:root {
  --bg-main: #020617;
  --bg-card: #020617;
  --bg-card-soft: rgba(15, 23, 42, 0.95);
  --border-soft: rgba(148, 163, 184, 0.5);
  --accent: #8b5cf6;
  --accent-soft: rgba(139, 92, 246, 0.2);
  --accent-strong: #f97316;
  --text-main: #e5e7eb;
  --text-muted: #9ca3af;
  --danger: #f97373;
  --success: #22c55e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Mulish", sans-serif;
  background:
    radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.06), transparent 55%),
    radial-gradient(circle at 100% 0%, rgba(244, 114, 182, 0.06), transparent 55%),
    radial-gradient(circle at 50% 100%, rgba(129, 140, 248, 0.09), transparent 55%),
    var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.one-section {
  margin-bottom: 24px;
}

.page-title {
  font-size: 28px;
  line-height: 1.3;
  margin-bottom: 6px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 620px;
}

.calculator-shell {
  margin-top: 24px;
  border-radius: 24px;
  background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.09), transparent 60%),
              radial-gradient(circle at bottom right, rgba(139, 92, 246, 0.12), transparent 65%),
              linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(2, 6, 23, 0.98));
  border: 1px solid rgba(148, 163, 184, 0.55);
  box-shadow:
    0 0 0 1px rgba(15, 23, 42, 0.9),
    0 22px 60px rgba(15, 23, 42, 0.95);
  padding: 20px 18px 22px;
}

.calc-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.4fr);
  gap: 18px;
}

.calc-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card {
  background: radial-gradient(circle at top, rgba(15, 23, 42, 0.85), rgba(2, 6, 23, 0.98));
  border-radius: 18px;
  padding: 14px 14px 16px;
  border: 1px solid rgba(51, 65, 85, 0.9);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.85);
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.card-caption {
  font-size: 11px;
  color: var(--text-muted);
  opacity: 0.9;
}

.badge {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: var(--text-muted);
  white-space: nowrap;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 12px;
}

.form-row-full {
  grid-column: 1 / -1;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
}

.field-label {
  display: flex;
  justify-content: space-between;
  gap: 6px;
  color: var(--text-muted);
}

.field-label-main {
  opacity: 0.95;
}

.field-label-note {
  font-size: 10px;
  opacity: 0.8;
}

.field-input-wrap {
  position: relative;
}

input[type="number"] {
  width: 100%;
  padding: 7px 10px;
  border-radius: 10px;
  border: 1px solid rgba(51, 65, 85, 0.95);
  background: rgba(15, 23, 42, 0.95);
  color: var(--text-main);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

input[type="number"]:focus {
  border-color: rgba(129, 140, 248, 0.9);
  box-shadow: 0 0 0 1px rgba(129, 140, 248, 0.35);
  background: rgba(15, 23, 42, 1);
}

.input-suffix {
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  color: var(--text-muted);
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(15, 23, 42, 0.95));
  padding-left: 8px;
}

.small-hint {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
  opacity: 0.9;
}

.warning-text {
  font-size: 11px;
  color: var(--danger);
  margin-top: 4px;
}

.results-main {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  font-size: 12px;
  margin-top: 4px;
}

.result-block {
  padding: 8px 8px 9px;
  border-radius: 12px;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.22), transparent 65%),
    rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(55, 65, 81, 0.95);
}

.result-block.compact {
  background:
    radial-gradient(circle at top left, rgba(244, 114, 182, 0.2), transparent 65%),
    rgba(15, 23, 42, 0.9);
}

.result-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.result-value {
  font-size: 13px;
  font-weight: 600;
}

.result-sub {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 1px;
}

.results-footer {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed rgba(75, 85, 99, 0.8);
  font-size: 11px;
  color: var(--text-muted);
}

.profit-positive {
  color: var(--success);
}

.profit-negative {
  color: var(--danger);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.tag {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  color: var(--text-muted);
}

.tag-good {
  border-color: rgba(34, 197, 94, 0.7);
  color: var(--success);
  background: rgba(22, 163, 74, 0.06);
}

.tag-risk {
  border-color: rgba(248, 113, 113, 0.85);
  color: var(--danger);
  background: rgba(127, 29, 29, 0.08);
}

.subtitle-note {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
}

.scenario-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
}

.scenario-btn {
  font-size: 10px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.12s ease;
}

.scenario-btn:hover {
  border-color: rgba(129, 140, 248, 0.9);
  background: radial-gradient(circle at top, rgba(129, 140, 248, 0.18), rgba(15, 23, 42, 0.98));
  transform: translateY(-1px);
}

.scenario-btn.active {
  border-color: rgba(129, 140, 248, 1);
  background: linear-gradient(135deg, rgba(129, 140, 248, 0.22), rgba(30, 64, 175, 0.85));
}

.help-block {
  margin-top: 16px;
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.5;
}

.help-block p {
  margin: 0 0 4px;
}

.help-block strong {
  color: #e5e7eb;
  font-weight: 600;
}

.help-list {
  margin: 4px 0 0 0;
  padding-left: 16px;
}

.help-list li {
  margin-bottom: 3px;
}

@media (max-width: 980px) {
  .page {
    padding: 18px 12px 36px;
  }

  .page-title {
    font-size: 23px;
  }

  .calculator-shell {
    padding: 14px 12px 16px;
  }

  .calc-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .results-main {
    grid-template-columns: minmax(0, 1fr);
  }

  .card {
    padding: 12px 10px 13px;
  }
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}