/* =========================================================
   FOUNDEV — DESIGN SYSTEM
   Learn. Build. Launch.
========================================================= */

/* 01. Design tokens */

:root {
    color-scheme: light;

    --color-bg: #F7F4EE;
    --color-surface: #FFFEFA;
    --color-surface-muted: #E1DCC9;

    --color-black: #000000;
    --color-ink: #1F150C;
    --color-brown: #412D15;
    --color-muted: #766D60;
    --color-border: rgba(31, 21, 12, 0.13);
    --color-border-strong: rgba(31, 21, 12, 0.24);

    --color-code-bg: #181713;
    --color-code-text: #F7F4EE;
    --color-code-purple: #C5A5FF;
    --color-code-orange: #F2B47D;
    --color-code-yellow: #E7D78E;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI",
        Roboto, Helvetica, Arial, sans-serif;

    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono",
        monospace;

    --container-width: 1240px;
    --page-gutter: clamp(20px, 5vw, 72px);

    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --radius-pill: 999px;

    --shadow-soft: 0 12px 40px rgba(31, 21, 12, 0.055);
    --shadow-card: 0 20px 60px rgba(31, 21, 12, 0.075);

    --ease-fluid: cubic-bezier(0.22, 1, 0.36, 1);
    --duration-fast: 180ms;
    --duration-normal: 320ms;

    --section-space: clamp(88px, 12vw, 160px);
}

/* 02. Reset */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    min-width: 320px;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body,
button,
input,
textarea,
select {
    font-family: var(--font-sans);
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

button {
    color: inherit;
}

p,
h1,
h2,
h3 {
    margin-top: 0;
}

p {
    color: var(--color-muted);
}

h1,
h2,
h3 {
    color: var(--color-ink);
    font-weight: 600;
}

::selection {
    background: var(--color-brown);
    color: var(--color-bg);
}

:focus-visible {
    outline: 3px solid var(--color-brown);
    outline-offset: 5px;
    border-radius: 4px;
}

section[id],
main[id] {
    scroll-margin-top: 96px;
}

/* Shared content width */

.site-header,
.site-footer {
    padding-inline: var(--page-gutter);
}

.welcome-section,
.project-section,
.journey-section,
.mentor-section,
.about-section,
.college-section,
.closing-section {
    width: min(
        calc(100% - var(--page-gutter) * 2),
        var(--container-width)
    );
    margin-inline: auto;
}

/* 03. Header */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    padding-block: 16px;
    background: rgba(247, 244, 238, 0.82);
    border-bottom: 1px solid rgba(31, 21, 12, 0.06);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
    backdrop-filter: blur(22px) saturate(160%);
}

.header-inner {
    width: 100%;
    max-width: 1440px;
    min-height: 48px;
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.brand-logo {
    width: 142px;
    height: auto;
    max-height: 48px;
    object-fit: contain;
    object-position: left center;
}

.main-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(18px, 2.5vw, 36px);
}

.main-nav a,
.login-link {
    color: var(--color-muted);
    font-size: 13px;
    font-weight: 500;
    transition: color var(--duration-fast) ease;
}

.main-nav a:hover,
.login-link:hover {
    color: var(--color-black);
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 22px;
    flex-shrink: 0;
}

.join-button {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 0 20px;
    border: 1px solid var(--color-ink);
    border-radius: var(--radius-pill);
    background: var(--color-ink);
    color: var(--color-bg);
    font-size: 13px;
    font-weight: 550;
    transition:
        background var(--duration-normal) var(--ease-fluid),
        color var(--duration-normal) var(--ease-fluid),
        transform var(--duration-fast) ease;
}

.join-button:hover {
    background: transparent;
    color: var(--color-ink);
}

.join-button span {
    transition: transform var(--duration-normal) var(--ease-fluid);
}

.join-button:hover span {
    transform: translate(2px, -2px);
}

.join-button:active {
    transform: scale(0.97);
}

/* 04. Hero */

.welcome-section {
    min-height: min(820px, calc(100svh - 80px));
    min-height: clamp(620px, 82svh, 820px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding-block: clamp(38px, 5vw, 68px) 28px;
}

.welcome-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.eyebrow,
.edition-label,
.section-kicker,
.closing-kicker {
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.09em;
    line-height: 1.6;
}

.eyebrow {
    color: var(--color-muted);
}

.edition-label {
    color: var(--color-brown);
}

.welcome-content {
    width: 100%;
    max-width: 900px;
    margin: auto;
    padding-block: 76px;
}

.welcome-greeting {
    margin-bottom: 24px;
    color: var(--color-muted);
    font-size: 14px;
}

.welcome-content h1 {
    max-width: 850px;
    margin-bottom: 28px;
    font-size: clamp(48px, 7.3vw, 96px);
    font-weight: 550;
    letter-spacing: -0.075em;
    line-height: 0.99;
}

.welcome-content h1 span {
    display: block;
    color: var(--color-muted);
    font-weight: 450;
}

.welcome-description {
    max-width: 510px;
    margin-bottom: 32px;
    font-size: clamp(15px, 1.5vw, 17px);
    line-height: 1.85;
}

.welcome-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 26px;
}

.primary-button {
    min-height: 54px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    padding: 0 24px;
    border: 1px solid var(--color-ink);
    border-radius: var(--radius-pill);
    background: var(--color-ink);
    color: var(--color-bg);
    font-size: 13px;
    font-weight: 550;
    transition:
        background var(--duration-normal) var(--ease-fluid),
        color var(--duration-normal) var(--ease-fluid),
        transform var(--duration-fast) ease;
}

.primary-button:hover {
    background: transparent;
    color: var(--color-ink);
}

.primary-button span {
    transition: transform var(--duration-normal) var(--ease-fluid);
}

.primary-button:hover span {
    transform: translate(3px, -3px);
}

.primary-button:active {
    transform: scale(0.97);
}

.secondary-link,
.text-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--color-ink);
    font-size: 13px;
    font-weight: 500;
}

.secondary-link span,
.text-link span {
    transition: transform var(--duration-normal) var(--ease-fluid);
}

.secondary-link:hover span {
    transform: translateY(4px);
}

.text-link:hover span {
    transform: translate(3px, -3px);
}

.welcome-note {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 38px;
    margin-bottom: 0;
    font-size: 12px;
}

.note-mark {
    color: var(--color-brown);
    font-size: 17px;
}

.welcome-footer {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 22px;
    border-top: 1px solid var(--color-border);
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.06em;
}

.footer-separator {
    color: var(--color-border-strong);
}

/* 05. Project explorer */

.project-section {
    padding-block: var(--section-space);
    border-top: 1px solid var(--color-border);
}

.section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 42px;
}

.section-heading-copy {
    max-width: 650px;
}

.section-kicker {
    display: inline-block;
    margin-bottom: 25px;
    color: var(--color-muted);
}

.section-heading h2,
.journey-header h2,
.mentor-heading h2,
.about-content h2,
.college-content h2,
.closing-section h2 {
    margin-bottom: 22px;
    font-size: clamp(36px, 5.1vw, 64px);
    font-weight: 550;
    letter-spacing: -0.065em;
    line-height: 1.08;
}

.section-heading h2 span,
.journey-header h2 span,
.mentor-heading h2 span,
.about-content h2 span,
.college-content h2 span,
.closing-section h2 span {
    color: var(--color-muted);
}

.section-heading-copy > p {
    max-width: 510px;
    margin-bottom: 0;
    font-size: 15px;
    line-height: 1.85;
}

.all-projects-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
    padding-bottom: 7px;
    color: var(--color-ink);
    font-size: 12px;
    font-weight: 550;
}

.all-projects-link span {
    transition: transform var(--duration-normal) var(--ease-fluid);
}

.all-projects-link:hover span {
    transform: translate(3px, -3px);
}

/* Project filters */

.project-filters {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 36px;
    padding-bottom: 4px;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border-strong) transparent;
}

.filter-link {
    min-height: 39px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0 16px;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    color: var(--color-muted);
    font-size: 12px;
    white-space: nowrap;
    transition:
        color var(--duration-fast) ease,
        background var(--duration-fast) ease,
        border-color var(--duration-fast) ease;
}

.filter-link:hover {
    border-color: var(--color-border);
    color: var(--color-ink);
}

.filter-link.active {
    border-color: var(--color-ink);
    background: var(--color-ink);
    color: var(--color-bg);
}

/* Project grid */

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 44px 28px;
}

.project-card {
    min-width: 0;
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(255, 254, 250, 0.48);
    transition:
        border-color var(--duration-normal) ease,
        box-shadow var(--duration-normal) ease,
        transform var(--duration-normal) var(--ease-fluid);
}

.project-card:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-soft);
    transform: translateY(-4px);
}

.project-art {
    position: relative;
    min-height: 290px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    isolation: isolate;
}

.project-art-web {
    background: #DCD7C9;
}

.project-art-ai {
    background: #D4D1C5;
}

.project-art-data {
    background: #E5DFD1;
}

.project-art-mobile {
    background: #D8D5C9;
}

.art-number {
    position: absolute;
    right: 20px;
    bottom: 17px;
    z-index: 2;
    color: rgba(31, 21, 12, 0.65);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.08em;
}

/* Code window */

.art-window {
    width: min(76%, 440px);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 13px;
    background: var(--color-code-bg);
    box-shadow: 0 24px 60px rgba(31, 21, 12, 0.2);
    transform: rotate(-2deg);
    transition: transform 500ms var(--ease-fluid);
}

.project-card:hover .art-window {
    transform: rotate(0) translateY(-3px);
}

.art-window-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #C2BDAF;
    font-family: var(--font-mono);
    font-size: 9px;
}

.art-dots {
    display: flex;
    gap: 5px;
}

.art-dots span {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #8B8477;
}

.art-code {
    padding: 25px 22px 18px;
    color: var(--color-code-text);
    font-family: var(--font-mono);
    font-size: clamp(10px, 1.1vw, 13px);
    line-height: 2.2;
    white-space: nowrap;
}

.art-code p {
    margin-bottom: 0;
    color: inherit;
}

.code-purple {
    color: var(--color-code-purple);
}

.code-orange {
    color: var(--color-code-orange);
}

.code-yellow {
    color: var(--color-code-yellow);
}

.code-indent {
    padding-left: 22px;
}

.art-status {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 13px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #C5C1B5;
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.06em;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #B8C69A;
}

/* AI artwork */

.ai-art-content,
.data-art-content,
.mobile-art-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.ai-art-content {
    width: 100%;
    gap: 32px;
}

.ai-art-label,
.ai-art-caption,
.data-art-label,
.data-art-caption,
.mobile-art-caption {
    color: var(--color-brown);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.12em;
    text-align: center;
}

.ai-art-symbol {
    display: flex;
    align-items: center;
    gap: 20px;
}

.ai-symbol-line {
    width: clamp(24px, 5vw, 60px);
    height: 1px;
    background: var(--color-brown);
    opacity: 0.55;
}

.ai-symbol-center {
    width: 112px;
    height: 112px;
    display: grid;
    place-items: center;
    border: 1px solid rgba(65, 45, 21, 0.5);
    border-radius: 50%;
    color: var(--color-brown);
    font-size: 37px;
    font-weight: 500;
    letter-spacing: -0.08em;
    transition:
        transform 500ms var(--ease-fluid),
        background var(--duration-normal) ease;
}

.project-card:hover .ai-symbol-center {
    background: rgba(255, 254, 250, 0.28);
    transform: rotate(-8deg);
}

/* Data artwork */

.data-art-content {
    width: 100%;
    gap: 26px;
}

.data-art-chart {
    width: 62%;
    height: 145px;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: clamp(8px, 2vw, 18px);
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(65, 45, 21, 0.45);
}

.data-art-chart span {
    width: clamp(10px, 2vw, 24px);
    height: var(--bar-height);
    border-radius: 4px 4px 0 0;
    background: var(--color-brown);
    opacity: 0.76;
    transform-origin: bottom;
    transition:
        transform 450ms var(--ease-fluid),
        opacity 250ms ease;
}

.project-card:hover .data-art-chart span {
    opacity: 1;
    transform: scaleY(1.04);
}

/* Mobile artwork */

.mobile-art-content {
    gap: 18px;
}

.mobile-art-phone {
    width: 142px;
    padding: 9px;
    border: 2px solid #493B29;
    border-radius: 27px;
    background: #F7F4EE;
    box-shadow: 0 20px 40px rgba(31, 21, 12, 0.16);
    transform: rotate(4deg);
    transition: transform 500ms var(--ease-fluid);
}

.project-card:hover .mobile-art-phone {
    transform: rotate(0deg) translateY(-3px);
}

.mobile-art-speaker {
    width: 36px;
    height: 4px;
    margin: 3px auto 12px;
    border-radius: var(--radius-pill);
    background: #493B29;
}

.mobile-art-screen {
    padding: 10px 7px 12px;
}

.mobile-art-greeting {
    display: block;
    margin-bottom: 15px;
    color: var(--color-ink);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: -0.04em;
}

.mobile-art-tile {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 6px;
    padding: 9px 6px;
    border: 1px solid var(--color-border);
    border-radius: 7px;
    color: var(--color-ink);
    font-size: 8px;
}

.mobile-art-tile span:first-child {
    color: var(--color-muted);
    font-family: var(--font-mono);
}

/* Project card content */

.project-card-content {
    padding: 25px clamp(20px, 3vw, 32px) 28px;
}

.project-card-meta {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.07em;
}

.project-card-content h3 {
    margin-bottom: 12px;
    font-size: clamp(21px, 2.4vw, 29px);
    font-weight: 550;
    letter-spacing: -0.055em;
    line-height: 1.25;
}

.project-card-content h3 a {
    transition: color var(--duration-fast) ease;
}

.project-card-content h3 a:hover {
    color: var(--color-muted);
}

.project-card-content > p {
    max-width: 460px;
    margin-bottom: 24px;
    font-size: 13px;
    line-height: 1.9;
}

.technology-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 27px;
}

.technology-list span {
    padding: 7px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-pill);
    color: var(--color-muted);
    font-size: 10px;
}

.card-bottom-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 17px;
    border-top: 1px solid var(--color-border);
    color: var(--color-ink);
    font-size: 12px;
    font-weight: 550;
}

.card-bottom-link span {
    font-size: 17px;
    transition: transform var(--duration-normal) var(--ease-fluid);
}

.card-bottom-link:hover span {
    transform: translateX(5px);
}

/* Project directory CTA */

.project-directory-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 50px;
    padding-top: 28px;
    border-top: 1px solid var(--color-border);
}

.project-directory-footer p {
    margin: 0;
    font-size: 13px;
}

/* 06. Journey */

.journey-section {
    padding-block: var(--section-space);
    border-top: 1px solid var(--color-border);
}

.journey-header {
    max-width: 780px;
    margin-bottom: 60px;
}

.journey-header h2 {
    max-width: 750px;
}

.journey-header > p {
    max-width: 530px;
    margin-bottom: 0;
    font-size: 15px;
    line-height: 1.9;
}

.journey-steps {
    border-top: 1px solid var(--color-border-strong);
}

.journey-step {
    display: grid;
    grid-template-columns: 70px minmax(0, 1fr) 36px;
    align-items: start;
    gap: 24px;
    padding-block: 32px;
    border-bottom: 1px solid var(--color-border);
    transition: padding var(--duration-normal) var(--ease-fluid);
}

.journey-step-number {
    padding-top: 5px;
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 12px;
}

.journey-step-body {
    max-width: 650px;
}

.journey-step-label {
    display: block;
    margin-bottom: 12px;
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.08em;
}

.journey-step-body h3 {
    margin-bottom: 10px;
    font-size: clamp(23px, 3vw, 34px);
    font-weight: 550;
    letter-spacing: -0.05em;
}

.journey-step-body p {
    max-width: 540px;
    margin-bottom: 0;
    font-size: 13px;
    line-height: 1.9;
}

.journey-step-arrow {
    padding-top: 3px;
    color: var(--color-muted);
    font-size: 20px;
    transition:
        color var(--duration-fast) ease,
        transform var(--duration-normal) var(--ease-fluid);
}

.journey-step:hover .journey-step-arrow {
    color: var(--color-ink);
    transform: translate(3px, 3px);
}

/* 07. AI mentor */

.mentor-section {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    align-items: center;
    gap: clamp(48px, 8vw, 110px);
    padding-block: var(--section-space);
    border-top: 1px solid var(--color-border);
}

.mentor-heading {
    max-width: 650px;
}

.mentor-heading h2 {
    font-size: clamp(37px, 5vw, 61px);
}

.mentor-heading > p {
    max-width: 490px;
    margin-bottom: 28px;
    font-size: 14px;
    line-height: 1.9;
}

.mentor-principles {
    border-top: 1px solid var(--color-border-strong);
}

.mentor-principle {
    display: grid;
    grid-template-columns: 35px minmax(0, 1fr);
    gap: 17px;
    padding-block: 25px;
    border-bottom: 1px solid var(--color-border);
}

.mentor-principle > span {
    padding-top: 3px;
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 10px;
}

.mentor-principle h3 {
    margin-bottom: 7px;
    font-size: 17px;
    font-weight: 550;
    letter-spacing: -0.035em;
}

.mentor-principle p {
    margin-bottom: 0;
    font-size: 12px;
    line-height: 1.8;
}

/* 08. About */

.about-section {
    padding-block: var(--section-space);
    border-top: 1px solid var(--color-border);
}

.about-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 35px;
}

.about-meta .section-kicker {
    margin-bottom: 0;
}

.about-aside {
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.08em;
}

.about-content h2 {
    max-width: 950px;
    font-size: clamp(39px, 6vw, 76px);
}

.about-content h2 span {
    display: block;
}

.about-copy {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px;
    max-width: 900px;
    margin-top: 40px;
    margin-left: auto;
}

.about-copy p {
    margin-bottom: 0;
    font-size: 14px;
    line-height: 2;
}

/* 09. Colleges */

.college-section {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 48px;
    overflow: hidden;
    padding: clamp(35px, 7vw, 80px);
    border: 1px solid rgba(255, 254, 250, 0.1);
    border-radius: var(--radius-lg);
    background: var(--color-ink);
    color: var(--color-bg);
}

.college-content {
    max-width: 700px;
}

.college-content .section-kicker {
    color: #C7BCA8;
}

.college-content h2 {
    color: var(--color-bg);
}

.college-content h2 span {
    color: #C7BCA8;
}

.college-content > p {
    max-width: 540px;
    margin-bottom: 28px;
    color: #C7BCA8;
    font-size: 14px;
    line-height: 1.9;
}

.college-content .text-link {
    color: var(--color-bg);
}

.college-side-note {
    display: flex;
    flex-direction: column;
    gap: 7px;
    flex-shrink: 0;
    padding-bottom: 6px;
    color: #C7BCA8;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.1em;
    white-space: nowrap;
}

/* 10. Closing CTA */

.closing-section {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding-block: var(--section-space);
    border-bottom: 1px solid var(--color-border);
}

.closing-kicker {
    margin-bottom: 25px;
    color: var(--color-muted);
}

.closing-section h2 {
    max-width: 800px;
    margin-bottom: 22px;
    font-size: clamp(48px, 8vw, 96px);
    line-height: 1;
}

.closing-section h2 span {
    display: block;
}

.closing-section > p {
    max-width: 490px;
    margin-bottom: 30px;
    font-size: 14px;
    line-height: 1.9;
}

.closing-button {
    min-height: 54px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
    padding: 0 25px;
    border: 1px solid var(--color-ink);
    border-radius: var(--radius-pill);
    background: var(--color-ink);
    color: var(--color-bg);
    font-size: 13px;
    font-weight: 550;
    transition:
        background var(--duration-normal) var(--ease-fluid),
        color var(--duration-normal) var(--ease-fluid),
        transform var(--duration-fast) ease;
}

.closing-button:hover {
    background: transparent;
    color: var(--color-ink);
}

.closing-button span {
    transition: transform var(--duration-normal) var(--ease-fluid);
}

.closing-button:hover span {
    transform: translate(3px, -3px);
}

.closing-button:active {
    transform: scale(0.97);
}

/* 11. Footer */

.site-footer {
    padding-top: 70px;
    padding-bottom: 25px;
}

.footer-main {
    width: 100%;
    max-width: 1440px;
    display: grid;
    grid-template-columns: 1.6fr repeat(3, minmax(0, 1fr));
    gap: 50px;
    margin-inline: auto;
    padding-bottom: 60px;
}

.footer-brand {
    max-width: 280px;
}

.footer-brand .brand {
    margin-bottom: 20px;
}

.footer-brand > p {
    margin-bottom: 20px;
    font-size: 12px;
    line-height: 1.9;
}

.footer-tagline {
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.09em;
}

.footer-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 13px;
}

.footer-column h3 {
    margin-bottom: 8px;
    color: var(--color-muted);
    font-family: var(--font-mono);
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 0.08em;
}

.footer-column a {
    color: var(--color-ink);
    font-size: 12px;
    transition: color var(--duration-fast) ease;
}

.footer-column a:hover {
    color: var(--color-muted);
}

.footer-bottom {
    width: 100%;
    max-width: 1440px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-inline: auto;
    padding-top: 22px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p,
.footer-bottom a {
    margin-bottom: 0;
    color: var(--color-muted);
    font-size: 11px;
}

.footer-bottom a {
    transition: color var(--duration-fast) ease;
}

.footer-bottom a:hover {
    color: var(--color-ink);
}

/* 12. Tablet */

@media (max-width: 1000px) {
    :root {
        --page-gutter: 32px;
    }

    .header-inner {
        gap: 22px;
    }

    .brand-logo {
        width: 125px;
    }

    .main-nav {
        gap: 18px;
    }

    .main-nav a,
    .login-link {
        font-size: 12px;
    }

    .header-buttons {
        gap: 15px;
    }

    .join-button {
        padding-inline: 15px;
    }

    .project-art {
        min-height: 255px;
    }

    .mentor-section {
        gap: 45px;
    }

    .college-section {
        align-items: flex-start;
    }

    .footer-main {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 42px;
    }
}

/* 13. Mobile */

@media (max-width: 700px) {
    :root {
        --page-gutter: 22px;
        --section-space: 88px;
        --radius-lg: 22px;
    }

    body {
        font-size: 15px;
    }

    .site-header {
        padding-block: 13px;
    }

    .header-inner {
        flex-wrap: wrap;
        gap: 14px;
    }

    .brand-logo {
        width: 116px;
        max-height: 40px;
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        gap: 23px;
        padding-top: 12px;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .main-nav::-webkit-scrollbar {
        display: none;
    }

    .main-nav a {
        flex-shrink: 0;
        font-size: 12px;
    }

    .header-buttons {
        gap: 15px;
        margin-left: auto;
    }

    .login-link {
        font-size: 12px;
    }

    .join-button {
        min-height: 39px;
        gap: 8px;
        padding-inline: 13px;
        font-size: 11px;
    }

    .welcome-section {
        min-height: 680px;
        min-height: min(760px, calc(100svh - 110px));
        padding-top: 30px;
        padding-bottom: 22px;
    }

    .welcome-meta {
        align-items: flex-start;
        gap: 14px;
    }

    .eyebrow,
    .edition-label {
        font-size: 8px;
    }

    .edition-label {
        text-align: right;
    }

    .welcome-content {
        padding-block: 55px;
    }

    .welcome-greeting {
        margin-bottom: 19px;
        font-size: 13px;
    }

    .welcome-content h1 {
        margin-bottom: 23px;
        font-size: clamp(45px, 11vw, 72px);
        letter-spacing: -0.075em;
        line-height: 1.02;
    }

    .welcome-description {
        max-width: 450px;
        margin-bottom: 27px;
        font-size: 14px;
        line-height: 1.85;
    }

    .welcome-actions {
        align-items: flex-start;
        gap: 20px;
    }

    .primary-button {
        min-height: 50px;
        gap: 15px;
        padding-inline: 18px;
        font-size: 12px;
    }

    .secondary-link {
        min-height: 50px;
        font-size: 12px;
    }

    .welcome-note {
        align-items: flex-start;
        margin-top: 28px;
        font-size: 11px;
    }

    .welcome-footer {
        gap: 9px;
        font-size: 8px;
        line-height: 1.8;
    }

    .section-heading {
        align-items: flex-start;
        flex-direction: column;
        gap: 22px;
        margin-bottom: 30px;
    }

    .section-heading .section-kicker,
    .journey-header .section-kicker,
    .mentor-heading .section-kicker {
        margin-bottom: 20px;
    }

    .section-heading h2,
    .journey-header h2,
    .mentor-heading h2,
    .about-content h2,
    .college-content h2 {
        margin-bottom: 18px;
        font-size: clamp(36px, 9vw, 53px);
    }

    .section-heading-copy > p,
    .journey-header > p {
        font-size: 13px;
    }

    .all-projects-link {
        padding-bottom: 0;
    }

    .project-filters {
        gap: 5px;
        margin-bottom: 25px;
    }

    .filter-link {
        min-height: 36px;
        padding-inline: 13px;
        font-size: 11px;
    }

    .project-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 24px;
    }

    .project-art {
        min-height: 260px;
    }

    .project-card-content {
        padding: 23px 21px 24px;
    }

    .project-card-content h3 {
        font-size: 25px;
    }

    .project-card-content > p {
        font-size: 13px;
    }

    .art-window {
        width: min(82%, 390px);
    }

    .art-code {
        padding: 20px 15px 15px;
        font-size: 10px;
    }

    .ai-symbol-center {
        width: 94px;
        height: 94px;
        font-size: 32px;
    }

    .project-directory-footer {
        align-items: flex-start;
        flex-direction: column;
        gap: 20px;
        margin-top: 35px;
    }

    .project-directory-footer p {
        font-size: 12px;
    }

    .journey-header {
        margin-bottom: 38px;
    }

    .journey-step {
        grid-template-columns: 34px minmax(0, 1fr) 20px;
        gap: 12px;
        padding-block: 25px;
    }

    .journey-step-number {
        font-size: 10px;
    }

    .journey-step-label {
        font-size: 8px;
    }

    .journey-step-body h3 {
        font-size: 23px;
    }

    .journey-step-body p {
        font-size: 12px;
    }

    .journey-step-arrow {
        font-size: 17px;
    }

    .mentor-section {
        grid-template-columns: minmax(0, 1fr);
        gap: 40px;
    }

    .mentor-heading > p {
        font-size: 13px;
    }

    .mentor-principle {
        padding-block: 22px;
    }

    .about-meta {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
        margin-bottom: 28px;
    }

    .about-content h2 {
        font-size: clamp(37px, 9vw, 54px);
    }

    .about-copy {
        grid-template-columns: minmax(0, 1fr);
        gap: 20px;
        margin-top: 28px;
        margin-left: 0;
    }

    .about-copy p {
        font-size: 13px;
        line-height: 1.9;
    }

    .college-section {
        flex-direction: column;
        gap: 35px;
        padding: 30px 24px;
    }

    .college-content > p {
        font-size: 13px;
    }

    .college-side-note {
        padding-top: 22px;
        border-top: 1px solid rgba(255, 254, 250, 0.18);
        font-size: 8px;
    }

    .closing-section h2 {
        font-size: clamp(47px, 11vw, 72px);
    }

    .closing-section > p {
        font-size: 13px;
    }

    .site-footer {
        padding-top: 50px;
        padding-bottom: 22px;
    }

    .footer-main {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 36px 24px;
        padding-bottom: 40px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .footer-brand > p {
        max-width: 260px;
    }

    .footer-column {
        gap: 12px;
    }

    .footer-column h3 {
        font-size: 8px;
    }

    .footer-column a {
        font-size: 11px;
    }

    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
        gap: 12px;
    }
}

/* 14. Small phones */

@media (max-width: 380px) {
    :root {
        --page-gutter: 17px;
    }

    .header-buttons {
        gap: 10px;
    }

    .brand-logo {
        width: 100px;
    }

    .join-button {
        padding-inline: 10px;
    }

    .welcome-content h1 {
        font-size: 43px;
    }

    .welcome-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .welcome-footer {
        column-gap: 7px;
        font-size: 7px;
    }

    .project-art {
        min-height: 225px;
    }

    .art-code {
        font-size: 9px;
    }

    .journey-step {
        grid-template-columns: 26px minmax(0, 1fr) 16px;
        gap: 9px;
    }

    .footer-main {
        gap: 30px 16px;
    }
}

/* 15. Accessibility: reduced motion */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 16. Accessibility: increased contrast */

@media (prefers-contrast: more) {
    :root {
        --color-muted: #51483D;
        --color-border: rgba(31, 21, 12, 0.35);
        --color-border-strong: rgba(31, 21, 12, 0.55);
    }

    .site-header {
        background: var(--color-bg);
        backdrop-filter: none;
    }

    .project-card {
        border-color: var(--color-border-strong);
    }
}

/* 17. Print */

@media print {
    .site-header {
        position: static;
        background: transparent;
        backdrop-filter: none;
    }

    .header-buttons,
    .main-nav,
    .welcome-actions,
    .project-filters,
    .project-directory-footer,
    .closing-button {
        display: none;
    }

    body {
        background: #FFFFFF;
        color: #000000;
    }

    .project-card,
    .college-section {
        break-inside: avoid;
        box-shadow: none;
    }
}
/* =========================================================
   MOBILE NAVIGATION — JAVASCRIPT SUPPORT
========================================================= */

.mobile-menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 6px;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    background: transparent;
    cursor: pointer;
    transition: background 180ms ease;
}

.mobile-menu-toggle:hover {
    background: var(--color-surface-muted);
}

.mobile-menu-toggle span {
    width: 16px;
    height: 1.5px;
    background: var(--color-ink);
    transition:
        transform 250ms cubic-bezier(0.22, 1, 0.36, 1);
}

@media (max-width: 700px) {
    .header-inner {
        position: relative;
    }

    .mobile-menu-toggle {
        display: flex;
        order: 4;
    }

    .main-nav {
        display: none;
    }

    .site-header.menu-open .main-nav {
        display: flex;
        order: 5;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
        padding: 12px 0 4px;
        overflow: visible;
    }

    .site-header.menu-open .main-nav a {
        padding: 13px 4px;
        border-bottom: 1px solid var(--color-border);
    }

    .site-header.menu-open .main-nav a:last-child {
        border-bottom: 0;
    }

    .site-header.menu-open .mobile-menu-toggle span:first-child {
        transform: translateY(3.75px) rotate(45deg);
    }

    .site-header.menu-open .mobile-menu-toggle span:last-child {
        transform: translateY(-3.75px) rotate(-45deg);
    }

    .site-header.menu-open .header-inner {
        row-gap: 10px;
    }
}

/* Header depth after scrolling */

.site-header.is-scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: 0 5px 24px rgba(31, 21, 12, 0.035);
}

/* Keyboard-focused project cards */

.project-card.is-focused {
    outline: 2px solid var(--color-brown);
    outline-offset: 4px;
}

/* =========================================
   INSTITUTION STUDENT AUTHENTICATION LINKS
========================================= */

.header-buttons .student-login-link,
.header-buttons .student-signup-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 40px;
    padding: 10px 14px;
    border-radius: 9px;
    font-size: 12px;
    font-weight: 650;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    transition:
        background 180ms ease,
        color 180ms ease,
        border-color 180ms ease,
        transform 180ms ease;
}

.header-buttons .student-login-link {
    color: #A9573D;
    background: #F7EAE4;
    border: 1px solid #EBD4C9;
}

.header-buttons .student-login-link:hover {
    color: #91452F;
    background: #F0DED5;
    border-color: #DDBDAF;
}

.header-buttons .student-signup-button {
    color: #FFFFFF;
    background: #A9573D;
    border: 1px solid #A9573D;
}

.header-buttons .student-signup-button:hover {
    color: #FFFFFF;
    background: #91452F;
    border-color: #91452F;
    transform: translateY(-1px);
}

.header-buttons .student-signup-button span {
    font-size: 15px;
}

/* Keep the header usable on smaller screens */
@media (max-width: 1100px) {
    .header-buttons .student-login-link,
    .header-buttons .student-signup-button {
        padding: 9px 10px;
        font-size: 11px;
    }
}

@media (max-width: 760px) {
    .header-buttons .student-login-link,
    .header-buttons .student-signup-button {
        display: none;
    }
}