:root {
  --bg: #050403;
  --panel: #13110f;
  --panel-2: #1e1a16;
  --line: #3a332a;
  --text: #f1e0b5;
  --muted: #b8a987;
  --accent: #d79f46;
  --accent-2: #d46a2f;
  --green: #2bd36a;
  --blue: #4ba7ff;
  --cyan: #43d7d0;
  --amber: #ffad3d;
  --shadow: rgba(0, 0, 0, 0.5);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(214, 159, 70, 0.07), transparent 30%),
    linear-gradient(180deg, #0b0907 0%, #050403 100%);
  color: var(--text);
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.page-shell,
.content-page {
  width: min(400px, calc(100% - 24px));
  margin: 0 auto;
  padding: 16px 0 28px;
}

.site-footer,
.admin-shell {
  width: min(400px, calc(100% - 24px));
  margin-left: auto;
  margin-right: auto;
}

.calculator-page {
  display: grid;
  gap: 18px;
  grid-template-columns: 1fr;
}

.calculator-hero {
  display: grid;
  gap: 14px;
  align-items: start;
}

.brand-slot,
.bottom-ad {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 16px 18px;
  border: 2px solid #55493d;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255, 224, 157, 0.9), rgba(205, 157, 74, 0.95)),
    linear-gradient(135deg, rgba(255,255,255,0.18), transparent 60%);
  color: #16120d;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.15), 0 10px 30px var(--shadow);
}

.brand-slot__label,
.bottom-ad__title {
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  font-size: clamp(0.95rem, 2vw, 1.6rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.brand-slot__text,
.bottom-ad__subtitle {
  font-size: 0.55rem;
  font-weight: 700;
}

.app-title {
  text-align: center;
}

.eyebrow {
  margin: 0;
  color: var(--accent);
  font-size: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.app-title h1 {
  margin: 4px 0 0;
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  font-size: clamp(0.95rem, 2.4vw, 1.7rem);
  letter-spacing: 0.06em;
}

.calculator {
  padding: 14px;
  border-radius: 24px;
  border: 2px solid #3b342b;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.08), transparent 35%),
    linear-gradient(180deg, #1b1814, #0f0d0b);
  box-shadow: 0 18px 45px var(--shadow), inset 0 0 0 1px rgba(255,255,255,0.03);
}

.display-grid {
  display: grid;
  gap: 10px;
}

.currency-display {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "name code"
    "value code";
  gap: 6px 14px;
  align-items: center;
  width: 100%;
  min-height: 60px;
  padding: 8px 12px;
  border-radius: 14px;
  border: 2px solid #494236;
  background:
    linear-gradient(180deg, rgba(233, 223, 179, 0.92), rgba(194, 189, 154, 0.92));
  color: #181612;
  box-shadow: inset 0 0 0 2px rgba(0,0,0,0.18);
  text-align: left;
  cursor: pointer;
}

.currency-display.is-base {
  outline: 3px solid rgba(215, 159, 70, 0.8);
  transform: translateY(-1px);
}

.currency-display__name {
  grid-area: name;
  font-size: 0.5rem;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.currency-display__value {
  grid-area: value;
  font-family: inherit;
  font-size: clamp(1.25rem, 4.5vw, 2rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.18);
}

.currency-display__code {
  grid-area: code;
  align-self: center;
  font-size: 0.6rem;
  font-weight: 900;
}

.rate-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 2px 12px;
  color: var(--accent);
}

.rate-line__text {
  margin: 0;
  font-size: 0.95rem;
}

.refresh-button {
  width: 48px;
  height: 48px;
  border: 2px solid #50483d;
  border-radius: 12px;
  background: linear-gradient(180deg, #23201b, #120f0d);
  color: var(--text);
  cursor: pointer;
}

.keypad {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.key {
  min-height: 66px;
  border: 2px solid #494338;
  border-radius: 14px;
  background:
    linear-gradient(180deg, #2a251f, #15120f);
  color: var(--text);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 900;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), 0 8px 16px rgba(0,0,0,0.28);
  cursor: pointer;
}

.key--action,
.key--equals,
.key--backspace {
  background: linear-gradient(180deg, #c58c3e, #8e5c17);
  color: #1c1206;
}

.key--equals {
  grid-row: span 2;
  min-height: 142px;
  background: linear-gradient(180deg, #d46a2f, #8b3110);
}

.key--zero {
  grid-column: span 2;
}

.key--decimal {
  letter-spacing: 0.05em;
}

.bottom-ad {
  min-height: 80px;
  margin-top: 10px;
  padding: 10px 12px;
  justify-content: center;
  text-align: center;
  flex-shrink: 0;
  z-index: 1;
}

.info-panel {
  display: grid;
  gap: 14px;
}

.info-card,
.language-card,
.cta-panel,
.seo-copy {
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(24, 21, 18, 0.97), rgba(12, 11, 9, 0.97));
  border: 1px solid var(--line);
  box-shadow: 0 12px 28px rgba(0,0,0,0.25);
}

.info-card h2,
.content-hero h1,
.language-card h2,
.seo-copy h2 {
  margin: 0 0 10px;
  font-family: Impact, Haettenschweiler, "Arial Black", sans-serif;
  letter-spacing: 0.05em;
}

.info-card ul,
.language-card ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.info-card--blue h2 { color: var(--blue); }
.info-card--green h2 { color: var(--green); }
.info-card--amber h2 { color: var(--amber); }
.info-card--cyan h2 { color: var(--cyan); }

.seo-copy {
  margin-top: 14px;
}

.site-footer {
  margin: 0 auto 18px;
  color: #8f8267;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 12px;
  text-align: center;
}

.content-hero,
.dual-language,
.cta-panel {
  margin-bottom: 16px;
}

.dual-language {
  display: grid;
  gap: 14px;
}

.whatsapp-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border-radius: 12px;
  background: linear-gradient(180deg, #37d17a, #15904a);
  color: #041006;
  font-weight: 900;
}

.developer-signature {
  color: #9b8d73;
}

.admin-shell {
  padding: 16px 0 28px;
}

.admin-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.admin-card,
.admin-table,
.admin-form {
  padding: 18px;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(24, 21, 18, 0.97), rgba(12, 11, 9, 0.97));
  border: 1px solid var(--line);
  margin-bottom: 14px;
}

.stats-grid {
  display: grid;
  gap: 12px;
}

.stat {
  padding: 14px;
  border-radius: 14px;
  background: rgba(255,255,255,0.03);
}

.stat__label {
  color: var(--muted);
  font-size: 0.9rem;
}

.stat__value {
  display: block;
  font-size: 1.8rem;
  font-weight: 900;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 10px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  text-align: left;
}

label {
  display: block;
  margin-bottom: 6px;
}

input, select, textarea {
  width: 100%;
  padding: 12px 12px;
  border-radius: 10px;
  border: 1px solid #4a4337;
  background: #090806;
  color: var(--text);
}

.form-grid {
  display: grid;
  gap: 12px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.button-row form {
  margin: 0;
}

.button,
.button-secondary {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 10px;
  border: none;
  font-weight: 900;
  cursor: pointer;
}

.button {
  background: linear-gradient(180deg, #d79f46, #a66b1e);
  color: #130c04;
}

.button-secondary {
  background: linear-gradient(180deg, #2f2c28, #191714);
  color: var(--text);
  border: 1px solid #484236;
}

@media (min-width: 860px) {
  .calculator-hero {
    position: relative;
  }

  .dual-language {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stats-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 430px) {
  .currency-display__value {
    font-size: clamp(1.3rem, 5.4vw, 2.15rem);
  }
}