/* The Shape of Thought - Site Styles */

:root {
    --bg:       #ffffff;
    --surface:  #f9f7f3;
    --raised:   #f4f1eb;
    --border:   #e4dfd5;
    --border-h: #d6cfbf;
    --text:     #1a1714;
    --dim:      #6b5e4a;
    --faint:    #a89a82;
    --accent:   #bf5b16;
    --copper:   #b87333;
    --rust:     #c45a2a;
    --gold:     #8a6c18;
    --green:    #4a7a32;
    --sans:     -apple-system, BlinkMacSystemFont, 'SF Pro Text', system-ui, sans-serif;
    --mono:     'SF Mono', 'Fira Code', ui-monospace, monospace;
    --serif:    'Georgia', 'Palatino', 'Times New Roman', serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { height: 100%; scroll-behavior: smooth; }
::selection { background: rgba(196,106,24,0.18); color: var(--gold); }

body {
    min-height: 100%;
    color: var(--text);
    font: 17px/1.8 var(--sans);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */

.container {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */

nav {
    background: rgba(255,255,255,0.95);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

nav .site-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--gold);
    text-decoration: none;
    letter-spacing: 0.02em;
}

nav .site-title:hover {
    color: var(--accent);
}

nav .nav-links {
    display: flex;
    gap: 20px;
    list-style: none;
    flex-wrap: wrap;
}

nav .nav-links a {
    color: var(--dim);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

nav .nav-links a:hover,
nav .nav-links a.active {
    color: var(--text);
}

/* Header / Hero */

.hero {
    padding: 80px 0 60px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.hero h1 {
    font-family: var(--serif);
    font-size: 2.4em;
    font-weight: 400;
    color: var(--gold);
    line-height: 1.25;
    margin-bottom: 16px;
}

.hero .subtitle {
    font-size: 1.05em;
    color: var(--dim);
    max-width: 600px;
    margin: 0 auto 24px;
    line-height: 1.6;
}

.hero .author {
    font-size: 1.1em;
    color: var(--accent);
    margin-bottom: 8px;
    font-weight: 500;
}

/* Section headings */

h2 {
    font-family: var(--serif);
    font-size: 1.6em;
    font-weight: 400;
    color: var(--gold);
    margin: 48px 0 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

h3 {
    font-size: 1.15em;
    font-weight: 600;
    color: var(--accent);
    margin: 32px 0 12px;
}

/* Paragraphs */

p {
    margin-bottom: 18px;
    line-height: 1.8;
}

/* Abstract / blockquote */

.abstract {
    background: var(--surface);
    border-left: 3px solid var(--copper);
    padding: 28px 32px;
    margin: 32px 0;
    border-radius: 0 6px 6px 0;
    font-family: var(--serif);
    font-size: 1.02em;
    line-height: 1.85;
}

.abstract p:last-child {
    margin-bottom: 0;
}

/* Equation box */

.equation-box {
    background: var(--raised);
    border: 1px solid var(--border-h);
    border-radius: 8px;
    padding: 32px;
    margin: 40px 0;
    text-align: center;
}

.equation-box .equation {
    font-family: var(--mono);
    font-size: 1.15em;
    color: var(--gold);
    margin-bottom: 20px;
    letter-spacing: 0.03em;
    word-break: break-word;
}

.equation-box .explanation {
    font-size: 0.92em;
    color: var(--dim);
    line-height: 1.7;
    max-width: 560px;
    margin: 0 auto;
}

/* Buttons */

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg);
}

.btn-primary:hover {
    background: var(--gold);
}

.btn-secondary {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-secondary:hover {
    background: var(--accent);
    color: var(--bg);
}

.btn-group {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin: 32px 0;
}

/* Links */

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--gold);
}

/* Tables */

.prediction-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.92em;
}

.prediction-table th {
    background: var(--surface);
    color: var(--gold);
    font-weight: 600;
    text-align: left;
    padding: 12px 14px;
    border-bottom: 2px solid var(--border-h);
    font-size: 0.95em;
    letter-spacing: 0.02em;
}

.prediction-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.prediction-table tr:hover td {
    background: var(--surface);
}

.prediction-table .status {
    text-align: center;
    font-size: 1.1em;
    color: var(--faint);
    min-width: 36px;
}

.prediction-table .pred-id {
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.9em;
    white-space: nowrap;
}

.prediction-table .anchor {
    color: var(--dim);
    font-size: 0.9em;
}

/* Responsive table wrapper */

.table-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 24px 0;
}

/* Page content */

.page-content {
    padding: 48px 0 80px;
}

/* Footer */

footer {
    border-top: 1px solid var(--border);
    padding: 32px 0;
    text-align: center;
    color: var(--faint);
    font-size: 0.85em;
}

footer a {
    color: var(--dim);
}

footer a:hover {
    color: var(--accent);
}

footer .license {
    margin-top: 8px;
}

/* Callout box */

.callout {
    background: var(--surface);
    border: 1px solid var(--border-h);
    border-radius: 8px;
    padding: 24px 28px;
    margin: 32px 0;
    font-size: 0.95em;
    line-height: 1.75;
}

.callout p:last-child {
    margin-bottom: 0;
}

/* Placeholder / coming soon */

.placeholder {
    text-align: center;
    padding: 80px 0;
    color: var(--dim);
}

.placeholder h2 {
    border-bottom: none;
    margin-bottom: 16px;
}

.placeholder p {
    font-size: 1.05em;
}

/* About page */

.about-section {
    margin-bottom: 40px;
}

/* Wide container for landing pages */

.container-wide {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Landing nav (uses container-wide) */

nav .container-wide {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

/* Hero - landing variant */

.hero-aside {
    font-size: 0.88em;
    color: var(--dim);
    font-style: italic;
    max-width: 640px;
    margin: 0 auto 28px;
    line-height: 1.6;
}

.hero-pitch {
    font-size: 1.1em;
    color: var(--dim);
    max-width: 660px;
    margin: 0 auto 36px;
    line-height: 1.7;
}

/* Terminal block - warm autumn tones */

.terminal {
    max-width: 620px;
    margin: 0 auto 32px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-h);
    text-align: left;
}

.terminal-bar {
    background: var(--raised);
    padding: 10px 14px;
    display: flex;
    align-items: center;
    gap: 7px;
    border-bottom: 1px solid var(--border);
}

.terminal-dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.dot-red { background: #c45a2a; }
.dot-amber { background: var(--gold); }
.dot-green { background: var(--green); }

.terminal-title {
    margin-left: 8px;
    font-size: 0.78em;
    color: var(--faint);
    font-family: var(--mono);
}

.terminal-body {
    background: var(--surface);
    padding: 20px 22px;
    font-family: var(--mono);
    font-size: 0.88em;
    line-height: 2;
    color: var(--text);
}

.terminal-prompt {
    color: var(--green);
    font-weight: 700;
    margin-right: 6px;
}

.terminal-comment {
    color: var(--faint);
}

/* Landing sections */

.landing-section {
    padding: 56px 0;
    border-bottom: 1px solid var(--border);
}

.landing-section h2 {
    margin-top: 0;
}

.section-surface {
    background: var(--surface);
}

.section-lead {
    font-size: 1.08em;
    line-height: 1.75;
    max-width: 760px;
}

/* Card grid */

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 28px;
}

.card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px 24px;
    transition: border-color 0.2s;
}

.card:hover {
    border-color: var(--copper);
}

.card h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

.card p:last-child {
    margin-bottom: 0;
}

.card-icon {
    font-size: 2em;
    margin-bottom: 12px;
}

.card-sm {
    padding: 20px 18px;
}

.card-sm h3 {
    font-size: 1em;
}

.card-sm p {
    font-size: 0.9em;
    line-height: 1.6;
}

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

/* Shapes table */

.shapes-table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.92em;
}

.shapes-table th {
    background: var(--raised);
    color: var(--gold);
    font-weight: 600;
    text-align: left;
    padding: 12px 14px;
    border-bottom: 2px solid var(--border-h);
    font-size: 0.95em;
    letter-spacing: 0.02em;
}

.shapes-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

.shapes-table tr:hover td {
    background: var(--surface);
}

.shape-num {
    color: var(--accent);
    font-family: var(--mono);
    font-weight: 700;
    text-align: center;
    min-width: 32px;
}

/* Fifth Element highlight */

.fifth-element td {
    background: var(--raised);
    font-weight: 500;
}

.fifth-element .shape-num {
    color: var(--gold);
}

.fifth-note {
    text-align: center;
    font-style: italic;
    color: var(--dim);
    max-width: 640px;
    margin: 8px auto 0;
    font-size: 0.95em;
}

/* Citation block */

.citation-block {
    font-size: 0.88em;
    color: var(--dim);
    text-align: center;
    margin-top: 24px;
    line-height: 1.6;
}

/* Footer extras */

.footer-motto {
    font-family: var(--serif);
    font-size: 1.05em;
    color: var(--gold);
    margin-bottom: 8px;
}

.footer-links {
    margin-top: 8px;
}

.footer-sub {
    margin-top: 12px;
    color: var(--faint);
    font-size: 0.9em;
}

/* Responsive */

@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

    .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .hero {
        padding: 48px 0 40px;
    }

    .hero h1 {
        font-size: 1.7em;
    }

    .hero .subtitle,
    .hero-pitch {
        font-size: 0.95em;
    }

    .abstract {
        padding: 20px 20px;
    }

    .equation-box {
        padding: 20px 16px;
    }

    .equation-box .equation {
        font-size: 0.95em;
    }

    h2 {
        font-size: 1.35em;
        margin-top: 36px;
    }

    nav .nav-links {
        gap: 14px;
    }

    .prediction-table,
    .shapes-table {
        font-size: 0.82em;
    }

    .prediction-table th,
    .prediction-table td,
    .shapes-table th,
    .shapes-table td {
        padding: 8px 10px;
    }

    .card-grid-4 {
        grid-template-columns: 1fr;
    }

    .landing-section {
        padding: 36px 0;
    }
}

@media (max-width: 400px) {
    nav .container,
    nav .container-wide {
        flex-direction: column;
        align-items: flex-start;
    }

    .hero h1 {
        font-size: 1.45em;
    }

    .btn-group {
        flex-direction: column;
        align-items: center;
    }
}