.calc-hero { padding: 50px 0 24px; }
.calc-hero h1 { font-size: clamp(28px, 4.5vw, 42px); font-weight: 800; margin: 12px 0 10px; }
.calc-hero p { font-size: 17px; max-width: 560px; }

.calc-tabs { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.calc-tab {
  padding: 9px 16px; border-radius: 999px; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--muted); font-family: var(--font-head);
  font-weight: 600; font-size: 14px; transition: all 0.15s;
}
.calc-tab:hover { border-color: var(--primary); color: var(--fg); }
.calc-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.calc-wrap { padding-bottom: 70px; }

.calc-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
  padding: 28px; margin-bottom: 22px; scroll-margin-top: 90px;
}
.calc-head h2 { font-size: 22px; font-weight: 800; }
.calc-head p { margin-top: 4px; font-size: 14px; }

.calc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 22px 0; }
.calc-field label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); margin-bottom: 7px; }
.calc-input, .calc-select {
  display: flex; align-items: center; gap: 8px;
  border-radius: 12px; border: 1px solid var(--border-strong); background: var(--bg-2); padding: 0 14px;
}
.calc-input:focus-within, .calc-select:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,107,255,0.18); }
.calc-input input {
  flex: 1; min-width: 0; background: transparent; border: 0; color: var(--fg);
  font-size: 17px; font-family: var(--font-head); font-weight: 700; padding: 13px 0; outline: none;
}
.calc-input span { color: var(--muted); font-size: 14px; }
.calc-select select {
  flex: 1; background: transparent; border: 0; color: var(--fg); font-size: 15px; padding: 13px 0; outline: none;
  font-family: var(--font-sans); appearance: none; cursor: pointer;
}
.calc-select select option { background: var(--surface); color: var(--fg); }

.calc-btn { width: 100%; }

.calc-result { margin-top: 18px; padding: 0; max-height: 0; overflow: hidden; opacity: 0; transition: opacity 0.2s; }
.calc-result.show { max-height: 600px; opacity: 1; padding-top: 18px; border-top: 1px solid var(--border); }
.calc-big { font-family: var(--font-head); font-size: 44px; font-weight: 800; line-height: 1; }
.calc-big .calc-unit { font-size: 18px; color: var(--muted); font-weight: 600; }
.calc-label { margin-top: 8px; font-size: 14px; color: var(--muted); }
.calc-note { font-size: 12px; margin-top: 12px; }
.calc-err { color: #ff8d8d; font-size: 14px; }

.calc-macros { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 18px; }
.calc-macros .macro { border-radius: 12px; padding: 14px; text-align: center; border: 1px solid var(--border); }
.calc-macros .macro strong { display: block; font-family: var(--font-head); font-size: 22px; }
.calc-macros .macro span { font-size: 12px; color: var(--muted); }
.calc-macros .p { background: rgba(47,107,255,0.12); }
.calc-macros .c { background: rgba(124,252,155,0.10); }
.calc-macros .f { background: rgba(255,209,102,0.10); }

.calc-cta-band {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  background: linear-gradient(135deg, var(--primary), #1740b8); border-radius: 20px; padding: 28px 30px; margin-top: 10px;
}
.calc-cta-band h3 { font-size: 22px; font-weight: 800; }
.calc-cta-band p { opacity: 0.92; }
.calc-cta-band .btn-primary { background: #fff; color: var(--primary); box-shadow: none; }
.calc-cta-band .btn-primary:hover { background: #eaf0ff; }

.calc-disclaimer { font-size: 12px; color: var(--muted); opacity: 0.7; margin-top: 22px; text-align: center; }

@media (max-width: 560px) {
  .calc-grid { grid-template-columns: 1fr; }
  .calc-card { padding: 22px; }
}