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

:root {
  --bg: #0b1120;
  --surface: #131a2a;
  --surface-light: #1b2338;
  --surface-lighter: #243056;
  --border: #2d3a54;
  --text: #e1e7ef;
  --text-sec: #8b95a8;
  --text-dim: #5a6478;
  --accent: #6c5ce7;
  --accent-hover: #7c6ef7;
  --red: #ff6b6b;
  --red-bg: rgba(255, 107, 107, 0.1);
  --red-border: rgba(255, 107, 107, 0.2);
  --green: #51cf66;
  --green-bg: rgba(81, 207, 102, 0.1);
  --green-border: rgba(81, 207, 102, 0.2);
  --radius: 16px;
  --radius-sm: 12px;
  --font: "Inter", system-ui, -apple-system, sans-serif;
}

body {
  background: var(--bg);
  background-image: radial-gradient(ellipse at top, #1a1f3d 0%, transparent 50%);
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ── Form Layout ─────────────────────────────────── */
#swap-form {
  width: 100%;
  max-width: 460px;
}

.form-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
}

/* ── Panel ────────────────────────────────────────── */
.panel {
  background: var(--surface-light);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 4px;
}

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

.label {
  font-size: 13px;
  color: var(--text-sec);
}

.balance-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.balance {
  font-size: 12px;
  color: var(--text-sec);
}

.max-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background 0.15s;
}

.max-btn:hover {
  background: var(--accent-hover);
}

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

.panel-footer {
  margin-top: 6px;
  min-height: 18px;
}

.usd {
  font-size: 12px;
  color: var(--text-sec);
}

/* ── Amount Input ─────────────────────────────────── */
#from-amount {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 28px;
  font-weight: 500;
  color: var(--text);
  font-family: var(--font);
  min-width: 0;
}

#from-amount::placeholder {
  color: var(--text-dim);
}

/* ── Receive Display ──────────────────────────────── */
.receive-area {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.receive-value {
  font-size: 28px;
  font-weight: 500;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Token Button ─────────────────────────────────── */
.token-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--surface-lighter);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font);
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: background 0.15s;
}

.token-btn:hover {
  background: #2d3d66;
}

.token-placeholder {
  color: var(--text-sec);
}

.token-btn .icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  flex-shrink: 0;
}

.token-btn .icon-fallback {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--surface-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 700;
  color: var(--text-sec);
  flex-shrink: 0;
}

.chevron {
  width: 16px;
  height: 16px;
  color: var(--text-sec);
  flex-shrink: 0;
}

/* ── Swap Direction ───────────────────────────────── */
.swap-row {
  display: flex;
  justify-content: center;
  margin: -8px 0;
  position: relative;
  z-index: 2;
}

.swap-dir-btn {
  width: 36px;
  height: 36px;
  background: var(--surface-light);
  border: 4px solid var(--bg);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
}

.swap-dir-btn svg {
  width: 16px;
  height: 16px;
  color: var(--text-sec);
  transition: color 0.15s;
}

.swap-dir-btn:hover {
  background: var(--surface-lighter);
}

.swap-dir-btn:hover svg {
  color: var(--text);
}

/* ── Rate ─────────────────────────────────────────── */
.rate {
  font-size: 12px;
  color: var(--text-sec);
  padding: 8px 4px 0;
  min-height: 24px;
}

/* ── Message ──────────────────────────────────────── */
.msg {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-top: 12px;
}

.msg-error {
  background: var(--red-bg);
  border: 1px solid var(--red-border);
  color: var(--red);
}

.msg-success {
  background: var(--green-bg);
  border: 1px solid var(--green-border);
  color: var(--green);
}

/* ── Submit Button ────────────────────────────────── */
.submit-btn {
  width: 100%;
  padding: 16px;
  margin-top: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.submit-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}

.submit-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ── Spinners ─────────────────────────────────────── */
.spinner-sm {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

.btn-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ── Skeleton ─────────────────────────────────────── */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-lighter) 25%,
    var(--border) 50%,
    var(--surface-lighter) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
  color: transparent !important;
  display: inline-block;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ── Modal ────────────────────────────────────────── */
.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 100;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.2s, visibility 0.2s;
}

.modal.open {
  visibility: visible;
  opacity: 1;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 420px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
}

.modal-head h2 {
  font-size: 16px;
  font-weight: 600;
}

.modal-x {
  background: none;
  border: none;
  color: var(--text-sec);
  font-size: 24px;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
  transition: color 0.15s;
}

.modal-x:hover {
  color: var(--text);
}

.modal-search {
  padding: 0 16px 12px;
}

.modal-search input {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.15s;
}

.modal-search input::placeholder {
  color: var(--text-dim);
}

.modal-search input:focus {
  border-color: var(--accent);
}

.modal-list {
  overflow-y: auto;
  flex: 1;
  padding-bottom: 8px;
}

.modal-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  color: var(--text);
  transition: background 0.1s;
}

.modal-item:hover {
  background: var(--surface-light);
}

.modal-item .icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  flex-shrink: 0;
}

.modal-item .icon-fallback {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface-lighter);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-sec);
  flex-shrink: 0;
}

.modal-item-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.modal-item-name {
  font-size: 14px;
  font-weight: 500;
}

.modal-item-price {
  font-size: 12px;
  color: var(--text-sec);
}

.modal-empty {
  padding: 24px;
  text-align: center;
  color: var(--text-sec);
  font-size: 14px;
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 480px) {
  #from-amount,
  .receive-value {
    font-size: 22px;
  }

  .panel {
    padding: 14px;
  }
}