:root {
  --bg: #f6f7fb;
  --bg-elevated: #ffffff;
  --fg: #111827;
  --fg-muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #3b82f6;
  --border-subtle: #e5e7eb;
  --input-bg: #f9fafb;
  --shadow-soft: 0 20px 40px rgba(15, 23, 42, 0.08);
  --error: #b91c1c;
}

[data-theme="dark"] {
  --bg: #020617;
  --bg-elevated: #0f172a;
  --fg: #e5e7eb;
  --fg-muted: #9ca3af;
  --accent: #60a5fa;
  --accent-soft: #1d4ed8;
  --border-subtle: #1f2937;
  --input-bg: #1e293b;
  --shadow-soft: 0 20px 40px rgba(0,0,0,0.6);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;

  /* Emoji-safe fallback */
font-family:
  "Inter",
  system-ui,
  -apple-system,
  BlinkMacSystemFont,
  "Segoe UI",
  Roboto,
  Helvetica,
  Arial,
  "Apple Color Emoji",
  "Segoe UI Emoji",
  "Noto Color Emoji",
  sans-serif;


  background: var(--bg);
  color: var(--fg);
  padding: 16px;
}

/* ---------------------- */
/* Shell / Layout         */
/* ---------------------- */

.shell {
  max-width: 960px;
  margin: 0 auto;
  background: var(--bg-elevated);
  border-radius: 24px;
  padding: 28px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ---------------------- */
/* Header                 */
/* ---------------------- */

header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-circle {
  flex: 0 0 44px; /* Never shrink, never stretch – always a circle */
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(
    115deg,
    #2563eb 0%,
    #2563eb 45%,
    #fde047 55%,
    #fde047 100%
  );
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 20px;
}

/* Text wrapper to allow proper wrapping */
.brand-text {
  min-width: 0;
}

.brand-text-title {
  font-size: 20px;
  font-weight: 700;
  white-space: normal;
}

.brand-text-sub {
  font-size: 14px;
  color: var(--fg-muted);
  white-space: normal;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-left: auto;
}

/* ---------------------- */
/* Buttons                */
/* ---------------------- */

.btn {
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  color: var(--fg);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

.btn-lang.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: #ffffff; /* Fixed text color */
}

.btn-lang:not(.active) {
  background: var(--bg-elevated);
  color: var(--fg);
}

/* Dark mode fixes */
[data-theme="dark"] .btn-lang.active {
  background: var(--accent);
  color: #ffffff;
}

[data-theme="dark"] .btn-lang:not(.active) {
  background: var(--bg-elevated);
  color: var(--fg);
}

/* Theme button */
.btn-theme {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ---------------------- */
/* Cards                  */
/* ---------------------- */

.card {
  border-radius: 20px;
  padding: 22px 20px 26px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
}

.card-title {
  margin: 0 0 6px;
  font-size: 22px;
  font-weight: 700;
}

.card-subtitle {
  margin: 0 0 18px;
  font-size: 15px;
  color: var(--fg-muted);
}

/* ---------------------- */
/* Split Header (EUR BGN) */
/* ---------------------- */

.split-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 22px;
}

.head-pill {
  background: var(--accent-soft);
  color: #ffffff;
  text-align: center;
  padding: 12px 0;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 600;
  line-height: 1;
}

@media (max-width: 640px) {
  .split-head {
    grid-template-columns: 1fr;
  }
}

/* ---------------------- */
/* Operation Blocks       */
/* ---------------------- */

.operation-block {
  margin-bottom: 28px;
}

.op-label {
  margin-bottom: 10px;
}

.op-main {
  font-size: 17px;
  font-weight: 600;
}

.op-sub {
  font-size: 14px;
  color: var(--fg-muted);
  margin-left: 6px;
}

/* ---------------------- */
/* Input Grids            */
/* ---------------------- */

.op-inputs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 640px) {
  .op-inputs {
    grid-template-columns: 1fr;
  }
}

/* ---------------------- */
/* Input Fields           */
/* ---------------------- */

.field {
  position: relative;
}

.prefix {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  color: var(--fg-muted);
  font-weight: 600;
}

.field input {
  width: 100%;
  padding: 12px 14px 12px 56px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--input-bg);
  color: var(--fg);
  font-size: 16px;
}

.field input:focus {
  outline: none;
  border-color: var(--accent);
}

/* Hide number arrows */
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;
}

/* ---------------------- */
/* Negative Resto         */
/* ---------------------- */

.negative input {
  border-color: var(--error) !important;
  color: var(--error) !important;
}

.change-warning {
  margin-top: 8px;
  color: var(--error);
  font-size: 14px;
  font-weight: 500;
}

/* ---------------------- */
/* Error Text             */
/* ---------------------- */

.error-text {
  margin-top: 6px;
  font-size: 14px;
  color: var(--error);
  display: none;
}

/* ---------------------- */
/* Rules Section          */
/* ---------------------- */

.info-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.info-body {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.5;
}

.hint {
  margin-top: 14px;
  font-size: 13px;
  color: var(--fg-muted);
}

.hint ul {
  padding-left: 20px;
  margin: 6px 0 0;
}

/* ---------------------- */
/* Footer                 */
/* ---------------------- */

footer {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--fg-muted);
  gap: 4px 12px;
}

.footer-note {
  text-align: center;
  justify-content: center;
}