:root {
    --plan-paper: #f7f0e3;
    --plan-surface: #fffaf1;
    --plan-ink: #152238;
    --plan-muted: #4b5869;
    --plan-coral: #e85d4a;
    --plan-coral-dark: #a93428;
    --plan-sun: #f6c945;
    --plan-cobalt: #2657c7;
    --plan-mint: #b9d9c7;
    --plan-line: rgba(21, 34, 56, 0.24);
}

body.idea-page {
    min-width: 0;
    overflow-x: hidden;
    color: var(--plan-ink);
    background:
        linear-gradient(rgba(21, 34, 56, 0.035) 1px, transparent 1px),
        var(--plan-paper);
    background-size: 100% 32px;
}

.idea-page a,
.idea-page button,
.idea-page input {
    min-width: 0;
}

.idea-page .plan-shell {
    width: min(calc(100% - 2rem), 1120px);
    margin: 0 auto;
}

.plan-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 3px solid var(--plan-ink);
    background: rgba(247, 240, 227, 0.96);
    backdrop-filter: blur(10px);
}

.plan-header-inner {
    width: min(calc(100% - 2rem), 1120px);
    min-height: 72px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.plan-logo {
    color: var(--plan-ink);
    font-family: var(--font-heading, sans-serif);
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    text-decoration: none;
    white-space: nowrap;
}

.plan-nav,
.footer-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 0.45rem 1rem;
}

.plan-nav a,
.footer-nav a {
    color: var(--plan-ink);
    font-size: 0.82rem;
    font-weight: 800;
    text-decoration: none;
}

.plan-nav a:hover,
.footer-nav a:hover {
    color: var(--plan-coral-dark);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.plan-main {
    padding: 1.25rem 0 4rem;
}

.breadcrumbs {
    padding: 0.2rem 0 1.25rem;
    color: var(--plan-muted);
    font-size: 0.84rem;
}

.breadcrumbs ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.breadcrumbs li + li::before {
    content: "/";
    margin-right: 0.45rem;
    color: var(--plan-coral);
    font-weight: 900;
}

.breadcrumbs a {
    color: var(--plan-cobalt);
    font-weight: 700;
}

.breadcrumbs span[aria-current="page"] {
    color: var(--plan-muted);
}

.plan-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 2rem;
    align-items: end;
    padding: clamp(1.5rem, 4vw, 3.25rem);
    border: 3px solid var(--plan-ink);
    background: var(--plan-surface);
    box-shadow: 8px 8px 0 var(--plan-ink);
    overflow: hidden;
}

.plan-hero::after {
    content: "";
    position: absolute;
    right: -70px;
    top: -90px;
    width: 220px;
    height: 220px;
    border: 2px solid var(--plan-coral);
    border-radius: 50%;
    opacity: 0.2;
    pointer-events: none;
}

.plan-hero-copy,
.plan-stamp {
    position: relative;
    z-index: 1;
}

.plan-kicker,
.section-label,
.related-kicker {
    display: block;
    color: var(--plan-coral-dark);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.13em;
    line-height: 1.2;
    text-transform: uppercase;
}

.plan-hero h1 {
    max-width: 820px;
    margin: 0.55rem 0 0.8rem;
    font-family: var(--font-heading, sans-serif);
    font-size: clamp(2.25rem, 7vw, 5.8rem);
    letter-spacing: -0.075em;
    line-height: 0.92;
    overflow-wrap: anywhere;
}

.plan-lede {
    max-width: 760px;
    color: var(--plan-muted);
    font-size: clamp(1rem, 2vw, 1.2rem);
    line-height: 1.55;
}

.plan-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 1.3rem;
}

.plan-tags span {
    padding: 0.3rem 0.55rem;
    border: 1px solid var(--plan-ink);
    background: var(--plan-sun);
    color: var(--plan-ink);
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.plan-stamp {
    display: grid;
    align-content: center;
    justify-items: center;
    min-height: 180px;
    padding: 1rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-coral);
    color: var(--plan-ink);
    text-align: center;
    transform: rotate(2deg);
}

.plan-stamp strong {
    margin-top: 0.6rem;
    font-size: 1rem;
    line-height: 1.1;
}

.plan-stamp > span:last-child {
    font-size: 0.8rem;
    font-weight: 800;
}

.stamp-mark {
    font-family: var(--font-heading, sans-serif);
    font-size: 1.4rem;
    font-weight: 900;
    letter-spacing: 0.03em;
    line-height: 0.9;
}

.fit-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    margin: 1.6rem 0 1rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-mint);
}

.fit-strip > div {
    min-width: 0;
    padding: 0.85rem 1rem;
    border-right: 1px solid var(--plan-line);
}

.fit-strip > div:last-child {
    border-right: 0;
}

.fit-strip span,
.fit-strip small {
    display: block;
    color: var(--plan-muted);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    line-height: 1.2;
    text-transform: uppercase;
}

.fit-strip strong {
    display: block;
    margin-top: 0.28rem;
    font-size: 0.98rem;
    line-height: 1.15;
    overflow-wrap: anywhere;
}

.fit-strip small {
    margin-top: 0.25rem;
    color: var(--plan-ink);
    font-size: 0.65rem;
    letter-spacing: 0;
    text-transform: none;
}

.plan-actions {
    position: sticky;
    top: 84px;
    z-index: 40;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-bottom: 2.25rem;
    padding: 0.65rem;
    border: 2px solid var(--plan-ink);
    background: rgba(255, 250, 241, 0.96);
    box-shadow: 4px 4px 0 var(--plan-ink);
    backdrop-filter: blur(8px);
}

.action-button {
    min-height: 42px;
    padding: 0.58rem 0.8rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-surface);
    color: var(--plan-ink);
    font-size: 0.78rem;
    font-weight: 900;
    text-decoration: none;
    box-shadow: 3px 3px 0 var(--plan-ink);
    transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.action-button:hover,
.action-button:focus-visible {
    background: var(--plan-sun);
    transform: translate(1px, 1px);
    box-shadow: 2px 2px 0 var(--plan-ink);
}

.action-primary {
    background: var(--plan-coral);
}

.action-status {
    flex: 1 1 12rem;
    min-width: 0;
    color: var(--plan-muted);
    font-size: 0.78rem;
    line-height: 1.3;
}

.plan-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 1.5rem;
    align-items: start;
}

.plan-primary {
    display: grid;
    gap: 1.5rem;
    min-width: 0;
}

.plan-section,
.sidebar-card {
    border: 2px solid var(--plan-ink);
    background: var(--plan-surface);
}

.plan-section {
    min-width: 0;
    padding: clamp(1.2rem, 3vw, 2rem);
}

.section-heading {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    margin-bottom: 1rem;
}

.section-heading h2 {
    margin-top: 0.28rem;
    font-family: var(--font-heading, sans-serif);
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    letter-spacing: -0.055em;
    line-height: 1;
    overflow-wrap: anywhere;
}

.section-index {
    display: inline-grid;
    flex: 0 0 auto;
    place-items: center;
    width: 2.2rem;
    height: 2.2rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-sun);
    font-family: var(--font-heading, sans-serif);
    font-size: 0.85rem;
    font-weight: 900;
}

.section-intro {
    max-width: 680px;
    margin: -0.25rem 0 1.25rem 3.05rem;
    color: var(--plan-muted);
    font-size: 0.92rem;
}

.checklist {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    margin: 0 0 0 3.05rem;
    padding: 0;
    list-style: none;
}

.checklist-item,
.checklist-item label {
    min-width: 0;
}

.checklist-item label {
    display: flex;
    align-items: flex-start;
    gap: 0.55rem;
    height: 100%;
    padding: 0.7rem;
    border: 1px solid var(--plan-line);
    background: #fffdf8;
    font-size: 0.9rem;
    line-height: 1.35;
    cursor: pointer;
}

.checklist-item input {
    flex: 0 0 auto;
    width: 1rem;
    height: 1rem;
    margin: 0.1rem 0 0;
    accent-color: var(--plan-coral-dark);
}

.checklist-item label:has(input:checked) {
    background: var(--plan-mint);
    text-decoration: line-through;
    text-decoration-thickness: 1px;
}

.steps-list,
.run-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.steps-list {
    display: grid;
    gap: 1rem;
    margin-left: 3.05rem;
}

.plan-step {
    display: grid;
    grid-template-columns: 2.25rem minmax(0, 1fr);
    gap: 0.8rem;
    min-width: 0;
}

.plan-step-number {
    display: inline-grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-coral);
    font-family: var(--font-heading, sans-serif);
    font-weight: 900;
}

.plan-step h3,
.run-list h3 {
    margin: 0.15rem 0 0.25rem;
    font-size: 1.02rem;
    line-height: 1.2;
}

.plan-step p,
.run-list p {
    color: var(--plan-muted);
    font-size: 0.92rem;
    line-height: 1.5;
}

.run-section {
    background: #f2e8d8;
}

.run-list {
    display: grid;
    gap: 0.8rem;
    margin-left: 3.05rem;
}

.run-list li {
    display: grid;
    grid-template-columns: 7.2rem minmax(0, 1fr);
    gap: 0.85rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--plan-line);
}

.run-list li:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.run-time {
    color: var(--plan-coral-dark);
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.07em;
    line-height: 1.3;
    text-transform: uppercase;
}

.host-tip {
    display: grid;
    grid-template-columns: 6rem minmax(0, 1fr);
    gap: 0.85rem;
    margin: 1.5rem 0 0 3.05rem;
    padding: 1rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-sun);
}

.host-tip strong {
    font-family: var(--font-heading, sans-serif);
    font-size: 1rem;
    line-height: 1.1;
}

.host-tip p {
    margin: 0;
    font-size: 0.88rem;
    line-height: 1.45;
}

.plan-sidebar {
    display: grid;
    gap: 1.25rem;
    min-width: 0;
}

.sidebar-card {
    padding: 1.25rem;
}

.sidebar-card h2 {
    margin: 0.45rem 0 0.7rem;
    font-family: var(--font-heading, sans-serif);
    font-size: 1.55rem;
    letter-spacing: -0.05em;
    line-height: 1;
}

.sidebar-card p:not(.section-label) {
    color: var(--plan-muted);
    font-size: 0.9rem;
    line-height: 1.5;
}

.sidebar-card dl {
    margin: 0.8rem 0 0;
}

.sidebar-card dl > div {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.7rem 0;
    border-top: 1px solid var(--plan-line);
}

.sidebar-card dt {
    color: var(--plan-muted);
    font-size: 0.78rem;
    font-weight: 800;
}

.sidebar-card dd {
    margin: 0;
    font-size: 0.82rem;
    font-weight: 900;
    text-align: right;
}

.next-card {
    background: var(--plan-ink);
    color: var(--plan-surface);
}

.next-card .section-label,
.next-card p:not(.section-label) {
    color: var(--plan-mint);
}

.sidebar-links {
    display: grid;
    gap: 0.55rem;
    margin-top: 1rem;
}

.sidebar-links a {
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--plan-mint);
    color: var(--plan-surface);
    font-size: 0.8rem;
    font-weight: 900;
    text-decoration: none;
}

.sidebar-links a:hover,
.sidebar-links a:focus-visible {
    background: var(--plan-mint);
    color: var(--plan-ink);
}

.related-section {
    margin-top: 2.5rem;
    padding-top: 1.5rem;
    border-top: 3px solid var(--plan-ink);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 1.25rem;
}

.related-card {
    min-width: 0;
    padding: 1.1rem;
    border: 2px solid var(--plan-ink);
    background: var(--plan-surface);
}

.related-card h3 {
    margin: 0.45rem 0 0.5rem;
    font-family: var(--font-heading, sans-serif);
    font-size: 1.25rem;
    letter-spacing: -0.04em;
    line-height: 1;
}

.related-card h3 a {
    color: var(--plan-ink);
    text-decoration: none;
}

.related-card h3 a:hover,
.related-card h3 a:focus-visible {
    color: var(--plan-coral-dark);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.related-card p {
    color: var(--plan-muted);
    font-size: 0.86rem;
    line-height: 1.45;
}

.related-meta {
    display: block;
    margin-top: 1rem;
    color: var(--plan-coral-dark);
    font-size: 0.7rem;
    font-weight: 900;
    line-height: 1.3;
    text-transform: uppercase;
}

.site-footer {
    border-top: 3px solid var(--plan-ink);
    background: var(--plan-ink);
    color: var(--plan-surface);
}

.footer-grid {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) minmax(180px, 260px);
    gap: 1.5rem;
    align-items: start;
    padding-top: 1.5rem;
    padding-bottom: 1.5rem;
}

.site-footer .plan-logo,
.site-footer .footer-nav a {
    color: var(--plan-surface);
}

.site-footer .footer-nav a:hover,
.site-footer .footer-nav a:focus-visible {
    color: var(--plan-sun);
}

.site-footer p {
    color: var(--plan-mint);
    font-size: 0.82rem;
    line-height: 1.4;
}

@media (max-width: 800px) {
    .plan-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .plan-sidebar {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .related-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

@media (max-width: 560px) {
    .plan-header-inner {
        align-items: flex-start;
        flex-direction: column;
        padding-top: 0.8rem;
        padding-bottom: 0.8rem;
    }

    .plan-nav {
        justify-content: flex-start;
    }

    .plan-hero {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.2rem;
    }

    .plan-stamp {
        width: 100%;
        min-height: 0;
        grid-template-columns: auto minmax(0, 1fr) auto;
        justify-items: start;
        align-items: center;
        gap: 0.8rem;
        padding: 0.75rem;
        text-align: left;
        transform: none;
    }

    .plan-stamp strong {
        margin-top: 0;
    }

    .fit-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .fit-strip > div:nth-child(2) {
        border-right: 0;
    }

    .fit-strip > div:nth-child(-n + 2) {
        border-bottom: 1px solid var(--plan-line);
    }

    .plan-actions {
        top: 0.5rem;
    }

    .plan-sidebar,
    .related-grid,
    .checklist {
        grid-template-columns: minmax(0, 1fr);
    }

    .section-intro,
    .checklist,
    .steps-list,
    .run-list,
    .host-tip {
        margin-left: 0;
    }

    .run-list li {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.35rem;
    }

    .host-tip {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.35rem;
    }
}

@media (max-width: 380px) {
    .idea-page .plan-shell,
    .plan-header-inner {
        width: min(calc(100% - 1rem), 1120px);
    }

    .plan-main {
        padding-top: 0.75rem;
    }

    .plan-hero {
        padding: 1.1rem;
    }

    .plan-hero h1 {
        font-size: clamp(2.05rem, 14vw, 3.2rem);
    }

    .fit-strip > div {
        padding: 0.75rem;
    }

    .fit-strip strong {
        font-size: 0.88rem;
    }

    .plan-actions {
        gap: 0.45rem;
        padding: 0.5rem;
    }

    .action-button {
        flex: 1 1 8.5rem;
        padding-right: 0.55rem;
        padding-left: 0.55rem;
    }

    .action-status {
        flex-basis: 100%;
    }

    .plan-section,
    .sidebar-card {
        padding: 1rem;
    }

    .plan-step {
        grid-template-columns: 2rem minmax(0, 1fr);
        gap: 0.6rem;
    }

    .plan-step-number {
        width: 2rem;
        height: 2rem;
    }

    .plan-step h3,
    .run-list h3 {
        font-size: 0.95rem;
    }

    .plan-step p,
    .run-list p,
    .checklist-item label {
        font-size: 0.86rem;
    }
}

@media print {
    @page {
        margin: 0.55in;
    }

    body.idea-page {
        background: #fff !important;
        color: #000;
        font-size: 10.5pt;
    }

    .plan-header,
    .plan-actions,
    .site-footer,
    .breadcrumbs,
    .related-section,
    .plan-sidebar,
    .skip-link {
        display: none !important;
    }

    .plan-main {
        padding: 0;
    }

    .idea-page .plan-shell {
        width: 100%;
        max-width: none;
    }

    .plan-hero {
        display: block;
        padding: 1rem 0 1.2rem;
        border: 0;
        border-bottom: 2px solid #000;
        box-shadow: none;
    }

    .plan-hero::after {
        display: none;
    }

    .plan-hero h1 {
        max-width: none;
        margin-top: 0.35rem;
        font-size: 30pt;
    }

    .plan-lede {
        max-width: none;
        color: #222;
    }

    .plan-tags {
        margin-top: 0.7rem;
    }

    .plan-tags span {
        border-color: #000;
        background: #fff;
    }

    .fit-strip {
        margin: 1rem 0;
        border-color: #000;
        background: #fff;
    }

    .fit-strip > div {
        border-color: #000;
    }

    .fit-strip span,
    .fit-strip small {
        color: #333;
    }

    .fit-strip small {
        color: #000;
    }

    .plan-layout {
        display: block;
    }

    .plan-primary {
        display: block;
    }

    .plan-section {
        margin: 0 0 1rem;
        padding: 0.8rem 0;
        border: 0;
        border-bottom: 1px solid #aaa;
        break-inside: avoid;
    }

    .run-section {
        background: #fff;
    }

    .section-heading {
        margin-bottom: 0.7rem;
    }

    .section-heading h2 {
        font-size: 18pt;
    }

    .section-intro {
        margin: 0 0 0.8rem 3.05rem;
        color: #222;
    }

    .checklist {
        margin-left: 3.05rem;
    }

    .checklist-item label {
        border-color: #999;
        background: #fff;
    }

    .steps-list,
    .run-list {
        margin-left: 3.05rem;
    }

    .plan-step,
    .run-list li {
        break-inside: avoid;
    }

    .plan-step-number {
        border-color: #000;
        background: #fff;
    }

    .plan-step p,
    .run-list p {
        color: #222;
    }

    .host-tip {
        margin: 1rem 0 0 3.05rem;
        border-color: #000;
        background: #fff;
    }

    .host-tip p {
        color: #000;
    }

    .idea-page a {
        color: inherit;
        text-decoration: none;
    }
}