/* ================================================================
   USDT Airdrop – Full CSS (English-only, Tiered Referral Edition)
   ================================================================ */

:root {
  --bg:            #080c14;
  --surface:       rgba(255,255,255,0.05);
  --border:        rgba(255,255,255,0.10);
  --primary:       #26c6da;
  --primary-dark:  #0097a7;
  --gold:          #f5a623;
  --gold-dark:     #c67c00;
  --green:         #4caf50;
  --purple:        #ab47bc;
  --red:           #ef5350;
  --text:          #f0f4f8;
  --muted:         #8899aa;
  --radius-sm:     8px;
  --radius:        16px;
  --radius-lg:     24px;
  --shadow:        0 8px 40px rgba(0,0,0,0.5);
  --transition:    0.3s ease;
  --font:          'Inter', system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

/* background glow */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(38,198,218,.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(245,166,35,.10) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 30%, rgba(103,58,183,.12) 0%, transparent 40%);
  pointer-events: none;
  z-index: 0;
}

/* floating particles */
@keyframes float-particle {
  0%,100% { transform: translateY(0) rotate(0deg); opacity: .6; }
  50%      { transform: translateY(-28px) rotate(180deg); opacity: .2; }
}
.particle {
  position: fixed;
  border-radius: 50%;
  background: radial-gradient(circle, var(--primary), transparent);
  animation: float-particle linear infinite;
  pointer-events: none;
  z-index: 0;
}

/* layout */
.container {
  position: relative;
  z-index: 1;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

/* glass card */
section {
  background: var(--surface);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition);
}
section:hover { transform: translateY(-2px); }

.section-title {
  font-size: .9rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: .9rem;
}

/* ── Hero ─────────────────────────────────────────── */
.hero {
  background-size: cover;
  background-position: center;
  text-align: center;
  padding: 2.5rem 1.4rem 2rem;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(8,12,20,.55), rgba(8,12,20,.88));
  border-radius: inherit;
}
.hero > * { position: relative; z-index: 1; }

.logo {
  width: 72px; height: 72px;
  object-fit: contain;
  border-radius: 50%;
  border: 2px solid var(--primary);
  margin-bottom: .8rem;
  animation: pulse-glow 3s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%,100% { box-shadow: 0 0 20px rgba(38,198,218,.4); }
  50%      { box-shadow: 0 0 44px rgba(38,198,218,.9); }
}

h1 {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, #fff 30%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .5rem;
}
.subtitle {
  font-size: .97rem;
  color: rgba(240,244,248,.85);
  line-height: 1.55;
}
.subtitle strong { color: var(--gold); font-size: 1.1rem; }
.badge {
  display: inline-block;
  margin-top: .8rem;
  padding: .25rem .8rem;
  background: rgba(245,166,35,.18);
  border: 1px solid rgba(245,166,35,.4);
  border-radius: 999px;
  font-size: .77rem;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .05em;
}

/* ── Notice bar ───────────────────────────────────── */
.notice-bar {
  display: flex;
  align-items: center;
  gap: .6rem;
  background: rgba(76,175,80,.10);
  border: 1px solid rgba(76,175,80,.28);
  border-radius: var(--radius-sm);
  padding: .6rem 1rem;
  font-size: .82rem;
  color: #aee8b0;
}
.notice-bar .icon { font-size: 1.1rem; flex-shrink: 0; }

/* ── Countdown ────────────────────────────────────── */
.countdown { text-align: center; padding: 1.2rem; }
.countdown-label {
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .6rem;
}
.timer-grid {
  display: flex;
  justify-content: center;
  gap: .5rem;
}
.timer-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  width: 66px;
  padding: .5rem .2rem;
}
.timer-block .num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.timer-block .label {
  font-size: .58rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-top: .2rem;
}
.timer-sep {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  align-self: center;
  opacity: .5;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 0%,100%{opacity:.5} 50%{opacity:0} }

/* ── Progress ─────────────────────────────────────── */
.progress-wrapper {
  background: rgba(255,255,255,.06);
  border-radius: 999px;
  height: 16px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--gold));
  border-radius: 999px;
  transition: width 1.5s cubic-bezier(.4,0,.2,1);
  position: relative;
  overflow: hidden;
}
.progress-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.3), transparent);
  animation: shimmer 2s linear infinite;
}
@keyframes shimmer { 0%{transform:translateX(-100%)} 100%{transform:translateX(100%)} }
.progress-meta {
  display: flex;
  justify-content: space-between;
  margin-top: .45rem;
  font-size: .78rem;
  color: var(--muted);
}
#progressText { font-weight: 600; color: var(--text); }

/* ── Live Ticker ──────────────────────────────────── */
.ticker { overflow: hidden; padding: .5rem 0; }
.ticker-inner {
  display: flex;
  gap: 2.2rem;
  animation: ticker-scroll 18s linear infinite;
  white-space: nowrap;
}
@keyframes ticker-scroll { 0%{transform:translateX(0)} 100%{transform:translateX(-50%)} }
.ticker-item { font-size: .79rem; color: var(--muted); }
.ticker-item strong { color: var(--green); margin-right: .3rem; }

/* ── Reward Tiers ─────────────────────────────────── */
.tiers-note {
  font-size: .83rem;
  color: var(--muted);
  margin-bottom: 1rem;
  line-height: 1.55;
}
.tier-list { display: flex; flex-direction: column; gap: .5rem; }
.tier-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .65rem .9rem;
  transition: all var(--transition);
}
.tier-row:hover { background: rgba(38,198,218,.07); border-color: rgba(38,198,218,.25); }
.tier-row.tier-base { border-color: rgba(38,198,218,.2); }
.tier-row.tier-top  { border-color: rgba(245,166,35,.35); background: rgba(245,166,35,.06); }

.tier-left { display: flex; align-items: center; gap: .6rem; }
.tier-badge {
  font-size: .68rem;
  font-weight: 700;
  padding: .2rem .55rem;
  border-radius: 999px;
  letter-spacing: .05em;
  flex-shrink: 0;
}
.tier-0 { background: rgba(38,198,218,.2);  color: var(--primary); border: 1px solid rgba(38,198,218,.4); }
.tier-1 { background: rgba(76,175,80,.18);  color: #81c784;        border: 1px solid rgba(76,175,80,.35); }
.tier-2 { background: rgba(103,58,183,.22); color: #ce93d8;        border: 1px solid rgba(103,58,183,.4); }
.tier-3 { background: rgba(245,166,35,.18); color: var(--gold);    border: 1px solid rgba(245,166,35,.35); }
.tier-4 { background: rgba(239,83,80,.18);  color: #ef9a9a;        border: 1px solid rgba(239,83,80,.35); }
.tier-5 { background: linear-gradient(135deg, rgba(245,166,35,.3), rgba(239,83,80,.25)); color: #ffcc80; border: 1px solid rgba(245,166,35,.5); }

.tier-label { font-size: .84rem; color: var(--muted); }
.tier-label strong { color: var(--text); }
.tier-right { text-align: right; }
.tier-amount {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}
.tier-amount small { font-size: .7rem; font-weight: 400; color: var(--muted); margin-left: .15rem; }
.tier-amount.tier-gold { color: var(--gold); }
.tiers-footnote {
  margin-top: .8rem;
  font-size: .75rem;
  color: var(--muted);
  line-height: 1.5;
}

/* ── Registration Form ────────────────────────────── */
.form-hint {
  font-size: .83rem;
  color: var(--muted);
  margin-bottom: 1rem;
  line-height: 1.55;
}
.claim-form label {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: .05em;
  text-transform: uppercase;
  margin-top: .9rem;
  margin-bottom: .3rem;
}
.input-wrap { position: relative; }
.input-wrap .input-icon {
  position: absolute;
  left: .7rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  pointer-events: none;
}
.claim-form select,
.claim-form input {
  width: 100%;
  padding: .7rem 1rem .7rem 2.3rem;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: .93rem;
  font-family: var(--font);
  outline: none;
  transition: border var(--transition), box-shadow var(--transition);
  -webkit-appearance: none;
  appearance: none;
}
.claim-form select:focus,
.claim-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(38,198,218,.18);
}
.claim-form select option { background: #1a2030; color: var(--text); }

#claimBtn {
  width: 100%;
  margin-top: 1.1rem;
  padding: .9rem;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: .97rem;
  font-weight: 700;
  letter-spacing: .04em;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
#claimBtn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  opacity: 0;
  transition: opacity var(--transition);
}
#claimBtn:hover::before { opacity: 1; }
#claimBtn span { position: relative; z-index: 1; }
#claimBtn:active { transform: scale(.97); }

.status {
  margin-top: .7rem;
  font-size: .85rem;
  min-height: 1.1rem;
  text-align: center;
  font-weight: 600;
}

/* ── Invitation Policy Card ─────────────────────────────── */
.invite-policy {
  margin-top: 1.2rem;
  background: rgba(245,166,35,.06);
  border: 1px solid rgba(245,166,35,.22);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
}
.invite-policy-header {
  display: flex;
  align-items: center;
  gap: .45rem;
  margin-bottom: .65rem;
}
.invite-policy-icon { font-size: 1.15rem; }
.invite-policy-title {
  font-size: .88rem;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: .03em;
}
.invite-policy-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: .4rem;
}
.invite-policy-list li {
  font-size: .78rem;
  color: var(--muted);
  line-height: 1.5;
  padding-left: .15rem;
}
.invite-policy-list li strong {
  color: var(--text);
  font-weight: 600;
}

/* ── Tier muted amount ──────────────────────────────────── */
.tier-muted { color: var(--muted) !important; }

/* ── Referral Panel ───────────────────────────────── */
.referral-panel { }
.ref-intro {
  font-size: .83rem;
  color: var(--muted);
  margin-bottom: 1rem;
  line-height: 1.55;
}
.ref-code-box {
  background: rgba(38,198,218,.08);
  border: 1px solid rgba(38,198,218,.3);
  border-radius: var(--radius-sm);
  padding: .8rem 1rem;
  text-align: center;
  margin-bottom: .8rem;
}
.ref-code-label {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: .25rem;
}
.ref-code {
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--primary);
  font-family: monospace;
}
.ref-link-row {
  display: flex;
  gap: .5rem;
}
.ref-link-input {
  flex: 1;
  padding: .6rem .8rem;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: .78rem;
  font-family: monospace;
  outline: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.copy-btn {
  padding: .6rem 1rem;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-weight: 700;
  font-size: .84rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition);
}
.copy-btn:hover { background: linear-gradient(135deg, var(--gold-dark), var(--gold)); }
.copy-feedback {
  font-size: .78rem;
  color: var(--green);
  min-height: 1.1rem;
  margin-top: .35rem;
}

.my-tier {
  margin-top: 1rem;
  background: rgba(245,166,35,.06);
  border: 1px solid rgba(245,166,35,.22);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
}
.my-tier-label {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--muted);
  margin-bottom: .2rem;
}
.my-tier-value {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--gold);
  margin-bottom: .2rem;
}
.my-tier-invites {
  font-size: .8rem;
  color: var(--muted);
}
.my-tier-invites strong { color: var(--text); }

.tier-progress-wrap {
  height: 6px;
  background: rgba(255,255,255,.06);
  border-radius: 999px;
  margin-top: .7rem;
  overflow: hidden;
}
.tier-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 999px;
  transition: width .8s ease;
  width: 0%;
}
.tier-next-hint {
  font-size: .75rem;
  color: var(--muted);
  margin-top: .35rem;
  text-align: center;
}

/* ── Steps ────────────────────────────────────────── */
.step-cards { display: flex; flex-direction: column; gap: .75rem; }
.step-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .75rem 1rem;
  transition: background var(--transition);
}
.step-card:hover { background: rgba(38,198,218,.07); border-color: rgba(38,198,218,.28); }
.step-number {
  flex-shrink: 0;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: .95rem;
  color: #fff;
  box-shadow: 0 0 14px rgba(38,198,218,.35);
}
.step-card p { font-size: .85rem; color: var(--muted); line-height: 1.5; }

/* ── FAQ ──────────────────────────────────────────── */
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: .85rem 0;
  cursor: pointer;
  user-select: none;
}
.faq-item:last-child { border-bottom: none; padding-bottom: 0; }
.faq-item h3 {
  font-size: .9rem;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .5rem;
}
.faq-item h3::after {
  content: '＋';
  color: var(--primary);
  font-size: 1rem;
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.open h3::after { transform: rotate(45deg); }
.faq-item p {
  font-size: .8rem;
  color: var(--muted);
  margin-top: .5rem;
  line-height: 1.6;
  display: none;
}
.faq-item.open p { display: block; }

/* ── Invite btn (shared) ──────────────────────────── */
.invite-btn {
  display: inline-block;
  padding: .55rem 1.4rem;
  background: linear-gradient(135deg, var(--gold-dark), var(--gold));
  border: none;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  font-size: .88rem;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}
.invite-btn:hover { transform: scale(1.04); box-shadow: 0 0 20px rgba(245,166,35,.4); }

/* ── Footer ───────────────────────────────────────── */
.footer {
  text-align: center;
  font-size: .78rem;
  color: var(--muted);
  padding: .4rem;
}

/* ── Animations on load ───────────────────────────── */
@keyframes slide-up {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}
section { animation: slide-up .5s ease both; }
section:nth-child(1) { animation-delay: .05s; }
section:nth-child(2) { animation-delay: .10s; }
section:nth-child(3) { animation-delay: .15s; }
section:nth-child(4) { animation-delay: .20s; }
section:nth-child(5) { animation-delay: .25s; }
section:nth-child(6) { animation-delay: .30s; }
section:nth-child(7) { animation-delay: .35s; }

/* ── Success Modal ────────────────────────────────── */
@keyframes modal-backdrop-in { from{opacity:0} to{opacity:1} }
@keyframes modal-bounce-in {
  0%   { opacity:0; transform:scale(.72) translateY(36px); }
  60%  { opacity:1; transform:scale(1.04) translateY(-5px); }
  80%  { transform:scale(.97) translateY(2px); }
  100% { transform:scale(1) translateY(0); }
}
@keyframes confetti-fall {
  0%   { transform:translateY(-8px) rotate(0deg); opacity:1; }
  100% { transform:translateY(65px) rotate(360deg); opacity:0; }
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8,12,20,.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  animation: modal-backdrop-in .25s ease;
}
.modal-card {
  position: relative;
  background: linear-gradient(150deg, #111827, #0d1520);
  border: 1px solid rgba(38,198,218,.32);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem 1.5rem;
  width: 100%;
  max-width: 370px;
  box-shadow: 0 0 60px rgba(38,198,218,.18), 0 20px 60px rgba(0,0,0,.6);
  text-align: center;
  animation: modal-bounce-in .48s cubic-bezier(.34,1.56,.64,1);
  overflow: hidden;
}
.modal-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--gold));
}
.modal-icon { font-size: 3rem; margin-bottom: .5rem; display: block; }
.modal-title {
  font-size: 1.45rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fff 40%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: .3rem;
}
.modal-subtitle { font-size: .86rem; color: var(--muted); margin-bottom: 1.1rem; }

.modal-info {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .55rem .8rem;
  margin-bottom: 1.1rem;
  text-align: left;
}
.modal-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .4rem 0;
  border-bottom: 1px solid rgba(255,255,255,.05);
  gap: .4rem;
}
.modal-row:last-child { border-bottom: none; }
.modal-label {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  flex-shrink: 0;
}
.modal-value {
  font-size: .83rem;
  font-weight: 600;
  color: var(--text);
  text-align: right;
  word-break: break-all;
}
.modal-addr { font-size: .73rem; font-family: monospace; color: var(--primary); }
.modal-gold { color: var(--gold); font-size: .95rem; }
.modal-code { font-family: monospace; font-size: 1rem; letter-spacing: .15em; color: var(--primary); }

.modal-confetti { position: absolute; inset: 0; pointer-events: none; overflow: hidden; border-radius: inherit; }
.confetti-dot {
  position: absolute;
  top: 8%;
  opacity: 0;
  animation: confetti-fall 1.3s ease-out forwards;
}

.modal-close-btn {
  width: 100%;
  padding: .78rem;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  border: none;
  border-radius: var(--radius-sm);
  color: #fff;
  font-size: .97rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  margin-bottom: .75rem;
  font-family: var(--font);
}
.modal-close-btn:hover { background: linear-gradient(135deg, var(--gold-dark), var(--gold)); transform: scale(1.02); }
.modal-share { font-size: .76rem; color: var(--muted); }

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 360px) {
  .container { padding: 0 .5rem 1.5rem; }
  h1 { font-size: 1.8rem; }
  .timer-block { width: 56px; }
  .timer-block .num { font-size: 1.5rem; }
  .ref-code { font-size: 1.4rem; }
}