/* ============================================================
   Cluit — Construction Spec Book design system
   One stylesheet for the public site (store + software marketing).
   Concept: a construction document set / spec book.
   ============================================================ */

:root {
    --paper: #EDEFF2;
    --sheet: #FFFFFF;
    --ink: #0E1826;
    --soft-ink: #4A5768;
    --navy: #1E4A8A;
    --deep-navy: #143560;
    --teal: #0F9E97;
    --amber: #C4761A;
    --rule: #C6CBD3;

    --font-display: 'Archivo', sans-serif;
    --font-body: 'IBM Plex Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;

    --radius: 2px;
    --sheet-offset: 6px 6px 0 0 #d8dbe0;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 90px; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.65;
    color: var(--ink);
    background-color: var(--paper);
    overflow-x: hidden;
}

h1, h2, h3, .display {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--ink);
}

.mono, .doc-meta {
    font-family: var(--font-mono);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

a { color: var(--navy); }

:focus-visible { outline: 3px solid var(--teal); outline-offset: 2px; }
:focus:not(:focus-visible) { outline: none; }

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
    position: absolute; top: -48px; left: 0;
    background: var(--navy); color: #fff; padding: 10px 18px; z-index: 10000;
    font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em;
    transition: top 0.2s;
}
.skip-link:focus { top: 0; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 1.25rem; }

/* ---------- Utility stripe ---------- */
.utility-stripe {
    background: var(--deep-navy);
    color: #cfd9e8;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    padding: 7px 0;
}
.utility-stripe .container {
    display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
}
.utility-stripe span { white-space: nowrap; }

/* ---------- Global nav ---------- */
.store-nav {
    background: var(--sheet);
    border-bottom: 1px solid var(--rule);
    position: sticky; top: 0; z-index: 1000;
}
.store-nav .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 68px; gap: 1.5rem;
}
.store-nav .nav-logo img { height: 54px; width: auto; display: block; }
.store-nav-links { display: flex; align-items: center; gap: 1.75rem; }
.store-nav-links a {
    text-decoration: none; color: var(--soft-ink);
    font-weight: 500; font-size: 0.95rem;
    border-bottom: 2px solid transparent; padding: 4px 0;
}
.store-nav-links a:hover { color: var(--navy); border-bottom-color: var(--rule); }
.store-nav-links a.active { color: var(--navy); border-bottom-color: var(--navy); }
.store-nav-cta { display: flex; align-items: center; gap: 0.75rem; }

.store-nav-toggle {
    display: none; background: none; border: 1px solid var(--rule);
    border-radius: var(--radius); padding: 8px 10px; cursor: pointer; color: var(--ink);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.8rem 1.6rem;
    font-family: var(--font-body); font-size: 0.975rem; font-weight: 600;
    border-radius: var(--radius); border: none; cursor: pointer;
    text-decoration: none; transition: background 0.15s, color 0.15s, border-color 0.15s;
    touch-action: manipulation; /* eliminates 300ms tap delay on iOS */
    -webkit-tap-highlight-color: transparent;
}
.btn-primary { background: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--deep-navy); }
.btn-secondary {
    background: transparent; color: var(--navy);
    border: 1.5px solid var(--navy); padding: calc(0.8rem - 1.5px) calc(1.6rem - 1.5px);
}
.btn-secondary:hover { background: rgba(30, 74, 138, 0.06); }
.btn-teal { background: var(--teal); color: #fff; }
.btn-teal:hover { background: #0c837d; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }

/* ---------- Sheet component ---------- */
.sheet {
    background: var(--sheet);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    position: relative;
    padding: 1.75rem;
}
.sheet::after {
    content: '';
    position: absolute; inset: 7px;
    border: 1px solid #e4e7eb;
    pointer-events: none;
}
.sheet > * { position: relative; z-index: 1; }
.sheet-stacked { box-shadow: var(--sheet-offset); }

.title-block {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.title-block th, .title-block td {
    border: 1px solid var(--rule);
    padding: 6px 10px;
    text-align: left;
}
.title-block th {
    background: var(--paper);
    color: var(--soft-ink);
    font-weight: 500;
}
.title-block td { color: var(--ink); font-weight: 600; }

/* ---------- Amber stamp ---------- */
.stamp {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--amber);
    border: 2px solid var(--amber);
    border-radius: var(--radius);
    padding: 6px 14px;
    transform: rotate(-6deg);
}

/* ---------- Section scaffolding ---------- */
.section { padding: 4.5rem 0; }
.section-alt { background: var(--sheet); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.section-navy { background: var(--deep-navy); color: #d8e1ee; }
.section-navy h2, .section-navy h3 { color: #fff; }

.eyebrow {
    font-family: var(--font-mono); font-size: 12px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.14em;
    color: var(--teal); margin-bottom: 0.75rem; display: block;
}
.section-title { font-size: 2rem; margin-bottom: 0.75rem; }
.section-sub { color: var(--soft-ink); font-size: 1.05rem; max-width: 640px; }

/* ---------- Document index table ---------- */
.doc-table-wrap { overflow-x: auto; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--sheet); }
.doc-table { width: 100%; border-collapse: collapse; font-size: 0.925rem; }
.doc-table thead th {
    background: var(--deep-navy); color: #fff;
    font-family: var(--font-mono); font-size: 11px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.12em;
    padding: 12px 14px; text-align: left; white-space: nowrap;
}
.doc-table tbody td {
    padding: 14px; border-top: 1px solid var(--rule); vertical-align: top;
}
.doc-table tbody tr:hover { background: #f5f7fa; }
.doc-table .doc-no { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--soft-ink); white-space: nowrap; }
.doc-table .doc-title a { font-weight: 600; color: var(--navy); text-decoration: none; }
.doc-table .doc-title a:hover { text-decoration: underline; }
.doc-table .doc-desc { color: var(--soft-ink); font-size: 0.85rem; display: block; margin-top: 2px; }
.doc-table .doc-price { font-weight: 700; white-space: nowrap; }
.doc-compare { color: var(--soft-ink); text-decoration: line-through; font-weight: 400; font-size: 0.85rem; margin-left: 6px; }
.doc-table .doc-compare { font-size: 0.85rem; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 1.5rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.division-card { text-decoration: none; display: block; color: inherit; }
.division-card:hover { border-color: var(--navy); }
.division-card .doc-meta { color: var(--soft-ink); margin-bottom: 0.5rem; display: block; }
.division-card h3 { font-size: 1.15rem; margin-bottom: 0.5rem; }
.division-card p { color: var(--soft-ink); font-size: 0.9rem; }

/* ---------- Steps ---------- */
.step-num {
    font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em;
    color: var(--sheet); background: var(--navy);
    display: inline-flex; align-items: center; justify-content: center;
    width: 34px; height: 34px; border-radius: var(--radius);
    margin-bottom: 0.9rem;
}

/* ---------- FAQ ---------- */
.faq-list details { border-bottom: 1px solid var(--rule); }
.faq-list details:first-child { border-top: 1px solid var(--rule); }
.faq-list summary {
    font-weight: 600; padding: 1.1rem 0; cursor: pointer; list-style: none;
    display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: '+'; color: var(--navy); font-size: 1.25rem; line-height: 1; flex-shrink: 0; }
.faq-list details[open] summary::after { content: '\2212'; }
.faq-list .faq-a { padding: 0 0 1.1rem; color: var(--soft-ink); max-width: 760px; }

/* ---------- Forms ---------- */
label { font-weight: 600; font-size: 0.9rem; }
input[type="text"], input[type="email"], input[type="password"], textarea, select {
    font-family: var(--font-body); font-size: 0.95rem; color: var(--ink);
    border: 1.5px solid var(--rule); border-radius: var(--radius);
    padding: 0.65rem 0.85rem; background: var(--sheet); width: 100%;
}
input:focus, textarea:focus, select:focus { border-color: var(--navy); }

/* ---------- Footer ---------- */
.store-footer {
    background: var(--deep-navy); color: #b9c6d8;
    padding: 3.5rem 0 2rem; margin-top: 4rem;
    font-size: 0.9rem;
}
.store-footer h4 {
    font-family: var(--font-mono); font-size: 11px; font-weight: 500;
    text-transform: uppercase; letter-spacing: 0.14em;
    color: #8fa3bd; margin-bottom: 0.9rem;
}
.store-footer a { color: #d8e1ee; text-decoration: none; display: block; padding: 3px 0; }
.store-footer a:hover { color: #fff; text-decoration: underline; }
.store-footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.store-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.15);
    margin-top: 2.5rem; padding-top: 1.25rem;
    display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
    font-family: var(--font-mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em;
    color: #8fa3bd;
}

/* ---------- Hero ---------- */
.store-hero { padding: 4.5rem 0 4rem; }
.store-hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 3rem; align-items: center; }
.store-hero h1 { font-size: 2.7rem; margin-bottom: 1.1rem; }
.store-hero .hero-sub { color: var(--soft-ink); font-size: 1.1rem; margin-bottom: 1.75rem; max-width: 560px; }
.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; margin-bottom: 1.1rem; }
.trust-line {
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em;
    text-transform: uppercase; color: var(--soft-ink);
}

.hero-sheet-stack { position: relative; }
.hero-sheet-stack .sheet { position: relative; }
.hero-sheet-stack .sheet-behind {
    position: absolute; inset: 0; background: var(--sheet);
    border: 1px solid var(--rule); border-radius: var(--radius);
}
.hero-sheet-stack .sheet-behind.b1 { transform: translate(10px, 10px); }
.hero-sheet-stack .sheet-behind.b2 { transform: translate(20px, 20px); opacity: 0.6; }
.hero-stamp { position: absolute; top: -14px; right: -10px; z-index: 2; background: var(--sheet); }

/* ---------- Breadcrumbs ---------- */
.breadcrumbs {
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em;
    text-transform: uppercase; color: var(--soft-ink);
    padding: 1.25rem 0 0;
}
.breadcrumbs a { color: var(--soft-ink); text-decoration: none; }
.breadcrumbs a:hover { color: var(--navy); text-decoration: underline; }

/* ---------- Price block ---------- */
.price-line { display: flex; align-items: baseline; gap: 0.75rem; margin: 1rem 0; }
.price-line .price { font-family: var(--font-display); font-weight: 800; font-size: 2.2rem; }
.price-line .compare { color: var(--soft-ink); text-decoration: line-through; font-size: 1.1rem; }
.launch-note {
    display: inline-block; font-family: var(--font-mono); font-size: 11px;
    letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--amber); border: 1.5px solid var(--amber); border-radius: var(--radius);
    padding: 5px 10px; margin-top: 0.6rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .store-hero-grid { grid-template-columns: 1fr; }
    .store-footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
    .store-nav-links {
        display: none;
        position: absolute; top: 68px; left: 0; right: 0;
        background: var(--sheet); border-bottom: 1px solid var(--rule);
        flex-direction: column; align-items: flex-start;
        padding: 1rem 1.25rem; gap: 0.75rem;
    }
    .store-nav-links.open { display: flex; }
    .store-nav-toggle { display: block; }
    .doc-table .doc-desc { display: none; }
    .doc-table thead th:nth-child(4), .doc-table tbody td:nth-child(4) { display: none; }
}

@media (max-width: 560px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .store-hero h1 { font-size: 1.9rem; }
    .section-title { font-size: 1.5rem; }
    .store-footer-grid { grid-template-columns: 1fr; }
    .utility-stripe .container { justify-content: center; text-align: center; }
    .utility-stripe span.right { display: none; }
    .doc-table thead th:nth-child(3), .doc-table tbody td:nth-child(3) { display: none; }
}

@media (max-width: 360px) {
    .container { padding: 0 0.9rem; }
    .btn { width: 100%; }
    .hero-actions { flex-direction: column; }
}

/* Free-sample capture forms */
.sample-form { display: inline-flex; gap: 0.5rem; flex-wrap: wrap; }
.sample-form-stacked { display: flex; flex-direction: column; width: 100%; }
.sample-input { border: 1.5px solid var(--navy); padding: 0.6rem 0.75rem; font: inherit; border-radius: 2px; min-width: 0; flex: 1 1 200px; max-width: 100%; height: auto; }
.sample-form-stacked .sample-input { flex: 0 0 auto; }
.sample-form-stacked .sample-input, .sample-form-stacked .btn { width: 100%; }
@media (max-width: 560px) {
    .sample-form { display: flex; flex-direction: column; width: 100%; }
    .sample-form .sample-input, .sample-form .btn { width: 100%; }
}