/* ==================== @XiaoShuoTech EXIF编辑器 - 浅色主题 ==================== */
:root {
  --bg:#f2f2f7;--card:#fff;--card2:#f5f5fa;--border:#e0e0ea;--border-light:#d5d5e0;
  --text:#1c1c2e;--text2:#5a5a72;--text3:#999aaf;--accent:#6c5ce7;--accent2:#5a4bd1;
  --green:#10b981;--red:#ef4444;--radius:14px;--radius-sm:10px;--radius-xs:7px;
  --shadow-sm:0 1px 3px rgba(0,0,0,0.06);--shadow:0 4px 16px rgba(0,0,0,0.08);--shadow-lg:0 8px 32px rgba(0,0,0,0.12);
  --transition:0.22s cubic-bezier(0.4,0,0.2,1);
  --topbar-h:54px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;-webkit-tap-highlight-color:transparent}

/* ===== TOP BAR ===== */
.topbar{position:sticky;top:0;z-index:100;height:var(--topbar-h);background:rgba(255,255,255,0.82);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:0 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.topbar-left{display:flex;align-items:center;gap:10px;min-width:0}
.topbar-avatar{width:30px;height:30px;border-radius:7px;object-fit:cover;flex-shrink:0}
.topbar-info{display:flex;flex-direction:column;min-width:0}
.topbar-title{font-size:14px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-sub{font-size:10px;color:var(--text3)}
.topbar-reset{padding:6px 14px;border-radius:14px;border:1px solid var(--border);background:var(--card);color:var(--text2);cursor:pointer;font-size:12px;white-space:nowrap;transition:all var(--transition);flex-shrink:0}
.topbar-reset:hover{border-color:var(--red);color:var(--red);background:#fef2f2}
.topbar-reset:disabled{opacity:0.35;cursor:not-allowed}

/* ===== CONTAINER ===== */
.container{max-width:680px;margin:0 auto;padding:20px 16px 100px}

/* ===== UPLOAD ===== */
.upload-section{margin-bottom:20px;transition:all 0.35s ease}
.upload-section.hidden{display:none}
.upload-area{background:var(--card);border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:all var(--transition);box-shadow:var(--shadow-sm)}
.upload-area:hover{border-color:var(--accent);background:var(--card2);transform:translateY(-1px);box-shadow:var(--shadow)}
.upload-area.drag-over{border-color:var(--accent);border-style:solid;background:#f8f7ff}
.upload-icon{font-size:40px;margin-bottom:10px;display:block}
.upload-title{font-size:15px;font-weight:600;margin-bottom:4px;color:var(--text)}
.upload-hint{font-size:12px;color:var(--text2)}
.upload-area input[type="file"]{display:none}

/* ===== FILES ===== */
.files-bar{display:none;align-items:center;justify-content:space-between;padding:12px 16px;margin-bottom:14px;background:var(--card);border-radius:var(--radius-sm);border:1px solid var(--border);box-shadow:var(--shadow-sm);animation:fadeIn 0.3s ease}
.files-bar.active{display:flex}
.files-bar .count{font-size:13px;color:var(--text2)}
.files-bar .count strong{color:var(--accent)}
.files-bar .add-btn{padding:5px 12px;border-radius:10px;border:1px solid var(--border);background:var(--card2);color:var(--accent);cursor:pointer;font-size:11px;transition:all var(--transition)}
.files-bar .add-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.files-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:8px;margin-bottom:14px}
.file-card{position:relative;border-radius:var(--radius-sm);overflow:hidden;background:var(--card);aspect-ratio:1;border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:all var(--transition);animation:fadeIn 0.3s ease}
.file-card:hover{border-color:var(--accent);box-shadow:0 4px 16px rgba(108,92,231,0.15)}
.file-card img{width:100%;height:100%;object-fit:cover}
.file-card-rm{position:absolute;top:4px;right:4px;width:20px;height:20px;border-radius:50%;background:rgba(0,0,0,0.55);color:#fff;border:none;cursor:pointer;font-size:12px;line-height:20px;text-align:center;opacity:0;transition:all var(--transition)}
.file-card:hover .file-card-rm{opacity:1}
.file-card-rm:hover{background:var(--red)}

/* ===== BRAND TABS ===== */
.presets-section,.form-sections,.action-bar{display:none}
.presets-section.active,.form-sections.active,.action-bar.active{display:block}
.presets-section{margin-bottom:14px}
.brand-tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.brand-tab{padding:6px 14px;border-radius:14px;border:1px solid var(--border);background:var(--card);color:var(--text2);cursor:pointer;font-size:12px;font-weight:500;transition:all var(--transition);white-space:nowrap}
.brand-tab:hover{border-color:var(--accent);color:var(--accent)}
.brand-tab.active{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600;box-shadow:0 2px 10px rgba(108,92,231,0.3)}
.preset-grid{display:flex;gap:6px;flex-wrap:wrap}
.preset-card{padding:7px 14px;border-radius:16px;border:1px solid var(--border);background:var(--card);color:var(--text2);cursor:pointer;font-size:11.5px;transition:all var(--transition);white-space:nowrap}
.preset-card:hover{border-color:var(--accent);color:var(--accent)}
.preset-card.selected{background:rgba(108,92,231,0.08);border-color:var(--accent);color:var(--accent);font-weight:600}

/* ===== FORM CARDS ===== */
.form-sections{animation:fadeSlideIn 0.4s ease}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-sm)}
.card-header{display:flex;align-items:center;justify-content:space-between;padding:13px 16px;cursor:pointer;user-select:none}
.card-header h3{font-size:13px;font-weight:600}
.arrow{font-size:10px;transition:transform 0.35s ease;color:var(--text3);width:20px;height:20px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:var(--card2)}
.card.expanded .arrow{transform:rotate(180deg);background:rgba(108,92,231,0.1);color:var(--accent)}
.card-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows 0.35s ease}
.card-body>div{overflow:hidden}
.card.expanded .card-body>div{padding:2px 16px 16px}
.card.expanded .card-body{grid-template-rows:1fr}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.form-grid.col-1{grid-template-columns:1fr}

/* Resolution chips */
.res-chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}
.res-chip{padding:7px 13px;border-radius:var(--radius-xs);border:1px solid var(--border);background:var(--bg);color:var(--text2);font-size:11px;font-weight:500;cursor:pointer;transition:all .2s ease;white-space:nowrap;letter-spacing:0.3px}
.res-chip:hover{border-color:var(--accent);color:var(--accent);background:#fff}
.res-chip.active{background:var(--accent);color:#fff;border-color:var(--accent);font-weight:600}
.form-group{display:flex;flex-direction:column;gap:4px}
.form-group label{font-size:10.5px;color:var(--text2);font-weight:600;text-transform:uppercase;letter-spacing:0.5px}
.form-group input,.form-group select{padding:10px 12px;border-radius:var(--radius-xs);border:1px solid var(--border);background:var(--card2);color:var(--text);font-size:13px;outline:none;transition:all var(--transition);width:100%;font-family:inherit}
.form-group input:focus,.form-group select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(108,92,231,0.1);background:var(--card)}
.form-group input::placeholder{color:var(--text3)}
.form-group select{appearance:none;cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23999aaf' stroke-width='2.5'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:32px}

/* ===== BOTTOM ACTION BAR ===== */
.action-bar{position:fixed;bottom:0;left:0;right:0;z-index:100;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,0.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid var(--border);animation:fadeSlideIn 0.4s ease}
.action-bar.active{display:block}
.btn{width:100%;padding:14px;border-radius:var(--radius);border:none;cursor:pointer;font-size:15px;font-weight:700;transition:all var(--transition);font-family:inherit;text-align:center}
.btn:active{transform:scale(0.97)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;box-shadow:0 4px 16px rgba(108,92,231,0.25)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 24px rgba(108,92,231,0.35)}
.btn-primary:disabled{opacity:0.4;cursor:not-allowed;transform:none}

/* ===== RESULT MODAL ===== */
.result-modal{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,0.45);display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity 0.3s ease;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.result-modal.active{opacity:1;pointer-events:all}
.result-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);width:100%;max-width:440px;max-height:90vh;overflow-y:auto;-webkit-overflow-scrolling:touch;box-shadow:var(--shadow-lg);animation:modalIn 0.3s cubic-bezier(0.34,1.56,0.64,1)}
.result-box::-webkit-scrollbar{width:3px}
.result-box::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}
.result-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--card);z-index:1}
.result-head h3{font-size:16px;font-weight:700}
.result-close{width:30px;height:30px;border-radius:50%;border:1px solid var(--border);background:var(--card2);color:var(--text2);cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}
.result-close:hover{color:var(--text);border-color:var(--text3);background:var(--border)}
.result-preview{width:100%;max-height:300px;object-fit:contain;display:block;background:#f0f0f3;cursor:pointer}
.result-preview:hover{opacity:0.9}
.result-info{padding:14px 18px}
.result-info-table{display:grid;grid-template-columns:auto 1fr;gap:4px 14px;font-size:12px}
.result-info-table span:nth-child(odd){color:var(--text3)}
.result-info-table span:nth-child(even){color:var(--text2)}
.result-info-table .lens{color:var(--accent)!important;font-weight:600}
.result-foot{padding:10px 18px 18px;display:flex;gap:10px}
.result-dl-btn{flex:1;padding:12px;border-radius:var(--radius-sm);border:none;cursor:pointer;font-size:14px;font-weight:700;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#fff;transition:all var(--transition)}
.result-dl-btn:hover{transform:translateY(-1px)}
.result-dl-btn:disabled{opacity:0.4;cursor:default;transform:none}
.result-next-btn{padding:12px 16px;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--card2);color:var(--text2);cursor:pointer;font-size:14px;transition:all var(--transition);white-space:nowrap}
.result-next-btn:hover{border-color:var(--accent);color:var(--accent)}

/* ===== LOADING ===== */
.loading-mask{position:fixed;inset:0;z-index:300;background:rgba(242,242,247,0.75);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:14px;opacity:0;pointer-events:none;transition:opacity 0.3s ease;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}
.loading-mask.active{opacity:1;pointer-events:all}
.spinner{width:38px;height:38px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin 0.7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-txt{font-size:14px;color:var(--text2);font-weight:500}

/* ===== TOAST ===== */
.toast{position:fixed;top:70px;left:50%;transform:translateX(-50%) translateY(-120px);padding:10px 20px;border-radius:20px;background:var(--card);border:1px solid var(--border);color:var(--text);font-size:13px;font-weight:500;z-index:400;transition:transform 0.4s cubic-bezier(0.34,1.56,0.64,1);pointer-events:none;white-space:nowrap;box-shadow:var(--shadow)}
.toast.show{transform:translateX(-50%) translateY(0)}
.toast.success{border-color:rgba(16,185,129,0.4);color:var(--green)}
.toast.error{border-color:rgba(239,68,68,0.4);color:var(--red)}

/* ===== PREVIEW MODAL ===== */
.preview-modal{position:fixed;inset:0;z-index:250;background:rgba(0,0,0,0.92);display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;pointer-events:none;transition:opacity 0.3s ease}
.preview-modal.active{opacity:1;pointer-events:all}
.preview-close{position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;border:1.5px solid rgba(255,255,255,0.3);background:rgba(0,0,0,0.4);color:#fff;cursor:pointer;font-size:18px;z-index:1;display:flex;align-items:center;justify-content:center}
.preview-img{max-width:94vw;max-height:90vh;object-fit:contain;border-radius:6px;box-shadow:0 20px 60px rgba(0,0,0,0.5)}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes fadeSlideIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes modalIn{from{opacity:0;transform:scale(0.92) translateY(16px)}to{opacity:1;transform:scale(1) translateY(0)}}

/* ===== RESPONSIVE ===== */
@media(max-width:500px){
  .container{padding:12px 10px 90px}
  .form-grid{grid-template-columns:1fr}
  .topbar{padding:0 10px}
  .topbar-title{font-size:13px}
  .upload-area{padding:36px 16px}
  
  /* Result modal - fullscreen on mobile */
  .result-modal{padding:0;align-items:flex-end}
  .result-box{max-width:100%;max-height:92vh;border-radius:var(--radius) var(--radius) 0 0;animation:modalInMobile 0.35s cubic-bezier(0.32,0.72,0,0.96)}
  .result-preview{max-height:45vh;border-radius:0}
  .result-info{padding:12px 14px}
  .result-info-table{font-size:13px;gap:3px 12px}
  .result-foot{padding:8px 14px 18px;flex-wrap:wrap}
  .result-next-btn{flex:1;text-align:center}
  .result-dl-btn{font-size:15px;padding:14px}
  
  /* Preview modal */
  .preview-modal{padding:0}
  .preview-close{top:10px;right:10px}
  
  /* Brand tabs - horizontal scroll */
  .brand-tabs{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch;gap:6px;padding-bottom:4px}
  .brand-tab{flex-shrink:0;padding:8px 14px;font-size:13px}
  
  /* Preset grid */
  .preset-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  
  /* File cards */
  .files-grid{grid-template-columns:repeat(3,1fr);gap:8px}
}

@keyframes modalInMobile{from{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}