:root {
  --bg: #F8FBFF;
  --surface: #FFFFFF;
  --surface-strong: #F1F7FF;
  --border: rgba(15, 23, 42, 0.08);
  --text: #0F172A;
  --text-muted: #64748B;
  --blue: #1D4ED8;
  --blue-strong: #2563EB;
  --green: #10B981;
  --gray: #CBD5E1;
  --radius: 24px;
  --shadow: 0 24px 80px rgba(15, 23, 42, 0.08);
}
* { box-sizing: border-box; }
html,body { margin: 0; min-height: 100%; font-family: 'DM Sans', sans-serif; background: linear-gradient(180deg, #EBF2FF 0%, #F8FBFF 100%); color: var(--text); }
body { display: grid; place-items: center; padding: 32px; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; }
button { border: none; cursor: pointer; }

.page-shell { width: min(100%, 1040px); }
.auth-card { background: var(--surface); border: 1px solid rgba(15,23,42,0.05); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.auth-top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 28px 32px; }
.auth-logo { font-family: 'Sora', sans-serif; font-size: 1.45rem; font-weight: 800; letter-spacing: -0.03em; color: var(--blue); display: inline-flex; align-items: center; gap: 10px; }
.auth-logo-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(16,185,129,0.16); }
.auth-badge { display: inline-flex; align-items: center; gap: 10px; padding: 10px 16px; border-radius: 999px; background: rgba(59, 130, 246, 0.08); color: var(--blue); font-weight: 600; }
.auth-body { display: grid; gap: 24px; padding: 0 32px 32px; }
.auth-step { display: none; }
.auth-step.active { display: block; }
.auth-title { margin: 0 0 6px; font-size: clamp(1.75rem, 2.4vw, 2.4rem); line-height: 1.05; }
.auth-copy { margin: 0 0 28px; color: var(--text-muted); max-width: 720px; }

.form-grid { display: grid; gap: 18px; }
.form-row { display: grid; gap: 10px; }
.form-row label { font-size: 0.95rem; font-weight: 600; color: var(--text); }
.form-row input, .form-row select { width: 100%; padding: 14px 16px; border: 1px solid var(--border); border-radius: 16px; background: #F8FAFF; color: var(--text); }
.form-row input:focus, .form-row select:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px rgba(59,130,246,0.12); }
.radio-group { display: grid; gap: 12px; }
.radio-option { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border: 1px solid var(--border); border-radius: 16px; background: #F8FAFF; cursor: pointer; }
.radio-option input { accent-color: var(--blue); }
.checkbox-row { display: flex; align-items: flex-start; gap: 12px; }
.checkbox-row input { margin-top: 4px; accent-color: var(--blue); }
.checkbox-row label { color: var(--text-muted); line-height: 1.5; }

.btn-group { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.btn-primary { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 14px 22px; border-radius: 14px; background: var(--blue); color: white; font-weight: 700; transition: transform 0.2s ease, background 0.2s ease; }
.btn-primary:hover { transform: translateY(-1px); background: var(--blue-strong); }
.btn-secondary { display: inline-flex; align-items: center; justify-content: center; padding: 14px 22px; border-radius: 14px; background: transparent; border: 1px solid rgba(15,23,42,0.12); color: var(--text); }
.link-button { background: transparent; border: none; color: var(--blue); font: inherit; font-weight: 700; cursor: pointer; padding: 0; text-decoration: underline; }
.secondary-link { color: var(--blue); font-weight: 600; }
.button-loading { opacity: 0.7; cursor: not-allowed; }

.step-tracker { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; padding: 0 0 8px; }
.step-chip { padding: 12px 14px; border-radius: 14px; border: 1px solid rgba(15,23,42,0.08); background: #F8FAFF; color: var(--text); font-size: 0.92rem; font-weight: 600; text-align: center; }
.step-chip.active { border-color: var(--blue); background: rgba(59,130,246,0.08); color: var(--blue); }

.plan-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 16px; }
.plan-card { border: 1px solid rgba(15,23,42,0.08); border-radius: 20px; padding: 20px; background: #F8FAFF; display: grid; gap: 14px; }
.plan-card.selected { border-color: var(--blue); background: rgba(59,130,246,0.08); }
.plan-label { font-size: 0.95rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--blue); display: inline-flex; align-items: center; gap: 8px; }
.plan-card[data-plan="business"] .plan-label::after { content: 'Most popular'; display: inline-flex; padding: 4px 8px; border-radius: 999px; background: rgba(16,185,129,0.12); color: var(--green); font-size: 0.75rem; font-weight: 700; }
.plan-name { font-size: 1.4rem; font-weight: 800; margin: 0; }
.plan-price { font-size: 2rem; font-weight: 800; margin: 0; }
.plan-period { color: var(--text-muted); }
.plan-features { margin: 0; padding-left: 18px; color: var(--text-muted); display: grid; gap: 8px; }

.panel { margin-top: 24px; padding: 22px; border-radius: 20px; background: #F1F7FF; border: 1px solid rgba(59,130,246,0.08); }
.panel strong { display: block; margin-bottom: 8px; }
.alert { margin: 0; padding: 14px 16px; border-radius: 16px; background: rgba(248,113,113,0.12); color: #B91C1C; font-size: 0.95rem; }
.caption { color: var(--text-muted); font-size: 0.95rem; }
.hidden { display: none !important; }

.code-inputs { display: grid; grid-template-columns: repeat(6, minmax(40px, 1fr)); gap: 10px; }
.code-inputs input { text-align: center; font-size: 1.3rem; letter-spacing: 0.15em; padding: 16px 0; }
.password-requirements { padding: 0 0 8px; }
.requirements-list { margin: 0; padding-left: 18px; display: grid; gap: 6px; color: var(--text-muted); }
.requirements-list li { list-style: none; position: relative; padding-left: 22px; }
.requirements-list li::before { content: '\25CB'; position: absolute; left: 0; color: var(--gray); }
.requirements-list li.valid::before { content: '\2714'; color: var(--green); }
.requirements-list li.valid { color: var(--text); }

.toast-container { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); display: grid; gap: 10px; width: min(480px, calc(100% - 32px)); z-index: 9999; pointer-events: none; }
.toast { padding: 14px 18px; border-radius: 16px; box-shadow: 0 24px 60px rgba(15,23,42,0.12); color: white; font-size: 0.95rem; pointer-events: auto; }
.toast-success { background: #10B981; }
.toast-error { background: #EF4444; }
.toast-info { background: #2563EB; }
.toast .toast-close { margin-left: 12px; background: transparent; border: none; color: inherit; font-size: 1rem; cursor: pointer; }

@media (max-width: 700px) {
  body { padding: 20px; }
  .auth-top { flex-direction: column; align-items: flex-start; }
  .auth-body { padding: 0 24px 24px; }
  .plan-grid { grid-template-columns: 1fr; }
}