:root {
      --primary: #b66dff;
      --primary-deep: #7a5cff;
      --primary-darker: #5a4af4;
      --pink: #ff4d8d;
      --teal: #00d4c0;
      --amber: #ffab00;
      --cyan: #5dc7f9;
      --red: #ff5a5f;
      --green: #00c896;

      --gradient-primary: linear-gradient(135deg, #b66dff 0%, #5a4af4 100%);
      --gradient-pink: linear-gradient(135deg, #ff8fa7 0%, #ff4d8d 100%);
      --gradient-teal: linear-gradient(135deg, #6ee7df 0%, #00d4c0 100%);
      --gradient-amber: linear-gradient(135deg, #ffd166 0%, #ffab00 100%);
      --gradient-soft: linear-gradient(135deg, #f7f4ff 0%, #fef3f9 100%);
      --gradient-hero: radial-gradient(circle at 20% 0%, rgba(182, 109, 255, 0.18), transparent 55%),
                       radial-gradient(circle at 90% 30%, rgba(255, 77, 141, 0.10), transparent 50%),
                       radial-gradient(circle at 50% 100%, rgba(0, 212, 192, 0.08), transparent 55%);

      --bg: #f5f4fa;
      --surface: #ffffff;
      --surface-2: #faf9fd;
      --border: #ebe9f4;
      --border-strong: #d9d5ea;
      --ink: #1d1b35;
      --ink-soft: #4a4870;
      --muted: #8d8ba8;
      --muted-2: #b3b1c8;

      --shadow-sm: 0 2px 8px rgba(94, 73, 178, 0.06);
      --shadow-md: 0 8px 24px rgba(94, 73, 178, 0.08);
      --shadow-lg: 0 20px 48px rgba(94, 73, 178, 0.14);
      --shadow-glow: 0 12px 32px rgba(182, 109, 255, 0.32);
      --radius-sm: 10px;
      --radius: 16px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * , *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
      font-size: 15px; line-height: 1.6;
      color: var(--ink);
      background: var(--bg);
      background-image: var(--gradient-hero);
      background-attachment: fixed;
      -webkit-font-smoothing: antialiased;
      min-height: 100vh;
    }
    a { color: inherit; text-decoration: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; }
    .container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }

    /* ============ NAVBAR (allégée) ============ */
    .navbar {
      position: sticky; top: 0; z-index: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: saturate(180%) blur(16px);
      -webkit-backdrop-filter: saturate(180%) blur(16px);
      border-bottom: 1px solid var(--border);
    }
    .navbar__inner {
      display: flex; align-items: center; justify-content: space-between;
      height: 72px;
    }
    .brand {
      display: flex; align-items: center; gap: 10px;
      font-weight: 800; font-size: 18px;
      letter-spacing: -0.01em;
    }
    .brand__logo {
      width: 36px; height: 36px;
      border-radius: 10px;
      background: var(--gradient-primary);
      display: grid; place-items: center;
      color: #fff;
      box-shadow: var(--shadow-glow);
    }
    .brand__logo .material-icons-outlined { font-size: 20px; }
    .navbar__right {
      display: flex; align-items: center; gap: 16px;
      font-size: 14px; color: var(--ink-soft);
    }
    .navbar__right a { color: var(--primary-deep); font-weight: 600; }
    .navbar__right a:hover { text-decoration: underline; }

    .btn {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 12px 22px;
      border-radius: 10px;
      font-weight: 600; font-size: 14px;
      transition: var(--transition);
      white-space: nowrap;
      border: 1.5px solid transparent;
    }
    .btn--primary {
      background: var(--gradient-primary);
      color: #fff;
      box-shadow: var(--shadow-glow);
    }
    .btn--primary:hover { transform: translateY(-1px); box-shadow: 0 16px 40px rgba(182, 109, 255, 0.4); }
    .btn--primary:disabled {
      background: var(--border-strong);
      color: var(--muted);
      box-shadow: none;
      cursor: not-allowed;
      transform: none;
    }
    .btn--ghost { color: var(--ink-soft); background: var(--surface-2); }
    .btn--ghost:hover { background: var(--border); }
    .btn--outline {
      background: var(--surface);
      color: var(--primary-deep);
      border-color: var(--border-strong);
    }
    .btn--outline:hover { border-color: var(--primary); color: var(--primary); }
    .btn--lg { padding: 14px 28px; font-size: 15px; }
    .btn--full { width: 100%; justify-content: center; }

    /* ============ STEPPER ============ */
    .stepper {
      padding: 40px 0 32px;
      max-width: 720px;
      margin: 0 auto;
    }
    .stepper__bar {
      display: flex; align-items: center; justify-content: space-between;
      gap: 8px;
    }
    .stepper__step {
      display: flex; flex-direction: column; align-items: center;
      flex: 0 0 auto;
      gap: 8px;
      position: relative;
    }
    .stepper__dot {
      width: 40px; height: 40px;
      border-radius: 50%;
      display: grid; place-items: center;
      font-weight: 700; font-size: 14px;
      background: var(--surface);
      border: 2px solid var(--border-strong);
      color: var(--muted);
      transition: var(--transition);
      position: relative; z-index: 2;
    }
    .stepper__dot .material-icons-outlined { font-size: 18px; }
    .stepper__step.active .stepper__dot {
      background: var(--gradient-primary);
      border-color: transparent;
      color: #fff;
      box-shadow: var(--shadow-glow);
      transform: scale(1.05);
    }
    .stepper__step.done .stepper__dot {
      background: var(--green);
      border-color: transparent;
      color: #fff;
    }
    .stepper__label {
      font-size: 12px; font-weight: 600;
      color: var(--muted);
      text-align: center;
    }
    .stepper__step.active .stepper__label,
    .stepper__step.done .stepper__label { color: var(--ink); }
    .stepper__line {
      flex: 1;
      height: 2px;
      background: var(--border);
      position: relative;
      top: -16px; /* aligner avec les dots */
      border-radius: 2px;
      overflow: hidden;
    }
    .stepper__line-fill {
      position: absolute;
      inset: 0;
      background: var(--gradient-primary);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.5s ease;
    }
    .stepper__line.done .stepper__line-fill { transform: scaleX(1); }

    /* ============ LAYOUT ============ */
    .signup-wrap {
      padding: 16px 0 80px;
    }
    .signup-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr;
      gap: 40px;
      align-items: start;
    }
    .step-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-xl);
      padding: 48px;
      box-shadow: var(--shadow-md);
    }
    .step-card__head { margin-bottom: 32px; }
    .step-card__eyebrow {
      display: inline-block;
      padding: 5px 12px;
      background: rgba(182, 109, 255, 0.1);
      color: var(--primary-deep);
      border-radius: 100px;
      font-size: 12px; font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      margin-bottom: 12px;
    }
    .step-card__title {
      font-size: 32px; font-weight: 800;
      letter-spacing: -0.025em;
      margin: 0 0 8px;
      line-height: 1.1;
    }
    .step-card__subtitle {
      font-size: 15px;
      color: var(--ink-soft);
      margin: 0;
    }

    /* steps visibility */
    .step { display: none; animation: fadeIn 0.4s ease; }
    .step.active { display: block; }
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* ============ STEP 1 — PLANS ============ */
    .plan-toggle {
      display: inline-flex;
      padding: 4px;
      background: var(--surface-2);
      border-radius: 100px;
      border: 1px solid var(--border);
      margin-bottom: 28px;
    }
    .plan-toggle button {
      padding: 8px 18px;
      border-radius: 100px;
      font-size: 13px; font-weight: 600;
      color: var(--ink-soft);
      transition: var(--transition);
    }
    .plan-toggle button.active {
      background: var(--surface);
      color: var(--primary-deep);
      box-shadow: var(--shadow-sm);
    }
    .plan-toggle button .badge-save {
      margin-left: 6px;
      padding: 2px 8px;
      background: var(--gradient-teal);
      color: #fff;
      font-size: 10px; font-weight: 700;
      border-radius: 100px;
      vertical-align: middle;
    }

    .plans { display: flex; flex-direction: column; gap: 16px; }
    .plan {
      position: relative;
      display: grid;
      grid-template-columns: auto 1fr auto;
      gap: 20px;
      align-items: center;
      padding: 24px;
      background: var(--surface);
      border: 2px solid var(--border);
      border-radius: var(--radius-lg);
      cursor: pointer;
      transition: var(--transition);
    }
    .plan:hover {
      border-color: rgba(182, 109, 255, 0.4);
      background: var(--surface-2);
    }
    .plan.selected {
      border-color: var(--primary);
      background: linear-gradient(135deg, rgba(182, 109, 255, 0.06) 0%, rgba(255, 77, 141, 0.04) 100%);
      box-shadow: 0 0 0 4px rgba(182, 109, 255, 0.12);
    }
    .plan__badge {
      position: absolute;
      top: -10px; right: 20px;
      background: var(--gradient-primary);
      color: #fff;
      padding: 4px 12px;
      border-radius: 100px;
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      box-shadow: var(--shadow-glow);
    }
    .plan__icon {
      width: 56px; height: 56px;
      border-radius: 16px;
      display: grid; place-items: center;
      color: #fff;
      flex-shrink: 0;
    }
    .plan__icon .material-icons-outlined { font-size: 28px; }
    .plan--famille .plan__icon { background: var(--gradient-pink); }
    .plan--executive .plan__icon { background: var(--gradient-primary); }
    .plan--collab .plan__icon { background: var(--gradient-teal); }
    .plan__name {
      font-size: 18px; font-weight: 700;
      margin: 0 0 4px;
    }
    .plan__seats {
      font-size: 13px; font-weight: 500;
      color: var(--muted);
      margin: 0 0 8px;
    }
    .plan__highlights {
      display: flex; flex-wrap: wrap; gap: 8px;
    }
    .plan__highlights span {
      font-size: 11px;
      padding: 3px 8px;
      background: var(--surface-2);
      border: 1px solid var(--border);
      color: var(--ink-soft);
      border-radius: 6px;
      font-weight: 500;
    }
    .plan__price {
      text-align: right;
    }
    .plan__price .num {
      font-size: 28px; font-weight: 800;
      letter-spacing: -0.02em;
      color: var(--ink);
      line-height: 1;
    }
    .plan__price .unit {
      font-size: 12px;
      color: var(--muted);
      font-weight: 500;
    }
    .plan__check {
      position: absolute;
      top: 24px; right: 24px;
      width: 24px; height: 24px;
      border-radius: 50%;
      border: 2px solid var(--border-strong);
      background: var(--surface);
      display: grid; place-items: center;
      color: transparent;
      transition: var(--transition);
    }
    .plan.selected .plan__check {
      background: var(--gradient-primary);
      border-color: transparent;
      color: #fff;
    }
    .plan.selected .plan__check .material-icons-outlined { font-size: 16px; }

    /* For the more detailed view, on selection show feature list */
    .plan__features {
      display: none;
      grid-column: 1 / -1;
      margin-top: 12px;
      padding-top: 16px;
      border-top: 1px dashed var(--border);
    }
    .plan.selected .plan__features { display: block; }
    .plan__features ul {
      list-style: none; padding: 0; margin: 0;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }
    .plan__features li {
      display: flex; align-items: flex-start; gap: 8px;
      font-size: 13px;
      color: var(--ink-soft);
      line-height: 1.4;
    }
    .plan__features li .material-icons-outlined {
      font-size: 16px; color: var(--teal); flex-shrink: 0; margin-top: 1px;
    }

    /* ============ STEP 2 — ACCOUNT ============ */
    .acc-type-toggle {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 28px;
      padding: 6px;
      background: var(--surface-2);
      border: 1px solid var(--border);
      border-radius: 14px;
    }
    .acc-type-toggle input { display: none; }
    .acc-type-toggle label {
      display: flex; align-items: center; justify-content: center;
      gap: 8px;
      padding: 14px;
      border-radius: 10px;
      font-size: 14px; font-weight: 600;
      color: var(--ink-soft);
      cursor: pointer;
      transition: var(--transition);
    }
    .acc-type-toggle label .material-icons-outlined { font-size: 20px; }
    .acc-type-toggle input:checked + label {
      background: var(--surface);
      color: var(--primary-deep);
      box-shadow: var(--shadow-sm);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .field { display: flex; flex-direction: column; }
    .field--full { grid-column: 1 / -1; }
    .field label {
      font-size: 12px; font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--ink-soft);
      margin-bottom: 8px;
    }
    .field label .req { color: var(--pink); }
    .field input,
    .field select,
    .field textarea {
      padding: 13px 16px;
      border: 1.5px solid var(--border-strong);
      border-radius: 10px;
      font-family: inherit;
      font-size: 14px;
      background: var(--surface);
      color: var(--ink);
      transition: var(--transition);
      outline: none;
      width: 100%;
    }
    .field input:focus,
    .field select:focus,
    .field textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(182, 109, 255, 0.12);
    }
    .field--error input,
    .field--error select {
      border-color: var(--red);
    }
    .field__error {
      font-size: 12px;
      color: var(--red);
      margin-top: 6px;
      display: none;
    }
    .field--error .field__error { display: block; }
    .field__hint {
      font-size: 12px;
      color: var(--muted);
      margin-top: 6px;
    }

    .password-field { position: relative; }
    .password-field input { padding-right: 88px; }
    .password-actions {
      position: absolute;
      right: 6px; top: 50%;
      transform: translateY(-50%);
      display: flex; gap: 4px;
    }
    .password-actions button {
      width: 36px; height: 36px;
      border-radius: 8px;
      color: var(--muted);
      transition: var(--transition);
      display: grid; place-items: center;
    }
    .password-actions button:hover { background: var(--surface-2); color: var(--primary-deep); }
    .password-actions button .material-icons-outlined { font-size: 18px; }

    /* Strength meter */
    .strength {
      margin-top: 12px;
      padding: 14px 16px;
      background: var(--surface-2);
      border: 1px solid var(--border);
      border-radius: 12px;
    }
    .strength__head {
      display: flex; align-items: center; justify-content: space-between;
      margin-bottom: 10px;
    }
    .strength__label {
      font-size: 12px; font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--muted);
    }
    .strength__value {
      font-size: 12px; font-weight: 700;
      padding: 3px 10px;
      border-radius: 100px;
    }
    .strength__bar {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 4px;
      margin-bottom: 12px;
    }
    .strength__bar span {
      height: 5px;
      background: var(--border);
      border-radius: 4px;
      transition: background 0.3s ease;
    }
    .strength__criteria {
      list-style: none;
      padding: 0; margin: 0;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 6px;
    }
    .strength__criteria li {
      display: flex; align-items: center; gap: 6px;
      font-size: 12px;
      color: var(--muted);
    }
    .strength__criteria li .material-icons-outlined {
      font-size: 16px; color: var(--muted-2);
    }
    .strength__criteria li.ok { color: var(--green); }
    .strength__criteria li.ok .material-icons-outlined { color: var(--green); }

    /* Strength colors */
    .strength--0 .strength__value { background: rgba(255, 90, 95, 0.12); color: var(--red); }
    .strength--1 .strength__bar span:nth-child(-n+1) { background: var(--red); }
    .strength--1 .strength__value { background: rgba(255, 90, 95, 0.12); color: var(--red); }
    .strength--2 .strength__bar span:nth-child(-n+2) { background: #ff8c42; }
    .strength--2 .strength__value { background: rgba(255, 140, 66, 0.12); color: #d97706; }
    .strength--3 .strength__bar span:nth-child(-n+3) { background: var(--amber); }
    .strength--3 .strength__value { background: rgba(255, 171, 0, 0.12); color: #b07a00; }
    .strength--4 .strength__bar span:nth-child(-n+4) { background: #62cf6c; }
    .strength--4 .strength__value { background: rgba(98, 207, 108, 0.15); color: #2e7d32; }
    .strength--5 .strength__bar span { background: var(--green); }
    .strength--5 .strength__value { background: rgba(0, 200, 150, 0.15); color: var(--green); }

    /* Passphrase generator */
    .passphrase-tool {
      margin-top: 16px;
      padding: 16px;
      background: linear-gradient(135deg, rgba(182, 109, 255, 0.05) 0%, rgba(0, 212, 192, 0.04) 100%);
      border: 1px dashed rgba(182, 109, 255, 0.3);
      border-radius: 12px;
    }
    .passphrase-tool__head {
      display: flex; align-items: center; justify-content: space-between;
      margin-bottom: 10px;
    }
    .passphrase-tool__title {
      display: flex; align-items: center; gap: 6px;
      font-size: 12px; font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--primary-deep);
    }
    .passphrase-tool__title .material-icons-outlined { font-size: 16px; }
    .passphrase-tool__output {
      display: flex; gap: 8px; align-items: center;
    }
    .passphrase-tool__text {
      flex: 1;
      padding: 10px 14px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 8px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 14px;
      font-weight: 600;
      color: var(--ink);
      user-select: all;
    }
    .passphrase-tool__btn {
      padding: 10px;
      width: 40px; height: 40px;
      border-radius: 8px;
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--primary-deep);
      display: grid; place-items: center;
      transition: var(--transition);
    }
    .passphrase-tool__btn:hover { background: var(--primary); color: #fff; border-color: transparent; }
    .passphrase-tool__btn .material-icons-outlined { font-size: 18px; }
    .passphrase-tool__use {
      margin-top: 10px;
      font-size: 12px;
      color: var(--primary-deep);
      font-weight: 600;
      cursor: pointer;
      display: inline-flex; align-items: center; gap: 4px;
    }
    .passphrase-tool__use:hover { text-decoration: underline; }

    /* Zero-knowledge warning */
    .zk-warning {
      margin-top: 28px;
      padding: 18px 20px;
      background: linear-gradient(135deg, rgba(255, 171, 0, 0.08) 0%, rgba(255, 77, 141, 0.05) 100%);
      border: 1px solid rgba(255, 171, 0, 0.3);
      border-radius: 14px;
      display: flex; gap: 14px;
    }
    .zk-warning__icon {
      flex-shrink: 0;
      width: 40px; height: 40px;
      border-radius: 10px;
      background: var(--gradient-amber);
      color: #fff;
      display: grid; place-items: center;
    }
    .zk-warning__icon .material-icons-outlined { font-size: 22px; }
    .zk-warning__title {
      font-size: 14px; font-weight: 700;
      color: var(--ink);
      margin: 0 0 4px;
    }
    .zk-warning__text {
      font-size: 13px;
      color: var(--ink-soft);
      margin: 0;
      line-height: 1.5;
    }

    /* Checkbox */
    .form-check {
      display: flex; align-items: flex-start; gap: 10px;
      font-size: 13px;
      color: var(--ink-soft);
      margin-top: 16px;
      cursor: pointer;
      user-select: none;
    }
    .form-check input { margin-top: 2px; accent-color: var(--primary); }
    .form-check a { color: var(--primary-deep); font-weight: 600; }
    .form-check a:hover { text-decoration: underline; }

    /* Match indicator */
    .match-indicator {
      display: none;
      margin-top: 8px;
      font-size: 12px;
      align-items: center;
      gap: 4px;
      font-weight: 600;
    }
    .match-indicator.show { display: inline-flex; }
    .match-indicator.match { color: var(--green); }
    .match-indicator.nomatch { color: var(--red); }
    .match-indicator .material-icons-outlined { font-size: 16px; }

    /* ============ STEP 3 — PAYMENT ============ */
    .recap-card {
      background: linear-gradient(135deg, #faf9ff 0%, #fff5fa 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      margin-bottom: 28px;
    }
    .recap-card__head {
      display: flex; align-items: center; justify-content: space-between;
      margin-bottom: 20px;
    }
    .recap-card__title {
      font-size: 13px; font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--muted);
    }
    .recap-card__edit {
      font-size: 12px;
      color: var(--primary-deep);
      font-weight: 600;
      display: inline-flex; align-items: center; gap: 4px;
    }
    .recap-card__edit:hover { text-decoration: underline; }
    .recap-row {
      display: flex; justify-content: space-between;
      padding: 10px 0;
      border-bottom: 1px dashed var(--border);
      font-size: 14px;
    }
    .recap-row:last-of-type { border-bottom: none; }
    .recap-row span:first-child { color: var(--ink-soft); }
    .recap-row span:last-child { font-weight: 600; color: var(--ink); }
    .recap-row--total {
      padding-top: 16px;
      margin-top: 4px;
      border-top: 2px solid var(--border-strong);
      border-bottom: none;
      font-size: 18px;
    }
    .recap-row--total span:last-child {
      font-size: 24px;
      font-weight: 800;
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .pay-methods {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-bottom: 24px;
    }
    .pay-methods input { display: none; }
    .pay-methods label {
      display: flex; align-items: center; justify-content: center;
      gap: 8px;
      padding: 14px;
      background: var(--surface);
      border: 2px solid var(--border);
      border-radius: 12px;
      font-size: 13px; font-weight: 600;
      color: var(--ink-soft);
      cursor: pointer;
      transition: var(--transition);
    }
    .pay-methods label .material-icons-outlined { font-size: 20px; }
    .pay-methods label:hover { border-color: rgba(182, 109, 255, 0.4); }
    .pay-methods input:checked + label {
      background: linear-gradient(135deg, rgba(182, 109, 255, 0.06) 0%, rgba(255, 77, 141, 0.04) 100%);
      border-color: var(--primary);
      color: var(--primary-deep);
    }

    .card-row {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 12px;
    }

    /* ============ SIDEBAR (résumé) ============ */
    .sidebar { position: sticky; top: 96px; }
    .sidebar-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 16px;
    }
    .sidebar-card__head {
      font-size: 12px; font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--muted);
      margin-bottom: 14px;
    }
    .sidebar-plan {
      display: flex; align-items: center; gap: 12px;
      padding: 14px;
      background: var(--gradient-soft);
      border-radius: 12px;
      margin-bottom: 16px;
    }
    .sidebar-plan__icon {
      width: 44px; height: 44px;
      border-radius: 12px;
      background: var(--gradient-primary);
      color: #fff;
      display: grid; place-items: center;
      flex-shrink: 0;
    }
    .sidebar-plan__icon .material-icons-outlined { font-size: 22px; }
    .sidebar-plan__name {
      font-size: 15px; font-weight: 700;
      color: var(--ink);
      margin: 0;
    }
    .sidebar-plan__price {
      font-size: 13px;
      color: var(--muted);
      margin: 0;
    }
    .sidebar-trust {
      display: flex; flex-direction: column; gap: 12px;
    }
    .sidebar-trust__item {
      display: flex; gap: 10px;
      font-size: 13px;
      color: var(--ink-soft);
      align-items: flex-start;
    }
    .sidebar-trust__item .material-icons-outlined {
      color: var(--green);
      font-size: 18px;
      flex-shrink: 0;
      margin-top: 1px;
    }
    .sidebar-trust__item strong { color: var(--ink); font-weight: 600; }

    .testimonial-card {
      background: linear-gradient(135deg, #14122a 0%, #2a1f5a 100%);
      color: #fff;
      border-radius: var(--radius-lg);
      padding: 24px;
      position: relative;
      overflow: hidden;
    }
    .testimonial-card::before {
      content: '';
      position: absolute;
      width: 200px; height: 200px;
      background: var(--gradient-primary);
      filter: blur(60px); opacity: 0.4;
      top: -80px; right: -50px;
      border-radius: 50%;
    }
    .testimonial-card__inner { position: relative; }
    .testimonial-card__quote {
      font-size: 14px;
      line-height: 1.6;
      margin: 0 0 16px;
      opacity: 0.95;
    }
    .testimonial-card__author {
      display: flex; align-items: center; gap: 10px;
    }
    .testimonial-card__avatar {
      width: 36px; height: 36px;
      border-radius: 50%;
      background: var(--gradient-pink);
      display: grid; place-items: center;
      font-weight: 700;
      font-size: 13px;
    }
    .testimonial-card__name { font-size: 13px; font-weight: 700; }
    .testimonial-card__role { font-size: 12px; opacity: 0.7; }

    /* ============ NAV BUTTONS ============ */
    .step-actions {
      display: flex; justify-content: space-between; align-items: center;
      gap: 16px;
      margin-top: 36px;
      padding-top: 24px;
      border-top: 1px solid var(--border);
    }

    /* ============ STEP 4 — SUCCESS ============ */
    .success {
      text-align: center;
      padding: 24px 0;
    }
    .success__icon {
      width: 96px; height: 96px;
      border-radius: 50%;
      background: var(--gradient-teal);
      color: #fff;
      display: grid; place-items: center;
      margin: 0 auto 24px;
      box-shadow: 0 16px 40px rgba(0, 212, 192, 0.4);
      animation: bounceIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .success__icon .material-icons-outlined { font-size: 48px; }
    @keyframes bounceIn {
      0% { transform: scale(0); opacity: 0; }
      50% { transform: scale(1.1); }
      100% { transform: scale(1); opacity: 1; }
    }
    .success__title {
      font-size: 32px; font-weight: 800;
      letter-spacing: -0.025em;
      margin: 0 0 12px;
    }
    .success__sub {
      font-size: 16px;
      color: var(--ink-soft);
      margin: 0 0 32px;
    }
    .success__next {
      max-width: 480px;
      margin: 0 auto;
      text-align: left;
      background: var(--surface-2);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px;
    }
    .success__next h4 {
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--muted);
      margin: 0 0 14px;
      font-weight: 700;
    }
    .success__next ol {
      margin: 0; padding-left: 20px;
      display: flex; flex-direction: column; gap: 8px;
    }
    .success__next li {
      font-size: 14px;
      color: var(--ink);
    }

    /* ============ RESPONSIVE ============ */
    @media (max-width: 1024px) {
      .signup-grid { grid-template-columns: 1fr; }
      .sidebar { position: static; }
      .step-card { padding: 32px 28px; }
    }
    @media (max-width: 640px) {
      .form-grid, .card-row { grid-template-columns: 1fr; }
      .step-card { padding: 24px 20px; }
      .step-card__title { font-size: 24px; }
      .plan { grid-template-columns: auto 1fr; }
      .plan__price { grid-column: 2; text-align: left; padding-top: 4px; }
      .plan__check { top: 16px; right: 16px; }
      .plan__features ul { grid-template-columns: 1fr; }
      .stepper__label { font-size: 10px; }
      .pay-methods { grid-template-columns: 1fr; }
      .strength__criteria { grid-template-columns: 1fr; }
    }