:root {
  --navy-950: #0b1220;
  --navy-900: #111827;
  --navy-800: #1e293b;
  --navy-700: #334155;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --white: #ffffff;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;
  --blue-50: #eff6ff;
  --green-700: #15803d;
  --green-50: #f0fdf4;
  --red-600: #dc2626;
  --red-50: #fef2f2;
  --border: #e2e8f0;
  --border-dark: #cbd5e1;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --radius: 8px;
  --radius-lg: 12px;
  --font: "Plus Jakarta Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sidebar: 240px;
}

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

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--navy-800);
  background: var(--slate-50);
  -webkit-font-smoothing: antialiased;
}

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

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--slate-100);
  padding: 0.12em 0.4em;
  border-radius: 4px;
}

.hidden { display: none !important; }

/* Loading */
.loading-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  gap: 16px;
  color: var(--slate-500);
}

.loading-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--navy-900), var(--blue-600));
}

/* Login */
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: linear-gradient(180deg, var(--white) 0%, var(--slate-50) 100%);
}

.login-card {
  width: min(420px, 100%);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  box-shadow: var(--shadow-md);
}

.login-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.login-brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(145deg, var(--navy-900), var(--blue-600));
}

.login-brand h1 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy-950);
}

.login-brand p {
  margin: 2px 0 0;
  font-size: 0.8125rem;
  color: var(--slate-500);
}

.login-card h2 {
  margin: 0 0 8px;
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--navy-950);
}

.login-sub {
  margin: 0 0 24px;
  color: var(--slate-500);
  font-size: 0.9375rem;
}

.form-error {
  margin: 0 0 16px;
  padding: 10px 14px;
  background: var(--red-50);
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: var(--red-600);
  font-size: 0.875rem;
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy-700);
}

.form-field input {
  width: 100%;
  padding: 11px 14px;
  font-family: inherit;
  font-size: 0.9375rem;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  background: var(--white);
}

.form-field input:focus {
  outline: none;
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn.full { width: 100%; }

.btn-primary {
  background: var(--blue-600);
  color: var(--white);
}

.btn-primary:hover:not(:disabled) { background: var(--blue-700); }

.btn-outline {
  background: var(--white);
  color: var(--navy-800);
  border-color: var(--border-dark);
}

.btn-outline:hover:not(:disabled) { background: var(--slate-50); }

.btn-ghost {
  background: transparent;
  color: var(--slate-500);
  border: none;
}

.btn-ghost:hover { color: var(--navy-900); }

.btn-google {
  background: var(--white);
  color: var(--navy-800);
  border-color: var(--border-dark);
}

.btn-google:hover:not(:disabled) { background: var(--slate-50); }

.login-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
  color: var(--slate-400);
  font-size: 0.8125rem;
}

.login-divider::before,
.login-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.login-footer {
  margin-top: 24px;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--slate-500);
}

.login-footer a { color: var(--blue-600); font-weight: 600; }

/* Shell */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar) 1fr;
  min-height: 100vh;
}

.sidebar {
  background: var(--navy-950);
  color: var(--white);
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 20px;
}

.sidebar-brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: linear-gradient(145deg, var(--blue-600), #60a5fa);
}

.sidebar-brand span {
  font-weight: 700;
  font-size: 0.9375rem;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-400);
  transition: background 0.15s, color 0.15s;
}

.nav-item:hover { background: rgba(255,255,255,0.06); color: var(--white); }

.nav-item.active {
  background: rgba(37, 99, 235, 0.2);
  color: var(--white);
}

.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }

.sidebar-user {
  padding: 16px 8px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: auto;
}

.sidebar-user-email {
  font-size: 0.75rem;
  color: var(--slate-400);
  word-break: break-all;
  margin-bottom: 10px;
}

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 28px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.topbar h1 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--navy-950);
}

.topbar-actions { display: flex; gap: 10px; align-items: center; }

.balance-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--blue-50);
  border: 1px solid #bfdbfe;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--blue-700);
}

.balance-pill strong {
  font-family: var(--mono);
  font-weight: 600;
}

.content {
  padding: 28px;
  flex: 1;
}

/* Dashboard */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.stat-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--slate-500);
  margin-bottom: 8px;
}

.stat-value {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy-950);
  letter-spacing: -0.02em;
}

.stat-value.green { color: var(--green-700); }

.stat-note {
  display: block;
  margin-top: 6px;
  font-size: 0.75rem;
  color: var(--slate-400);
}

.panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 20px;
}

.panel h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy-950);
}

.panel p {
  margin: 0 0 16px;
  color: var(--slate-500);
  font-size: 0.9375rem;
}

.code-block {
  margin: 0;
  padding: 16px;
  background: var(--navy-950);
  border-radius: var(--radius);
  overflow-x: auto;
}

.code-block code {
  background: none;
  padding: 0;
  color: #cbd5e1;
  font-size: 0.8125rem;
  line-height: 1.65;
  white-space: pre-wrap;
}

/* Chat playground */
.content--flush {
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 57px);
}

.chat-app {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: calc(100vh - 57px);
  background: var(--slate-50);
}

.chat-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
}

.chat-toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-model-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--slate-500);
}

.chat-model-select {
  padding: 8px 12px;
  font-family: inherit;
  font-size: 0.875rem;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius);
  background: var(--white);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.chat-empty {
  margin: auto;
  text-align: center;
  max-width: 360px;
  color: var(--slate-500);
}

.chat-empty-icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.chat-empty h3 {
  margin: 0 0 8px;
  color: var(--navy-950);
  font-size: 1.125rem;
}

.chat-empty p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.chat-msg {
  display: flex;
  gap: 12px;
  max-width: 820px;
  width: 100%;
}

.chat-msg--user {
  margin-left: auto;
  flex-direction: row-reverse;
}

.chat-msg--assistant {
  margin-right: auto;
}

.chat-avatar {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
}

.chat-msg--user .chat-avatar {
  background: var(--blue-600);
  color: var(--white);
}

.chat-msg--assistant .chat-avatar {
  background: linear-gradient(145deg, var(--navy-900), var(--blue-600));
  color: var(--white);
}

.chat-bubble {
  padding: 12px 16px;
  border-radius: 14px;
  max-width: min(680px, calc(100% - 44px));
}

.chat-msg--user .chat-bubble {
  background: var(--blue-600);
  color: var(--white);
  border-bottom-right-radius: 4px;
}

.chat-msg--assistant .chat-bubble {
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--navy-800);
  border-bottom-left-radius: 4px;
}

.chat-msg--error .chat-bubble {
  background: var(--red-50);
  border-color: #fecaca;
  color: var(--red-600);
}

.chat-bubble-role {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
  opacity: 0.75;
}

.chat-bubble-text {
  font-size: 0.9375rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-typing {
  display: flex;
  gap: 5px;
  padding: 4px 0;
}

.chat-typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--slate-400);
  animation: chat-bounce 1.2s infinite ease-in-out;
}

.chat-typing span:nth-child(2) { animation-delay: 0.15s; }
.chat-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes chat-bounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.45; }
  40% { transform: translateY(-5px); opacity: 1; }
}

.chat-composer-wrap {
  padding: 16px 20px 20px;
  background: linear-gradient(180deg, transparent, var(--slate-50) 24%);
}

.chat-composer {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  max-width: 820px;
  margin: 0 auto;
  padding: 10px 12px 10px 16px;
  background: var(--white);
  border: 1px solid var(--border-dark);
  border-radius: 16px;
  box-shadow: var(--shadow-md);
}

.chat-composer textarea {
  flex: 1;
  border: 0;
  resize: none;
  font-family: inherit;
  font-size: 0.9375rem;
  line-height: 1.5;
  max-height: 160px;
  padding: 6px 0;
  background: transparent;
  color: var(--navy-900);
}

.chat-composer textarea:focus {
  outline: none;
}

.chat-send-btn {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 10px;
  background: var(--blue-600);
  color: var(--white);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s;
}

.chat-send-btn:hover:not(:disabled) {
  background: var(--blue-700);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-meta {
  max-width: 820px;
  margin: 8px auto 0;
  font-size: 0.75rem;
  color: var(--slate-400);
  text-align: center;
}

@media (max-width: 960px) {
  .chat-messages { padding: 16px 12px; }
  .chat-composer-wrap { padding: 12px; }
  .chat-msg { max-width: 100%; }
}

/* Docs */
.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 28px;
  align-items: start;
}

.docs-nav {
  position: sticky;
  top: 24px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.docs-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: var(--slate-500);
}

.docs-nav a:hover,
.docs-nav a.active {
  background: var(--blue-50);
  color: var(--blue-700);
  font-weight: 600;
}

.docs-content {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.docs-content h2 {
  margin: 32px 0 12px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy-950);
}

.docs-content h2:first-child { margin-top: 0; }

.docs-content h3 {
  margin: 24px 0 10px;
  font-size: 1rem;
  font-weight: 600;
}

.docs-content p,
.docs-content li {
  color: var(--slate-500);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.docs-content ul { padding-left: 20px; }

.endpoint {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--slate-50);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.method {
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
}

.method.get { background: #dcfce7; color: var(--green-700); }
.method.post { background: var(--blue-50); color: var(--blue-700); }

.endpoint code { background: none; padding: 0; font-size: 0.8125rem; }

.mobile-nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}

@media (max-width: 960px) {
  .app-shell { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar);
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.2s;
  }

  .sidebar.open { transform: translateX(0); }

  .mobile-nav-toggle { display: block; }

  .stats-grid,
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .docs-nav { position: static; }
}

@media (max-width: 600px) {
  .content { padding: 16px; }
  .login-card { padding: 28px 22px; }
}

.key-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.key-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.key-row:last-child { border-bottom: 0; }

.key-alert {
  background: var(--green-50);
  border: 1px solid #bbf7d0;
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.key-alert code {
  display: block;
  margin-top: 8px;
  word-break: break-all;
}

.login-topup-link {
  margin-top: 12px;
}

.topbar-topup {
  padding: 8px 14px;
  font-size: 0.8125rem;
}

.topup-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, var(--blue-50), var(--white));
  border-color: #bfdbfe;
}

.topup-page {
  min-height: 100vh;
  background:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(37, 99, 235, 0.12), transparent 60%),
    linear-gradient(180deg, var(--white) 0%, var(--slate-50) 100%);
}

.topup-page__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

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

.topup-page__mark {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(145deg, var(--navy-900), var(--blue-600));
  box-shadow: var(--shadow-md);
}

.topup-page__brand-name {
  display: block;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--navy-950);
  letter-spacing: -0.02em;
}

.topup-page__brand-sub {
  display: block;
  font-size: 0.8125rem;
  color: var(--slate-500);
}

.topup-page__back {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--slate-500);
  transition: color 0.15s;
}

.topup-page__back:hover {
  color: var(--blue-600);
}

.topup-page__main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 32px 24px 56px;
}

.topup-page__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 24px;
  align-items: start;
}

.topup-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-md);
}

.topup-panel--main {
  padding: 32px;
}

.topup-panel--side {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topup-panel__eyebrow {
  margin: 0 0 8px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-600);
}

.topup-panel__title {
  margin: 0 0 10px;
  font-size: clamp(1.75rem, 4vw, 2.125rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--navy-950);
  line-height: 1.15;
}

.topup-panel__lead {
  margin: 0 0 28px;
  max-width: 42ch;
  color: var(--slate-500);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.topup-hero {
  text-align: center;
  padding: 28px 20px;
  margin-bottom: 28px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--navy-950) 0%, #1e3a5f 100%);
  color: var(--white);
  transition: box-shadow 0.2s;
}

.topup-hero--invalid {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.35);
}

.topup-hero__label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 8px;
}

.topup-hero__value {
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.topup-hero__min {
  display: block;
  margin-top: 10px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.55);
}

.topup-field {
  margin-bottom: 22px;
}

.topup-field__label {
  display: block;
  margin-bottom: 12px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy-700);
}

.topup-preset-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.topup-preset {
  appearance: none;
  border: 1.5px solid var(--border);
  background: var(--white);
  border-radius: 14px;
  padding: 18px 12px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, transform 0.12s, box-shadow 0.15s;
  font: inherit;
}

.topup-preset:hover {
  border-color: var(--blue-600);
  transform: translateY(-1px);
}

.topup-preset.is-active {
  border-color: var(--blue-600);
  background: var(--blue-50);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.topup-preset__amount {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy-950);
  letter-spacing: -0.02em;
}

.topup-input-wrap {
  display: flex;
  align-items: center;
  max-width: 280px;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  background: var(--white);
  overflow: hidden;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.topup-input-wrap:focus-within {
  border-color: var(--blue-600);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.topup-input-wrap:has(.topup-input.is-invalid) {
  border-color: var(--red-600);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
}

.topup-input-prefix {
  padding: 0 4px 0 16px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--slate-500);
}

.topup-input {
  flex: 1;
  min-width: 0;
  border: 0;
  padding: 14px 16px 14px 8px;
  font: inherit;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--navy-950);
  background: transparent;
}

.topup-input:focus {
  outline: none;
}

.topup-error {
  min-height: 1.25rem;
  margin: 0 0 8px;
  color: var(--red-600);
  font-size: 0.875rem;
  font-weight: 500;
}

.topup-copy-hint {
  margin: 0 0 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--green-50);
  color: var(--green-700);
  font-size: 0.875rem;
  font-weight: 500;
}

.topup-wa-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  margin-top: 4px;
  padding: 16px 20px;
  border: 0;
  border-radius: 14px;
  background: #25d366;
  color: var(--white);
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s, transform 0.12s, opacity 0.15s;
  box-shadow: 0 4px 14px rgba(37, 211, 102, 0.35);
}

.topup-wa-btn:hover:not(:disabled) {
  background: #20bd5a;
  transform: translateY(-1px);
}

.topup-wa-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.topup-wa-btn__icon {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
}

.topup-wa-btn__icon svg {
  width: 22px;
  height: 22px;
}

.topup-page__account,
.topup-page__guest {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.topup-page__account-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--slate-500);
  margin-bottom: 4px;
}

.topup-page__account strong {
  display: block;
  font-size: 0.9375rem;
  color: var(--navy-950);
  word-break: break-all;
}

.topup-page__account-balance {
  display: inline-block;
  margin-top: 8px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--slate-100);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy-700);
}

.topup-page__guest p {
  margin: 0 0 12px;
  font-size: 0.875rem;
  color: var(--slate-500);
}

.topup-side-block__title {
  margin: 0 0 16px;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--navy-950);
}

.topup-side-block--muted {
  padding: 18px;
  border-radius: 14px;
  background: var(--slate-50);
  border: 1px solid var(--border);
}

.topup-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.topup-flow li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.topup-flow__step {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: var(--blue-50);
  color: var(--blue-700);
  font-size: 0.8125rem;
  font-weight: 700;
}

.topup-flow strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.875rem;
  color: var(--navy-950);
}

.topup-flow p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--slate-500);
  line-height: 1.5;
}

.topup-perks {
  list-style: none;
  margin: 0;
  padding: 0;
}

.topup-perks li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-size: 0.875rem;
  color: var(--navy-700);
}

.topup-perks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--blue-600);
}

.topup-support-link {
  margin-top: auto;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px dashed var(--border-dark);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--blue-600);
  text-align: center;
  transition: background 0.15s, border-color 0.15s;
}

.topup-support-link:hover {
  background: var(--blue-50);
  border-color: var(--blue-600);
}

@media (max-width: 900px) {
  .topup-page__grid {
    grid-template-columns: 1fr;
  }

  .topup-panel--main {
    padding: 24px 20px;
  }

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

@media (max-width: 480px) {
  .topup-page__header {
    padding-top: 16px;
  }

  .topup-page__main {
    padding-top: 20px;
    padding-bottom: 40px;
  }

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