:root {
    --bg:       #f8f5ef;
    --surface:  #ffffff;
    --text:     #0f0f0f;
    --muted:    #888;
    --accent:   #bf4a2a;
    --border:   rgba(15, 15, 15, 0.1);
    --sidebar-w: 64px;
    --f-display: 'Cormorant Garamond', Georgia, serif;
    --f-mono:    'JetBrains Mono', 'Courier New', monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--f-mono);
    font-size: 20px;
    line-height: 1.7;
    overflow-x: hidden;
}

/* ── Sidebar ──────────────────────────────────────────── */

#sidebar {
    position: fixed;
    left: 0; top: 0;
    width: var(--sidebar-w);
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 28px 0;
    border-right: 1px solid var(--border);
    background: var(--bg);
    z-index: 100;
}

#nav-logo {
    font-family: var(--f-display);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text);
}

#nav-dots {
    display: flex;
    flex-direction: column;
    gap: 18px;
    align-items: center;
}

.nav-dot {
    position: relative;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border);
    display: block;
    transition: background 0.25s, transform 0.25s;
    cursor: pointer;
}

.nav-dot::after {
    content: attr(data-label);
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: 1px;
    color: var(--muted);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.nav-dot:hover::after,
.nav-dot.active::after {
    opacity: 1;
}

.nav-dot.active {
    background: var(--accent);
    transform: scale(1.6);
}

.nav-dot:hover:not(.active) {
    background: var(--text);
    transform: scale(1.3);
}

#nav-clock {
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 1px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
}

/* ── Main ─────────────────────────────────────────────── */

#content {
    /* center within the remaining space after the sidebar */
    margin-left: max(var(--sidebar-w), calc(50vw - 450px + var(--sidebar-w) / 2));
    max-width: 900px;
    padding: 0 48px 140px;
}

/* ── Hero ─────────────────────────────────────────────── */

#hero {
    padding: 100px 0 80px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 80px;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.1s forwards;
}

.hero-label {
    font-size: 12px;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 24px;
}

#hero h1 {
    font-family: var(--f-display);
    font-size: clamp(7rem, 16vw, 14rem);
    font-weight: 300;
    line-height: 0.92;
    letter-spacing: -2px;
    margin-bottom: 32px;
    color: var(--text);
}

#hero h1 em {
    font-style: italic;
    color: var(--accent);
}

.hero-sub {
    font-size: 13px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 28px;
}

.hero-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.hero-tags span {
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    border: 1px solid var(--border);
    padding: 4px 14px;
    color: var(--muted);
}

/* ── Sections ─────────────────────────────────────────── */

.section {
    margin-bottom: 80px;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: 14px;
    margin-bottom: 28px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.section-num {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--accent);
}

.section-header h2 {
    font-family: var(--f-display);
    font-size: 4rem;
    font-weight: 300;
    letter-spacing: -0.5px;
}

/* ── Grid ─────────────────────────────────────────────── */

.section-body {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
}

/* ── Cards ────────────────────────────────────────────── */

.card {
    background: var(--surface);
    padding: 28px;
    transition: background 0.2s;
}

.card:hover {
    background: var(--bg);
}

.card-icon {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 14px;
}

.card-title {
    font-family: var(--f-display);
    font-size: 2.2rem;
    font-weight: 600;
    letter-spacing: -0.3px;
    margin-bottom: 4px;
}

.card-desc {
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 0.3px;
    margin-bottom: 14px;
}

.card-lines {
    list-style: none;
    margin-top: 8px;
}

.card-lines li {
    font-size: 13px;
    padding: 5px 0;
    border-bottom: 1px solid var(--border);
    color: var(--muted);
}

.card-lines li:last-child {
    border-bottom: none;
}

/* ── Contact ──────────────────────────────────────────── */

.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    gap: 12px;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-label {
    font-size: 12px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--muted);
    flex-shrink: 0;
}

.contact-value a {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    transition: color 0.2s, border-color 0.2s;
}

.contact-value a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ── Links ────────────────────────────────────────────── */

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
    padding-bottom: 1px;
    margin-top: 14px;
    transition: opacity 0.2s;
}

.card-link:hover {
    opacity: 0.6;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    background: var(--text);
    color: var(--bg);
    padding: 10px 20px;
    text-decoration: none;
    margin-top: 14px;
    transition: opacity 0.2s;
}

.download-btn:hover {
    opacity: 0.72;
}

/* ── Book Cards ───────────────────────────────────────── */

.card-book {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
}

.book-cover-wrap {
    flex-shrink: 0;
    width: 90px;
}

.book-cover {
    width: 90px;
    display: block;
    box-shadow: 4px 6px 16px rgba(0,0,0,0.18);
    object-fit: cover;
    background: var(--border);
    min-height: 120px;
}

.book-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* reading section: one book per row */
#reading-body {
    grid-template-columns: 1fr;
}

/* ── Thesis Featured Section ──────────────────────────── */

.thesis-section {
    border: 1px solid var(--text);
    background: var(--text);
    color: var(--bg);
    padding: 0;
    margin-bottom: 80px;
}

.thesis-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: #888;
    padding: 14px 28px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.thesis-pulse {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.5; transform: scale(0.75); }
}

.thesis-inner {
    padding: 36px 36px 40px;
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 40px;
    align-items: start;
}

.thesis-meta {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.thesis-meta .section-num {
    color: rgba(255,255,255,0.35);
    font-size: 11px;
    letter-spacing: 2px;
    display: block;
    line-height: 1.5;
}

.thesis-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.thesis-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 12px;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bg);
    text-decoration: none;
    border: 1px solid rgba(255,255,255,0.25);
    padding: 8px 16px;
    transition: border-color 0.2s, color 0.2s;
    align-self: flex-start;
}

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

.thesis-tags span {
    font-size: 11px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border: 1px solid rgba(255,255,255,0.2);
    padding: 3px 10px;
    color: rgba(255,255,255,0.5);
}

.thesis-title {
    font-family: var(--f-display);
    font-size: clamp(3rem, 6vw, 5rem);
    font-weight: 300;
    line-height: 1.15;
    letter-spacing: -0.5px;
    color: #fff;
    grid-column: 1 / -1;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 28px;
    margin-bottom: 4px;
}

.thesis-title em {
    font-style: italic;
    color: var(--accent);
}

.thesis-body {
    grid-column: 1 / -1;
}

.thesis-body p {
    font-size: 14px;
    line-height: 1.8;
    color: rgba(255,255,255,0.65);
    margin-bottom: 24px;
    max-width: 620px;
}

.thesis-body p strong {
    color: rgba(255,255,255,0.9);
    font-weight: 500;
}

.thesis-goals {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.08);
}

.thesis-goal {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    background: var(--text);
    font-size: 13px;
    color: rgba(255,255,255,0.55);
    transition: background 0.2s;
}

.thesis-goal:hover {
    background: #1a1a1a;
    color: rgba(255,255,255,0.85);
}

.thesis-goal i {
    color: var(--accent);
    margin-top: 2px;
    font-size: 0.9rem;
    flex-shrink: 0;
}

@media (max-width: 640px) {
    .thesis-inner {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 24px 20px 28px;
    }

    .thesis-title {
        grid-column: 1;
    }

    .thesis-body {
        grid-column: 1;
    }
}

/* ── Animations ───────────────────────────────────────── */

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ───────────────────────────────────────── */

@media (max-width: 640px) {
    :root { --sidebar-w: 44px; }

    #content {
        margin-left: var(--sidebar-w);
        padding: 0 20px 80px;
    }

    #hero {
        padding: 60px 0 48px;
    }

    #hero h1 {
        font-size: 3.5rem;
        letter-spacing: -1px;
    }

    .section-body {
        grid-template-columns: 1fr;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }
}