@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ═══ RESET & BASE ═══ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#6F4BA8;--primary-dark:#5E418F;--primary-light:#8B63C8;
  --accent:#B77DFF;--accent-light:#CFA5FF;
  --bg:#1A0F2E;--surface:#231540;--card:#2D1B4E;--card-hover:#3A2363;
  --text:#FFFFFF;--text-secondary:rgba(255,255,255,.6);--text-muted:rgba(255,255,255,.35);
  --border:rgba(255,255,255,.08);--radius:16px;--radius-sm:12px;
  --shadow:0 8px 32px rgba(0,0,0,.4);--transition:cubic-bezier(.4,0,.2,1);
  --nav-h:72px;
}
html{font-size:16px;-webkit-tap-highlight-color:transparent}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);
  min-height:100vh;min-height:100dvh;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input{font-family:inherit;color:var(--text)}
::-webkit-scrollbar{width:0;display:none}

/* ═══ APP ═══ */
#app{position:relative;min-height:100vh;min-height:100dvh;padding-bottom:calc(var(--nav-h) + 16px)}
.page{display:none;animation:fadeUp .35s var(--transition) both}
.page.active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* ═══ BOTTOM NAV ═══ */
#bottom-nav{position:fixed;bottom:0;left:0;right:0;height:var(--nav-h);
  background:rgba(26,15,46,.92);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-around;
  padding:0 8px env(safe-area-inset-bottom,0);z-index:100}
.nav-btn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:8px 12px;
  border-radius:var(--radius-sm);transition:all .25s var(--transition);position:relative;min-width:60px}
.nav-btn .nav-icon{width:24px;height:24px;color:var(--text-muted);transition:all .25s var(--transition)}
.nav-btn .nav-icon svg{width:100%;height:100%}
.nav-btn .nav-label{font-size:11px;font-weight:500;color:var(--text-muted);transition:all .25s var(--transition)}
.nav-btn.active .nav-icon{color:var(--accent)}
.nav-btn.active .nav-label{color:var(--accent);font-weight:600}
.nav-btn.active::before{content:'';position:absolute;top:-1px;left:50%;transform:translateX(-50%);
  width:24px;height:3px;background:var(--accent);border-radius:0 0 4px 4px}

/* ═══ PAGE HEADER ═══ */
.page-header{padding:24px 20px 16px;text-align:center}
.page-header h1{font-size:22px;font-weight:800;letter-spacing:-.02em;
  background:linear-gradient(135deg,#fff,var(--accent-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.page-header p{font-size:13px;color:var(--text-secondary);margin-top:4px}

/* ═══ HOME PAGE ═══ */
.home-hero{padding:32px 20px 24px;text-align:center}
.home-logo{width:80px;height:80px;border-radius:24px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
  box-shadow:0 8px 32px rgba(111,75,168,.4);font-size:36px;
  animation:floatLogo 3s ease-in-out infinite}
@keyframes floatLogo{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.home-title{font-size:28px;font-weight:900;letter-spacing:-.03em;
  background:linear-gradient(135deg,#fff 0%,var(--accent-light) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.home-subtitle{font-size:14px;color:var(--text-secondary);margin-top:6px}

.home-cards{padding:0 16px;display:flex;flex-direction:column;gap:12px}
.home-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;display:flex;align-items:center;gap:16px;cursor:pointer;
  transition:all .25s var(--transition);position:relative;overflow:hidden}
.home-card::after{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(183,125,255,.05),transparent);
  opacity:0;transition:opacity .25s}
.home-card:hover,.home-card:active{transform:translateY(-2px);border-color:rgba(183,125,255,.2);box-shadow:var(--shadow)}
.home-card:hover::after,.home-card:active::after{opacity:1}
.home-card-icon{width:48px;height:48px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;
  background:linear-gradient(135deg,var(--primary),var(--accent))}
.home-card-info{flex:1}
.home-card-info h3{font-size:16px;font-weight:700}
.home-card-info p{font-size:12px;color:var(--text-secondary);margin-top:2px}
.home-card-arrow{color:var(--text-muted);font-size:18px;transition:transform .25s}
.home-card:hover .home-card-arrow{transform:translateX(4px);color:var(--accent)}

/* ═══ STARS GRID ═══ */
.stars-section{padding:0 16px 120px}
.section-label{font-size:13px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;
  letter-spacing:.08em;padding:0 4px;margin-bottom:12px}
.stars-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.star-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);
  padding:18px 14px;text-align:center;cursor:pointer;transition:all .25s var(--transition);
  position:relative;overflow:hidden}
.star-card::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;
  background:conic-gradient(transparent,rgba(183,125,255,.1),transparent 30%);
  opacity:0;transition:opacity .4s;animation:none}
.star-card.selected{border-color:var(--accent);background:linear-gradient(135deg,rgba(111,75,168,.3),rgba(45,27,78,.8));
  box-shadow:0 0 20px rgba(183,125,255,.15)}
.star-card.selected::before{opacity:1;animation:rotateBorder 4s linear infinite}
@keyframes rotateBorder{to{transform:rotate(360deg)}}
.star-card:active{transform:scale(.96)}
.star-card-emoji{font-size:28px;margin-bottom:6px;display:block}
.star-card-amount{font-size:22px;font-weight:800;display:block}
.star-card-price{font-size:13px;color:var(--text-secondary);margin-top:4px;display:block}
.star-card .check-mark{position:absolute;top:8px;right:8px;width:22px;height:22px;
  border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;opacity:0;transform:scale(0);transition:all .25s var(--transition)}
.star-card.selected .check-mark{opacity:1;transform:scale(1)}

/* ═══ PREMIUM PLANS ═══ */
.premium-section{padding:0 16px 120px}
.premium-features{display:flex;flex-direction:column;gap:8px;margin-bottom:20px;padding:0 4px}
.premium-feat{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-secondary)}
.premium-feat-icon{color:var(--accent);font-size:16px;flex-shrink:0}
.plan-card{background:var(--card);border:1.5px solid var(--border);border-radius:var(--radius);
  padding:18px 16px;display:flex;align-items:center;gap:14px;margin-bottom:10px;
  cursor:pointer;transition:all .25s var(--transition);position:relative;overflow:hidden}
.plan-card.selected{border-color:var(--accent);background:linear-gradient(135deg,rgba(111,75,168,.3),rgba(45,27,78,.8));
  box-shadow:0 0 20px rgba(183,125,255,.12)}
.plan-card:active{transform:scale(.98)}
.plan-radio{width:22px;height:22px;border-radius:50%;border:2px solid var(--text-muted);
  display:flex;align-items:center;justify-content:center;transition:all .25s;flex-shrink:0}
.plan-card.selected .plan-radio{border-color:var(--accent);background:var(--accent)}
.plan-card.selected .plan-radio::after{content:'✓';font-size:12px;color:#fff;font-weight:700}
.plan-info{flex:1}
.plan-label{font-size:16px;font-weight:700;display:block}
.plan-price{font-size:13px;color:var(--text-secondary);margin-top:2px;display:block}
.plan-badge{background:linear-gradient(135deg,var(--accent),var(--primary));
  padding:3px 10px;border-radius:20px;font-size:11px;font-weight:700;white-space:nowrap}

/* ═══ STICKY BOTTOM BAR ═══ */
.bottom-bar{position:fixed;bottom:var(--nav-h);left:0;right:0;
  background:rgba(26,15,46,.95);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-top:1px solid var(--border);padding:12px 16px;
  transform:translateY(100%);transition:transform .3s var(--transition);z-index:90}
.bottom-bar.visible{transform:translateY(0)}

/* ═══ CTA BUTTON ═══ */
.cta-btn{width:100%;padding:16px;border-radius:var(--radius-sm);font-size:16px;font-weight:700;
  background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;
  display:flex;align-items:center;justify-content:center;gap:8px;
  transition:all .25s var(--transition);position:relative;overflow:hidden}
.cta-btn::after{content:'';position:absolute;top:0;left:-100%;width:60%;height:100%;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);
  transition:none}
.cta-btn:hover::after{left:100%;transition:left .6s}
.cta-btn:disabled{opacity:.4;pointer-events:none}
.cta-btn svg{width:18px;height:18px}
.cta-btn.full-width{width:100%}

/* ═══ ACCOUNT PAGE ═══ */
.account-header{padding:28px 20px 20px;text-align:center}
.avatar-wrap{width:80px;height:80px;border-radius:50%;margin:0 auto 12px;
  background:linear-gradient(135deg,var(--primary),var(--accent));padding:3px;
  box-shadow:0 4px 24px rgba(111,75,168,.4)}
.avatar-wrap img{width:100%;height:100%;border-radius:50%;object-fit:cover;
  background:var(--card);display:block}
.avatar-wrap .avatar-placeholder{width:100%;height:100%;border-radius:50%;
  background:var(--card);display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:800}
.account-name{font-size:20px;font-weight:800}
.account-username{font-size:13px;color:var(--text-secondary);margin-top:2px}
.account-id{font-size:11px;color:var(--text-muted);margin-top:2px}

/* Wallet Card */
.wallet-card{margin:0 16px 20px;padding:24px 20px;border-radius:20px;
  background:linear-gradient(135deg,var(--primary-dark),var(--primary),var(--accent));
  position:relative;overflow:hidden;box-shadow:0 12px 40px rgba(111,75,168,.35)}
.wallet-card::before{content:'';position:absolute;top:-40%;right:-20%;width:60%;height:120%;
  background:radial-gradient(ellipse,rgba(255,255,255,.08),transparent 70%);pointer-events:none}
.wallet-label{font-size:12px;color:rgba(255,255,255,.7);font-weight:500;text-transform:uppercase;letter-spacing:.06em}
.wallet-balance{font-size:36px;font-weight:900;margin-top:4px;letter-spacing:-.02em}
.wallet-balance .wallet-currency{font-size:16px;font-weight:600;opacity:.7;margin-left:4px}
.topup-btn{margin-top:16px;width:100%;padding:14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.15);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.2);font-size:15px;font-weight:700;
  transition:all .25s var(--transition);display:flex;align-items:center;justify-content:center;gap:8px}
.topup-btn:hover,.topup-btn:active{background:rgba(255,255,255,.25)}

/* Account Menu */
.account-menu{padding:0 16px;display:flex;flex-direction:column;gap:2px}
.menu-section-label{font-size:11px;font-weight:600;color:var(--text-muted);text-transform:uppercase;
  letter-spacing:.08em;padding:16px 4px 8px}
.menu-item{display:flex;align-items:center;gap:14px;padding:14px 16px;
  background:var(--card);border-radius:var(--radius-sm);cursor:pointer;
  transition:all .2s var(--transition)}
.menu-item:hover{background:var(--card-hover)}
.menu-item+.menu-item{margin-top:2px}
.menu-icon{width:36px;height:36px;border-radius:10px;display:flex;align-items:center;
  justify-content:center;font-size:18px;flex-shrink:0;
  background:linear-gradient(135deg,rgba(111,75,168,.3),rgba(45,27,78,.5))}
.menu-label{flex:1;font-size:14px;font-weight:600}
.menu-value{font-size:13px;color:var(--text-secondary);font-weight:500}
.menu-arrow{color:var(--text-muted);font-size:14px}

/* ═══ MODALS ═══ */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);
  -webkit-backdrop-filter:blur(4px);z-index:200;display:flex;align-items:flex-end;
  justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s}
.modal-overlay.open{opacity:1;pointer-events:auto}
.modal-sheet{width:100%;max-width:420px;background:var(--surface);border-radius:20px 20px 0 0;
  padding:16px 20px 32px;transform:translateY(100%);transition:transform .35s var(--transition);
  max-height:90vh;overflow-y:auto}
.modal-overlay.open .modal-sheet{transform:translateY(0)}
.modal-handle{width:40px;height:4px;border-radius:2px;background:rgba(255,255,255,.15);margin:0 auto 16px}
.modal-title{font-size:20px;font-weight:800;text-align:center}
.modal-sub{font-size:13px;color:var(--text-secondary);text-align:center;margin-top:4px;margin-bottom:20px}
.modal-cancel{width:100%;text-align:center;padding:12px;font-size:14px;font-weight:600;
  color:var(--text-secondary);margin-top:8px;border-radius:var(--radius-sm);
  transition:background .2s}
.modal-cancel:hover{background:rgba(255,255,255,.05)}
.modal-section-label{font-size:12px;font-weight:600;color:var(--text-secondary);
  text-transform:uppercase;letter-spacing:.06em;margin:20px 0 10px}
.mt-16{margin-top:16px}

/* Input */
.input-group{margin-bottom:8px}
.input-label{font-size:12px;font-weight:600;color:var(--text-secondary);margin-bottom:6px;display:block}
.input-wrap{position:relative}
.premium-input{width:100%;padding:14px 60px 14px 16px;border-radius:var(--radius-sm);
  background:var(--card);border:1.5px solid var(--border);font-size:18px;font-weight:700;
  transition:border-color .25s;outline:none}
.premium-input:focus{border-color:var(--accent)}
.premium-input::placeholder{color:var(--text-muted);font-weight:400}
.input-suffix{position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:14px;color:var(--text-muted);font-weight:600}
.quick-amounts{display:flex;gap:8px;margin-top:10px}
.quick-btn{flex:1;padding:10px;border-radius:var(--radius-sm);background:var(--card);
  border:1px solid var(--border);font-size:13px;font-weight:600;transition:all .2s}
.quick-btn:hover,.quick-btn:active{border-color:var(--accent);color:var(--accent)}

/* Payment methods */
.payment-methods{display:flex;flex-direction:column;gap:8px}
.pay-method{display:flex;align-items:center;gap:12px;padding:14px 16px;
  border-radius:var(--radius-sm);background:var(--card);border:1.5px solid var(--border);
  transition:all .25s;text-align:left}
.pay-method.active{border-color:var(--accent);background:rgba(111,75,168,.15)}
.pm-icon{font-size:24px;flex-shrink:0}
.pm-info{flex:1;display:flex;flex-direction:column}
.pm-name{font-size:14px;font-weight:600}
.pm-desc{font-size:11px;color:var(--text-secondary)}
.pm-check{font-size:16px;color:var(--accent);opacity:0;transition:opacity .2s}
.pay-method.active .pm-check{opacity:1}

/* Card Display */
.card-display{margin:16px 0;padding:24px 20px;border-radius:var(--radius);
  background:linear-gradient(135deg,var(--primary-dark),var(--primary),rgba(183,125,255,.4));
  position:relative;overflow:hidden}
.card-display::before{content:'';position:absolute;top:-30%;right:-15%;width:50%;height:100%;
  background:radial-gradient(ellipse,rgba(255,255,255,.06),transparent 70%)}
.card-top{display:flex;justify-content:space-between;margin-bottom:20px}
.card-bank{font-size:12px;font-weight:600;opacity:.8}
.card-type{font-size:12px;font-weight:700;opacity:.6}
.card-number{font-size:20px;font-weight:700;letter-spacing:.12em;text-align:center}
.card-bottom{display:flex;justify-content:space-between;margin-top:20px;font-size:11px;opacity:.7}
.card-holder{font-weight:600;text-transform:uppercase}
.card-amount-label{font-weight:500}
.card-amount-label b{color:var(--accent-light);font-weight:800}

.copy-card-btn{width:100%;padding:12px;border-radius:var(--radius-sm);background:var(--card);
  border:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:8px;
  font-size:14px;font-weight:600;transition:all .2s;margin:12px 0}
.copy-card-btn:hover{border-color:var(--accent);color:var(--accent)}
.copy-card-btn svg{width:16px;height:16px}

/* Info Box */
.info-box{display:flex;gap:10px;padding:14px;border-radius:var(--radius-sm);
  background:rgba(183,125,255,.08);border:1px solid rgba(183,125,255,.15);margin:16px 0}
.info-box svg{width:20px;height:20px;flex-shrink:0;color:var(--accent)}
.info-box p{font-size:12px;color:var(--text-secondary);line-height:1.5}

/* Crypto */
.crypto-address-box{padding:16px;border-radius:var(--radius-sm);background:var(--card);
  border:1px solid var(--border);margin:16px 0;text-align:center}
.crypto-label{font-size:11px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px}
.crypto-address{font-size:14px;font-weight:600;word-break:break-all;margin-bottom:12px;color:var(--accent-light)}
.crypto-amount-box{display:flex;justify-content:space-between;align-items:center;
  padding:14px 16px;border-radius:var(--radius-sm);background:var(--card);border:1px solid var(--border)}
.crypto-usd{font-size:16px;font-weight:700;color:var(--accent)}

/* Order modal */
.order-icon{font-size:48px;text-align:center;margin-bottom:8px}
.order-detail-row{display:flex;justify-content:space-between;padding:12px 0;
  border-bottom:1px solid var(--border);font-size:14px}
.order-detail-row:last-of-type{border-bottom:none}
.accent-text{color:var(--accent);font-weight:700}

/* ═══ TOAST ═══ */
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-100px);
  padding:12px 24px;border-radius:var(--radius-sm);background:var(--card);
  border:1px solid var(--border);font-size:14px;font-weight:600;
  box-shadow:var(--shadow);z-index:999;transition:transform .35s var(--transition);white-space:nowrap}
.toast.show{transform:translateX(-50%) translateY(0)}

/* ═══ AMBIENT BG ═══ */
body::before,body::after{content:'';position:fixed;border-radius:50%;pointer-events:none;
  filter:blur(80px);opacity:.15;z-index:-1}
body::before{width:300px;height:300px;background:var(--primary);top:-100px;left:-80px}
body::after{width:250px;height:250px;background:var(--accent);bottom:10%;right:-60px}

/* ═══ RESPONSIVE ═══ */
@media(min-width:420px){
  .stars-grid{grid-template-columns:repeat(3,1fr)}
  .modal-sheet{border-radius:20px;margin-bottom:20px}
  .modal-overlay{align-items:center}
}