:root {
  --ink: #1b2430;
  --ink-soft: #4b5a66;
  --paper: #f4f7f6;
  --card: #ffffff;
  --frost: #dceae8;
  --frost-strong: #bfdad6;
  --thaw: #2e8b84;
  --thaw-deep: #1f655f;
  --ember: #b5633c;
  --ember-soft: #f3e3d8;
  --border: rgba(27, 36, 48, 0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 18px;
  --font-display: 'Bitter', Georgia, serif;
  --font-body: 'Karla', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;  
}
    
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

.wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

h1, h2, h3 {
    font-family: var(--font-display);
    font-weight: 500;
    margin: 0;
    color: var(--ink);
}

a { color: inherit; }

/* header */
.site-header {
    border-bottom: 1px solid var(--border);
    background: var(--paper);
    position: sticky;
    top: 0;
    z-index: 10;
}
.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 19px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo-mark {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--frost-strong) 45%, var(--thaw) 45%);
    display: inline-block;
}
.nav { display: flex; gap: 28px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--ink-soft); }
.nav a:hover { color: var(--thaw-deep); }

/* hero */
.hero { padding: 64px 0 80px; }
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
}
.eyebrow {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.04em;
    color: var(--thaw-deep);
    text-transform: uppercase;
    margin: 0 0 16px;
}
.hero h1 {
    font-size: 44px;
    line-height: 1.12;
    margin-bottom: 20px;
}
.lede {
    font-size: 17px;
    color: var(--ink-soft);
    max-width: 42ch;
}

/* calculator card */
.calc-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
}
.debts-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 12px;
}
.debt-row {
    display: grid;
    grid-template-columns: 1.3fr 1fr 0.8fr 1fr auto;
    gap: 8px;
    align-items: center;
}
.debt-row-labels {
    padding: 0 2px;
    margin-bottom: 2px;
}
.debt-row-labels span {
    font-size: 11px;
    color: var(--ink-soft);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.debt-row input {
    width: 100%;
    font-size: 13px;
    font-family: var(--font-body);
    padding: 9px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--paper);
    color: var(--ink);
}
.debt-row input:focus {
    outline: none;
    border-color: var(--thaw);
    box-shadow: 0 0 0 3px rgba(46, 139, 132, 0.15);
}
.debt-row input[data-f="balance"],
.debt-row input[data-f="rate"],
.debt-row input[data-f="minPay"] {
    font-family: var(--font-mono);
}
.remove-btn {
    border: none;
    background: transparent;
    color: var(--ink-soft);
    cursor: pointer;
    font-size: 16px;
    padding: 6px;
    line-height: 1;
    border-radius: var(--radius-sm);
}
.remove-btn:hover { background: var(--ember-soft); color: var(--ember); }

.btn {
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid var(--border);
    padding: 10px 16px;
    background: var(--card);
    color: var(--ink);
}
.btn:hover { background: var(--paper); }
.btn:active { transform: scale(0.98); }
.btn-block { width: 100%; }
.btn-ghost { border-style: dashed; color: var(--ink-soft); }
.btn-primary {
    background: var(--thaw);
    border-color: var(--thaw);
    color: white;
}
.btn-primary:hover { background: var(--thaw-deep); border-color: var(--thaw-deep);}

.field-row.extra-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 20px 0 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.field-row.extra-row label {
    font-size: 13px;
    color: var(--ink-soft);
}
.extra-input {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--paper);
}
.currency-prefix {
    padding: 0 0 0 10px;
    color: var(--ink-soft);
    font-family: var(--font-mono);
    font-size: 13px;
}
.extra-input input {
    border: none;
    background: transparent;
    padding: 9px 10px 9px 4px;
    font-family: var(--font-mono);
    font-size: 13px;
    width: 90px;
    color: var(--ink);
}
.extra-input input:focus { outline: none; }

.results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}
.result-tile {
    background: var(--paper);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    border-left: 3px solid var(--frost-strong);
}
.result-tile[data-method="avalanche"] { border-left-color: var(--thaw); }
.result-label {
    font-size: 12px;
    color: var(--ink-soft);
    margin: 0 0 4px;
}
.result-value {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 500;
    margin: 0;
}
.result-sub {
    font-size: 12px;
    color: var(--ink-soft);
    margin: 4px 0 0;
}

.chart-wrap {
    position: relative;
    height: 200px;
    margin-bottom: 8px;
}
.winner-note {
    font-size: 13px;
    color: var(--ink-soft);
    text-align: center;
    margin: 0;
}
.calc-disclaimer {
    font-size: 11px;
    color: var(--ink-soft);
    text-align: center;
    margin: 10px 0 0;
    padding-top: 10px;
    border-top: 1px solid var(--border);
    line-height: 1.5;
}
.link-btn {
    background: none;
    border: none;
    padding: 0;
    color: var(--thaw-deep);
    text-decoration: underline;
    font-size: 11px;
    cursor: pointer;
    font-family: var(--font-body);
}

/* steps */
.steps { padding: 72px 0; }
.steps h2 { font-size: 26px; margin-bottom: 40px; }
.step-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.step-num {
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--thaw-deep);
    display: block;
    margin-bottom: 10px;
}
.step-list h3 {
    font-size: 18px;
    margin-bottom: 8px;
}
.step-list p {
    font-size: 14px;
    color: var(--ink-soft);
    margin: 0;
}

/* methods */
.methods { padding: 0 0 72px; }
.methods-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.method-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
}
.method-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 20px;
    margin-bottom: 14px;
}
.method-tag.frost { background: var(--frost); color: var(--ink-soft); }
.method-tag.thaw { background: var(--thaw); color: white; }
.method-card h3 { font-size: 19px; margin-bottom: 10px; }
.method-card p { font-size: 14px; color: var(--ink-soft); }
.method-note { font-weight: 500; color: var(--ink) !important; margin-top: 12px; }

/* capture */
.capture {
    background: var(--frost);
    padding: 56px 0;
}
.capture-inner { text-align: center; max-width: 400px; margin: 0 auto; }
.capture h2 { font-size: 22px; margin-bottom: 8px; }
.capture p { font-size: 14px; color: var(--ink-soft); margin: 0 0 20px; }
.capture-form {
    display: flex;
    gap: 8px;
}
.capture-form input {
    flex: 1;
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-family: var(--font-body);
    font-size: 14px;
}
.capture-form input:focus { outline: none; border-color: var(--thaw); }
.capture-fine { font-size: 12px; margin-top: 10px; color: var(--ink-soft); }

/* faq */
.faq { padding: 64px 0 80px; max-width: 700px; margin: 0 auto; }
.faq h2 { font-size: 24px; margin-bottom: 24px; padding: 0 24px; }
.faq details {
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
}
.faq summary {
    cursor: pointer;
    font-weight: 500;
    font-size: 15px;
}
.faq p {
    font-size: 14px;
    color: var(--ink-soft);
    margin: 10px 0 0;
}

/* footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 24px 0;
}
.site-footer .wrap {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--ink-soft);
    font-family: var(--font-mono);
}

/* responsive */
@media (max-width: 860px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .step-list { grid-template-columns: 1fr; gap: 28px; }
    .methods-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 34px; }
    .nav { display: none; }
}
@media (max-width: 560px) {
    .debt-row-labels { display: none; }
    .debt-row {
        grid-template-columns: 1fr 1fr;
        grid-template-areas: "name name" "balance rate" "minpay remove";
    }
    .debt-row input[data-f="name"] { grid-area: name; }
    .debt-row input[data-f="balance"] { grid-area: balance; }
    .debt-row input[data-f="rate"] { grid-area: rate; }
    .debt-row input[data-f="minPay"] { grid-area: minpay; }
    .remove-btn { grid-area: remove; justify-self: end; }
    .results-grid { grid-template-columns: 1fr;}
    .capture-form { flex-direction: column; }
}

/* keyboard focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
    outline: 2px solid var(--thaw);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}