
    --font-serif: 'DM Serif Display', Georgia, serif;
    --sidebar-w: 280px;

    /* Light mode tokens — all AA compliant on #f8fafc */
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --text: #1e293b; /* 12.6:1 */
    --text-muted: #475569; /* 6.0:1  */
    --text-faint: #64748b; /* 4.6:1  */
    --heading: #0f172a; /* 16.7:1 */
    --sidebar-bg: #0f172a;
    --sidebar-text: #e2e8f0;
    --sidebar-muted: #94a3b8;
    --sidebar-faint: #64748b;
    --sidebar-border: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] {
    --bg: #0d1117;
    --bg-card: #161b22;
    --border: #30363d;
    --border-hover: #484f58;
    --text: #e6edf3; /* 14.5:1 */
    --text-muted: #b1bac4; /* 8.0:1  */
    --text-faint: #8b949e; /* 5.0:1  */
    --heading: #f0f6fc; /* 16.4:1 */
    --sidebar-bg: #010409;
    --sidebar-text: #e2e8f0;
    --sidebar-muted: #94a3b8;
    --sidebar-faint: #64748b;
    --sidebar-border: rgba(255, 255, 255, 0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    transition: background 0.3s, color 0.3s;
}

/* ─── Layout ───────────────────────────────────────────────── */
.layout {
    display: flex;
    min-height: 100vh;
}

/* ─── Sidebar ──────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    transition: background 0.3s;
}

.sidebar__inner {
    padding: 2.5rem 2rem;
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
    min-height: 100%;
}

/* Profile */
.profile__name {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 400;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 0.4rem;
}

.profile__title {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--sidebar-muted);
}

/* Nav */
.sidebar__nav {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.sidebar__nav a {
    color: var(--sidebar-muted);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.35rem 0;
    border-left: 2px solid transparent;
    padding-left: 0.75rem;
    transition: color 0.2s, border-color 0.2s;
}

.sidebar__nav a:hover,
.sidebar__nav a.is-active {
    color: #fff;
    border-left-color: var(--sidebar-faint);
}

.sidebar__nav a.is-active {
    border-left-color: #fff;
}

/* Contact */
.contact {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: auto;
}

.contact__item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.8rem;
    color: var(--sidebar-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.contact__item:hover {
    color: var(--sidebar-text);
}

.contact__item svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Sidebar footer group */
.sidebar__footer {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--sidebar-border);
}

/* Last updated */
.last-updated {
    font-size: 0.7rem;
    color: var(--sidebar-faint);
    letter-spacing: 0.04em;
}

/* Theme toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: 1px solid var(--sidebar-border);
    border-radius: 6px;
    padding: 0.4rem 0.75rem;
    color: var(--sidebar-muted);
    font-size: 0.75rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
    width: 100%;
}

.theme-toggle:hover {
    color: var(--sidebar-text);
    border-color: var(--sidebar-muted);
}

.theme-toggle svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

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

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

/* Download CV button */
.download-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: 1px solid var(--sidebar-border);
    border-radius: 6px;
    padding: 0.4rem 0.75rem;
    color: var(--sidebar-muted);
    font-size: 0.75rem;
    font-family: var(--font-sans);
    text-decoration: none;
    transition: color 0.2s, border-color 0.2s;
    width: 100%;
}

.download-btn:hover {
    color: var(--sidebar-text);
    border-color: var(--sidebar-muted);
}

.download-btn svg {
    width: 13px;
    height: 13px;
    flex-shrink: 0;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ─── Main Content ─────────────────────────────────────────── */
.main {
    margin: auto;
    flex: 1;
    padding: 2.5rem 3rem;
    max-width: 800px;
    opacity: 0;
}

/* ─── Sections ─────────────────────────────────────────────── */
.section {
    margin-bottom: 1.5rem;
    scroll-margin-top: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem 2.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05), 0 4px 20px rgba(0,0,0,0.04);
    transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

[data-theme="dark"] .section {
    box-shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 20px rgba(0,0,0,0.2);
}

@media (max-width: 768px) {
    .section {
        scroll-margin-top: calc(var(--topbar-h) + 1rem);
        padding: 1.5rem;
        border-radius: 8px;
    }
}

.section__title {
    font-family: var(--font-serif), serif;
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--heading);
    margin-bottom: 1.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
}

/* Summary */
.summary {
    font-size: 1rem;
    color: var(--text-muted);
    line-height: 1.8;
    font-weight: 300;
}

/* Experience */
.experience-item {
    margin-bottom: 2.25rem;
}

.experience-item:last-child {
    margin-bottom: 0;
}

.experience-item__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-bottom: 0.2rem;
    flex-wrap: wrap;
}

.experience-item__title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--heading);
}

.experience-item__company {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.experience-item__dates {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-faint);
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.experience-item__bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.experience-item__bullets li {
    font-size: 0.875rem;
    color: var(--text-muted);
    padding-left: 1.1rem;
    position: relative;
}

.experience-item__bullets li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--border-hover);
    font-size: 0.75rem;
    top: 0.05em;
}

/* Portfolio */
#portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
    perspective: 1000px;
}

.portfolio-item {
    display: block;
    text-decoration: none;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.1rem 1.25rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    transform-style: preserve-3d;
    will-change: transform;
}

.portfolio-item:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 24px -6px rgba(15, 23, 42, 0.12);
}

.portfolio-item__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.portfolio-item__name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--slate-800);
}

.portfolio-item__name {
    color: var(--heading);
    flex: 1;
}

.portfolio-item__ext {
    width: 12px;
    height: 12px;
    flex-shrink: 0;
    color: var(--text-faint);
    transition: color 0.2s;
}

.portfolio-item:hover .portfolio-item__ext {
    color: var(--text-muted);
}

.portfolio-item__tech {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-faint);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}

.portfolio-item__description {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 0.75rem;
}

.portfolio-item__url {
    font-size: 0.7rem;
    color: var(--text-faint);
    font-family: monospace;
}

/* Skills */
.skills-group {
    margin-bottom: 1rem;
}

.skills-group:last-child {
    margin-bottom: 0;
}

.skills-group__label {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 0.6rem;
}

.skills-group__tags {
    display: flex;
    flex-wrap: wrap;
    row-gap: 0.35rem;
    column-gap: 0.25rem;
}

.skill-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.2rem 0.45rem;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.3s, color 0.3s;
    cursor: default;
}

.skill-tag:hover {
    transform: translateY(-1px);
    border-color: transparent;
    animation: glow-orbit 1.4s linear infinite;
}

@keyframes glow-orbit {
    0% {
        box-shadow: 3px 0 8px -3px rgba(100, 116, 139, 0.35), 0 0 0 1px rgba(100, 116, 139, 0.15);
    }
    25% {
        box-shadow: 0 3px 8px -3px rgba(100, 116, 139, 0.35), 0 0 0 1px rgba(100, 116, 139, 0.15);
    }
    50% {
        box-shadow: -3px 0 8px -3px rgba(100, 116, 139, 0.35), 0 0 0 1px rgba(100, 116, 139, 0.15);
    }
    75% {
        box-shadow: 0 -3px 8px -3px rgba(100, 116, 139, 0.35), 0 0 0 1px rgba(100, 116, 139, 0.15);
    }
    100% {
        box-shadow: 3px 0 8px -3px rgba(100, 116, 139, 0.35), 0 0 0 1px rgba(100, 116, 139, 0.15);
    }
}

/* Education */
.education-item {
    margin-bottom: 1.5rem;
}

.education-item:last-child {
    margin-bottom: 0;
}

.education-item__qualification {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--heading);
}

.education-item__institution {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.education-item__dates {
    font-size: 0.775rem;
    color: var(--text-faint);
    margin-top: 0.2rem;
}

/* ─── Topbar (mobile only) ─────────────────────────────────── */
.topbar {
    display: none;
}

/* ─── Sidebar overlay ──────────────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 40;
    opacity: 0;
    transition: opacity 0.3s;
}

.sidebar-overlay.is-active {
    display: block;
    opacity: 1;
}

/* ─── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
    .topbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0 1.25rem;
        height: var(--topbar-h);
        background: var(--sidebar-bg);
        position: sticky;
        top: 0;
        z-index: 50;
        transition: background 0.3s;
    }

    .topbar__hamburger {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
        width: 30px;
        height: 30px;
    }

    .topbar__hamburger span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--sidebar-text);
        border-radius: 2px;
        transition: transform 0.3s ease, opacity 0.2s ease, background 0.2s;
        transform-origin: center;
    }

    .topbar__hamburger.is-open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .topbar__hamburger.is-open span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .topbar__hamburger.is-open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .topbar__theme {
        background: none;
        border: none;
        cursor: pointer;
        color: var(--sidebar-muted);
        padding: 4px;
    }

    .topbar__theme svg {
        width: 18px;
        height: 18px;
        stroke: currentColor;
        fill: none;
        stroke-width: 1.8;
        stroke-linecap: round;
        stroke-linejoin: round;
        display: block;
    }

    .layout {
        flex-direction: column;
    }

    .sidebar {
        position: fixed;
        top: var(--topbar-h);
        left: 0;
        width: var(--sidebar-w);
        height: calc(100vh - var(--topbar-h));
        z-index: 45;
        transform: translateX(-100%);
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .sidebar.is-open {
        transform: translateX(0);
    }

    .sidebar__inner {
        padding: 2rem 1.5rem;
    }

    .theme-toggle {
        display: none;
    }

    .main {
        padding: 2rem 1.5rem;
        opacity: 0;
    }
}

/* ─── Print ────────────────────────────────────────────────── */
@media print {
    * {
        animation: none !important;
        transition: none !important;
        opacity: 1 !important;
        transform: none !important;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
        background-color: white;

    }

    #scroll-progress,
    .topbar,
    .sidebar-overlay,
    .sidebar__nav,
    .sidebar__footer,
    .theme-toggle {
        display: none !important;
    }

    .layout {
        display: block;
    }

    .sidebar {
        background: none;
        color: #1e293b;
        position: relative;
        width: 100%;
        height: auto;
    }

    .sidebar__inner {
        padding: 0.3rem 1rem 2rem;
        display: grid;
        grid-template-columns: auto 1fr;
        grid-template-rows: auto auto;
        column-gap: 3rem;
        row-gap: 0.5rem;
        border-bottom: 1px solid #e2e8f0;
        margin-bottom: 1.5rem;
    }

    .profile {
        grid-column: 1;
        grid-row: 1 / 3;
        align-self: center;
        margin-bottom: 1.5rem;
    }

    .profile__name {
        color: #0f172a;
        font-size: 1.5rem;
    }

    .profile__title {
        color: #475569;;
    }

    .contact {
        grid-column: 2;
        grid-row: 1;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.3rem 1.5rem;
        margin-top: 0;
        align-self: center;
    }

    .contact__item {
        color: #475569;
        font-size: 0.7rem;
    }

    .main {
        padding: 0;
        max-width: 100%;
    }

    .section {
        margin-bottom: 1.5rem;
    }

    .section__title {
        font-size: 1.1rem;
    }

    .portfolio-item {
        border-color: #e2e8f0;
    }

    .skill-tag {
        border-color: #e2e8f0;
        color: #475569;
        background: none;
    }
}