.calc-page { max-width: 900px; margin: 0 auto; padding: 40px 24px 80px; }

.calc-hero { text-align: center; margin-bottom: 40px; }
.calc-hero h1 { font-family: 'JetBrains Mono', monospace; font-size: clamp(1.6rem, 3.5vw, 2.4rem); font-weight: 800; letter-spacing: -1px; color: var(--text); margin-bottom: 8px; }
.calc-hero h1 span { color: #fa6400; }
.calc-hero p { font-size: 1rem; color: var(--text-muted); max-width: 500px; margin: 0 auto; }

.calc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 32px; }

.calc-card { background: var(--bg-card); border: 1.5px solid var(--border); border-radius: 14px; padding: 24px; }
.calc-card h2 { font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: #fa6400; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.calc-card h2 svg { flex-shrink: 0; }

.field { margin-bottom: 18px; }
.field:last-child { margin-bottom: 0; }
.field label { display: block; font-size: 0.8rem; font-weight: 600; color: var(--text-dim); margin-bottom: 6px; letter-spacing: 0.3px; }
.field input, .field select {
  width: 100%; height: 42px; padding: 0 14px;
  background: var(--bg-input, var(--bg-tag)); border: 1.5px solid var(--border); border-radius: 10px;
  font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; font-weight: 500; color: var(--text);
  outline: none; transition: border-color 0.15s;
}
.field input:focus, .field select:focus { border-color: #fa6400; }
.field select { cursor: pointer; -webkit-appearance: none; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.field .unit { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 0.75rem; color: var(--text-muted); font-weight: 600; pointer-events: none; }
.field .input-wrap { position: relative; }
.field input[type="range"] { height: auto; padding: 0; border: none; background: none; -webkit-appearance: auto; appearance: auto; accent-color: #fa6400; }
.range-row { display: flex; align-items: center; gap: 12px; }
.range-row input { flex: 1; }
.range-val { font-family: 'JetBrains Mono', monospace; font-size: 0.9rem; font-weight: 700; color: #fa6400; min-width: 50px; text-align: right; }

/* Results */
.calc-results { background: var(--bg-card); border: 2px solid #fa6400; border-radius: 14px; padding: 28px; }
.calc-results h2 { font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: #fa6400; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }

.result-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.result-item { background: var(--bg-tag); border-radius: 10px; padding: 16px; text-align: center; }
.result-value { font-family: 'JetBrains Mono', monospace; font-size: 1.6rem; font-weight: 800; color: var(--text); line-height: 1; }
.result-value.accent { color: #fa6400; }
.result-label { font-size: 0.7rem; font-weight: 600; letter-spacing: 1px; text-transform: uppercase; color: var(--text-muted); margin-top: 6px; }

.calc-note { margin-top: 24px; font-size: 0.8rem; color: var(--text-muted); line-height: 1.6; text-align: center; }
.calc-note a { color: #fa6400; font-weight: 600; }

/* Preset chips */
.presets { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.preset-chip { padding: 6px 14px; background: var(--bg-tag); border: 1.5px solid var(--border); border-radius: 20px; font-size: 0.75rem; font-weight: 600; color: var(--text-dim); cursor: pointer; transition: all 0.15s; font-family: 'Figtree', sans-serif; }
.preset-chip:hover { border-color: #fa6400; color: #fa6400; }
.preset-chip.active { background: rgba(250,100,0,0.1); border-color: #fa6400; color: #fa6400; }

@media (max-width: 640px) {
  .calc-grid { grid-template-columns: 1fr; }
  .calc-page { padding: 20px 14px 60px; }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
}


/* Mobile Header Fixes */
@media(max-width:640px) {
  .header { height: auto; min-height: 56px; }
  .header-inner { flex-wrap: wrap; padding: 6px 12px; height: auto; gap: 0; }
  .header-search {
    order: 4; width: 100%; max-width: unset;
    margin: 8px 0 12px 0; flex-basis: 100%;
  }
  .header-search input { height: 48px; font-size: 16px; border-radius: 12px; }
  .login-btn { height: 36px !important; width: 36px !important; padding: 0 !important; border-radius: 50% !important; display: flex !important; align-items: center !important; justify-content: center !important; }
  .login-text { display: none !important; }
}

@media(max-width:640px) {
  .header-actions .lang-select { display: block !important; font-size: 11px; padding: 0 4px; height: 32px; max-width: 52px; }
}