:root {
  --bg: #f4f3f2;
  --surface: #ffffff;
  --surface-soft: #f5faff;
  --ink: #15314f;
  --muted: #466482;
  --accent: #007bff;
  --line: #c8dbf2;
  --shadow: 0 14px 30px rgba(0, 123, 255, 0.14);
  --radius: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  background-color: var(--bg);
  color: var(--ink);
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  background: var(--bg);
  background-color: var(--bg);
  color: var(--ink);
}

body:not(.night-mode) {
  --bg: #f4f3f2;
  --surface: #ffffff;
  --surface-soft: #f5faff;
  --ink: #15314f;
  --muted: #466482;
  --accent: #007bff;
  --line: #c8dbf2;
  --shadow: 0 14px 30px rgba(0, 123, 255, 0.14);
  background-color: #f4f3f2;
  color: #15314f;
}

body.night-mode {
  --bg: #0a1020;
  --surface: #111a2e;
  --surface-soft: #16233d;
  --ink: #e7efff;
  --muted: #a8bddc;
  --accent: #007bff;
  --line: #243658;
  --shadow: 0 14px 28px rgba(0, 0, 0, 0.42);
  background-color: #0a1020;
}

html:not(.night-mode) {
  background-color: #f4f3f2;
  color: #15314f;
}

html.night-mode {
  background-color: #0a1020;
  color: #e7efff;
}

.container {
  width: min(950px, 92vw);
  margin: 0 auto;
}

.tool-header {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.tool-header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.tool-header a {
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.tool-logo {
  height: 38px;
  width: auto;
}

.tool-controls {
  display: flex;
  gap: 0.45rem;
}

.control-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.42rem 0.68rem;
  font-size: 0.78rem;
  font-weight: 800;
  cursor: pointer;
}

.control-btn[aria-pressed="true"] {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}

.tool-main {
  padding: 1.4rem 0 2.4rem;
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-family: "Fraunces", serif;
}

.lead {
  margin: 0 0 1rem;
  color: var(--muted);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  margin-bottom: 0.9rem;
}

.card h2 {
  margin: 0 0 0.55rem;
  font-size: 1.07rem;
}

.tool-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.tool-row-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

label {
  display: grid;
  gap: 0.28rem;
  font-weight: 700;
  font-size: 0.9rem;
}

input,
select,
button,
textarea {
  font: inherit;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.55rem;
  background: var(--surface);
  color: var(--ink);
}

button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.5rem 0.85rem;
  font-weight: 700;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: transparent;
  color: #fff;
}

.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.checklist label {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 0.5rem;
  border-radius: 8px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
}

.progress-wrap {
  margin-top: 0.7rem;
}

.progress-bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #dcecff;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), #3194ff);
}

.result {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.65rem;
  color: var(--ink);
  font-weight: 700;
}

.note {
  color: var(--muted);
  font-size: 0.9rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  border: 1px solid var(--line);
  padding: 0.45rem;
  text-align: left;
}

@media (max-width: 760px) {
  .tool-row,
  .tool-row-3 {
    grid-template-columns: 1fr;
  }
}