:root {
  color-scheme: light;
  --ink: #1d2433;
  --muted: #657085;
  --paper: #fbfaf6;
  --panel: #ffffff;
  --line: #dfe3ea;
  --blue: #2764d8;
  --blue-dark: #17428f;
  --green: #1f8f62;
  --red: #c23a3a;
  --gold: #d89522;
  --shadow: 0 18px 45px rgba(36, 44, 62, 0.16);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
}

.hero {
  position: relative;
  min-height: clamp(360px, 56vh, 560px);
  display: grid;
  align-items: center;
  overflow: hidden;
  background: #26334a;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  background:
    linear-gradient(90deg, rgba(12, 18, 31, 0.86) 0%, rgba(12, 18, 31, 0.64) 42%, rgba(12, 18, 31, 0.1) 100%),
    linear-gradient(0deg, rgba(12, 18, 31, 0.22), rgba(12, 18, 31, 0.08));
}

.hero-content {
  position: relative;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  color: white;
  padding: 48px 0 72px;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 800;
  color: #ffcf66;
}

h1 {
  margin: 0;
  max-width: 620px;
  font-size: clamp(3rem, 8vw, 6.7rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.count-card {
  margin-top: 28px;
  width: min(620px, 100%);
  display: flex;
  align-items: end;
  gap: 14px;
  padding: 18px 22px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.count {
  font-size: clamp(3rem, 8vw, 5.6rem);
  line-height: 0.85;
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.count-label {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 750;
}

.precise-countdown {
  margin: 14px 0 0;
  color: #ffcf66;
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.range-summary {
  min-height: 1.5em;
  max-width: 640px;
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 1rem;
}

.workspace {
  width: min(1120px, calc(100% - 32px));
  margin: -42px auto 64px;
  position: relative;
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
}

.settings-panel,
.results-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.settings-panel {
  padding: 22px;
}

.results-panel {
  padding: 22px;
}

.panel-header,
.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

h2 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.2;
}

h3 {
  margin: 24px 0 10px;
  font-size: 0.95rem;
  line-height: 1.2;
}

.icon-button {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  display: inline-grid;
  place-items: center;
  cursor: pointer;
  font-size: 1.45rem;
  line-height: 1;
}

.icon-button:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.field,
.toggle-row {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  padding: 11px 12px;
}

.config-list {
  margin: 18px 0 0;
  display: grid;
  gap: 14px;
}

.config-list div {
  display: grid;
  gap: 4px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.config-list dt {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

.config-list dd {
  margin: 0;
  font-weight: 800;
}

.date-list {
  margin-bottom: 1;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

.date-list li {
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.field textarea {
  min-height: 160px;
  resize: vertical;
  line-height: 1.45;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86rem;
}

.toggle-row {
  grid-template-columns: 20px 1fr;
  align-items: center;
  color: var(--ink);
}

.weekday-grid {
  margin: 18px 0 0;
  padding: 12px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.weekday-grid legend {
  padding: 0 6px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.weekday-grid label {
  display: grid;
  justify-items: center;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 700;
}

.preset-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 18px;
}

.secondary-button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f5f7fb;
  color: var(--ink);
  cursor: pointer;
  font-weight: 750;
}

.secondary-button:hover {
  border-color: var(--blue);
  color: var(--blue-dark);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.metric {
  min-height: 94px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  display: grid;
  align-content: center;
  gap: 6px;
}

.metric-value {
  font-size: clamp(1.4rem, 3vw, 2rem);
  line-height: 1;
  font-weight: 850;
  color: var(--blue-dark);
}

.metric-label {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 750;
}

.calendar-header {
  margin-bottom: 14px;
}

.calendar-weekdays,
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.calendar-weekdays span {
  padding: 0 4px 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-align: center;
}

.calendar-grid {
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.day-cell {
  min-height: 86px;
  padding: 9px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: white;
  display: grid;
  align-content: start;
  gap: 6px;
}

.day-cell.outside {
  background: #f3f5f8;
  color: #a0a8b6;
}

.day-cell.school-day {
  background: #eef8f2;
}

.day-cell.day-off {
  background: #fff7e6;
}

.day-cell.today {
  outline: 3px solid var(--blue);
  outline-offset: -3px;
}

.day-number {
  font-weight: 850;
}

.day-note {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 700;
}

.validation {
  min-height: 1.4em;
  margin: 14px 0 0;
  color: var(--red);
  font-weight: 700;
}

@media (max-width: 860px) {
  .workspace {
    grid-template-columns: 1fr;
    margin-top: -30px;
  }

  .metric-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .hero {
    min-height: 430px;
  }

  .hero-content {
    width: min(100% - 28px, 1120px);
    padding-bottom: 58px;
  }

  .count-card {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .workspace {
    width: min(100% - 20px, 1120px);
  }

  .preset-row {
    grid-template-columns: 1fr;
  }

  .weekday-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .day-cell {
    min-height: 62px;
    padding: 6px;
  }

  .day-note {
    display: none;
  }
}