/* ============================================
   overthink — website styles
   Aesthetic: vintage newspaper × modern terminal
   ============================================ */

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

:root {
    --paper: #faf8f4;
    --ink: #1a1817;
    --ink-light: #4a4745;
    --ink-faint: #8a8785;
    --accent: #b44a2d;
    --accent-hover: #933d24;
    --rule: #c8c3bc;
    --terminal-bg: #0d1117;
    --terminal-text: #c9d1d9;
    --green: #3fb950;
    --yellow: #d29922;
    --red: #f85149;
    --serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;
    --mono: 'DM Mono', 'Menlo', 'Consolas', monospace;
    --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
    scroll-behavior: smooth;
    font-size: 17px;
}

body {
    font-family: var(--sans);
    line-height: 1.7;
    color: var(--ink);
    background: var(--paper);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}
a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 3px;
}

/* --- Masthead (newspaper header) --- */
.masthead {
    max-width: 740px;
    margin: 0 auto;
    padding: 30px 24px 0;
    text-align: center;
}

.masthead-rule {
    height: 2px;
    background: var(--ink);
    margin-bottom: 16px;
}

.masthead-rule + .masthead-inner + .masthead-rule {
    margin-top: 16px;
    margin-bottom: 12px;
}

.masthead-edition {
    font-family: var(--sans);
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 8px;
    font-weight: 500;
}

.masthead-title {
    font-family: var(--serif);
    font-size: 4.5rem;
    font-weight: 400;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 6px;
}

.masthead-subtitle {
    font-family: var(--serif);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--ink-light);
    letter-spacing: 0.01em;
}

.masthead-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 12px 0 20px;
    font-family: var(--sans);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

.masthead-nav a {
    color: var(--ink-light);
    text-decoration: none;
}
.masthead-nav a:hover {
    color: var(--accent);
    text-decoration: none;
}

.nav-dot {
    color: var(--rule);
    user-select: none;
}

/* --- Page & shared section styles --- */
.page {
    max-width: 740px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

.section-heading {
    font-family: var(--serif);
    font-size: 1.85rem;
    font-weight: 400;
    color: var(--ink);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.section-subheading {
    font-size: 0.88rem;
    color: var(--ink-faint);
    margin-bottom: 32px;
    font-style: italic;
}

/* --- Headline section --- */
.headline-section {
    padding: 36px 0 32px;
    border-bottom: 1px solid var(--rule);
    margin-bottom: 36px;
}

.kicker {
    font-family: var(--sans);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--accent);
    margin-bottom: 12px;
}

.headline {
    font-family: var(--serif);
    font-size: 2.4rem;
    font-weight: 400;
    line-height: 1.2;
    color: var(--ink);
    margin-bottom: 16px;
    letter-spacing: -0.015em;
}

.byline {
    font-size: 0.82rem;
    color: var(--ink-faint);
    font-style: italic;
}

.author {
    font-style: normal;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-light);
}

/* --- Lede / body text --- */
.lede {
    margin-bottom: 36px;
    font-size: 1.05rem;
    color: var(--ink);
}

.lede p {
    margin-bottom: 16px;
}

.dropcap-wrap p:first-child::first-letter {
    display: none;
}

.dropcap {
    font-family: var(--serif);
    float: left;
    font-size: 4.2rem;
    line-height: 0.78;
    padding-right: 10px;
    padding-top: 6px;
    color: var(--ink);
    font-weight: 400;
}

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

strong {
    font-weight: 650;
}

.inline-code {
    font-family: var(--mono);
    font-size: 0.88em;
    background: rgba(0,0,0,0.05);
    padding: 2px 7px;
    border-radius: 3px;
    color: var(--ink);
}

/* --- Pull Quote --- */
.pull-quote {
    margin: 40px 0;
    padding: 32px 0;
    border-top: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    text-align: center;
}

.pull-quote blockquote {
    font-family: var(--serif);
    font-size: 1.55rem;
    font-style: italic;
    line-height: 1.45;
    color: var(--ink);
    max-width: 560px;
    margin: 0 auto 12px;
}

.pull-quote cite {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-faint);
    font-style: normal;
    letter-spacing: 0.02em;
}

/* --- Terminal Demo --- */
.terminal-section {
    margin: 48px 0;
}

.terminal {
    border-radius: 10px;
    overflow: hidden;
    box-shadow:
        0 4px 6px rgba(0,0,0,0.06),
        0 20px 40px rgba(0,0,0,0.08);
}

.terminal-bar {
    background: #1c2028;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #febc2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: #6e7681;
    margin-left: 8px;
}

.terminal-body {
    background: var(--terminal-bg);
    padding: 24px;
    overflow-x: auto;
}

.terminal-body pre {
    font-family: var(--mono);
    font-size: 0.82rem;
    line-height: 1.65;
    color: var(--terminal-text);
    white-space: pre;
    margin: 0;
}

.t-prompt { color: var(--green); font-weight: 500; }
.t-title { color: #e2b340; font-weight: 500; }
.t-label { color: #79c0ff; font-weight: 500; }
.t-text { color: var(--terminal-text); }
.t-dim { color: #6e7681; }
.t-green { color: var(--green); }
.t-yellow { color: var(--yellow); }
.t-red { color: var(--red); }
.t-cmd { color: #79c0ff; }
.t-arg { color: var(--green); }
.t-flag { color: #d2a8ff; }
.t-str { color: #a5d6ff; }

.terminal-footnote {
    font-size: 0.78rem;
    color: var(--ink-faint);
    margin-top: 14px;
    font-style: italic;
    text-align: center;
}

/* --- Findings / Features --- */
.findings-section {
    margin: 48px 0;
    padding-top: 40px;
    border-top: 1px solid var(--rule);
}

.findings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.finding {
    padding: 28px 24px;
    border-bottom: 1px solid var(--rule);
    border-right: 1px solid var(--rule);
    transition: background 0.2s;
}

.finding:hover {
    background: rgba(0,0,0,0.015);
}

.finding:nth-child(even) {
    border-right: none;
}

.finding:nth-last-child(-n+2) {
    border-bottom: none;
}

.finding-number {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-faint);
    display: block;
    margin-bottom: 10px;
    letter-spacing: 0.05em;
}

.finding h3 {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--ink);
    margin-bottom: 8px;
}

.finding p {
    font-size: 0.88rem;
    color: var(--ink-light);
    line-height: 1.6;
}

.footnote {
    font-size: 0.78rem;
    color: var(--ink-faint);
    margin-top: 20px;
    font-style: italic;
}

/* --- Mechanism / How It Works --- */
.mechanism-section {
    margin: 48px 0;
    padding-top: 40px;
    border-top: 1px solid var(--rule);
}

.mechanism-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 28px;
}

.mechanism h3 {
    font-family: var(--serif);
    font-size: 1.15rem;
    font-weight: 400;
    margin-bottom: 12px;
    color: var(--ink);
}

.mechanism p {
    font-size: 0.9rem;
    color: var(--ink-light);
    line-height: 1.65;
}

.tag {
    font-family: var(--mono);
    font-size: 0.68rem;
    background: rgba(0,0,0,0.06);
    padding: 2px 8px;
    border-radius: 3px;
    color: var(--ink-faint);
    font-weight: 400;
    vertical-align: middle;
    position: relative;
    top: -1px;
}

/* --- Install Section --- */
.install-section {
    margin: 48px 0;
    padding-top: 40px;
    border-top: 1px solid var(--rule);
}

.install-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 28px;
}

.install-option {
    border: 1px solid var(--rule);
    border-radius: 6px;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.install-option:hover {
    border-color: #aaa;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.install-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(0,0,0,0.015);
    border-bottom: 1px solid var(--rule);
}

.install-option h3 {
    font-family: var(--serif);
    font-size: 1.1rem;
    font-weight: 400;
    margin-bottom: 0;
    color: var(--ink);
}

.install-platform {
    font-size: 0.68rem;
    font-family: var(--mono);
    color: var(--ink-faint);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.install-option .code-block {
    margin: 0;
    border-radius: 0;
    padding: 16px 20px;
}

.code-block {
    display: block;
    background: var(--terminal-bg);
    color: var(--terminal-text);
    padding: 14px 16px;
    border-radius: 6px;
    font-family: var(--mono);
    font-size: 0.78rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    line-height: 1.6;
}

.install-also {
    font-size: 0.88rem;
    color: var(--ink-faint);
    margin-top: 28px;
    font-style: italic;
    text-align: center;
}

/* --- Usage --- */
.usage-section {
    margin: 48px 0;
    padding-top: 40px;
    border-top: 1px solid var(--rule);
}

.usage-examples {
    margin-top: 24px;
}

.usage-examples .code-block {
    font-size: 0.82rem;
    padding: 20px 24px;
    line-height: 1.7;
}

/* --- Closing --- */
.closing-section {
    margin: 52px 0 0;
    text-align: center;
}

.closing-rule {
    height: 1px;
    background: var(--rule);
    max-width: 200px;
    margin: 0 auto 32px;
}

.closing-section .closing-rule:last-child {
    margin: 32px auto 0;
}

.closing-quote {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-style: italic;
    line-height: 1.65;
    color: var(--ink-light);
    max-width: 540px;
    margin: 0 auto 28px;
}

.closing-cta {
    font-size: 0.85rem;
    color: var(--ink-faint);
    margin-bottom: 16px;
    font-weight: 500;
}

.closing-code {
    display: inline-block;
    max-width: 400px;
    text-align: left;
}

/* --- Footer --- */
.footer {
    border-top: 2px solid var(--ink);
    margin-top: 60px;
}

.footer-inner {
    max-width: 740px;
    margin: 0 auto;
    padding: 28px 24px 40px;
    text-align: center;
}

.footer-links {
    font-family: var(--sans);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: 16px;
}

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

.footer-tagline {
    font-family: var(--serif);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--ink-light);
    margin-bottom: 12px;
}

.footer-colophon {
    font-size: 0.7rem;
    color: var(--ink-faint);
    letter-spacing: 0.03em;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 768px) {
    html { font-size: 16px; }

    .masthead-title { font-size: 3.2rem; }
    .headline { font-size: 1.8rem; }
    .dropcap { font-size: 3.4rem; }

    .findings-grid {
        grid-template-columns: 1fr;
    }
    .finding {
        border-right: none;
    }
    .finding:nth-last-child(-n+2) {
        border-bottom: 1px solid var(--rule);
    }
    .finding:last-child {
        border-bottom: none;
    }

    .mechanism-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .pull-quote blockquote {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .masthead { padding: 20px 16px 0; }
    .page { padding: 0 16px 40px; }
    .masthead-title { font-size: 2.6rem; }
    .headline { font-size: 1.5rem; }
    .dropcap { font-size: 2.8rem; padding-right: 8px; }

    .masthead-nav {
        flex-wrap: wrap;
        gap: 8px;
    }

    .terminal-body { padding: 16px; }
    .terminal-body pre { font-size: 0.72rem; }

    .finding { padding: 20px 16px; }
    .install-option .code-block { padding: 12px 16px; }
    .install-header { padding: 10px 16px; }
    .code-block { font-size: 0.72rem; padding: 12px; }
}