:root {
      --gold: #c9a45c;
      --gold-bright: #e6c98a;
      --gold-deep: #8a6a34;
      --ink: #0b0a08;
      --ink-2: #14120d;
      --ink-3: #1d1a14;
      --ink-4: #26221a;
      --paper: #f3ede2;
      --muted: #8d8572;
      --line: rgba(201, 164, 92, 0.22);
      --red: #d96a5a;
      --r-lg: 20px;
      --r-md: 14px;
      --r-sm: 10px;
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: 'Inter', sans-serif;
      background: var(--ink);
      color: var(--paper);
      min-height: 100vh;
      overflow-x: hidden;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    ::selection { background: rgba(201, 164, 92, 0.35); color: var(--gold-bright); }

    /* ---- Static ambient background ---- */
    .aurora {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      background:
        radial-gradient(50% 40% at 15% 0%, rgba(201, 164, 92, 0.13) 0%, transparent 60%),
        radial-gradient(45% 40% at 90% 25%, rgba(201, 164, 92, 0.07) 0%, transparent 55%),
        radial-gradient(55% 45% at 50% 110%, rgba(201, 164, 92, 0.10) 0%, transparent 60%);
    }

    /* ================= 3D CHAIN BACKGROUND ================= */

    .chain-bg {
      position: fixed;
      inset: 0;
      width: 100%;
      height: 100%;
      z-index: 1;
      pointer-events: none;
      opacity: 0.55;
    }

    /* ================= MASTHEAD ================= */

    .masthead {
      position: relative;
      z-index: 2;
      padding: 96px 24px 48px;
      text-align: center;
    }

    @keyframes fadeDown {
      from { opacity: 0; transform: translateY(-12px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .display {
      font-family: 'Cormorant Garamond', serif;
      font-weight: 600;
      font-size: clamp(3.4rem, 10vw, 7.5rem);
      line-height: 0.95;
      letter-spacing: -0.01em;
      background: linear-gradient(180deg, #f4e3bd 0%, var(--gold-bright) 45%, var(--gold-deep) 100%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      opacity: 0;
      animation: riseIn 0.9s 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
      filter: drop-shadow(0 6px 30px rgba(201, 164, 92, 0.2));
    }

    @keyframes riseIn {
      from { opacity: 0; transform: translateY(28px); }
      to { opacity: 1; transform: translateY(0); }
    }

    .display .thin {
      font-weight: 400;
      font-style: italic;
      -webkit-text-fill-color: var(--paper);
    }

    .rule {
      width: 90px;
      height: 2px;
      margin: 32px auto 24px;
      background: linear-gradient(90deg, transparent, var(--gold), transparent);
      opacity: 0;
      animation: fadeDown 0.8s 0.9s ease-out forwards;
    }

    .tagline {
      color: var(--muted);
      font-size: 0.9rem;
      font-weight: 300;
      letter-spacing: 0.22em;
      text-transform: uppercase;
      opacity: 0;
      animation: fadeDown 0.8s 1.05s ease-out forwards;
    }

    /* ================= PANEL ================= */

    .shell {
      position: relative;
      z-index: 2;
      max-width: 980px;
      margin: 0 auto;
      padding: 0 24px 110px;
    }

    .panel {
      position: relative;
      background: linear-gradient(180deg, var(--ink-2), var(--ink-3));
      border: 1px solid var(--line);
      border-radius: var(--r-lg);
      padding: 60px 56px;
      box-shadow: 0 40px 120px rgba(0, 0, 0, 0.6);
      opacity: 0;
      animation: riseIn 0.9s 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    }

    @media (max-width: 640px) {
      .panel { padding: 40px 22px; }
    }

    /* ================= SCROLL REVEAL ================= */

    .reveal-on-scroll {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                  transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .reveal-on-scroll.visible {
      opacity: 1;
      transform: none; /* no lingering stacking context */
    }

    /* ================= SECTION HEADS ================= */

    .section {
      margin-bottom: 52px;
      position: relative;
      z-index: 1;
    }

    /* raise the section that owns the open dropdown */
    .section:has(.dropdown.open) { z-index: 50; }

    .section-head {
      display: flex;
      align-items: center;
      gap: 18px;
      margin-bottom: 24px;
    }

    .section-num {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.4rem;
      color: var(--gold-deep);
      font-style: italic;
    }

    .section-title {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.6rem;
      font-weight: 600;
      color: var(--gold-bright);
      letter-spacing: 0.02em;
    }

    .section-line {
      flex: 1;
      height: 1px;
      background: linear-gradient(90deg, var(--line), transparent);
    }

    /* ================= NOTICE ================= */

    .notice {
      position: relative;
      border: 1px solid rgba(217, 106, 90, 0.3);
      background: linear-gradient(135deg, rgba(217, 106, 90, 0.07), rgba(217, 106, 90, 0.02));
      padding: 30px 32px;
      margin-bottom: 52px;
      border-radius: var(--r-md);
    }

    .notice-head {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }

    .notice-mark {
      width: 38px; height: 38px;
      flex-shrink: 0;
      border: 1px solid rgba(217, 106, 90, 0.45);
      border-radius: 50%;
      display: grid;
      place-items: center;
    }

    .notice-mark svg { width: 18px; height: 18px; stroke: var(--red); }

    .notice-title {
      color: var(--red);
      font-weight: 600;
      font-size: 0.92rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .notice-body {
      color: rgba(243, 237, 226, 0.78);
      font-size: 0.92rem;
    }

    .guides {
      margin-top: 20px;
      border-top: 1px solid rgba(217, 106, 90, 0.18);
      padding-top: 18px;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .guides h4 {
      color: var(--gold-bright);
      font-size: 0.78rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      margin-bottom: 2px;
      font-weight: 500;
    }

    .guide {
      border: 1px solid rgba(217, 106, 90, 0.2);
      border-radius: var(--r-sm);
      background: rgba(11, 10, 8, 0.5);
      overflow: hidden;
    }

    .guide-head {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 13px 18px;
      background: none;
      border: none;
      cursor: pointer;
      font-family: 'Inter', sans-serif;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--paper);
      transition: background 0.25s ease;
    }

    .guide-head:hover { background: rgba(217, 106, 90, 0.07); }

    .guide-name { letter-spacing: 0.04em; }

    .guide-arrow {
      width: 15px; height: 15px;
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .guide-arrow svg { width: 100%; height: 100%; stroke: var(--gold); }

    .guide.open .guide-arrow { transform: rotate(180deg); }

    .guide-body {
      display: grid;
      grid-template-rows: 0fr;
      transition: grid-template-rows 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .guide-body > .guide-inner { overflow: hidden; }

    .guide.open .guide-body { grid-template-rows: 1fr; }

    .guide-inner ol {
      padding: 4px 18px 16px 40px;
      display: flex;
      flex-direction: column;
      gap: 7px;
    }

    .guide-inner li {
      color: var(--muted);
      font-size: 0.86rem;
    }

    .guide-inner li::marker {
      color: var(--gold);
      font-weight: 600;
    }

    .guide-inner strong { color: var(--gold-bright); font-weight: 600; }

    /* ================= FIELDS ================= */

    .field { margin-bottom: 18px; }

    .field > label {
      display: block;
      font-size: 0.7rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 9px;
      font-weight: 500;
      transition: color 0.3s ease;
    }

    .field:focus-within > label { color: var(--gold-bright); }

    input[type="text"],
    input[type="email"],
    input[type="password"] {
      width: 100%;
      padding: 15px 16px;
      background: var(--ink);
      border: 1px solid var(--line);
      border-radius: var(--r-sm);
      color: var(--paper);
      font-size: 0.95rem;
      font-family: 'Inter', sans-serif;
      transition: border-color 0.25s ease, box-shadow 0.25s ease;
      outline: none;
    }

    input::placeholder { color: #5c5648; }

    .hint {
      margin-top: 8px;
      font-size: 0.8rem;
      color: var(--muted);
    }

    .pay-title { font-size: 0.95rem; margin-bottom: 4px; }

    .wallet-row {
      display: flex;
      gap: 8px;
      align-items: center;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--gold);
      border-radius: 8px;
      padding: 10px 12px;
      margin: 10px 0;
    }
    .wallet-row code {
      flex: 1;
      font-size: 0.85rem;
      word-break: break-all;
      color: var(--gold);
    }
    .mini {
      background: none;
      border: 1px solid var(--gold);
      color: var(--gold);
      padding: 4px 10px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 0.8rem;
    }
    .mini:hover { background: rgba(201, 164, 92, 0.1); }

    #submitTxButton { margin-top: 12px; }

    .net-row { display: flex; gap: 8px; margin: 8px 0; flex-wrap: wrap; }
    .net-chip {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid #3a362c;
      color: var(--muted);
      padding: 6px 12px;
      border-radius: 999px;
      cursor: pointer;
      font-size: 0.82rem;
    }
    .net-chip:hover { border-color: var(--gold); }
    .net-chip.active { border-color: var(--gold); color: var(--gold); }

    input:focus {
      border-color: var(--gold);
      box-shadow: 0 0 0 1px var(--gold), 0 0 24px rgba(201, 164, 92, 0.1);
    }

    .grid-2 {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    @media (max-width: 600px) {
      .grid-2 { grid-template-columns: 1fr; }
    }

    /* ================= CUSTOM DROPDOWN ================= */

    .dropdown { position: relative; user-select: none; }

    .dd-trigger {
      width: 100%;
      padding: 15px 48px 15px 16px;
      background: var(--ink);
      border: 1px solid var(--line);
      border-radius: var(--r-sm);
      color: var(--paper);
      font-size: 0.95rem;
      font-family: 'Inter', sans-serif;
      text-align: left;
      cursor: pointer;
      position: relative;
      transition: border-color 0.25s ease, box-shadow 0.25s ease;
      outline: none;
    }

    .dd-trigger:hover, .dd-trigger:focus {
      border-color: var(--gold);
      box-shadow: 0 0 24px rgba(201, 164, 92, 0.08);
    }

    .dd-trigger .value.placeholder { color: #5c5648; }

    .dd-trigger .chev {
      position: absolute;
      right: 16px;
      top: 50%;
      width: 16px; height: 16px;
      transform: translateY(-50%);
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .dd-trigger .chev svg { width: 100%; height: 100%; stroke: var(--gold); }

    .dropdown.open .chev { transform: translateY(-50%) rotate(180deg); }

    .dd-menu {
      position: absolute;
      top: calc(100% + 10px);
      left: 0; right: 0;
      background: var(--ink-4);
      border: 1px solid rgba(201, 164, 92, 0.35);
      border-radius: var(--r-md);
      overflow: hidden;
      z-index: 100;
      box-shadow: 0 24px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(201, 164, 92, 0.1);
      opacity: 0;
      transform: translateY(-8px);
      pointer-events: none;
      transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .dropdown.open .dd-menu {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

    .dd-option {
      padding: 14px 18px;
      cursor: pointer;
      color: var(--muted);
      font-size: 0.92rem;
      position: relative;
      transition: background 0.2s ease, color 0.2s ease, padding 0.2s ease;
    }

    .dd-option + .dd-option { border-top: 1px solid rgba(201, 164, 92, 0.08); }

    .dd-option:hover, .dd-option.highlight {
      background: rgba(201, 164, 92, 0.1);
      color: var(--gold-bright);
    }

    .dd-option.selected { color: var(--gold-bright); }

    .dd-option.selected::after {
      content: '';
      position: absolute;
      right: 18px; top: 50%;
      width: 6px; height: 6px;
      border: solid var(--gold);
      border-width: 0 2px 2px 0;
      transform: translateY(-60%) rotate(45deg);
    }

    /* ================= PLATFORM REVEAL ================= */

    .platform-reveal {
      display: grid;
      grid-template-rows: 0fr;
      transition: grid-template-rows 0.45s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .platform-reveal > div { overflow: hidden; }
    .platform-reveal.active { grid-template-rows: 1fr; }

    .cred-box {
      margin-top: 22px;
      padding: 28px;
      border: 1px solid var(--line);
      background: var(--ink);
      border-radius: var(--r-md);
      opacity: 0;
      transform: translateY(-8px);
      transition: opacity 0.4s 0.15s ease, transform 0.4s 0.15s ease;
    }

    .platform-reveal.active .cred-box {
      opacity: 1;
      transform: translateY(0);
    }

    .cred-box h4 {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.15rem;
      color: var(--gold-bright);
      font-weight: 600;
      margin-bottom: 16px;
    }

    /* ================= TIERS ================= */

    .tiers {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    @media (max-width: 720px) {
      .tiers { grid-template-columns: repeat(2, 1fr); }
    }

    .tier {
      position: relative;
      padding: 26px 16px 22px;
      text-align: center;
      border: 1px solid var(--line);
      border-radius: var(--r-md);
      background: var(--ink);
      cursor: pointer;
      transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    }

    .tier:hover {
      border-color: var(--gold);
      transform: translateY(-3px);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    }

    .tier.selected {
      border-color: var(--gold);
      background: rgba(201, 164, 92, 0.08);
      box-shadow: 0 0 24px rgba(201, 164, 92, 0.12);
    }

    .tier-badge {
      position: absolute;
      top: 10px; right: 10px;
      width: 22px; height: 22px;
      background: var(--gold);
      border-radius: 50%;
      display: grid;
      place-items: center;
      opacity: 0;
      transform: scale(0.4);
      transition: opacity 0.25s ease, transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    .tier.selected .tier-badge {
      opacity: 1;
      transform: scale(1);
    }

    .tier-badge svg {
      width: 11px; height: 11px;
      stroke: var(--ink);
    }

    .tier-amount {
      font-family: 'Cormorant Garamond', serif;
      font-size: 1.9rem;
      font-weight: 600;
      color: var(--gold-bright);
      line-height: 1;
      margin-bottom: 8px;
    }

    .tier-label {
      font-size: 0.66rem;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 10px;
    }

    .tier-price {
      font-size: 0.95rem;
      color: var(--paper);
      font-weight: 500;
    }

    /* ================= CONSENT ================= */

    .consent {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      padding: 22px 24px;
      border: 1px solid var(--line);
      border-radius: var(--r-md);
      background: var(--ink);
      cursor: pointer;
      transition: border-color 0.25s ease;
    }

    .consent:hover { border-color: rgba(201, 164, 92, 0.5); }

    .consent .box-wrap {
      position: relative;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .consent input {
      appearance: none;
      width: 22px; height: 22px;
      border: 1px solid var(--gold-deep);
      border-radius: 7px;
      background: var(--ink);
      cursor: pointer;
      transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
    }

    .consent input:checked {
      background: var(--gold);
      border-color: var(--gold);
      box-shadow: 0 0 12px rgba(201, 164, 92, 0.35);
    }

    .consent .check {
      position: absolute;
      top: 5px; left: 4px;
      width: 13px; height: 13px;
      stroke: var(--ink);
      stroke-width: 3;
      fill: none;
      stroke-linecap: round;
      stroke-linejoin: round;
      stroke-dasharray: 24;
      stroke-dashoffset: 24;
      transition: stroke-dashoffset 0.3s 0.05s ease;
      pointer-events: none;
    }

    .consent input:checked ~ .check { stroke-dashoffset: 0; }

    .consent-text {
      color: var(--muted);
      font-size: 0.88rem;
      line-height: 1.55;
      transition: color 0.25s ease;
    }

    .consent:hover .consent-text { color: var(--paper); }

    /* ================= CTA ================= */

    .cta {
      width: 100%;
      padding: 20px 32px;
      border: none;
      border-radius: var(--r-md);
      background: linear-gradient(120deg, var(--gold-bright), var(--gold) 55%, var(--gold-deep));
      color: var(--ink);
      font-family: 'Inter', sans-serif;
      font-size: 0.92rem;
      font-weight: 600;
      letter-spacing: 0.22em;
      text-transform: uppercase;
      cursor: pointer;
      position: relative;
      overflow: hidden;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      box-shadow: 0 12px 40px rgba(201, 164, 92, 0.22);
    }

    .cta::before {
      content: '';
      position: absolute;
      top: 0; left: -120%;
      width: 60%; height: 100%;
      background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.4), transparent);
      transform: skewX(-20deg);
      transition: left 0.6s ease;
    }

    .cta:hover { transform: translateY(-2px); box-shadow: 0 16px 50px rgba(201, 164, 92, 0.32); }
    .cta:hover::before { left: 160%; }
    .cta:active { transform: translateY(0); }
    .cta:disabled { opacity: 0.6; cursor: not-allowed; }

    .spinner {
      display: inline-block;
      width: 16px; height: 16px;
      border: 2px solid rgba(11, 10, 8, 0.35);
      border-top-color: var(--ink);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
      vertical-align: -3px;
      margin-right: 10px;
    }

    @keyframes spin { to { transform: rotate(360deg); } }

    /* ================= FEEDBACK ================= */

    #confirmationMessage {
      text-align: center;
      margin-top: 20px;
      min-height: 22px;
      font-size: 0.9rem;
      font-weight: 500;
      letter-spacing: 0.04em;
      opacity: 0;
      transform: translateY(6px);
      transition: opacity 0.35s ease, transform 0.35s ease;
    }

    #confirmationMessage.show { opacity: 1; transform: translateY(0); }

    .msg-ok { color: #7fc98a; }
    .msg-ok a { color: #e6c98a; text-decoration: underline; }
    .msg-err { color: var(--red); }

    /* ================= STRIP ================= */

    .strip {
      position: relative;
      z-index: 2;
      display: flex;
      justify-content: center;
      gap: 44px;
      margin-top: 48px;
      flex-wrap: wrap;
    }

    .strip-item {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--muted);
      font-size: 0.76rem;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      transition: color 0.25s ease;
    }

    .strip-item svg { width: 16px; height: 16px; stroke: var(--gold); }

    .strip-item:hover { color: var(--paper); }