/* ================================================================
   Joinery — Style
   Practical Typography energy. Content is the design.
   ================================================================ */

:root {
    --color-bg: #F8F6F2;
    --color-bg-alt: #F0EDE7;
    --color-text: #2A2725;
    --color-text-mid: #555;
    --color-text-light: #888;
    --color-accent: #C45A2D;
    --color-accent-hover: #A84920;
    --color-rule: #DDD9D1;
    --color-white: #F8F6F2;
    --color-dark: #1A1918;

    --font-heading: 'Archivo', -apple-system, sans-serif;
    --font-body: 'Figtree', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Consolas', monospace;

    --grid-columns: 12;
    --grid-gutter: 20px;
    --grid-margin: 40px;
    --grid-max: 1200px;

    --measure: 36rem;
    --measure-wide: 48rem;

    --space-xs: 0.5rem;
    --space-s: 1rem;
    --space-m: 2rem;
    --space-l: 4rem;
    --space-xl: 6rem;
    --space-xxl: 8rem;
}

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

html {
    font-size: 15px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}


/* ================================================================
   Grid — 12-column fluid, centered, 1200px max
   Usage: class="grid" on container, then children use grid-column
   e.g. grid-column: 1 / 7 (spans 6 of 12)
   e.g. grid-column: 3 / 11 (spans 8, offset by 2)
   ================================================================ */

.grid {
    display: grid;
    grid-template-columns: repeat(var(--grid-columns), 1fr);
    gap: 0 var(--grid-gutter);
    max-width: var(--grid-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--grid-margin);
    padding-right: var(--grid-margin);
}

/* Common column spans */
.col-full   { grid-column: 1 / -1; }
.col-10     { grid-column: 2 / 12; }
.col-8      { grid-column: 3 / 11; }
.col-8-left { grid-column: 1 / 9; }
.col-6      { grid-column: 1 / 7; }
.col-6-right { grid-column: 7 / 13; }
.col-4      { grid-column: 1 / 5; }
.col-4-mid  { grid-column: 5 / 9; }
.col-4-right { grid-column: 9 / 13; }

/* Debug: make grid visible (add class="grid debug" to see columns) */
.grid.debug {
    background-image: repeating-linear-gradient(
        to right,
        rgba(200, 0, 0, 0.05) 0,
        rgba(200, 0, 0, 0.05) calc((100% - (var(--grid-columns) - 1) * var(--grid-gutter)) / var(--grid-columns)),
        transparent calc((100% - (var(--grid-columns) - 1) * var(--grid-gutter)) / var(--grid-columns)),
        transparent calc((100% - (var(--grid-columns) - 1) * var(--grid-gutter)) / var(--grid-columns) + var(--grid-gutter))
    );
}

@media (max-width: 768px) {
    :root {
        --grid-margin: 20px;
        --grid-gutter: 16px;
    }

    .col-10,
    .col-8,
    .col-8-left,
    .col-6,
    .col-6-right,
    .col-4,
    .col-4-mid,
    .col-4-right { grid-column: 1 / -1; }
}


/* ================================================================
   Nav
   ================================================================ */

.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-rule);
    padding: 0 var(--space-m);
    transition: box-shadow 0.2s ease;
}

.nav.scrolled {
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.05);
}

.nav-inner {
    max-width: var(--measure-wide);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 3.2rem;
}

.nav-mark {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
}

.nav-mark img {
    width: 20px;
    height: 20px;
}

.nav-mark span {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 400;
    text-decoration: none;
    color: var(--color-text-light);
    transition: color 0.15s ease;
}

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

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


/* ================================================================
   Sections — shared rhythm
   ================================================================ */

.section {
    padding: var(--space-l) var(--space-m);
}

.section-inner {
    max-width: var(--measure);
    margin: 0 auto;
}

.section-inner.wide {
    max-width: var(--measure-wide);
}

hr.rule {
    border: none;
    border-top: 1px solid var(--color-rule);
    margin: 0;
}


/* ================================================================
   Typography
   Size hierarchy: 48 / 36 / 24 / 18 / 16
   ================================================================ */

h1 {
    font-family: var(--font-heading);
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: var(--color-text);
}

h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.015em;
    color: var(--color-text);
}

h3 {
    font-family: var(--font-heading);
    font-size: 1.12rem;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
    color: var(--color-text);
}

p {
    max-width: var(--measure);
}

.mono {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.01em;
}


/* ================================================================
   Hero
   ================================================================ */

.hero {
    padding: var(--space-xl) var(--space-m) var(--space-m);
}

.hero-inner {
    max-width: var(--measure);
    margin: 0 auto;
}

.hero h1 {
    max-width: 14em;
    margin-bottom: var(--space-m);
}

.hero-sub {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text-mid);
    max-width: 32em;
}


/* ================================================================
   Problem
   ================================================================ */

.problem {
    padding: var(--space-s) var(--space-m) var(--space-l);
}

.problem-text {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--color-text);
    max-width: 30em;
}

.problem-text + .problem-text {
    margin-top: var(--space-s);
}


/* ================================================================
   Methodology
   ================================================================ */

.methodology {
    padding: var(--space-l) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.methodology .section-inner h2 {
    margin-bottom: var(--space-m);
}

.methodology .section-inner p {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--color-text-mid);
}

.methodology .section-inner p + p {
    margin-top: var(--space-s);
}


/* ================================================================
   Curriculum — Table of contents style
   ================================================================ */

.curriculum {
    padding: var(--space-l) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.curriculum h2 {
    margin-bottom: 0.5rem;
}

.curriculum > .section-inner > p {
    font-size: 1.05rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-l);
}

.domain-list {
    list-style: none;
    border-top: 1px solid var(--color-rule);
}

.domain-item {
    display: flex;
    gap: var(--space-m);
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-rule);
    align-items: baseline;
}

.domain-number {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    flex-shrink: 0;
    width: 2rem;
    padding-top: 0.15rem;
}

.domain-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.domain-content p {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--color-text-mid);
}

.domain-note {
    margin-top: var(--space-m);
    font-size: 0.9rem;
    color: var(--color-text-mid);
    line-height: 1.6;
}


/* ================================================================
   Tracks
   ================================================================ */

.tracks {
    padding: var(--space-l) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.tracks h2 {
    margin-bottom: var(--space-l);
}

.track-list {
    display: flex;
    gap: var(--space-l);
}

.track {
    flex: 1;
    border-top: 2px solid var(--color-text);
    padding-top: var(--space-m);
}

.track h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.track-who {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
}

.track p:last-child {
    font-size: 0.92rem;
    line-height: 1.65;
    color: var(--color-text-mid);
}


/* ================================================================
   Enrolling CTA
   ================================================================ */

.enrolling {
    padding: var(--space-l) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.enrolling h2 {
    margin-bottom: 0.5rem;
}

.enrolling p {
    font-size: 1.05rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-m);
}

.text-link {
    display: block;
    text-align: right;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s ease;
}

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

.text-link::after {
    content: ' \2192';
}

.status-indicator {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-mid);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.6;
}


/* ================================================================
   Signup (dark section)
   ================================================================ */

.signup {
    background-color: var(--color-dark);
    color: var(--color-bg);
    padding: var(--space-xl) var(--space-m);
}

.signup-inner {
    max-width: var(--measure);
    margin: 0 auto;
    text-align: center;
}

.signup h2 {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
    color: var(--color-bg);
}

.signup .subtitle {
    font-size: 1rem;
    color: #999;
    margin-bottom: var(--space-l);
}

.signup-form {
    display: flex;
    gap: 0.75rem;
    max-width: 26rem;
    margin: 0 auto;
}

.signup-input {
    flex: 1;
    padding: 0.85rem 1.2rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    border: 1px solid #444;
    border-radius: 2px;
    background: transparent;
    color: var(--color-bg);
    outline: none;
    transition: border-color 0.15s ease;
}

.signup-input::placeholder {
    color: #666;
}

.signup-input:focus {
    border-color: var(--color-accent);
}

.signup-button {
    padding: 0.85rem 1.8rem;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 2px;
    cursor: pointer;
    transition: background 0.15s ease;
    white-space: nowrap;
}

.signup-button:hover {
    background: var(--color-accent-hover);
}


/* ================================================================
   Footer
   ================================================================ */

.footer {
    padding: 2.5rem var(--space-m);
    text-align: center;
    background-color: var(--color-dark);
    border-top: 1px solid #2A2928;
}

.footer p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin: 0 auto;
}

.footer a {
    color: #999;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.15s ease;
}

.footer a:hover {
    border-bottom-color: #999;
}


/* ================================================================
   Courses page
   ================================================================ */

.course-entry {
    border-top: 1px solid var(--color-rule);
    padding-top: var(--space-m);
}

.course-entry h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.course-meta {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-s);
}

.course-entry p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-mid);
    margin-bottom: var(--space-m);
}


/* ================================================================
   Foundations course page
   ================================================================ */

.course-header {
    padding: var(--space-xl) var(--space-m) var(--space-l);
}

.course-header .section-inner h1 {
    font-size: clamp(2rem, 4.5vw, 2.5rem);
    margin-bottom: 0.5rem;
}

.course-header .course-meta {
    margin-bottom: var(--space-m);
}

.course-header p {
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--color-text-mid);
}

.week-breakdown {
    padding: var(--space-xl) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.week {
    margin-bottom: var(--space-l);
}

.week:last-child {
    margin-bottom: 0;
}

.week-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.week h3 {
    font-size: 1.12rem;
    margin-bottom: 0.35rem;
}

.week-pedagogy {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    font-style: italic;
    margin-bottom: 0.75rem;
}

.week p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--color-text-mid);
    margin-bottom: 0.75rem;
}

.week .deliverable {
    font-size: 0.9rem;
    color: var(--color-text);
}

.week .deliverable strong {
    font-weight: 600;
}


/* ================================================================
   Artifact comparison
   ================================================================ */

.artifact {
    padding: var(--space-xl) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.artifact h2 {
    margin-bottom: 0.5rem;
}

.artifact > .section-inner > p {
    font-size: 1.05rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-l);
}

.artifact-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background-color: var(--color-rule);
    border: 1px solid var(--color-rule);
}

.artifact-side {
    background: var(--color-bg);
    padding: 1.75rem;
}

.artifact-side.alt {
    background: var(--color-bg-alt);
}

.artifact-side-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-text-light);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.artifact-side h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.artifact-excerpt {
    font-size: 0.85rem;
    line-height: 1.65;
    color: var(--color-text-mid);
}

.artifact-excerpt em {
    color: var(--color-accent);
    font-style: normal;
    font-weight: 500;
}

.artifact-note {
    grid-column: 1 / -1;
    background: var(--color-dark);
    color: var(--color-bg);
    padding: 1.25rem 1.75rem;
    font-size: 0.88rem;
    line-height: 1.6;
}

.artifact-context {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}


/* ================================================================
   What's included (simple list)
   ================================================================ */

.includes-list {
    list-style: none;
    max-width: var(--measure);
}

.includes-list li {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-text-mid);
    padding: 0.4rem 0;
    padding-left: 1.2rem;
    position: relative;
}

.includes-list li::before {
    content: '\2013';
    position: absolute;
    left: 0;
    color: var(--color-text-light);
}


/* ================================================================
   Pricing CTA
   ================================================================ */

.pricing {
    padding: var(--space-xl) var(--space-m);
    border-top: 1px solid var(--color-rule);
    text-align: center;
}

.pricing h2 {
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.pricing p {
    font-size: 1.05rem;
    color: var(--color-text-mid);
    margin: 0 auto var(--space-m);
}

.button {
    display: inline-block;
    padding: 0.9rem 2.2rem;
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-decoration: none;
    background: var(--color-accent);
    color: var(--color-white);
    border-radius: 2px;
    transition: background 0.15s ease;
}

.button:hover {
    background: var(--color-accent-hover);
}


/* ================================================================
   Research page
   ================================================================ */

.paper-list {
    list-style: none;
    border-top: 1px solid var(--color-rule);
}

.paper {
    display: block;
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--color-rule);
    text-decoration: none;
    color: var(--color-text);
    transition: color 0.15s ease;
}

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

.paper-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 500;
    display: block;
}

.paper-subtitle {
    display: block;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 400;
    color: var(--color-text-mid);
    margin-top: 0.2rem;
    line-height: 1.5;
}

.paper:hover .paper-subtitle {
    color: var(--color-accent);
}


/* ================================================================
   Reading / essays section
   ================================================================ */

.reading {
    padding: var(--space-xl) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.reading h2 {
    margin-bottom: var(--space-m);
}

.essay-entry {
    border-top: 1px solid var(--color-rule);
    padding-top: var(--space-m);
}

.essay-entry-label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.essay-entry a {
    text-decoration: none;
    color: var(--color-text);
    transition: color 0.15s ease;
}

.essay-entry a:hover {
    color: var(--color-accent);
}

.essay-entry-title {
    font-family: var(--font-heading);
    font-size: 1.12rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.essay-entry-desc {
    font-size: 0.92rem;
    color: var(--color-text-mid);
    line-height: 1.6;
}

.essay-entry a:hover .essay-entry-desc {
    color: var(--color-accent);
}


/* ================================================================
   About / Founder
   ================================================================ */

.founder {
    padding: var(--space-xl) var(--space-m);
}

.founder h2 {
    margin-bottom: var(--space-l);
}

.founder h2 a {
    color: inherit;
    text-decoration: none;
    border-bottom: 2px solid var(--color-rule);
    transition: border-color 0.15s ease;
}

.founder h2 a:hover {
    border-color: var(--color-text);
}

.founder-bio {
    margin-bottom: var(--space-l);
}

.founder-photo {
    float: left;
    width: 180px;
    margin-right: var(--space-s);
    margin-bottom: var(--space-s);
}

.founder-photo img[src="assets/peter-salvato.jpg"] {
    top: 0.5rem;
    position: relative;
    left: 0.25rem;
    transform: rotate(-0.5deg) scale(1.05);
}

.founder-photo img {
    width: 100%;
    display: block;
}

.founder-text {
    flex: 1;
}

.founder-text p {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text-mid);
}

.founder-text p + p {
    margin-top: var(--space-s);
}

.founder-creds {
    border-top: 1px solid var(--color-rule);
    padding-top: var(--space-m);
}

.founder-cred {
    padding: 0.75rem 0;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--color-text-mid);
}

.founder-cred + .founder-cred {
    border-top: 1px solid var(--color-rule);
}

.founder-cred strong {
    display: inline;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin-right: 0.5rem;
}


/* ================================================================
   Essay article page
   ================================================================ */

.essay-article {
    max-width: var(--measure);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-m) var(--space-xxl);
}

.essay-article .essay-breadcrumb {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    margin-bottom: var(--space-m);
}

.essay-article .essay-breadcrumb a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: color 0.15s ease;
}

.essay-article .essay-breadcrumb a:hover {
    color: var(--color-accent);
}

.essay-article h1 {
    font-size: clamp(2rem, 4.5vw, 2.6rem);
    margin-bottom: 0.5rem;
}

.essay-article .essay-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-l);
    line-height: 1.6;
}

.essay-article p {
    margin-bottom: 1.4rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

.essay-article h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-top: var(--space-l);
    margin-bottom: var(--space-s);
    letter-spacing: -0.01em;
}

.essay-article .separator {
    display: block;
    text-align: center;
    color: var(--color-rule);
    margin: var(--space-l) 0;
    font-size: 1rem;
    letter-spacing: 0.5em;
}

.essay-cta {
    margin-top: var(--space-l);
    padding-top: var(--space-l);
    border-top: 1px solid var(--color-rule);
}

.essay-cta h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.essay-cta p {
    font-size: 0.95rem;
    color: var(--color-text-mid);
    margin-bottom: var(--space-m);
}

.essay-cta form {
    display: flex;
    gap: 0.75rem;
    max-width: 24rem;
}

.essay-cta input {
    flex: 1;
    padding: 0.75rem 1rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    border: 1px solid var(--color-rule);
    border-radius: 2px;
    background: var(--color-white);
    color: var(--color-text);
    outline: none;
    transition: border-color 0.15s ease;
}

.essay-cta input:focus {
    border-color: var(--color-accent);
}

.essay-cta button {
    padding: 0.75rem 1.5rem;
    font-family: var(--font-heading);
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    background: var(--color-accent);
    color: var(--color-white);
    border: none;
    border-radius: 2px;
    cursor: pointer;
    transition: background 0.15s ease;
}

.essay-cta button:hover {
    background: var(--color-accent-hover);
}

.essay-footer {
    margin-top: var(--space-l);
    padding-top: var(--space-m);
    border-top: 1px solid var(--color-rule);
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.essay-footer a {
    color: var(--color-text-mid);
    text-decoration: none;
    transition: color 0.15s ease;
}

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


/* ================================================================
   Ladder rows (courses page practitioner list)
   ================================================================ */

.ladder-row {
    display: flex;
    gap: var(--space-m);
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-rule);
    align-items: baseline;
}

.ladder-num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-light);
    flex-shrink: 0;
    width: 2rem;
}

.ladder-body {
    flex: 1;
}

.ladder-body strong {
    font-size: 1rem;
}

.ladder-desc {
    font-size: 0.92rem;
    color: var(--color-text-mid);
}

.ladder-link {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-decoration: none;
    flex-shrink: 0;
    border-bottom: 1px solid var(--color-rule);
}

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


.ladder-destination {
    display: flex;
    gap: var(--space-m);
    padding: 1rem 0;
    border-top: 2px solid var(--color-text-mid);
    border-bottom: 1px solid var(--color-rule);
    background: var(--color-dark);
    padding: 1.25rem 1.75rem;
    margin-top: 1px;
    color: var(--color-bg);
    align-items: baseline;
}

.ladder-destination-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-bg);
    opacity: 0.5;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    display: block;
    margin-bottom: 0.4rem;
}

.ladder-destination-body {
    flex: 1;
}

.ladder-destination-body strong {
    font-size: 1rem;
    color: var(--color-bg);
}

.ladder-destination .ladder-desc {
    color: var(--color-bg);
    opacity: 0.75;
}

.ladder-destination .ladder-link {
    color: var(--color-bg);
    border-bottom-color: rgba(255,255,255,0.3);
    opacity: 0.75;
}

.ladder-destination .ladder-link:hover {
    opacity: 1;
    color: var(--color-bg);
    border-bottom-color: var(--color-bg);
}


/* ================================================================
   Future tracks (courses page)
   ================================================================ */

.future-tracks {
    display: flex;
    gap: var(--space-l);
}

.future-track {
    flex: 1;
    border-top: 2px solid var(--color-rule);
    padding-top: var(--space-m);
}

.future-track h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}

.future-track .course-meta {
    margin-bottom: 0.75rem;
}

.future-track p {
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--color-text-mid);
    margin-bottom: 0.75rem;
}


/* ================================================================
   Prelaunch banner
   ================================================================ */

.prelaunch-banner {
    background: var(--color-accent);
    color: #fff;
    text-align: center;
    padding: 0.6rem var(--space-m);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.04em;
}

.prelaunch-banner a {
    color: #fff;
    text-decoration: underline;
}

.prelaunch-banner a:hover {
    text-decoration: none;
}


/* ================================================================
   Lead magnet form (light background variant)
   ================================================================ */

.lead-magnet-form .signup-input {
    border-color: var(--color-rule);
    background: var(--color-bg-alt);
    color: var(--color-text);
}

.lead-magnet-form .signup-input::placeholder {
    color: var(--color-text-light);
}


/* ================================================================
   Methodology lean (hook + domain index)
   ================================================================ */

.methodology-lean {
    padding: var(--space-l) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.methodology-lean .section-inner > p {
    font-size: 1.05rem;
    color: var(--color-text-mid);
    line-height: 1.75;
    margin-bottom: var(--space-m);
    max-width: var(--measure-wide);
}

.methodology-lean .section-inner {
    max-width: var(--measure-wide);
}

.domain-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--color-rule);
    border-left: 1px solid var(--color-rule);
    margin: var(--space-m) 0;
}

.domain-grid-item {
    border-right: 1px solid var(--color-rule);
    border-bottom: 1px solid var(--color-rule);
    padding: var(--space-s);
}

.domain-num {
    display: block;
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-text-light);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.domain-name {
    display: block;
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.3;
}

.domain-desc {
    display: block;
    font-size: 0.82rem;
    color: var(--color-text-mid);
    line-height: 1.5;
    margin-top: 0.35rem;
}

.domain-destination {
    grid-column: 1 / -1;
    border-top: 2px solid var(--color-text-mid);
    background: var(--color-bg-alt);
}


/* ================================================================
   Card sections
   ================================================================ */

.card-section {
    padding: var(--space-l) var(--space-m);
}

.page-card {
    border: 1px solid var(--color-rule);
    background: var(--color-bg-alt);
    padding: var(--space-m);
    max-width: var(--measure);
    margin: 0 auto;
}

.page-card h2 {
    margin-bottom: var(--space-s);
}

.page-card p {
    font-size: 1.05rem;
    color: var(--color-text-mid);
    line-height: 1.7;
}

.page-card p + p {
    margin-top: 0.75rem;
}

.page-card .card-note {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.page-card .button {
    margin-top: var(--space-m);
}

.page-card .signup-form {
    margin: var(--space-m) 0 0;
}

.page-card .signup-input {
    border-color: var(--color-rule);
    background: var(--color-bg);
    color: var(--color-text);
}

.page-card .signup-input::placeholder {
    color: var(--color-text-light);
}

/* Credibility strip */
.cred-section {
    padding: var(--space-l) var(--space-m);
    border-top: 1px solid var(--color-rule);
}

.cred-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-m);
    max-width: var(--measure-wide);
    margin: 0 auto;
}

.cred-item {
    border-top: 1px solid var(--color-rule);
    padding-top: var(--space-s);
}

.cred-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}

.cred-value {
    font-size: 0.88rem;
    color: var(--color-text-mid);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.cred-link {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--color-text-light);
    text-decoration: none;
    border-bottom: 1px solid var(--color-rule);
    transition: color 0.15s ease, border-color 0.15s ease;
}

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


/* ================================================================
   Diagram placeholders
   ================================================================ */

.diagram-placeholder {
    border: 1px solid var(--color-rule);
    background: var(--color-bg-alt);
    padding: var(--space-l) var(--space-m);
    text-align: center;
    margin: var(--space-m) 0;
}

.diagram-placeholder-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 0.5rem;
}

.diagram-placeholder-title {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-mid);
}


/* ================================================================
   Focus states (accessibility)
   ================================================================ */

a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.nav-links a:focus-visible {
    outline-offset: 4px;
}


/* ================================================================
   Course entry refinements
   ================================================================ */

.course-entry + .course-entry {
    margin-top: var(--space-l);
}

.course-entry h3 {
    transition: color 0.15s ease;
}

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

.course-entry .course-meta + .course-meta {
    margin-top: 0.25rem;
}


/* ================================================================
   Section transitions (subtle)
   ================================================================ */

.section + .section,
.methodology + .curriculum,
.curriculum + .tracks,
.tracks + .enrolling {
    border-top: 1px solid var(--color-rule);
}


/* ================================================================
   Responsive — Tablet (768px)
   ================================================================ */

@media (max-width: 768px) {
    :root {
        --space-xl: 4rem;
        --space-xxl: 6rem;
    }

    .track-list {
        flex-direction: column;
        gap: var(--space-m);
    }

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

    .founder-photo {
        width: 140px;
    }
}


/* ================================================================
   Responsive — Mobile (640px)
   ================================================================ */

@media (max-width: 640px) {
    html { font-size: 16px; }

    .hero {
        padding: var(--space-l) 1.5rem var(--space-xl);
    }

    h1 {
        font-size: clamp(2rem, 8vw, 2.8rem);
    }

    .section {
        padding: var(--space-l) 1.5rem;
    }

    .problem,
    .methodology,
    .curriculum,
    .tracks,
    .enrolling,
    .artifact,
    .reading,
    .founder,
    .week-breakdown {
        padding: var(--space-m) 1.5rem;
    }

    .signup {
        padding: var(--space-l) 1.5rem;
    }

    .course-header {
        padding: var(--space-l) 1.5rem var(--space-m);
    }

    .pricing {
        padding: var(--space-l) 1.5rem;
    }

    .ladder-row {
        flex-direction: column;
        gap: 0.25rem;
    }

    .ladder-num {
        width: auto;
    }

    .ladder-link,
    .ladder-row .status-indicator {
        margin-top: 0.25rem;
    }

    .future-tracks {
        flex-direction: column;
        gap: var(--space-m);
    }

    .domain-grid {
        grid-template-columns: 1fr;
    }

    .cred-grid {
        grid-template-columns: 1fr;
    }

    .signup-form {
        flex-direction: column;
    }

    .signup-button {
        padding: 1rem var(--space-m);
    }

    .artifact-comparison {
        grid-template-columns: 1fr;
    }

    .nav-links {
        gap: 1.25rem;
    }

    .nav-links a {
        font-size: 0.75rem;
    }

    .essay-article {
        padding: var(--space-l) 1.5rem var(--space-xl);
    }

    .essay-cta form {
        flex-direction: column;
    }
}