/* ─── Tokens ─────────────────────────────────────────────── */
:root {
  --bg:            #05060a;
  --surface:       #0c0d12;
  --surface-2:     #11131a;
  --surface-3:     #181b24;
  --border:        rgba(255,255,255,.06);
  --border-soft:   rgba(255,255,255,.04);

  --text:          #f0f0ee;
  --text-2:        #8a8f9a;
  --text-3:        #52576a;

  --nbe:           #2dd98a;
  --nbe-dim:       rgba(45,217,138,.12);
  --tbc:           #38c4f5;
  --tbc-dim:       rgba(56,196,245,.12);

  --iris-1:        #2dd98a;
  --iris-2:        #19d6c7;
  --iris-3:        #38c4f5;
  --iris-grad:     linear-gradient(135deg, var(--iris-1), var(--iris-2) 48%, var(--iris-3));

  --warn:          #f0c060;

  --radius-sm:     6px;
  --radius:        10px;
  --radius-lg:     16px;
  --radius-xl:     22px;

  --font-body:     'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono:     'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
}

/* ─── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; }

html { -webkit-font-smoothing: antialiased; }

body {
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.5;
}

button, input { font: inherit; }
button { border: 0; cursor: pointer; }
a { color: var(--text-2); text-decoration: none; }
a:hover { color: var(--text); }

/* ─── Grain + Ambient texture ────────────────────────────── */
.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  opacity: .028;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

.ambient {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 60% 40% at 10% -10%, rgba(45,217,138,.07) 0%, transparent 70%),
    radial-gradient(ellipse 50% 35% at 90% 110%, rgba(56,196,245,.06) 0%, transparent 70%);
}

/* ─── App shell ──────────────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 28px 20px 48px;
}

/* ─── Header ─────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.header-left { display: flex; flex-direction: column; gap: 4px; }

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.wordmark-egp { color: var(--nbe); }
.wordmark-uzs { color: var(--tbc); }

.wordmark-arrow {
  width: 22px;
  height: 22px;
  object-fit: contain;
  flex-shrink: 0;
}

.tagline {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ─── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .01em;
  transition: filter .15s, opacity .15s;
}

.btn svg { width: 14px; height: 14px; flex-shrink: 0; }

.btn-ghost {
  background: var(--surface-2);
  color: var(--text-2);
  border: 1px solid var(--border);
}

.btn-ghost:hover { filter: brightness(1.2); color: var(--text); }

.btn-primary {
  background: var(--iris-grad);
  color: #fff;
  border: 0;
  width: 100%;
  justify-content: center;
  height: 42px;
  font-size: 14px;
  border-radius: var(--radius);
}

.btn-primary:hover { filter: brightness(1.08); }

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  background: transparent;
  color: var(--text-3);
  transition: color .15s;
}

.icon-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
.icon-btn:hover { color: var(--text-2); }

/* ─── Rate grid ──────────────────────────────────────────── */
.rate-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1.1fr;
  gap: 2px;
  background: var(--border-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  margin-bottom: 20px;
}

.rate-block {
  position: relative;
  padding: 22px 24px 24px;
  background: var(--surface);
  overflow: hidden;
  transition: background .2s;
}

.rate-block:hover { background: var(--surface-2); }

.rate-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.source-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px 3px 6px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.nbe-badge {
  background: var(--nbe-dim);
  color: var(--nbe);
}

.tbc-badge {
  background: var(--tbc-dim);
  color: var(--tbc);
}

.source-badge img { border-radius: 3px; }

.source-link {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  color: var(--text-3);
  transition: color .15s;
}

.source-link:hover { color: var(--text-2); }
.source-link svg { width: 13px; height: 13px; }

.rate-value {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1;
  color: var(--text);
  margin-bottom: 8px;
}

.rate-desc {
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: .04em;
  text-transform: uppercase;
  font-weight: 500;
}

.mono { font-family: var(--font-mono); font-size: 10px; }

/* ─── Cross rate (signature card) ─────────────────────────── */
.cross-block {
  background: #0a0b10;
}

.cross-block:hover { background: #0c0e14; }

.cross-mesh {
  pointer-events: none;
  position: absolute;
  inset: 0;
  background: var(--iris-grad);
  opacity: .08;
  filter: blur(40px);
  transform: scale(1.3);
  animation: mesh-pulse 8s ease-in-out infinite alternate;
}

@keyframes mesh-pulse {
  from { opacity: .06; transform: scale(1.2) translate(-5%, -5%); }
  to   { opacity: .13; transform: scale(1.4) translate(5%, 5%); }
}

.cross-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  background: var(--iris-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cross-rate-value {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -.02em;
  line-height: 1;
  margin-bottom: 8px;
  background: var(--iris-grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cross-rate-desc {
  font-size: 11px;
  color: var(--text-3);
  letter-spacing: .04em;
  text-transform: uppercase;
  font-weight: 500;
}

/* ─── Warning ────────────────────────────────────────────── */
.warning {
  padding: 12px 16px;
  border-radius: var(--radius);
  border: 1px solid rgba(240,192,96,.15);
  background: rgba(240,192,96,.05);
  color: var(--warn);
  font-size: 12.5px;
  line-height: 1.6;
  margin-bottom: 20px;
}

.warning > div + div { margin-top: 4px; }

/* ─── Tools grid ─────────────────────────────────────────── */
.tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--border-soft);
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
}

.panel {
  padding: 24px;
  background: var(--surface);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.panel-title {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-2);
}

/* ─── Inputs ─────────────────────────────────────────────── */
.input-group { display: flex; flex-direction: column; gap: 6px; }

.input-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.field {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 16px;
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: -.01em;
  outline: none;
  transition: border-color .15s, background .15s;
  -webkit-appearance: none;
}

.field:focus {
  border-color: rgba(25,214,199,.48);
  background: var(--surface-2);
}

.field::placeholder { color: var(--text-3); }

.field-output {
  color: var(--text);
  background: var(--surface-3);
  border-color: var(--border);
}

/* ─── Converter row ──────────────────────────────────────── */
.converter-row {
  display: grid;
  grid-template-columns: 1fr 36px 1fr;
  gap: 10px;
  align-items: end;
}

.swap-btn {
  display: grid;
  place-items: center;
  width: 36px;
  height: 44px;
  border-radius: var(--radius);
  background: transparent;
  border: 0;
  color: var(--text-3);
  transition: color .15s;
  margin-bottom: 0;
}

.swap-btn svg { width: 15px; height: 15px; }
.swap-btn:hover { color: var(--iris-2); }

/* ─── Loss checker ───────────────────────────────────────── */
.loss-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-items: end;
}

.stat-block { display: flex; flex-direction: column; gap: 6px; }

.stat-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--text);
  line-height: 1;
  /* match field height so grid aligns */
  height: 44px;
  display: flex;
  align-items: center;
}

/* ─── Hint + result ──────────────────────────────────────── */
.hint-box {
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--text-2);
  line-height: 1.65;
}

.loss-result {
  margin-top: 14px;
  font-size: 12.5px;
  color: var(--text-2);
  line-height: 1.7;
}

.loss-result strong { color: var(--text); font-weight: 600; }

/* colored spans inside hints */
.nbe-word { color: var(--nbe); font-weight: 600; }
.tbc-word { color: var(--tbc); font-weight: 600; }

/* ─── Modal ──────────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 16px;
}

.modal.hidden { display: none; }

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.65);
  backdrop-filter: blur(6px);
}

.modal-panel {
  position: relative;
  z-index: 1;
  width: min(480px, 100%);
  padding: 24px;
  border-radius: var(--radius-xl);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 32px 80px rgba(0,0,0,.6);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.modal-desc {
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 20px;
  line-height: 1.6;
}

.modal-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

/* ─── Utility ─────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 680px) {
  .app { padding: 16px 12px 36px; }

  .header { margin-bottom: 24px; }
  .wordmark { font-size: 18px; gap: 8px; }
  .wordmark-arrow { width: 22px; }

  .rate-grid {
    grid-template-columns: 1fr 1fr;
    border-radius: var(--radius-lg);
  }

  .cross-block { grid-column: 1 / -1; }

  .rate-value { font-size: 22px; }
  .cross-rate-value { font-size: 22px; }

  .tools-grid {
    grid-template-columns: 1fr;
    border-radius: var(--radius-lg);
  }

  .panel { padding: 18px; }

  .converter-row {
    grid-template-columns: 1fr 32px 1fr;
    gap: 8px;
  }

  .swap-btn { width: 32px; }

  .loss-row { grid-template-columns: 1fr; }
  .stat-value { height: auto; margin-bottom: 4px; }

  .modal-fields { grid-template-columns: 1fr; }
  .modal-panel { padding: 18px; border-radius: var(--radius-lg); }
}

@media (prefers-reduced-motion: reduce) {
  .cross-mesh { animation: none; }
  * { transition: none !important; }
}