/* ---------------------------------------------------------------
   BackupGap — the statement aesthetic.
   The product answers "what will this cost". So the page is built
   like a billing statement: ruled line items, right-aligned tabular
   figures, one total set below a heavier rule. Boldness is spent in
   exactly one place: the amber total.
   --------------------------------------------------------------- */

:root {
    --paper:      #eef1f4;
    --panel:      #ffffff;
    --ink:        #15242f;
    --ink-soft:   #4a5c68;
    --ink-faint:  #7b8b96;
    --rule:       #c9d3db;
    --rule-firm:  #9aabb7;
    --amber:      #b4560a;
    --amber-wash: #fbf0e4;
    --slate:      #2f5d75;

    --sans: "IBM Plex Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
    --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

    --shell: 68rem;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.6;
}

.shell {
    width: 100%;
    max-width: var(--shell);
    margin-inline: auto;
    padding-inline: 1.5rem;
}

.skip {
    position: absolute;
    left: -9999px;
}
.skip:focus {
    left: 1rem;
    top: 1rem;
    z-index: 10;
    background: var(--panel);
    padding: 0.6rem 1rem;
    border: 2px solid var(--ink);
}

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

/* --- masthead ------------------------------------------------- */

.masthead {
    border-bottom: 1px solid var(--rule);
    background: var(--panel);
}
.masthead-inner {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1.5rem;
    padding-block: 1.1rem;
    flex-wrap: wrap;
}
.wordmark {
    font-family: var(--mono);
    font-weight: 600;
    font-size: 1.05rem;
    letter-spacing: -0.02em;
    color: var(--ink);
    text-decoration: none;
}
.wordmark span { color: var(--amber); }

.masthead nav {
    display: flex;
    gap: 1.5rem;
    font-size: 0.92rem;
}
.masthead nav a { text-decoration: none; }
.masthead nav a:hover { text-decoration: underline; }

/* --- typography ----------------------------------------------- */

h1 {
    font-size: clamp(1.9rem, 1.3rem + 2.2vw, 2.7rem);
    line-height: 1.15;
    letter-spacing: -0.022em;
    font-weight: 600;
    margin: 0 0 0.8rem;
    max-width: 22ch;
}
h2 {
    font-size: 1.4rem;
    line-height: 1.25;
    letter-spacing: -0.015em;
    font-weight: 600;
    margin: 2.6rem 0 0.8rem;
}
h3 {
    font-size: 1.08rem;
    font-weight: 600;
    margin: 1.8rem 0 0.5rem;
}
p, li { max-width: 68ch; }
.lede {
    font-size: 1.12rem;
    color: var(--ink-soft);
    max-width: 58ch;
    margin-top: 0;
}

.prose { padding-block: 3rem 4rem; }
.prose ul { padding-left: 1.1rem; }
.prose li { margin-bottom: 0.4rem; }

/* --- statement ------------------------------------------------ */

.calc {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 21rem);
    gap: 2.5rem;
    align-items: start;
    padding-block: 2.5rem 4rem;
}

.inputs {
    background: var(--panel);
    border: 1px solid var(--rule);
    padding: 1.6rem 1.6rem 1.9rem;
}

.field-group + .field-group {
    margin-top: 1.6rem;
    padding-top: 1.4rem;
    border-top: 1px solid var(--rule);
}
.field-group > h3 { margin-top: 0; }
.field-group > p {
    color: var(--ink-soft);
    font-size: 0.88rem;
    margin: 0 0 1rem;
}

.field {
    display: grid;
    grid-template-columns: 1fr 7.5rem;
    align-items: center;
    gap: 1rem;
    padding-block: 0.42rem;
}
.field label { font-size: 0.94rem; }
.field .hint {
    display: block;
    font-size: 0.8rem;
    color: var(--ink-faint);
}
.field input {
    font-family: var(--mono);
    font-size: 0.95rem;
    text-align: right;
    width: 100%;
    padding: 0.4rem 0.55rem;
    border: 1px solid var(--rule-firm);
    background: var(--paper);
    color: var(--ink);
}

.estimated {
    border-left: 3px solid var(--amber);
    padding-left: 0.9rem;
    margin-left: -1.6rem;
    padding-right: 0;
    background: var(--amber-wash);
    margin-right: -1.6rem;
    padding-top: 0.9rem;
    padding-bottom: 0.9rem;
}
.estimated-flag {
    font-size: 0.8rem;
    color: var(--amber);
    margin: 0 0 0.6rem;
    padding-left: 0;
}

/* the statement panel */
.statement {
    position: sticky;
    top: 1.5rem;
    background: var(--panel);
    border: 1px solid var(--rule-firm);
    padding: 1.4rem 1.5rem 1.6rem;
}
.statement h2 {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0;
}

.line {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    padding-block: 0.5rem;
    border-bottom: 1px solid var(--rule);
    font-size: 0.9rem;
}
.line span:last-child {
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}
.line.muted { color: var(--ink-soft); }

.total {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 2px solid var(--ink);
}
.total-label { font-size: 0.9rem; }
.total-figure {
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    font-size: 1.75rem;
    font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--amber);
    white-space: nowrap;
}

.scoped {
    margin-top: 1.4rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--rule);
}
.scoped .total-figure {
    font-size: 1.3rem;
    color: var(--ink);
}
.saving {
    margin: 0.7rem 0 0;
    font-size: 0.88rem;
    color: var(--ink-soft);
    max-width: none;
}
.saving strong {
    font-family: var(--mono);
    color: var(--ink);
}

/* email capture — revealed only once the visitor has entered their own
   numbers, so the ask follows the value rather than gating it (PRD §4) */
.capture {
    margin-top: 1.4rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--rule);
}
.capture-note {
    font-size: 0.84rem;
    color: var(--ink-soft);
    margin: 0 0 0.8rem;
    max-width: none;
}
.capture-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.5rem;
    align-items: stretch;
}
.capture-form input[type="email"] {
    font-family: var(--sans);
    font-size: 0.92rem;
    width: 100%;
    padding: 0.55rem 0.6rem;
    border: 1px solid var(--rule-firm);
    background: var(--paper);
    color: var(--ink);
}
.capture-form .btn {
    padding: 0.55rem 1rem;
    font-size: 0.9rem;
    cursor: pointer;
}
.capture-form .btn:disabled { opacity: 0.6; cursor: default; }
.capture-error {
    font-size: 0.82rem;
    color: var(--amber);
    margin: 0.6rem 0 0;
}

[x-cloak] { display: none !important; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.assumption {
    font-size: 0.8rem;
    color: var(--ink-faint);
    margin: 1.3rem 0 0;
    max-width: none;
}

/* --- tables --------------------------------------------------- */

.ledger {
    width: 100%;
    border-collapse: collapse;
    margin: 1.2rem 0 1.6rem;
    font-size: 0.93rem;
}
.ledger th,
.ledger td {
    text-align: left;
    padding: 0.6rem 0.8rem 0.6rem 0;
    border-bottom: 1px solid var(--rule);
    vertical-align: top;
}
.ledger th {
    font-weight: 600;
    border-bottom: 1px solid var(--rule-firm);
}
.ledger td.num,
.ledger th.num {
    text-align: right;
    font-family: var(--mono);
    font-variant-numeric: tabular-nums;
    padding-right: 0;
    white-space: nowrap;
}

/* --- home hero ------------------------------------------------ */

.hero { padding-block: 3.5rem 1rem; }
.hero .lede { margin-bottom: 1.8rem; }

.btn {
    display: inline-block;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.7rem 1.3rem;
    background: var(--ink);
    color: var(--paper);
    text-decoration: none;
    border: 1px solid var(--ink);
}
.btn:hover { background: #0d1922; }
.btn-quiet {
    background: transparent;
    color: var(--ink);
    margin-left: 0.6rem;
}
.btn-quiet:hover { background: var(--panel); }

.claim {
    border-left: 3px solid var(--amber);
    padding: 0.2rem 0 0.2rem 1.1rem;
    margin: 2.5rem 0;
    color: var(--ink-soft);
}
.claim p { margin: 0; }

/* --- footer --------------------------------------------------- */

.footer {
    border-top: 1px solid var(--rule);
    background: var(--panel);
    margin-top: 3rem;
}
.footer-inner {
    padding-block: 1.8rem 2.4rem;
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    flex-wrap: wrap;
}
.footer-note {
    font-size: 0.84rem;
    color: var(--ink-soft);
    margin: 0;
    max-width: 40ch;
}
.footer nav {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.86rem;
}

/* --- responsive ----------------------------------------------- */

@media (max-width: 62rem) {
    .calc { grid-template-columns: minmax(0, 1fr); }
    .statement {
        position: static;
        order: -1;
    }
}

@media (max-width: 34rem) {
    .field { grid-template-columns: 1fr 5.5rem; gap: 0.6rem; }
    .estimated { margin-inline: -1.6rem; padding-inline: 1.1rem; }
    .capture-form { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

/* --- code blocks ---------------------------------------------- */

pre {
    background: var(--panel);
    border: 1px solid var(--rule);
    border-left: 3px solid var(--rule-firm);
    padding: 1rem 1.1rem;
    overflow-x: auto;
    font-size: 0.85rem;
    line-height: 1.55;
    max-width: 68ch;
}
code {
    font-family: var(--mono);
}
p > code {
    background: var(--panel);
    border: 1px solid var(--rule);
    padding: 0.05em 0.3em;
    font-size: 0.88em;
}