/* ==========================================================================
   Hash Brown Engineering — shared stylesheet
   Used by the landing page and by every tool under /tools/.
   Quiet and typographic: warm paper, restrained type, one ochre accent.
   ========================================================================== */

/* --- Design tokens ------------------------------------------------------ */

:root {
    color-scheme: light dark;

    --bg:          #fbfaf8;
    --surface:     #ffffff;
    --ink:         #1b1917;
    --ink-muted:   #6f6a64;
    --ink-faint:   #97918a;
    --rule:        #e6e1d9;
    --accent:      #9a5f28;
    --accent-soft: #f4ece1;

    --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", serif;
    --font-sans:  ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
                  Roboto, Helvetica, Arial, sans-serif;
    --font-mono:  ui-monospace, "SF Mono", "Cascadia Mono", "Cascadia Code",
                  Consolas, "Liberation Mono", monospace;

    --measure: 44rem;
    --gutter:  clamp(1.25rem, 5vw, 2.5rem);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg:          #14130f;
        --surface:     #1c1a16;
        --ink:         #ece8e1;
        --ink-muted:   #a49e94;
        --ink-faint:   #7c766c;
        --rule:        #2e2b25;
        --accent:      #d99b5b;
        --accent-soft: #26201a;
    }
}

/* --- Base --------------------------------------------------------------- */

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

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 2px;
}

/* Skip link — visible only once focused by keyboard. */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--surface);
    color: var(--ink);
    padding: 0.6rem 1rem;
    z-index: 10;
}
.skip-link:focus { left: var(--gutter); top: 0.75rem; }

/* --- Layout ------------------------------------------------------------- */

.page {
    max-width: var(--measure);
    margin: 0 auto;
    padding: clamp(3rem, 10vw, 6rem) var(--gutter) 4rem;
}

.section { margin-block-start: clamp(3.5rem, 9vw, 5.5rem); }

/* Small caps label that opens each section. */
.section-label {
    margin: 0 0 1.5rem;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

/* --- Masthead ----------------------------------------------------------- */

.masthead h1 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(2rem, 6.5vw, 2.9rem);
    font-weight: 400;
    line-height: 1.15;
    letter-spacing: -0.015em;
}

/* Short accent rule beneath the wordmark. */
.masthead h1::after {
    content: "";
    display: block;
    width: 3.25rem;
    height: 2px;
    margin-block-start: 1.15rem;
    background: var(--accent);
}

.masthead .lede {
    margin: 1.5rem 0 0;
    max-width: 34rem;
    font-size: 1.075rem;
    color: var(--ink-muted);
    text-wrap: pretty;
}

/* --- Tools index -------------------------------------------------------- */

.tool-list {
    margin: 0;
    padding: 0;
    list-style: none;
    border-block-start: 1px solid var(--rule);
}

.tool-list > li { border-block-end: 1px solid var(--rule); }

.tool {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: baseline;
    gap: 0.15rem 1.25rem;
    padding: 1.05rem 0.5rem 1.05rem 0;
    text-decoration: none;
    color: inherit;
    transition: background-color 0.15s ease, padding-inline-start 0.15s ease;
}

.tool:hover, .tool:focus-visible {
    background: var(--accent-soft);
    padding-inline-start: 0.6rem;
}

.tool-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    line-height: 1.3;
}

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

.tool-desc {
    grid-column: 1;
    font-size: 0.925rem;
    color: var(--ink-muted);
    text-wrap: pretty;
}

/* The trailing arrow, nudged right on hover. */
.tool-go {
    grid-row: 1 / span 2;
    grid-column: 2;
    align-self: center;
    color: var(--ink-faint);
    font-size: 1.05rem;
    transition: transform 0.15s ease, color 0.15s ease;
}

.tool:hover .tool-go { color: var(--accent); transform: translateX(3px); }

@media (prefers-reduced-motion: reduce) {
    .tool, .tool-go { transition: none; }
}

.empty-note {
    margin: 0;
    padding: 1.25rem 0;
    color: var(--ink-muted);
    font-style: italic;
}

/* --- Company information ------------------------------------------------ */

.facts {
    margin: 0;
    display: grid;
    grid-template-columns: minmax(9rem, 12rem) 1fr;
    gap: 0.1rem 1.5rem;
}

.facts dt {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
    padding-block: 0.55rem 0;
}

.facts dd {
    margin: 0;
    padding-block: 0.3rem 0.85rem;
    border-block-end: 1px solid var(--rule);
}

.facts dd:last-of-type { border-block-end: none; }

/* Registration numbers and addresses read better in mono. */
.facts .datum { font-family: var(--font-mono); font-size: 0.925rem; }

@media (max-width: 34rem) {
    .facts { grid-template-columns: 1fr; }
    .facts dt { padding-block-start: 0.9rem; }
    .facts dd { padding-block: 0.15rem 0.75rem; }
}

/* --- Footer ------------------------------------------------------------- */

.site-footer {
    margin-block-start: clamp(3.5rem, 9vw, 5.5rem);
    padding-block-start: 1.5rem;
    border-block-start: 1px solid var(--rule);
    font-size: 0.85rem;
    color: var(--ink-faint);
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 1.25rem;
    justify-content: space-between;
}

/* --- Tool pages --------------------------------------------------------- */

/* Breadcrumb back to the index, sits above a tool's own title. */
.tool-nav {
    margin: 0 0 2rem;
    font-size: 0.875rem;
}

.tool-nav a { color: var(--ink-muted); text-decoration: none; }
.tool-nav a:hover { color: var(--accent); text-decoration: underline; }

.tool-header h1 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(1.75rem, 5vw, 2.35rem);
    font-weight: 400;
    line-height: 1.2;
}

.tool-header .lede {
    margin: 0.85rem 0 0;
    color: var(--ink-muted);
    text-wrap: pretty;
}

/* Generic form controls, so tools look consistent without extra CSS. */
label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-block-end: 0.4rem;
}

input, select, button, textarea {
    font-family: inherit;
    font-size: 1rem;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: 4px;
    padding: 0.6rem 0.7rem;
    width: 100%;
}

input:focus-visible, select:focus-visible, textarea:focus-visible {
    border-color: var(--accent);
}

button {
    width: auto;
    cursor: pointer;
    font-weight: 600;
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

button:hover { filter: brightness(1.08); }

.field { margin-block-end: 1.1rem; }

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 30rem) {
    .field-row { grid-template-columns: 1fr; }
}