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

:root {
  --bg: #050911;
  --surface: rgba(255, 255, 255, 0.038);
  --surface-hover: rgba(255, 255, 255, 0.065);
  --surface-raised: rgba(255, 255, 255, 0.055);
  --border: rgba(255, 255, 255, 0.085);
  --border-light: rgba(255, 255, 255, 0.05);
  --border-focus: rgba(68, 136, 255, 0.6);
  --text-primary: #eaf0ff;
  --text-secondary: #7a8fb0;
  --text-muted: #374a65;
  --accent: #4488ff;
  --accent-dim: rgba(68, 136, 255, 0.13);
  --accent-glow: rgba(68, 136, 255, 0.22);
  --cyan: #00ccff;
  --green: #0de8a0;
  --green-dim: rgba(13, 232, 160, 0.1);
  --red: #ff5566;
  --yellow: #ffc844;
  --info-text: #5ba3ff;
  --info-bg: rgba(68, 136, 255, 0.08);
  --info-border: rgba(68, 136, 255, 0.22);
  --neutral-bg: rgba(255, 255, 255, 0.028);
  --neutral-border: rgba(255, 255, 255, 0.072);
  --r: 16px;
  --r-sm: 10px;
  --r-xs: 7px;
  --ease: 0.18s ease;
  --font-ui: 'Syne', sans-serif;
  --font-body: 'Figtree', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type="number"] {
  -moz-appearance: textfield;
}

.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(130px);
  pointer-events: none;
}

.bg-blob-1 {
  width: 600px;
  height: 600px;
  top: -120px;
  left: -80px;
  background: radial-gradient(circle, rgba(60, 110, 255, 0.09) 0%, transparent 70%);
}

.bg-blob-2 {
  width: 500px;
  height: 500px;
  top: 40%;
  right: -100px;
  background: radial-gradient(circle, rgba(0, 180, 255, 0.07) 0%, transparent 70%);
}

.bg-blob-3 {
  width: 400px;
  height: 400px;
  bottom: 5%;
  left: 35%;
  background: radial-gradient(circle, rgba(90, 50, 255, 0.05) 0%, transparent 70%);
}

header {
  position: relative;
  z-index: 10;
  padding: 0 28px;
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(5, 9, 17, 0.72);
}

.header-inner {
  max-width: 920px;
  margin: 0 auto;
  height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-ui);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.logo .logo-hi {
  color: var(--accent);
}

.header-pill {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 4px 11px;
  border-radius: 20px;
}

main {
  flex: 1;
  position: relative;
  z-index: 1;
  padding: 44px 28px 70px;
}

.container {
  max-width: 920px;
  margin: 0 auto;
}

.page-title {
  font-family: var(--font-ui);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 6px;
}

.page-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 30px;
}

.info-stack {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 30px;
}

.info-banner {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 13px 16px;
  border-radius: var(--r-sm);
  font-size: 0.865rem;
  line-height: 1.55;
  border: 1px solid;
}

.info-banner.type-info {
  background: var(--info-bg);
  border-color: var(--info-border);
  color: var(--info-text);
}

.info-banner.type-neutral {
  background: var(--neutral-bg);
  border-color: var(--neutral-border);
  color: var(--text-secondary);
}

.info-banner svg {
  flex-shrink: 0;
  margin-top: 2px;
}

.info-banner a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
  opacity: 0.85;
  transition: opacity var(--ease);
}

.info-banner a:hover {
  opacity: 1;
}

.info-banner strong {
  color: var(--text-primary);
  font-weight: 600;
}

.info-banner.type-neutral strong {
  color: var(--text-primary);
}

.info-banner-body {
  flex: 1;
}

.tabs-wrap {
  display: flex;
  gap: 4px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border);
  border-radius: 11px;
  padding: 4px;
  margin-bottom: 26px;
  width: fit-content;
}

.tab-btn {
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  padding: 9px 22px;
  border-radius: 7px;
  cursor: pointer;
  transition: color var(--ease), background var(--ease);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.tab-btn:hover {
  color: var(--text-primary);
  background: var(--surface-hover);
}

.tab-btn.active {
  color: var(--text-primary);
  background: var(--accent-dim);
  box-shadow: 0 0 0 1px rgba(68, 136, 255, 0.28);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: slideUp 0.22s ease both;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: translateY(0); }
}

.rate-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.rate-card {
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.rate-card.hl {
  background: var(--accent-dim);
  border-color: rgba(68, 136, 255, 0.28);
}

.rate-card-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 5px;
}

.rate-card.hl .rate-card-label {
  color: rgba(91, 163, 255, 0.8);
}

.rate-card-val {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.rate-card.hl .rate-card-val {
  color: var(--accent);
}

.glass-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 26px;
  margin-bottom: 18px;
}

.card-head {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 22px;
}

.card-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--accent-dim);
  border: 1px solid rgba(68, 136, 255, 0.2);
  color: var(--accent);
}

.card-icon.green {
  background: var(--green-dim);
  border-color: rgba(13, 232, 160, 0.2);
  color: var(--green);
}

.card-title {
  font-family: var(--font-ui);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.015em;
  line-height: 1.2;
}

.card-subtitle {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.fx-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.77rem;
  color: var(--text-secondary);
  margin-bottom: 18px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.status-dot.loading {
  background: var(--yellow);
  animation: blink 0.9s infinite;
}

.status-dot.ok {
  background: var(--green);
}

.status-dot.err {
  background: var(--yellow);
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
}

.f-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.f-label {
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.045em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

input[type="number"],
input[type="text"],
select {
  background: rgba(255, 255, 255, 0.044);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.93rem;
  padding: 10px 13px;
  width: 100%;
  transition: border-color var(--ease), background var(--ease);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

input::placeholder {
  color: var(--text-muted);
}

input:focus,
select:focus {
  border-color: var(--border-focus);
  background: rgba(68, 136, 255, 0.06);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='11' height='7' viewBox='0 0 11 7'%3E%3Cpath d='M1 1l4.5 4.5L10 1' stroke='%237a8fb0' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  padding-right: 34px;
  cursor: pointer;
  background-color: rgba(255, 255, 255, 0.044);
}

select option {
  background: #0c1526;
  color: var(--text-primary);
}

select optgroup {
  color: var(--text-secondary);
  font-size: 0.8rem;
}

.sub-input {
  margin-top: 7px;
  animation: slideUp 0.15s ease;
}

.divider {
  height: 1px;
  background: var(--border);
  margin: 18px 0;
}

.toggle-list {
  display: flex;
  flex-direction: column;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

.toggle-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.toggle-info {
  flex: 1;
  min-width: 0;
}

.toggle-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-primary);
  line-height: 1.3;
}

.toggle-desc {
  font-size: 0.76rem;
  color: var(--text-secondary);
  margin-top: 2px;
  line-height: 1.4;
}

.sw {
  position: relative;
  width: 42px;
  height: 23px;
  flex-shrink: 0;
}

.sw input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.sw-track {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.sw input:checked + .sw-track {
  background: var(--accent);
  border-color: var(--accent);
}

.sw-track::after {
  content: '';
  position: absolute;
  width: 15px;
  height: 15px;
  background: white;
  border-radius: 50%;
  top: 3px;
  left: 3px;
  transition: transform 0.18s ease;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.35);
}

.sw input:checked + .sw-track::after {
  transform: translateX(19px);
}

.fx-panel {
  display: none;
  margin-top: 11px;
  padding: 14px 15px;
  background: rgba(68, 136, 255, 0.06);
  border: 1px solid rgba(68, 136, 255, 0.16);
  border-radius: var(--r-sm);
  animation: slideUp 0.18s ease;
}

.fx-panel.show {
  display: block;
}

.fx-panel-label {
  font-size: 0.76rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  font-weight: 500;
}

.chip-group {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

.chip {
  position: relative;
}

.chip input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.chip label {
  display: block;
  padding: 5px 13px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--ease);
  text-transform: none;
  letter-spacing: 0;
  white-space: nowrap;
}

.chip input:checked + label {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: rgba(68, 136, 255, 0.4);
}

.chip label:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.18);
}

.mode-bar {
  display: flex;
  gap: 3px;
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 3px;
  margin-bottom: 18px;
  width: fit-content;
}

.mode-btn {
  font-family: var(--font-body);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  padding: 7px 17px;
  border-radius: 6px;
  cursor: pointer;
  transition: color var(--ease), background var(--ease);
  white-space: nowrap;
}

.mode-btn.active {
  color: var(--text-primary);
  background: var(--surface-raised);
}

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.btn-calc {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: white;
  background: var(--accent);
  border: none;
  border-radius: var(--r-sm);
  padding: 11px 24px;
  cursor: pointer;
  transition: background var(--ease), transform var(--ease), box-shadow var(--ease);
  margin-top: 18px;
  letter-spacing: 0.01em;
}

.btn-calc:hover {
  background: #5c97ff;
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(68, 136, 255, 0.28);
}

.btn-calc:active {
  transform: translateY(0);
}

.btn-calc.green {
  background: #0bc492;
}

.btn-calc.green:hover {
  background: #0de8a0;
  box-shadow: 0 8px 28px rgba(13, 232, 160, 0.25);
}

.results-wrap {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  margin-bottom: 18px;
  animation: slideUp 0.22s ease;
}

.results-head {
  padding: 12px 20px;
  border-bottom: 1px solid var(--border);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

.result-hero {
  padding: 22px 20px 18px;
  border-bottom: 1px solid var(--border);
}

.result-hero-label {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.result-hero-val {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 500;
  color: var(--green);
  letter-spacing: -0.025em;
  line-height: 1;
}

.result-hero-sub {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 7px;
}

.result-rows {
  padding: 14px 20px;
}

.r-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.032);
  font-size: 0.85rem;
}

.r-row:last-child {
  border-bottom: none;
}

.r-row-lbl {
  color: var(--text-secondary);
}

.r-row-val {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-primary);
}

.r-row-val.neg {
  color: var(--red);
}

.r-row-val.pos {
  color: var(--green);
}

.disclaimer-box {
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.018);
  border: 1px solid var(--border-light);
  border-radius: var(--r-sm);
  font-size: 0.77rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 18px;
}

footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-light);
  padding: 22px 28px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(5, 9, 17, 0.6);
}

.footer-inner {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--ease);
}

.footer-links a:hover {
  color: var(--text-secondary);
}

.page-404-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 1;
  padding: 48px 28px;
}

.page-404-inner {
  text-align: center;
  max-width: 380px;
}

.err-num {
  font-family: var(--font-mono);
  font-size: 6rem;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.05em;
  background: linear-gradient(135deg, var(--accent) 30%, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.err-title {
  font-family: var(--font-ui);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.err-sub {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.6;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  background: var(--accent-dim);
  border: 1px solid rgba(68, 136, 255, 0.28);
  padding: 10px 22px;
  border-radius: var(--r-sm);
  transition: background var(--ease), transform var(--ease);
  letter-spacing: 0.01em;
}

.btn-back:hover {
  background: rgba(68, 136, 255, 0.2);
  transform: translateY(-1px);
}

@media (max-width: 640px) {
  main {
    padding: 32px 18px 56px;
  }

  header {
    padding: 0 18px;
  }

  footer {
    padding: 20px 18px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .rate-row {
    grid-template-columns: 1fr 1fr;
  }

  .rate-row .rate-card:nth-child(3) {
    grid-column: 1 / -1;
  }

  .result-hero-val {
    font-size: 1.6rem;
  }

  .page-title {
    font-size: 1.6rem;
  }

  .tabs-wrap {
    width: 100%;
  }

  .tab-btn {
    flex: 1;
    text-align: center;
  }
}