.calculator-page { padding-top: .75rem; }
.calculator-content { width: 100%; max-width: 640px; margin-inline: auto; }
.page-navigation { flex: none; color: var(--muted); font-size: 16px; font-weight: 500; }
.page-navigation a:hover { color: var(--accent); }
.page-heading { display: flex; align-items: center; justify-content: space-between; gap: .75rem; padding-bottom: .75rem; border-bottom: 1px solid var(--border); }
.page-heading h1 { min-width: 0; margin: 0; font-size: 17px; font-weight: 700; letter-spacing: 0; line-height: 1.15; text-align: right; }
.calculator-row { display: grid; grid-template-columns: 5.5rem minmax(0, 1fr); align-items: center; gap: .75rem; padding: .5rem 0; border-bottom: 1px solid var(--border); }
.calculator-row > span, .calculator-row > label { color: var(--text); font-size: 16px; font-weight: 500; }
.split-controls { display: grid; grid-auto-columns: minmax(0, 1fr); grid-auto-flow: column; align-items: center; gap: 2px; text-align: center; }
.split-controls .code-cells { display: contents; }
.date-controls { display: grid; grid-auto-columns: minmax(0, 1fr); grid-auto-flow: column; min-height: 46px; border-bottom: 1px solid var(--border); border-radius: 6px; background: var(--input-bg); }
.date-controls select { min-width: 0; margin: 0; padding: 0 .25rem; border: 0; border-radius: 0; outline: none; background: transparent; color: var(--text); font: inherit; font-size: 16px; font-weight: 500; text-align: center; text-align-last: center; appearance: none; cursor: pointer; }
.date-controls option { background: var(--input-bg); color: var(--text); }
.date-controls select + select { border-left: 1px solid var(--line); }
.code-cells { display: grid; grid-auto-columns: minmax(0, 1fr); grid-auto-flow: column; gap: .75rem; }
.code-cells input { min-width: 0; min-height: 46px; padding: 0; border: 0; border-bottom: 2px solid var(--line); border-radius: 0; outline: none; background: transparent; color: var(--text); font: 600 clamp(16px, 4.6vw, 18px) ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; text-align: center; }
.text-control { display: grid; grid-template-columns: 1fr auto 1fr; min-width: 0; min-height: 46px; align-items: center; text-align: center; padding-inline: .5rem; border: 0; border-radius: 6px; background: color-mix(in srgb, var(--accent) 30%, var(--page-bg)); }
.text-control input { grid-column: 1 / -1; width: 100%; min-width: 0; min-height: 2.75rem; padding: 0; border: 0; outline: none; border-radius: inherit; background: transparent; color: var(--text); font: inherit; font-size: 16px; }
.text-control output { grid-column: 2; padding-block: .25rem; font-size: clamp(20px, 6.2vw, 22px); font-weight: 500; line-height: 1.4; }
.copy-button { grid-column: 3; justify-self: end; min-width: 2.75rem; min-height: 2.75rem; padding: 0; border: 0; border-radius: 6px; background: transparent; color: var(--accent); cursor: pointer; }
.copy-button svg { display: block; margin: auto; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.copy-button .icon-check, .copy-button.copied .icon-copy { display: none; }
.copy-button.copied .icon-check { display: block; }
.mode-switch { display: grid; grid-template-columns: 1fr 1fr; border-bottom: 1px solid var(--border); }
.mode-switch button { min-height: 42px; padding: 0; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; background: none; color: var(--muted); font: inherit; font-size: 16px; font-weight: 500; cursor: pointer; }
.mode-switch button[aria-pressed="true"] { border-bottom-color: var(--accent); color: var(--text); font-weight: 600; }
.calculate-button { display: block; width: min(60%, 12rem); min-height: 2.75rem; margin: 1rem auto 0; padding: .65rem 1rem; border: 0; border-radius: 6px; background: var(--accent); color: var(--button-text); font: inherit; font-size: 19px; font-weight: 600; letter-spacing: .4em; text-indent: .4em; cursor: pointer; }
.calculate-button:hover { background: var(--accent); filter: brightness(.95); }
.calculator-page :where(a, button, .showcase):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }