:root {
  color-scheme: light;
  --bg: #f7f7f6;
  --panel: #ffffff;
  --ink: #343638;
  --muted: #6d6e70;
  --line: #ddd9d2;
  --accent: #ffc978;
  --accent-strong: #f1ad4f;
  --accent-soft: #fff4df;
  --gray-soft: #f0f0ef;
  --warning: #9d620e;
  --shadow: 0 18px 50px rgba(78, 78, 78, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(247, 247, 246, 0.96)),
    var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input {
  font: inherit;
}

.app-shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(18px, 4vh, 36px) 0;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: clamp(14px, 3vh, 22px);
}

.brand-block {
  display: grid;
  gap: clamp(6px, 1.4vh, 10px);
}

.brand-logo {
  display: block;
  width: clamp(160px, 18vw, 210px);
  height: auto;
  object-fit: contain;
}

.eyebrow {
  margin: 2px 0 -4px;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.85rem, 4vw, 2.3rem);
  line-height: 1.08;
}

.clock {
  min-width: 168px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  text-align: right;
}

.clock-label,
.result-label,
.metric span,
.result-note {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.clock strong {
  display: block;
  margin-top: 2px;
  font-size: 1.12rem;
}

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

.tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-bottom: 1px solid var(--line);
  background: var(--gray-soft);
}

.tab {
  min-height: clamp(48px, 7vh, 56px);
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
}

.tab:last-child {
  border-right: 0;
}

.tab:hover {
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
}

.tab.is-active {
  background: var(--panel);
  color: var(--ink);
  box-shadow: inset 0 4px 0 var(--accent);
}

.tab-panel {
  padding: clamp(18px, 3.6vh, 28px);
}

.calculator {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: clamp(14px, 2.4vw, 18px);
  align-items: end;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: #4b4c4e;
  font-size: 0.92rem;
  font-weight: 750;
}

input {
  width: 100%;
  min-height: clamp(46px, 6.5vh, 50px);
  border: 1px solid #d7d4cf;
  border-radius: 8px;
  background: #fbfcfb;
  color: var(--ink);
  padding: 0 14px;
  outline: none;
}

input:focus {
  border-color: var(--accent-strong);
  box-shadow: 0 0 0 4px rgba(255, 201, 120, 0.3);
}

.primary-action {
  min-height: clamp(46px, 6.5vh, 50px);
  border: 0;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  cursor: pointer;
  font-weight: 850;
  padding: 0 20px;
  white-space: nowrap;
}

.primary-action:hover {
  background: #515356;
}

.result,
.summary-grid {
  margin-top: clamp(16px, 3vh, 24px);
}

.result {
  padding: clamp(16px, 3vh, 22px);
  border: 1px solid #efd39f;
  border-left: 6px solid var(--accent);
  border-radius: 8px;
  background: linear-gradient(90deg, var(--accent-soft), #ffffff);
}

.result strong {
  display: block;
  margin: 6px 0;
  font-size: clamp(1.35rem, 3.8vw, 1.9rem);
  line-height: 1.14;
}

.result-note.is-warning,
.metric strong.is-warning {
  color: var(--warning);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.metric {
  min-height: 104px;
  padding: clamp(16px, 2.8vh, 20px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #faf9f7);
}

.metric:nth-child(2) {
  border-color: #efd39f;
  background: var(--accent-soft);
}

.metric-wide {
  grid-column: 1 / -1;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  line-height: 1.18;
}

.app-footer {
  margin-top: clamp(12px, 2.4vh, 18px);
  color: var(--muted);
  font-size: 0.86rem;
  text-align: center;
}

.app-footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .app-shell {
    width: min(100% - 20px, 960px);
    padding: 14px 0;
  }

  .app-header,
  .calculator,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .app-header {
    display: grid;
    align-items: stretch;
    gap: 12px;
    margin-bottom: 14px;
  }

  .brand-logo {
    width: clamp(150px, 48vw, 180px);
  }

  h1 {
    font-size: clamp(1.55rem, 8vw, 1.85rem);
  }

  .clock {
    min-width: 0;
    padding: 10px 12px;
    text-align: left;
  }

  .tab {
    min-height: 48px;
    font-size: 0.95rem;
  }

  .tab-panel {
    padding: 16px;
  }

  .field {
    gap: 6px;
  }

  input,
  .primary-action {
    min-height: 46px;
  }

  .result,
  .summary-grid {
    margin-top: 16px;
  }

  .metric {
    min-height: auto;
  }

  .primary-action {
    width: 100%;
  }

  .result strong,
  .metric strong {
    font-size: 1.24rem;
  }
}

@media (max-height: 700px) and (min-width: 761px) {
  .brand-logo {
    width: 176px;
  }

  .eyebrow {
    font-size: 0.78rem;
  }

  h1 {
    font-size: 1.95rem;
  }

  .clock {
    padding: 10px 12px;
  }

  .tab-panel {
    padding: 18px;
  }

  .result {
    padding: 16px;
  }

  .metric {
    min-height: 92px;
  }
}

@media (max-width: 760px) and (max-height: 740px) {
  .app-shell {
    padding: 10px 0;
  }

  .app-header {
    gap: 8px;
    margin-bottom: 10px;
  }

  .brand-block {
    gap: 5px;
  }

  .brand-logo {
    width: 150px;
  }

  .eyebrow {
    font-size: 0.76rem;
  }

  h1 {
    font-size: 1.46rem;
  }

  .clock {
    padding: 8px 10px;
  }

  .clock strong {
    font-size: 1rem;
  }

  .tab {
    min-height: 42px;
  }

  .tab-panel {
    padding: 12px;
  }

  input,
  .primary-action {
    min-height: 42px;
  }

  .result {
    padding: 12px;
  }

  .app-footer {
    margin-top: 10px;
  }
}