:root {
  color-scheme: light;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  /* Backgrounds */
  --bg-primary: #f8f9fb;
  --bg-secondary: #eff1f5;
  --surface: #ffffff;
  --surface-alt: #f8f9fb;
  /* Text */
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-tertiary: #64748b;
  --text-disabled: #94a3b8;
  /* Accent - Banking blue */
  --accent-primary: #1e40af;
  --accent-hover: #1e3a8a;
  --accent-light: #3b82f6;
  --accent-subtle: rgba(30, 64, 175, 0.08);
  /* Status */
  --status-success: #059669;
  --status-warning: #d97706;
  --status-error: #dc2626;
  --status-pending: #6366f1;
  /* Borders */
  --border-light: #e1e4eb;
  --border-medium: #cbd0dc;
  --border-dark: #9ca3af;
  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 12px 24px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 4vw, 3.5rem);
  background: var(--bg-primary);
  color: var(--text-primary);
}

main.shell {
  width: min(720px, 96vw);
  display: grid;
  gap: clamp(1.6rem, 3vw, 2.4rem);
  background: var(--surface);
  border-radius: 8px;
  border: 2px solid var(--border-light);
  box-shadow: var(--shadow-lg);
  padding: clamp(2rem, 4vw, 2.8rem);
}

.hero {
  display: grid;
  gap: 0.65rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: 0.015em;
}

.hero p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-secondary);
}

.progress-card {
  border-radius: 8px;
  border: 2px solid var(--border-light);
  background: var(--bg-secondary);
  padding: 1.15rem 1.35rem;
  display: grid;
  gap: 0.35rem;
}

.step-title {
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.step-subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.panel {
  border-radius: 8px;
  border: 2px solid var(--border-light);
  background: var(--surface);
  padding: clamp(1.6rem, 3vw, 2.4rem);
  display: grid;
  gap: 1.4rem;
}

.panel h2 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.015em;
}

.panel.completed {
  opacity: 0.55;
}

form {
  display: grid;
  gap: 1.1rem;
}

label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

input {
  width: 100%;
  padding: 0.9rem 1rem;
  border-radius: 6px;
  border: 2px solid var(--border-medium);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 1rem;
  transition: border 0.2s ease, box-shadow 0.2s ease;
}

input::placeholder {
  color: var(--text-disabled);
}

input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

button.primary {
  border: none;
  border-radius: 6px;
  padding: 0.95rem 1.15rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  background: var(--accent-primary);
  color: #ffffff;
  box-shadow: var(--shadow-md);
  transition: background 0.15s ease, box-shadow 0.15s ease;
}

button.primary:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  box-shadow: none;
}

button.primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: var(--shadow-lg);
}

.link-button {
  border: none;
  background: transparent;
  color: var(--accent-primary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  padding: 0;
  text-align: left;
}

.link-button:hover {
  text-decoration: underline;
}

.error {
  min-height: 1.2rem;
  font-size: 0.92rem;
  color: var(--status-error);
}

.captcha-row {
  display: grid;
  gap: 0.7rem;
}

.captcha-visual {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.7rem;
}

.captcha-image {
  width: 160px;
  height: 50px;
  border-radius: 6px;
  border: 2px solid var(--border-light);
  background: #ffffff;
}

.captcha-refresh {
  padding: 0;
}

.status {
  font-size: 0.85rem;
  color: var(--accent-primary);
  min-height: 1.1rem;
}

.status.error {
  color: var(--status-error);
}

.otp-meta {
  display: grid;
  gap: 0.8rem;
}

.otp-message {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.otp-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.timer {
  font-size: 0.9rem;
  color: var(--text-tertiary);
}

.debug-code {
  font-weight: 600;
  color: var(--accent-primary);
}

.meta {
  margin-top: 0.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-disabled);
}

@media (max-width: 620px) {
  body {
    align-items: flex-start;
  }

  main.shell {
    border-radius: 8px;
    padding: clamp(1.6rem, 5vw, 2.2rem);
  }
}