:root { --bg: #f2f2f7; --card: #fff; --card2: #f5f5f7; --border: rgba(0,0,0,0.08); --cyan: #007aff; --green: #34c759; --red: #ff3b30; --text1: #1c1c1e; --text2: #8e8e93; --text3: #aeaeb2; --sbg: rgba(0,0,0,0.05); }
[data-theme="dark"] { --bg: #0a0e14; --card: #12161e; --card2: #1a1e28; --border: rgba(255,255,255,0.08); --cyan: #00e5ff; --green: #00ff88; --red: #ff4757; --text1: #fff; --text2: #8b949e; --text3: #6e7681; --sbg: rgba(255,255,255,0.04); }
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text1);min-height:100vh;min-height:100dvh;display:flex;align-items:flex-start;justify-content:center;padding:12px;padding-bottom:calc(12px + env(safe-area-inset-bottom))}
.card{position:relative;width:100%;max-width:420px;background:var(--card);border:1px solid var(--border);border-radius:18px;padding:18px;padding-bottom:calc(18px + env(safe-area-inset-bottom));box-shadow:0 2px 12px rgba(0,0,0,0.06)}
.theme-bar{display:flex;align-items:center;gap:6px;margin-bottom:12px}
.lang-btn{position:absolute;top:16px;right:16px;padding:6px 10px;border:1px solid var(--border);border-radius:8px;background:var(--card2);color:var(--text2);font-size:.7rem;cursor:pointer;z-index:5;display:flex;align-items:center;gap:4px}
.lang-dropdown{display:none;position:absolute;top:44px;right:16px;background:var(--card);border:1px solid var(--border);border-radius:10px;box-shadow:0 4px 16px rgba(0,0,0,.12);z-index:10;max-height:260px;overflow-y:auto;min-width:110px}
.lang-dropdown.show{display:block}
.lang-dropdown div{padding:9px 14px;font-size:.75rem;color:var(--text1);cursor:pointer;transition:background .15s}
.lang-dropdown div:hover{background:var(--sbg)}
.theme-bar span{font-size:.72rem;color:var(--text3)}
.theme-switch{position:relative;width:56px;height:30px;background:var(--card2);border:1px solid var(--border);border-radius:15px;cursor:pointer;transition:all .3s;overflow:hidden}
.theme-switch.knob{background:var(--cyan)}
.theme-switch::after{content:'';position:absolute;top:3px;left:3px;width:22px;height:22px;background:var(--cyan);border-radius:50%;transition:all .3s}
.theme-switch.knob::after{left:29px;background:#fff}
.hdr{text-align:center;margin-bottom:14px}
.hdr h4{font-size:1.1rem;font-weight:700;color:var(--text1)}
.form-group{margin-bottom:12px}
.form-label{display:block;font-size:.72rem;font-weight:600;color:var(--text2);margin-bottom:5px;text-transform:uppercase;letter-spacing:.4px}
.input-box{width:100%;padding:11px 13px;background:var(--card2);border:1px solid var(--border);border-radius:10px;color:var(--text1);font-size:.9rem;outline:none;-webkit-appearance:none;font-family:inherit;transition:border .2s}
.input-box:focus{border-color:var(--cyan)}.input-box::placeholder{color:var(--text3)}
.xfer-row{display:flex;gap:10px;align-items:stretch}
.stepper{display:flex;align-items:center;background:var(--card2);border:1px solid var(--border);border-radius:12px;overflow:hidden}
.stepper button{width:40px;height:40px;border:none;background:transparent;color:var(--cyan);font-size:1.2rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s}
.stepper button:hover{background:var(--sbg)}
.stepper input{width:44px;height:40px;border:none;border-left:1px solid var(--border);border-right:1px solid var(--border);background:transparent;color:var(--text1);text-align:center;font-size:1rem;font-weight:700;-webkit-appearance:none}
.energy-display{flex:1;padding:0 14px;background:var(--sbg);border:1px solid var(--border);border-radius:12px;font-size:.8rem;font-weight:600;display:flex;align-items:center;justify-content:center;gap:6px;color:var(--cyan)}
.energy-display span{color:var(--green);font-size:.9rem;font-weight:700}
.quick-row{display:flex;gap:6px;margin-top:10px}
.quick{flex:1;padding:10px 0;border:1px solid var(--border);border-radius:10px;background:var(--card);color:var(--text2);font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s;text-align:center}
.quick:hover{border-color:var(--cyan);color:var(--cyan)}
.quick.on{border-color:var(--cyan);background:var(--sbg);color:var(--cyan)}
.pblock{border-top:1px solid var(--border);padding-top:14px;margin-bottom:12px}
.pblock .trx{font-size:1.5rem;font-weight:800;color:var(--green)}
.pblock .row1{display:flex;justify-content:space-between;align-items:flex-start}
.pblock .row1 .l{font-size:.85rem;color:var(--text2)}.pblock .row1 .r{text-align:right}
.pblock .row2{display:flex;justify-content:space-between;font-size:.7rem;color:var(--text3);margin-top:2px}
.pblock .row2 .burn{text-decoration:line-through}.pblock .row2 .save{color:var(--green)}
.pay-box{background:var(--card2);border:1px solid var(--border);border-radius:14px;padding:18px;margin-bottom:14px;text-align:center}
.pay-box .pay-label{font-size:.72rem;color:var(--text3);margin-bottom:12px}
.pay-box .addr-row{background:var(--card);border:1px dashed var(--border);border-radius:10px;padding:12px;margin-bottom:10px}
.pay-box .addr-text{font-family:monospace;font-size:.78rem;color:var(--cyan);word-break:break-all;text-align:center;line-height:1.4}
.pay-box .copy-btn{display:flex;align-items:center;justify-content:center;gap:6px;width:100%;padding:10px;border:1px solid var(--cyan);border-radius:10px;background:var(--card);color:var(--cyan);font-size:.8rem;font-weight:600;cursor:pointer;transition:all .2s}
.pay-box .copy-btn:active{background:var(--cyan);color:#fff}
.btn{display:block;width:100%;padding:13px;background:var(--cyan);color:#fff;font-size:.95rem;font-weight:700;border:none;border-radius:12px;cursor:pointer;-webkit-appearance:none;transition:all .2s}
.btn:active{transform:scale(.98);opacity:.9}.btn:disabled{opacity:.4}
.alert{padding:10px 13px;border-radius:10px;font-size:.78rem;margin-bottom:10px}
.alert-err{background:rgba(255,59,48,.08);color:var(--red);border:1px solid rgba(255,59,48,.2)}
.spinner{display:inline-block;width:15px;height:15px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .5s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes bounce{from{transform:translateX(0)}to{transform:translateX(4px)}}
@media(max-width:768px){
    .card{max-width:100%;min-height:100vh;min-height:100dvh;border-radius:0;padding-bottom:calc(18px + env(safe-area-inset-bottom))}
    body{padding:0;align-items:flex-start;padding-bottom:env(safe-area-inset-bottom)}
    .input-box{font-size:16px;padding:12px}
    .btn{padding:14px;font-size:1rem}
}
@media(max-width:360px){
    .card{padding:14px}
    .quick{font-size:.72rem;padding:8px 0}
    .stepper button{width:36px;height:36px}
    .stepper input{width:40px;height:36px}
}