/* ── Theme Variables ── */
:root {
    --bg: #f5f5f0;
    --bg-alt: #efefe9;
    --text: #1a1a1a;
    --text-muted: #555;
    --text-faint: #888;
    --border: rgba(0, 0, 0, 0.1);
    --border-light: rgba(0, 0, 0, 0.05);
    --accent: #2563eb;
    --accent-bg: #dbeafe;
    --topbar-bg: rgba(239, 239, 233, 0.95);
}

[data-theme="dark"] {
    --bg: #0e0e0e;
    --bg-alt: #141414;
    --text: #e8e8e8;
    --text-muted: #999;
    --text-faint: #666;
    --border: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.05);
    --accent: #7dd3fc;
    --accent-bg: rgba(125, 211, 252, 0.15);
    --topbar-bg: rgba(14, 14, 14, 0.95);
}

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

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* ── Top Bar (sticky) ── */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 44px;
    background: var(--topbar-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: background 0.25s ease, border-color 0.25s ease;
}

.topbar-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.topbar-link {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.82em;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: color 0.2s;
}

.topbar-link:hover {
    color: var(--text);
}

/* ── Theme Toggle ── */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    padding: 0;
    position: absolute;
    right: 16px;
    color: var(--text-muted);
}

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

.theme-toggle svg {
    width: 16px;
    height: 16px;
    display: none;
}

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

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

/* ── Wrapper ── */
.wrapper {
    max-width: 100%;
    margin: 0 auto;
    padding: 68px 8vw 80px 4vw;
}

/* ── Header ── */
header {
    margin-bottom: 40px;
}

header h1 {
    font-family: 'Playfair Display', serif;
    font-size: 3em;
    font-weight: 900;
    letter-spacing: -1.5px;
    color: var(--text);
    margin-bottom: 6px;
}

.tagline {
    font-size: 0.78em;
    color: var(--text-faint);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* ── Two-column grid ── */
.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.column {
    display: flex;
    flex-direction: column;
}

/* ── Section headings ── */
section {
    margin-bottom: 36px;
}

section h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.1em;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 18px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

/* ── Entries (left column — larger) ── */
.left-column .entry {
    margin-bottom: 24px;
}

.left-column .entry h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.25em;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 2px;
}

.left-column .entry h3 a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}

.left-column .entry h3 a:hover {
    color: var(--accent);
}

.left-column .entry .role {
    font-size: 0.92em;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 6px;
}

.left-column .entry p {
    font-size: 0.95em;
    color: var(--text-muted);
    line-height: 1.6;
}

.link-arrow {
    font-size: 0.85em;
    color: var(--text-faint);
    text-decoration: none;
    margin-left: 6px;
    transition: color 0.2s;
}

.link-arrow:hover {
    color: var(--accent);
}

/* ── Bio (right column — smaller) ── */
.bio p {
    font-size: 0.9em;
    line-height: 1.7;
    color: var(--text-muted);
    margin-bottom: 0;
}

/* ── Projects (right column — smaller) ── */
.projects h2 {
    font-size: 1.1em;
}

.project-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.project-list li a {
    text-decoration: none;
    color: var(--text);
    font-size: 0.85em;
    font-weight: 500;
    display: block;
    padding: 5px 0;
    border-bottom: 1px solid var(--border-light);
    transition: color 0.2s, border-color 0.2s;
}

.project-list li a:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.project-list li a::after {
    content: ' →';
    opacity: 0;
    transition: opacity 0.2s;
    color: var(--accent);
}

.project-list li a:hover::after {
    opacity: 1;
}

/* ── Scramble Effect ── */
.scramble-trigger {
    display: inline-block;
    max-width: 100%;
}

/* Keep header children stacked vertically even with scramble-trigger */
header > .scramble-trigger {
    display: block;
}

.is-scrambling {
    font-variant-ligatures: none;
    text-rendering: geometricPrecision;
    user-select: none;
    cursor: default;
}

.scramble-char {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.is-scrambling .scramble-char {
    font-variant-ligatures: none;
    text-rendering: geometricPrecision;
}

.scramble-anchor {
    visibility: hidden;
    white-space: pre;
    position: absolute;
    pointer-events: none;
}

@media (hover: hover) and (pointer: fine) {
    .scramble-trigger {
        transition: color 0.2s ease;
    }
}

/* ── Copy Toast ── */
.copy-toast {
    position: fixed;
    top: 52px;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: var(--text);
    color: var(--bg);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85em;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 2000;
}

.copy-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ── Responsive ── */
@media (max-width: 820px) {
    .grid {
        display: flex;
        flex-direction: column;
        gap: 0;
    }

    section {
        margin-bottom: 8px;
    }

    /* Dissolve column wrappers so sections can be reordered independently */
    .column {
        display: contents;
    }

    /* Mobile order: bio → experience → open source → projects */
    .bio { order: 1; }
    .left-column section:first-of-type { order: 2; } /* Experience */
    .left-column section:nth-of-type(2) { order: 3; } /* Open Source */
    .projects { order: 4; }

    .wrapper {
        padding: 60px 16px 60px 16px;
    }

    header h1 {
        font-size: 2.2em;
    }

    .tagline {
        font-size: clamp(0.38em, 2.2vw, 0.55em);
        letter-spacing: 0;
        white-space: nowrap;
    }

    section h2 {
        font-size: clamp(0.85em, 3.5vw, 1.3em);
        white-space: nowrap;
    }

    .entry .role {
        font-size: clamp(0.7em, 2.8vw, 0.92em);
        white-space: nowrap;
    }

    .left-column .entry h3 {
        font-size: 1.1em;
    }
}

@media (max-width: 500px) {
    .topbar {
        height: 40px;
    }

    .topbar-links {
        gap: 12px;
    }

    .topbar-link {
        font-size: 0.72em;
    }

    .wrapper {
        padding-top: 56px;
    }

    header h1 {
        font-size: 1.8em;
    }
}