nav{padding:0 1.5rem;}
.nav-back{display:flex;align-items:center;gap:6px;font-size:var(--fs-small);color:var(--muted);cursor:pointer;text-decoration:none;}
.nav-back:hover{color:var(--brand);}

.page{max-width:900px;}
.txn-header{background:#fff;border:1px solid var(--border);border-radius:12px;padding:1.25rem;margin-bottom:1rem;display:grid;grid-template-columns:1fr auto;gap:1rem;align-items:center;}
.txn-id{font-size:var(--fs-caption);color:var(--muted);font-weight:500;margin-bottom:4px;}
.txn-pair{font-size:var(--fs-h1);font-weight:800;letter-spacing:-0.3px;color:var(--text);}
.txn-sub{font-size:var(--fs-small);color:var(--muted);margin-top:4px;}
.txn-status-badge{padding:8px 16px;border-radius:8px;font-size:var(--fs-small);font-weight:700;text-align:center;}
.sb-active{background:var(--brand-light);color:var(--brand);}
.sb-done{background:var(--success-light);color:var(--success);}
.sb-dispute{background:var(--danger-light);color:var(--danger);}
.sb-expired{background:var(--border);color:var(--muted);}

.timer-bar-wrap{background:#fff;border:1px solid var(--border);border-radius:12px;padding:1rem 1.25rem;margin-bottom:1rem;}
.timer-bar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;}
.timer-label{font-size:var(--fs-caption);font-weight:600;color:var(--muted);}
.timer-val{font-size:var(--fs-h3);font-weight:800;color:var(--warning);font-variant-numeric:tabular-nums;}
.timer-track{height:8px;background:var(--bg);border-radius:4px;overflow:hidden;}
.timer-fill{height:100%;border-radius:4px;background:var(--warning);transition:width 1s linear;}
.timer-note{font-size:var(--fs-caption);color:var(--muted);margin-top:6px;}

.layout{display:grid;grid-template-columns:1fr 340px;gap:1rem;}
.card{overflow:hidden;margin-bottom:1rem;}
.card-hdr{display:flex;align-items:center;justify-content:space-between;padding:0.9rem 1.25rem;border-bottom:1px solid var(--border);}
.card-title{font-size:var(--fs-small);font-weight:700;color:var(--text);}
.card-body{padding:1.25rem;}

.timeline{display:flex;flex-direction:column;gap:0;}
.tl-item{display:flex;gap:14px;padding:10px 0;}
.tl-left{display:flex;flex-direction:column;align-items:center;width:28px;flex-shrink:0;}
.tl-circle{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:var(--fs-caption);font-weight:700;flex-shrink:0;}
.tc-done{background:var(--success);color:#fff;}
.tc-active{background:var(--brand);color:#fff;animation:ring 2s infinite;}
@keyframes ring{0%,100%{box-shadow:0 0 0 0 rgba(27,79,216,0.4);}50%{box-shadow:0 0 0 6px rgba(27,79,216,0);}}
.tc-todo{background:var(--border);color:var(--muted);}
.tc-error{background:var(--danger);color:#fff;}
.tl-line{width:2px;flex:1;background:var(--border);margin:4px auto;}
.tl-line.done-line{background:var(--success);}
.tl-content{flex:1;padding-top:4px;padding-bottom:8px;}
.tl-title{font-size:var(--fs-small);font-weight:700;color:var(--text);}
.tl-title.active-title{color:var(--brand);}
.tl-title.done-title{color:var(--muted);}
.tl-desc{font-size:var(--fs-caption);color:var(--muted);margin-top:3px;line-height:1.8;}
.tl-time{font-size:var(--fs-caption);color:var(--muted);margin-top:4px;font-weight:500;}

.payment-details{background:var(--warning-light);border:1px solid #EF9F27;border-radius:10px;padding:1rem;margin-bottom:1rem;}
.pd-title{font-size:var(--fs-small);font-weight:700;color:var(--warning);margin-bottom:8px;display:flex;align-items:center;gap:6px;}
.pd-row{display:flex;justify-content:space-between;padding:5px 0;font-size:var(--fs-small);border-bottom:1px solid rgba(239,159,39,0.2);}
.pd-row:last-child{border-bottom:none;}
.pd-label{color:var(--warning);}
.pd-val{font-weight:700;color:var(--text);}
.pd-val.highlight{color:var(--danger);font-size:var(--fs-body);}
.copy-btn{font-size:var(--fs-caption);color:var(--brand);background:var(--brand-light);border:none;padding:2px 8px;border-radius:4px;cursor:pointer;font-weight:600;}

.upload-area{border:2px dashed var(--border);border-radius:10px;padding:1.5rem;text-align:center;cursor:pointer;transition:all 0.2s;background:var(--bg);position:relative;}
.upload-area:hover{border-color:var(--brand);background:var(--brand-light);}
.upload-area.has-file{border-color:var(--success);background:var(--success-light);border-style:solid;}
.upload-area input{position:absolute;inset:0;opacity:0;cursor:pointer;}
.ua-icon{font-size:28px;margin-bottom:6px;}
.ua-title{font-size:var(--fs-small);font-weight:700;color:var(--text);}
.ua-sub{font-size:var(--fs-caption);color:var(--muted);margin-top:3px;}
.ua-file-name{font-size:var(--fs-small);font-weight:700;color:var(--success);margin-top:6px;}

.btn-submit{width:100%;padding:12px;background:var(--brand);border:none;border-radius:9px;font-size:var(--fs-body);font-weight:700;color:#fff;cursor:pointer;transition:all 0.15s;margin-top:10px;}
.btn-submit:hover{background:var(--brand-dark);}
.btn-submit:disabled{opacity:0.5;cursor:not-allowed;}

.summary{background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;margin-bottom:1rem;}
.summary-hdr{background:var(--brand);padding:1rem;color:#fff;}
.summary-hdr-title{font-size:13px;font-weight:700;}
.summary-hdr-sub{font-size:11px;opacity:0.8;margin-top:2px;}
.summary-body{padding:1rem;}
.sum-row{display:flex;justify-content:space-between;align-items:center;padding:6px 0;border-bottom:1px solid var(--border);font-size:var(--fs-small);}
.sum-row:last-of-type{border-bottom:none;}
.sum-lbl{color:var(--muted);}
.sum-val{font-weight:600;color:var(--text);}
.sum-total{background:var(--brand-light);border-radius:8px;padding:10px;margin-top:8px;display:flex;justify-content:space-between;align-items:center;}
.sum-total-lbl{font-size:var(--fs-caption);font-weight:600;color:var(--brand);}
.sum-total-val{font-size:var(--fs-h2);font-weight:800;color:var(--brand);}

.guarantee{background:var(--success-light);border:1px solid var(--success);border-radius:8px;padding:10px;margin-top:8px;}
.g-title{font-size:var(--fs-caption);font-weight:700;color:var(--success);margin-bottom:4px;}
.g-item{font-size:var(--fs-caption);color:var(--success);display:flex;align-items:center;gap:5px;margin-top:3px;}

.chat-card{background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;}
.chat-hdr{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;padding:0.9rem 1rem;border-bottom:1px solid var(--border);flex-wrap:wrap;}
.chat-hdr-text{flex:1;min-width:200px;}
.chat-hdr-title{display:block;font-size:var(--fs-small);font-weight:700;color:var(--text);margin-bottom:6px;}
.chat-hdr-sub{margin:0;font-size:var(--fs-caption);color:var(--muted);line-height:1.65;}
.chat-hdr-sub strong{color:var(--text);font-weight:700;}
.chat-online{display:flex;align-items:center;gap:4px;font-size:var(--fs-caption);font-weight:600;color:var(--success);}
.chat-online-dot{width:7px;height:7px;border-radius:50%;background:var(--success);}
.chat-messages{height:200px;overflow-y:auto;padding:1rem;display:flex;flex-direction:column;gap:8px;transition:box-shadow 0.35s ease;}
.chat-messages.chat-new-flash{box-shadow:inset 0 0 0 2px var(--brand);}
.chat-msg{max-width:85%;padding:8px 12px;border-radius:10px;font-size:var(--fs-caption);line-height:1.8;}
.msg-agent{background:var(--bg);border:1px solid var(--border);align-self:flex-start;border-radius:2px 10px 10px 10px;}
.msg-user{background:var(--brand);color:#fff;align-self:flex-end;border-radius:10px 2px 10px 10px;}
.msg-time{font-size:var(--fs-caption);opacity:0.6;margin-top:3px;}
.chat-input-row{display:flex;gap:6px;padding:0.75rem;border-top:1px solid var(--border);}
.chat-inp{flex:1;padding:8px 10px;border:1px solid var(--border);border-radius:7px;font-size:var(--fs-small);color:var(--text);outline:none;}
.chat-inp:focus{border-color:var(--brand);}
.chat-send{padding:8px 14px;background:var(--brand);border:none;border-radius:7px;color:#fff;font-size:var(--fs-small);font-weight:600;cursor:pointer;}

.dispute-section{background:var(--danger-light);border:1px solid #E24B4A;border-radius:10px;padding:1rem;margin-top:1rem;}
.dispute-title{font-size:var(--fs-small);font-weight:700;color:var(--danger);margin-bottom:8px;}
.btn-dispute{width:100%;padding:10px;background:transparent;border:1px solid var(--danger);border-radius:8px;font-size:var(--fs-small);font-weight:700;color:var(--danger);cursor:pointer;transition:all 0.15s;margin-top:6px;}
.btn-dispute:hover{background:var(--danger);color:#fff;}

.modal-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,0.45);z-index:500;align-items:center;justify-content:center;}
.modal-overlay.open{display:flex;}
.modal{background:#fff;border-radius:14px;padding:1.5rem;width:420px;max-width:95vw;}
.modal-title{font-size:var(--fs-h3);font-weight:800;margin-bottom:4px;letter-spacing:-0.2px;}
.modal-sub{font-size:var(--fs-small);color:var(--muted);margin-bottom:1rem;}
.modal-inp{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:var(--fs-small);color:var(--text);outline:none;margin-bottom:8px;}
.modal-inp:focus{border-color:var(--brand);}
.modal-ta{height:80px;resize:vertical;}
.modal-btns{display:flex;gap:8px;margin-top:10px;}
.modal-cancel{flex:1;padding:10px;border:1px solid var(--border);border-radius:8px;background:#fff;font-size:var(--fs-small);font-weight:600;color:var(--muted);cursor:pointer;}
.modal-submit{flex:1;padding:10px;background:var(--danger);border:none;border-radius:8px;font-size:var(--fs-small);font-weight:700;color:#fff;cursor:pointer;}

@media (max-width: 1024px){
  .layout{grid-template-columns:1fr}
}

@media (max-width: 680px){
  .txn-header{grid-template-columns:1fr}
  .timer-bar-header{flex-direction:column;align-items:flex-start;gap:6px}
  .modal{padding:1rem}
}