:root {
    --paper: #f3ede0;
    --paper-card: #faf7ee;
    --paper-card-alt: #f6f0e2;
    --ink: #22241f;
    --ink-soft: #52523f;
    --ink-faint: #8c8a6f;
    --rule: #d9d0b8;
    --rule-strong: #22241f;
    --accent: #c1440e;
    --accent-soft: rgba(193, 68, 14, 0.12);
    --blue: #1f3a5f;
    --blue-soft: rgba(31, 58, 95, 0.1);
    --green: #3c6e47;
    --green-soft: rgba(60, 110, 71, 0.12);
    --amber: #92600c;
    --amber-soft: rgba(146, 96, 12, 0.12);
    --shadow-hard: 3px 3px 0 rgba(34, 36, 31, 0.12);
    --font-display: 'Fraunces', Georgia, serif;
    --font-body: 'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;
}

:root[data-theme="dark"] {
    --paper: #191a16;
    --paper-card: #211f19;
    --paper-card-alt: #26241d;
    --ink: #ece6d6;
    --ink-soft: #b9b39c;
    --ink-faint: #7d7a63;
    --rule: #3a3a2f;
    --rule-strong: #ece6d6;
    --accent: #e2703a;
    --accent-soft: rgba(226, 112, 58, 0.16);
    --blue: #7fa4d6;
    --blue-soft: rgba(127, 164, 214, 0.14);
    --green: #7fbf8e;
    --green-soft: rgba(127, 191, 142, 0.14);
    --amber: #d9a441;
    --amber-soft: rgba(217, 164, 65, 0.14);
    --shadow-hard: 3px 3px 0 rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --paper: #191a16;
        --paper-card: #211f19;
        --paper-card-alt: #26241d;
        --ink: #ece6d6;
        --ink-soft: #b9b39c;
        --ink-faint: #7d7a63;
        --rule: #3a3a2f;
        --rule-strong: #ece6d6;
        --accent: #e2703a;
        --accent-soft: rgba(226, 112, 58, 0.16);
        --blue: #7fa4d6;
        --blue-soft: rgba(127, 164, 214, 0.14);
        --green: #7fbf8e;
        --green-soft: rgba(127, 191, 142, 0.14);
        --amber: #d9a441;
        --amber-soft: rgba(217, 164, 65, 0.14);
        --shadow-hard: 3px 3px 0 rgba(0, 0, 0, 0.4);
    }
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--paper);
    color: var(--ink);
    min-height: 100vh;
    position: relative;
    padding: 2.5rem 1.5rem 4rem;
    line-height: 1.55;
}

/* Graph-paper + grain texture */
.paper-texture {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image:
        linear-gradient(var(--rule) 1px, transparent 1px),
        linear-gradient(90deg, var(--rule) 1px, transparent 1px);
    background-size: 28px 28px;
    opacity: 0.35;
}
.paper-texture::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
    mix-blend-mode: multiply;
}

/* ---------- Masthead ---------- */
.masthead {
    max-width: 900px;
    margin: 0 auto 2.5rem;
}

.masthead-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding-bottom: 1.25rem;
    border-bottom: 3px solid var(--rule-strong);
}

.stamp-mark {
    display: inline-block;
    font-family: var(--font-body);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: var(--accent);
    border: 1.5px solid var(--accent);
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
    transform: rotate(-2deg);
    margin-bottom: 0.6rem;
}

.masthead-title h1 {
    font-family: var(--font-display);
    font-optical-sizing: auto;
    font-weight: 700;
    font-size: clamp(2.6rem, 6vw, 4rem);
    letter-spacing: -0.01em;
    line-height: 0.95;
}

.cursor-blip {
    color: var(--accent);
    animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.subtitle {
    font-family: var(--font-body);
    color: var(--ink-soft);
    font-size: 0.9rem;
    margin-top: 0.4rem;
}

.masthead-actions {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.ink-btn {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--paper-card);
    border: 1.5px solid var(--rule-strong);
    color: var(--ink);
    padding: 0.5rem 0.9rem;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: var(--shadow-hard);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.ink-btn:hover {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 rgba(34, 36, 31, 0.16);
    background: var(--accent);
    color: var(--paper-card);
    border-color: var(--accent);
}

.status-chip {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--green);
    font-weight: 700;
}
.status-dot {
    width: 8px; height: 8px;
    background: var(--green);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--green-soft);
    animation: pulse 2.4s infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px var(--green-soft); }
    50% { box-shadow: 0 0 0 6px var(--green-soft); }
}

/* ---------- Tabs ---------- */
.tabs-container {
    display: flex;
    gap: 0.25rem;
    margin-top: 1rem;
}

.tab-btn {
    background: transparent;
    border: none;
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 600;
    font-size: 1.15rem;
    color: var(--ink-faint);
    cursor: pointer;
    padding: 0.35rem 0.9rem 0.6rem;
    position: relative;
}
.tab-btn:hover { color: var(--ink); }
.tab-btn.active { color: var(--ink); }
.tab-btn.active::after {
    content: '';
    position: absolute;
    left: 0.4rem; right: 0.4rem; bottom: 0;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
}

/* ---------- Shared layout ---------- */
.tab-content {
    max-width: 900px;
    margin: 0 auto;
}

/* ---------- Log (blog) ---------- */
.log-container {
    display: flex;
    flex-direction: column;
    gap: 2.75rem;
}

.log-entry {
    position: relative;
    background: var(--paper-card);
    border: 1.5px solid var(--rule-strong);
    border-radius: 6px;
    padding: 2rem 2.25rem 1.75rem;
    box-shadow: var(--shadow-hard);
}
.log-entry:nth-child(odd) { transform: rotate(-0.25deg); }
.log-entry:nth-child(even) { transform: rotate(0.25deg); }

.log-tape {
    position: absolute;
    top: -14px;
    left: 2.5rem;
    width: 90px;
    height: 26px;
    background: repeating-linear-gradient(45deg, var(--accent-soft), var(--accent-soft) 6px, transparent 6px, transparent 12px), var(--paper-card-alt);
    border: 1px solid var(--rule);
    opacity: 0.9;
    transform: rotate(-3deg);
}

.log-entry-head {
    display: flex;
    align-items: baseline;
    gap: 0.9rem;
    flex-wrap: wrap;
    margin-bottom: 1.1rem;
}

.log-day {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 700;
    font-size: 2.6rem;
    color: var(--accent);
    line-height: 1;
}

.log-heading { flex: 1; min-width: 200px; }

.log-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    line-height: 1.15;
}

.log-date {
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-top: 0.2rem;
}

.log-section { margin-top: 1.1rem; }

.log-section-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--blue);
    margin-bottom: 0.35rem;
}

.log-section p {
    font-size: 0.92rem;
    color: var(--ink);
}

.log-section p + p { margin-top: 0.6rem; }

.margin-note {
    margin-top: 0.6rem;
    padding: 0.65rem 0.9rem;
    border-left: 3px solid var(--accent);
    background: var(--accent-soft);
    font-size: 0.85rem;
    border-radius: 0 4px 4px 0;
}
.margin-note strong {
    color: var(--accent);
    font-style: italic;
    font-family: var(--font-display);
}

.log-next {
    margin-top: 1.2rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--rule);
    font-size: 0.85rem;
    color: var(--ink-soft);
}
.log-next strong { color: var(--ink); }

/* ---------- Roadmap ---------- */
.roadmap-container {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.phase-section { position: relative; }

.phase-header {
    font-family: var(--font-display);
    font-weight: 700;
    font-style: italic;
    font-size: 1.7rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    border-bottom: 2px solid var(--rule-strong);
    padding-bottom: 0.5rem;
}

.phase-number {
    font-family: var(--font-body);
    font-style: normal;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--ink);
    color: var(--paper-card);
    border-radius: 3px;
    padding: 0.2rem 0.5rem;
}

.timeline {
    position: relative;
    padding-left: 1.6rem;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 0; top: 6px; bottom: 6px;
    width: 2px;
    background: repeating-linear-gradient(to bottom, var(--rule-strong) 0 6px, transparent 6px 11px);
}

.stage-card {
    background: var(--paper-card);
    border: 1.5px solid var(--rule-strong);
    border-radius: 6px;
    padding: 1.35rem 1.5rem;
    margin-bottom: 1.1rem;
    position: relative;
    box-shadow: var(--shadow-hard);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.stage-card:hover { transform: translate(-2px, -2px); box-shadow: 5px 5px 0 rgba(34,36,31,0.16); }

.stage-dot {
    position: absolute;
    left: -1.95rem;
    top: 1.5rem;
    width: 12px; height: 12px;
    background: var(--paper-card);
    border: 2px solid var(--ink);
    border-radius: 50%;
}

.stage-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.15rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}
.stage-title > div { display: flex; align-items: center; gap: 0.65rem; }

.collapse-icon { font-size: 0.75rem; color: var(--ink-faint); transition: transform 0.25s ease; }

.stage-badge {
    font-family: var(--font-body);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
    background: var(--blue-soft);
    color: var(--blue);
    border: 1px solid var(--blue);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.35s ease, opacity 0.35s ease, margin-top 0.35s ease;
}
.collapsible-content.open {
    max-height: 3000px;
    opacity: 1;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--rule);
}

.stage-desc { color: var(--ink-soft); font-size: 0.88rem; margin-bottom: 1.25rem; }

.sub-card {
    background: var(--paper-card-alt);
    border: 1px solid var(--rule);
    border-radius: 5px;
    padding: 1.1rem 1.25rem;
    margin-bottom: 0.9rem;
}
.sub-card h4 {
    font-family: var(--font-display);
    font-style: italic;
    color: var(--blue);
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.task-list { list-style: none; margin-bottom: 0.5rem; }
.task-item {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    margin-bottom: 0.6rem;
    font-size: 0.88rem;
    cursor: pointer;
}
.task-item:hover { color: var(--accent); }

.task-checkbox {
    width: 17px; height: 17px;
    border: 2px solid var(--ink-faint);
    border-radius: 3px;
    margin-top: 0.15rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    cursor: pointer;
}
.task-item.completed .task-checkbox { background: var(--green); border-color: var(--green); }
.task-item.completed .task-checkbox::after { content: '✓'; color: var(--paper-card); font-size: 12px; font-weight: bold; }
.task-item.completed span { text-decoration: line-through; color: var(--ink-faint); }

.notes-list { display: flex; flex-direction: column; gap: 0.5rem; margin-top: 0.75rem; }
.note-item { font-size: 0.82rem; padding: 0.6rem 0.85rem; border-radius: 5px; border-left: 3px solid; background: rgba(0,0,0,0.02); }
.note-video-idea { border-color: var(--accent); } .note-video-idea strong { color: var(--accent); }
.note-mini-project { border-color: var(--blue); } .note-mini-project strong { color: var(--blue); }
.note-gate { border-color: var(--green); background: var(--green-soft); } .note-gate strong { color: var(--green); }
.note-learning { border-color: var(--amber); } .note-learning strong { color: var(--amber); }

/* ---------- Scripts ---------- */
.scripts-layout { display: flex; gap: 1.75rem; align-items: flex-start; }

.scripts-sidebar {
    width: 260px;
    flex-shrink: 0;
    background: var(--paper-card);
    border: 1.5px solid var(--rule-strong);
    border-radius: 6px;
    padding: 1.25rem;
    box-shadow: var(--shadow-hard);
}
.scripts-sidebar h3 {
    font-family: var(--font-display);
    font-style: italic;
    margin-bottom: 0.9rem;
    font-size: 1.1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dashed var(--rule);
}
.scripts-list { list-style: none; display: flex; flex-direction: column; gap: 0.3rem; }
.scripts-list li {
    padding: 0.45rem 0.55rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--ink-soft);
}
.scripts-list li:hover { background: var(--paper-card-alt); color: var(--ink); }
.scripts-list li.active-script { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.scripts-main { flex-grow: 1; min-height: 500px; padding: 1.75rem; background: var(--paper-card); border: 1.5px solid var(--rule-strong); border-radius: 6px; box-shadow: var(--shadow-hard); }

.placeholder-text { color: var(--ink-faint); text-align: center; margin-top: 3rem; font-style: italic; font-family: var(--font-display); }

.markdown-body { line-height: 1.65; font-size: 0.9rem; }
.markdown-body h1, .markdown-body h2, .markdown-body h3 { font-family: var(--font-display); margin-top: 1.4rem; margin-bottom: 0.9rem; }
.markdown-body h1 { font-size: 1.8rem; border-bottom: 2px solid var(--rule-strong); padding-bottom: 0.4rem; }
.markdown-body h2 { font-size: 1.3rem; }
.markdown-body h3 { font-size: 1.05rem; color: var(--blue); font-style: italic; }
.markdown-body p { margin-bottom: 0.9rem; }
.markdown-body ul { margin-left: 1.4rem; margin-bottom: 0.9rem; }
.markdown-body li { margin-bottom: 0.25rem; }
.markdown-body strong { color: var(--accent); }
.markdown-body code { background: var(--paper-card-alt); padding: 0.2em 0.4em; border-radius: 4px; font-size: 0.85em; color: var(--blue); }
.markdown-body pre { background: var(--paper-card-alt); padding: 1rem; border-radius: 6px; overflow-x: auto; border: 1px solid var(--rule); }
.markdown-body pre code { background: none; padding: 0; color: var(--ink); }
.markdown-body hr { border: 0; height: 1px; background: var(--rule); margin: 1.75rem 0; }

/* ---------- Animations ---------- */
@keyframes slideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-slide-in { animation: slideIn 0.45s ease-out forwards; opacity: 0; }

/* ---------- Footer ---------- */
.site-footer {
    max-width: 900px;
    margin: 3rem auto 0;
    padding-top: 1.25rem;
    border-top: 1px dashed var(--rule);
    text-align: center;
    font-size: 0.78rem;
    color: var(--ink-faint);
}
.site-footer a { color: var(--blue); }

@media (max-width: 640px) {
    body { padding: 1.5rem 1rem 3rem; }
    .scripts-layout { flex-direction: column; }
    .scripts-sidebar { width: 100%; }
    .log-entry, .stage-card { padding: 1.5rem 1.25rem; }
    .log-day { font-size: 2rem; }
}