*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --wood-dark: #2c1a0e;
  --wood-mid: #7c4a1e;
  --wood-light: #c8874a;
  --wood-pale: #f0d9bc;
  --cream: #faf6ef;
  --ink: #1a1008;
  --accent: #d4622a;
  --grain: rgba(90,40,10,0.04);
  --shadow: 0 4px 24px rgba(44,26,14,0.12);
}

body {
  font-family: 'DM Mono', monospace;
  background-color: var(--cream);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 40px 16px 60px;
  background-image:
    repeating-linear-gradient(
      92deg,
      transparent,
      transparent 38px,
      var(--grain) 38px,
      var(--grain) 40px
    ),
    repeating-linear-gradient(
      180deg,
      transparent,
      transparent 18px,
      rgba(90,40,10,0.025) 18px,
      rgba(90,40,10,0.025) 20px
    );
}

.card {
  width: 100%;
  max-width: 520px;
  background: #fff;
  border-radius: 4px;
  border: 1.5px solid var(--wood-pale);
  box-shadow: var(--shadow), 0 1px 0 var(--wood-light) inset;
  overflow: hidden;
  animation: rise 0.5s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.header {
  background: var(--wood-dark);
  padding: 28px 32px 24px;
  border-bottom: 3px solid var(--wood-light);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    88deg,
    transparent,
    transparent 22px,
    rgba(255,255,255,0.03) 22px,
    rgba(255,255,255,0.03) 24px
  );
  pointer-events: none;
}

.header-label {
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--wood-light);
  margin-bottom: 6px;
}

.header h1 {
  font-family: 'Playfair Display', serif;
  font-size: 26px;
  color: var(--cream);
  line-height: 1.2;
}

.header h1 span {
  color: var(--wood-light);
}

.body {
  padding: 28px 32px;
}

.field-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wood-mid);
  margin-bottom: 7px;
  font-weight: 500;
}

.input-row {
  display: flex;
  gap: 8px;
}

input[type="text"],
input[type="number"],
select {
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  padding: 10px 14px;
  border: 1.5px solid var(--wood-pale);
  border-radius: 3px;
  background: var(--cream);
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  width: 100%;
}

input:focus, select:focus {
  border-color: var(--wood-mid);
  box-shadow: 0 0 0 3px rgba(124,74,30,0.1);
}

input.error {
  border-color: var(--accent);
  background: #fff5f2;
}

select {
  cursor: pointer;
  flex-shrink: 0;
  width: auto;
  padding-right: 10px;
}

.hint {
  font-size: 10px;
  color: #b08060;
  margin-top: 5px;
  letter-spacing: 0.04em;
}

.divider {
  border: none;
  border-top: 1px solid var(--wood-pale);
  margin: 22px 0;
}

.calc-btn {
  width: 100%;
  padding: 14px;
  background: var(--wood-dark);
  color: var(--cream);
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  position: relative;
  overflow: hidden;
}

.calc-btn:hover { background: var(--wood-mid); }
.calc-btn:active { transform: scale(0.99); }

.calc-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 10px,
    rgba(255,255,255,0.02) 10px,
    rgba(255,255,255,0.02) 12px
  );
}

#result {
  margin-top: 22px;
  animation: fadein 0.35s ease both;
}

@keyframes fadein {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.result-box {
  background: var(--wood-dark);
  border-radius: 3px;
  padding: 20px 24px;
  border-left: 4px solid var(--wood-light);
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 5px 0;
}

.result-row + .result-row {
  border-top: 1px solid rgba(200,135,74,0.15);
}

.result-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wood-light);
}

.result-value {
  font-size: 15px;
  color: var(--cream);
  font-weight: 500;
}

.result-value.big {
  font-family: 'Playfair Display', serif;
  font-size: 28px;
  color: #fff;
}

.error-msg {
  margin-top: 12px;
  padding: 10px 14px;
  background: #fff0ed;
  border: 1.5px solid #f4b8a8;
  border-radius: 3px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.footer {
  padding: 12px 32px 16px;
  border-top: 1px solid var(--wood-pale);
  font-size: 10px;
  color: #c0a080;
  letter-spacing: 0.08em;
}

.reset-btn {
  width: 100%;
  margin-top: 10px;
  padding: 11px;
  background: transparent;
  color: var(--wood-mid);
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1.5px solid var(--wood-pale);
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.reset-btn:hover {
  background: var(--wood-pale);
  border-color: var(--wood-light);
  color: var(--wood-dark);
}


.clear-btn {
  width: 100%;
  margin-top: 10px;
  padding: 11px;
  background: transparent;
  color: var(--accent);
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border: 1.5px solid #f4b8a8;
  border-radius: 3px;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.clear-btn:hover {
  background: #fff0ed;
  border-color: var(--accent);
}

.history-box {
  margin-top: 22px;
}

.history-title {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wood-mid);
  margin-bottom: 10px;
  font-weight: 500;
}

.history-item {
  background: var(--cream);
  border: 1.5px solid var(--wood-pale);
  border-radius: 3px;
  padding: 10px 14px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--ink);
}

.history-item-label {
  color: var(--wood-mid);
}

.history-total {
  background: var(--wood-pale);
  border-radius: 3px;
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 4px;
}

.history-total-label {
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wood-mid);
  font-weight: 500;
}

.history-total-value {
  font-family: 'Playfair Display', serif;
  font-size: 22px;
  color: var(--wood-dark);
}

.back-link {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--wood-light);
  text-decoration: none;
  margin-bottom: 12px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--cream);
}