* { margin: 0; padding: 0; box-sizing: border-box; }

  /* ===== MOBILE-FIRST BASE (all phones) ===== */
  body {
    background: #111111;
    color: #e0e0e0;
    font-family: 'Inter', -apple-system, sans-serif;
    font-weight: 500;
    font-size: 17px;
    line-height: 1.8;
    -webkit-text-size-adjust: 100%;
  }

  /* Hero */
  .hero {
    text-align: center;
    padding: 56px 20px 48px;
    background: linear-gradient(180deg, #1a1708 0%, #111111 100%);
  }
  .hero-logo {
    font-family: 'Unbounded', sans-serif;
    font-weight: 900;
    font-size: 44px;
    color: #F5A623;
    letter-spacing: 3px;
  }
  .hero-kanji {
    font-size: 36px;
    color: #F5A623;
    margin-left: 8px;
  }
  .hero-tagline {
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 22px;
    color: #fff;
    margin-top: 20px;
  }
  .hero-sub {
    font-size: 17px;
    color: #999;
    margin-top: 16px;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
  }
  .hero-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 18px;
    color: #111;
    background: #F5A623;
    padding: 16px 40px;
    border-radius: 12px;
    text-decoration: none;
    margin-top: 28px;
    min-height: 56px;
  }
  .hero-cta:hover { background: #e6951e; }
  .hero-cta:active { background: #d4880f; transform: scale(0.98); }

  /* Content */
  .content { max-width: 720px; margin: 0 auto; padding: 0 20px 64px; }

  /* Section */
  .section { margin-top: 56px; }
  .section-label {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 15px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #F5A623;
    margin-bottom: 16px;
  }
  .section h2 {
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 24px;
    color: #fff;
    margin-bottom: 16px;
  }
  .section p {
    color: #ccc;
    margin-bottom: 14px;
    line-height: 1.8;
    font-size: 17px;
  }

  /* Steps */
  .steps { display: flex; flex-direction: column; gap: 0; margin-top: 24px; }
  .step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px 0;
    border-bottom: 1px solid #1a1a1a;
  }
  .step:last-child { border-bottom: none; }
  .step-number {
    font-family: 'Unbounded', sans-serif;
    font-weight: 800;
    font-size: 36px;
    color: #F5A623;
    line-height: 1;
    min-width: 44px;
  }
  .step-content h3 {
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 19px;
    color: #fff;
    margin-bottom: 6px;
  }
  .step-content p {
    font-size: 16px;
    color: #aaa;
    margin: 0;
    line-height: 1.7;
  }

  /* What to expect list */
  .expect-list { list-style: none; margin-top: 16px; }
  .expect-list li {
    padding: 14px 0;
    border-bottom: 1px solid #1a1a1a;
    color: #ccc;
    font-size: 17px;
    padding-left: 22px;
    position: relative;
    line-height: 1.6;
  }
  .expect-list li:last-child { border-bottom: none; }
  .expect-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 22px;
    width: 7px;
    height: 7px;
    background: #F5A623;
    border-radius: 50%;
  }

  /* CTA / Signup */
  .cta {
    margin-top: 56px;
    background: linear-gradient(135deg, #1a1708, #151515);
    border: 1px solid #333;
    border-radius: 16px;
    padding: 40px 24px;
    text-align: center;
  }
  .cta h2 {
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 22px;
    color: #fff;
    margin-bottom: 12px;
  }
  .cta > p { color: #aaa; font-size: 16px; margin-bottom: 24px; line-height: 1.7; }

  /* Signup form */
  .signup-form { margin-top: 24px; text-align: left; }
  .form-row { margin-bottom: 16px; }
  .form-row-half { display: flex; gap: 12px; margin-bottom: 16px; }
  .form-row-half > div { flex: 1; }
  .form-label {
    display: block;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 14px;
    color: #ccc;
    margin-bottom: 8px;
  }
  .form-input, .form-select {
    width: 100%;
    padding: 16px;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 17px;
    color: #fff;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 10px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
  }
  .form-input::placeholder { color: #555; }
  .form-input:focus, .form-select:focus {
    border-color: #F5A623;
    box-shadow: 0 0 0 2px rgba(245, 166, 35, 0.15);
  }
  .form-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%23888' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 44px;
  }
  .form-select option { background: #1a1a1a; color: #fff; }

  /* Agreement section */
  .agreement-section {
    margin-top: 24px;
    text-align: left;
  }
  .agreement-toggle {
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    padding: 16px 0;
    user-select: none;
    -webkit-user-select: none;
  }
  .agreement-checkbox {
    width: 28px;
    height: 28px;
    min-width: 28px;
    border: 2px solid #444;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    background: #1a1a1a;
  }
  .agreement-checkbox.checked {
    background: #22c55e;
    border-color: #22c55e;
  }
  .agreement-checkbox svg {
    width: 16px;
    height: 16px;
    opacity: 0;
    transition: opacity 0.15s;
  }
  .agreement-checkbox.checked svg { opacity: 1; }
  .agreement-toggle-text {
    font-size: 16px;
    color: #ccc;
    line-height: 1.5;
  }
  .agreement-toggle-text a {
    color: #F5A623;
    text-decoration: underline;
    text-underline-offset: 2px;
  }

  /* Expandable agreement */
  .agreement-expand {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .agreement-expand.open {
    max-height: 2000px;
  }
  .agreement-body {
    background: #161616;
    border: 1px solid #222;
    border-radius: 12px;
    padding: 28px 24px;
    margin-bottom: 16px;
  }
  .agreement-body h3 {
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 16px;
    color: #fff;
    margin-top: 24px;
    margin-bottom: 8px;
  }
  .agreement-body h3:first-child { margin-top: 0; }
  .agreement-body p {
    font-size: 15px;
    color: #aaa;
    line-height: 1.7;
    margin-bottom: 12px;
  }
  .agreement-body p:last-child { margin-bottom: 0; }
  .agreement-header {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: #666;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #222;
  }
  .agreement-discount {
    background: linear-gradient(135deg, #1a1708, #161616);
    border-left: 3px solid #F5A623;
    padding: 14px 18px;
    margin: 12px 0;
    border-radius: 0 10px 10px 0;
    font-size: 15px;
    color: #ccc;
    line-height: 1.7;
  }
  .agreement-view-link {
    font-size: 14px;
    color: #F5A623;
    margin-top: 8px;
    cursor: pointer;
    padding: 8px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .agreement-view-link:hover { text-decoration: underline; }

  /* Submit button */
  .form-submit {
    width: 100%;
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 20px;
    color: #111;
    background: #F5A623;
    border: none;
    padding: 18px 32px;
    border-radius: 12px;
    cursor: pointer;
    min-height: 56px;
    margin-top: 8px;
    transition: opacity 0.15s;
  }
  .form-submit:hover { background: #e6951e; }
  .form-submit:active { background: #d4880f; transform: scale(0.98); }
  .form-submit:disabled {
    opacity: 0.4;
    cursor: not-allowed;
  }
  .form-submit:disabled:hover { background: #F5A623; }
  .form-submit:disabled:active { transform: none; }
  .form-note {
    font-size: 14px;
    color: #666;
    text-align: center;
    margin-top: 16px;
    line-height: 1.6;
  }
  .form-success {
    text-align: center;
    padding: 32px 0;
    display: none;
  }
  .form-success h3 {
    font-family: 'Unbounded', sans-serif;
    font-weight: 700;
    font-size: 22px;
    color: #22c55e;
    margin-bottom: 12px;
  }
  .form-success p {
    font-size: 17px;
    color: #aaa;
    line-height: 1.7;
  }

  /* GIF overlay */
  .gif-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    cursor: pointer;
  }
  .gif-overlay.active { display: flex; }
  .gif-overlay img {
    max-width: 90%;
    max-height: 60vh;
    border-radius: 12px;
  }
  .gif-overlay-text {
    font-family: 'Inter', sans-serif;
    font-size: 14px;
    color: #666;
    margin-top: 20px;
  }

  /* FAQ */
  .faq-list { margin-top: 24px; }
  .faq-item {
    border-bottom: 1px solid #1a1a1a;
    padding: 20px 0;
  }
  .faq-item:first-child { padding-top: 0; }
  .faq-item:last-child { border-bottom: none; }
  .faq-q {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 17px;
    color: #fff;
    margin-bottom: 8px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    min-height: 44px;
  }
  .faq-q::after {
    content: '+';
    font-family: 'JetBrains Mono', monospace;
    font-size: 22px;
    color: #F5A623;
    flex-shrink: 0;
    min-width: 44px;
    text-align: center;
  }
  .faq-item.open .faq-q::after {
    content: '-';
  }
  .faq-a {
    font-size: 16px;
    color: #aaa;
    line-height: 1.8;
    display: none;
    padding-right: 44px;
  }
  .faq-item.open .faq-a { display: block; }

  /* Nav bar */
  .nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: rgba(17, 17, 17, 0.92);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid #1f1f1f;
  }
  .nav-logo {
    font-family: 'Unbounded', sans-serif;
    font-weight: 900;
    font-size: 20px;
    color: #F5A623;
    letter-spacing: 2px;
    text-decoration: none;
  }
  .nav-hamburger {
    width: 44px;
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
  }
  .nav-hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: #d4d4d4;
    border-radius: 1px;
    transition: all 0.25s;
  }
  .nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-hamburger.open span:nth-child(2) { opacity: 0; }
  .nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .nav-drawer {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    background: #161616;
    border-left: 1px solid #2a2a2a;
    z-index: 99;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    padding: 80px 24px 40px;
    display: flex;
    flex-direction: column;
    gap: 0;
  }
  .nav-drawer.open { transform: translateX(0); }
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 98;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
  }
  .nav-overlay.open { opacity: 1; pointer-events: auto; }
  .nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 0;
    border-bottom: 1px solid #222;
    text-decoration: none;
    transition: color 0.15s;
  }
  .nav-link:last-child { border-bottom: none; }
  .nav-link-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    color: #666;
  }
  .nav-link-text {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 16px;
    color: #d4d4d4;
  }
  .nav-link:hover .nav-link-text { color: #F5A623; }
  .nav-link:hover .nav-link-icon { color: #F5A623; }
  .nav-link-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 4px;
    background: rgba(245, 166, 35, 0.15);
    color: #F5A623;
    margin-left: auto;
  }

  /* Footer */
  .footer {
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid #1a1a1a;
    margin-top: 56px;
  }
  .footer p { font-size: 14px; color: #555; }
  .footer .meaning { font-style: italic; color: #666; margin-top: 6px; font-size: 15px; }
  .footer .builder { color: #555; margin-top: 16px; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; }

  /* ===== TABLET+ (min-width: 640px) ===== */
  @media (min-width: 640px) {
    .hero { padding: 80px 32px 64px; }
    .hero-logo { font-size: 56px; }
    .hero-kanji { font-size: 44px; }
    .hero-tagline { font-size: 26px; }
    .content { padding: 0 32px 80px; }
    .section h2 { font-size: 28px; }
    .step-number { font-size: 40px; min-width: 52px; }
    .step-content h3 { font-size: 20px; }
    .cta { padding: 56px 40px; }
  }