/* ═══ CSS RESET & DESIGN TOKENS ═══════════════════════════════════════════ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --c-blue:       #274c77;
  --c-blue-dk:    #1a3555;
  --c-blue-md:    #3d6fa5;
  --c-blue-lt:    #e8f0fb;
  --c-blue-xt:    #f0f5fd;
  --c-green:      #16a34a;
  --c-green-dk:   #15803d;
  --c-green-lt:   #dcfce7;
  --c-red:        #dc2626;
  --c-red-lt:     #fee2e2;
  --c-amber:      #d97706;
  --c-amber-lt:   #fef3c7;
  --c-orange:     #ea580c;
  --c-orange-lt:  #ffedd5;
  --c-white:      #ffffff;
  --c-bg:         #eef2f7;
  --c-surf:       #ffffff;
  --c-surf2:      #f8fafc;
  --c-border:     #dde3ed;
  --c-border2:    #c8d3e4;
  --c-txt:        #1e293b;
  --c-muted:      #64748b;
  --c-faint:      #94a3b8;
  --sh-sm: 0 1px 4px rgba(0,0,0,.07);
  --sh-md: 0 4px 18px rgba(0,0,0,.09);
  --sh-lg: 0 10px 40px rgba(0,0,0,.11);
  --r1:4px; --r2:8px; --r3:14px; --r4:20px;
  --ease:.18s cubic-bezier(.4,0,.2,1);
  --font:'Inter',system-ui,-apple-system,sans-serif;
}

/* ═══ PAGE SHELL ══════════════════════════════════════════════════════════ */
body{font-family:var(--font);background:var(--c-bg);color:var(--c-txt)}
.pf-wrap{max-width:1280px;margin:0 auto;padding:22px 16px 56px}
.pf-ad{margin-bottom:22px;min-height:90px}

/* Two-column layout */
.pf-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:22px;align-items:start}
@media(max-width:1060px){.pf-layout{grid-template-columns:1fr}.pf-aside{order:99}}

/* ═══ CARD ════════════════════════════════════════════════════════════════ */
.card{background:var(--c-surf);border-radius:var(--r4);box-shadow:var(--sh-md);padding:28px}
.card+.card{margin-top:20px}
@media(max-width:600px){.card{padding:18px 16px;border-radius:var(--r3)}}

/* ═══ TOOL HEADER / HERO ═════════════════════════════════════════════════ */
.tool-hero{
  background:linear-gradient(135deg,var(--c-blue) 0%,#1e4080 50%,#15305e 100%);
  border-radius:var(--r4);padding:34px 34px 30px;color:#fff;margin-bottom:20px;
  position:relative;overflow:hidden;
}
.tool-hero::before{
  content:'';position:absolute;top:-50px;right:-30px;width:260px;height:260px;
  border-radius:50%;background:rgba(255,255,255,.04);
}
.tool-hero::after{
  content:'';position:absolute;bottom:-70px;right:100px;width:180px;height:180px;
  border-radius:50%;background:rgba(255,255,255,.03);
}
.tool-hero h1{font-size:clamp(1.5rem,3.5vw,2.1rem);font-weight:800;line-height:1.18;position:relative;z-index:1}
.tool-hero p{margin-top:10px;font-size:.95rem;opacity:.84;line-height:1.6;position:relative;z-index:1;max-width:580px}
.badge-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;position:relative;z-index:1}
.badge{
  display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border-radius:99px;
  font-size:.74rem;font-weight:700;background:rgba(255,255,255,.14);color:#fff;
  border:1px solid rgba(255,255,255,.22);
}
.badge svg{width:13px;height:13px}
@media(max-width:600px){.tool-hero{padding:24px 20px 22px}}

/* ═══ UPLOAD ZONE ═════════════════════════════════════════════════════════ */
.upload-zone{
  position:relative;background:var(--c-blue-xt);border:2.5px dashed var(--c-blue-md);
  border-radius:var(--r3);cursor:pointer;transition:var(--ease);overflow:hidden;
}
.upload-zone:hover,.upload-zone.drag-on{
  border-color:var(--c-blue);background:var(--c-blue-lt);
  box-shadow:0 0 0 4px rgba(39,76,119,.08);
}
.upload-zone input[type=file]{
  position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%;z-index:2;
}
.upload-inner{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;padding:40px 24px;pointer-events:none;gap:11px;
}
.upload-icon-wrap{
  width:68px;height:68px;border-radius:50%;background:var(--c-blue);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 18px rgba(39,76,119,.3);margin-bottom:4px;
}
.upload-icon-wrap svg{width:30px;height:30px;color:#fff}
.upload-title{font-size:1.05rem;font-weight:800;color:var(--c-txt)}
.upload-sub{font-size:.84rem;color:var(--c-muted)}
.upload-pill{
  display:inline-flex;align-items:center;gap:5px;padding:5px 14px;border-radius:99px;
  font-size:.74rem;font-weight:700;background:var(--c-blue);color:#fff;margin-top:3px;
}

/* File strip */
.file-strip{
  display:none;align-items:center;gap:10px;
  background:var(--c-blue-lt);border:1.5px solid var(--c-blue-md);
  border-radius:var(--r2);padding:12px 16px;margin-top:14px;
  font-size:.85rem;font-weight:600;color:var(--c-blue);flex-wrap:wrap;
}
.file-strip.show{display:flex}
.file-strip svg{width:19px;height:19px;flex-shrink:0}
.file-strip .fs-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-strip .fs-size{opacity:.7;font-weight:500;white-space:nowrap}
.btn-strip-rm{
  background:none;border:1.5px solid currentColor;border-radius:var(--r1);cursor:pointer;
  padding:4px 10px;font-size:.74rem;font-weight:700;color:inherit;transition:var(--ease);
  font-family:var(--font);white-space:nowrap;
}
.btn-strip-rm:hover{background:var(--c-blue);color:#fff;border-color:var(--c-blue)}

/* ═══ META BOX ════════════════════════════════════════════════════════════ */
.meta-box{
  display:none;margin-top:16px;background:var(--c-surf2);border:1px solid var(--c-border);
  border-radius:var(--r2);padding:16px 18px;
}
.meta-box.show{display:block}
.meta-box h4{
  font-size:.74rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;
  color:var(--c-faint);margin-bottom:11px;
}
.meta-grid{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.82rem}
.mk{color:var(--c-muted);white-space:nowrap}
.mv{color:var(--c-txt);font-weight:600;word-break:break-all}

/* ═══ FORM FIELDS ═════════════════════════════════════════════════════════ */
.field{margin-top:20px}
.field-label{
  display:flex;align-items:center;gap:7px;flex-wrap:wrap;
  font-size:.85rem;font-weight:700;color:var(--c-txt);margin-bottom:8px;
}
.field-label .opt-tag{
  font-size:.7rem;font-weight:600;padding:3px 9px;border-radius:99px;
  background:var(--c-surf2);border:1px solid var(--c-border);color:var(--c-muted);
}
.field-hint{font-size:.78rem;color:var(--c-muted);margin-top:6px;line-height:1.5}

.input-group{display:flex;gap:8px}
.input-group input{flex:1;min-width:0}

input[type=password],input[type=text]{
  display:block;width:100%;padding:11px 16px;
  border:1.5px solid var(--c-border);border-radius:var(--r2);
  font-size:.93rem;font-family:var(--font);color:var(--c-txt);
  background:var(--c-surf);outline:none;transition:var(--ease);
}
input:focus{border-color:var(--c-blue);box-shadow:0 0 0 3px rgba(39,76,119,.11)}
input::placeholder{color:var(--c-faint)}

/* ═══ TOGGLE BUTTON (Eye) ═════════════════════════════════════════════════ */
.btn-eye{
  flex-shrink:0;padding:11px 16px;border:1.5px solid var(--c-border);border-radius:var(--r2);
  background:var(--c-surf2);color:var(--c-muted);cursor:pointer;
  font-size:.82rem;font-weight:700;font-family:var(--font);transition:var(--ease);
  white-space:nowrap;display:flex;align-items:center;gap:5px;
}
.btn-eye svg{width:16px;height:16px}
.btn-eye:hover{border-color:var(--c-blue);color:var(--c-blue);background:var(--c-blue-lt)}

/* ═══ BUTTONS ═════════════════════════════════════════════════════════════ */
.btn-row{display:flex;flex-wrap:wrap;gap:11px;margin-top:24px}
.btn{
  display:inline-flex;align-items:center;gap:8px;padding:12px 24px;border:none;
  border-radius:var(--r2);font-size:.93rem;font-weight:800;cursor:pointer;
  font-family:var(--font);transition:var(--ease);text-decoration:none;white-space:nowrap;
  position:relative;overflow:hidden;
}
.btn svg{width:19px;height:19px;flex-shrink:0}
.btn:disabled{opacity:.45;cursor:not-allowed;pointer-events:none}
.btn::after{content:'';position:absolute;inset:0;background:#fff;opacity:0;transition:opacity .15s}
.btn:hover:not(:disabled)::after{opacity:.08}
.btn:active:not(:disabled)::after{opacity:.16}

.btn-primary{background:var(--c-blue);color:#fff;box-shadow:0 2px 10px rgba(39,76,119,.28)}
.btn-primary:hover:not(:disabled){background:var(--c-blue-dk)}
.btn-success{background:var(--c-green);color:#fff;box-shadow:0 2px 10px rgba(22,163,74,.28)}
.btn-success:hover:not(:disabled){background:var(--c-green-dk)}
.btn-ghost{background:var(--c-surf);color:var(--c-txt);border:1.5px solid var(--c-border)}
.btn-ghost:hover:not(:disabled){border-color:var(--c-blue);color:var(--c-blue);background:var(--c-blue-lt)}
.btn-sm{padding:8px 16px;font-size:.8rem}
.btn-xs{padding:6px 12px;font-size:.75rem}

.spin{animation:spin .75s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ═══ PROGRESS ════════════════════════════════════════════════════════════ */
.prog-wrap{
  display:none;margin-top:20px;background:var(--c-surf2);border:1px solid var(--c-border);
  border-radius:var(--r2);padding:16px 18px;
}
.prog-wrap.show{display:block}
.prog-head{display:flex;justify-content:space-between;align-items:center;font-size:.85rem;font-weight:700;margin-bottom:9px}
.prog-track{height:8px;background:var(--c-border);border-radius:99px;overflow:hidden}
.prog-fill{height:100%;width:0;border-radius:99px;transition:width .25s ease;background:linear-gradient(90deg,var(--c-blue),var(--c-blue-md))}

/* ═══ PREVIEW SECTION ═════════════════════════════════════════════════════ */
.preview-wrap{display:none;margin-top:22px}
.preview-wrap.show{display:block}
.preview-header{
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:12px;margin-bottom:18px;
}
.preview-title{font-size:1.1rem;font-weight:800;color:var(--c-txt)}
.status-pill{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:99px;
  font-size:.8rem;font-weight:700;background:var(--c-green-lt);color:var(--c-green-dk);
  border:1px solid rgba(22,163,74,.2);
}
.status-pill svg{width:15px;height:15px}

.preview-grid{display:grid;grid-template-columns:1fr 260px;gap:18px;align-items:start}
@media(max-width:860px){.preview-grid{grid-template-columns:1fr}}

/* Canvas */
.canvas-shell{
  background:#d1d5db;border-radius:var(--r3);display:flex;align-items:center;justify-content:center;
  min-height:420px;position:relative;overflow:hidden;padding:18px;
}
.canvas-empty{text-align:center;color:var(--c-faint)}
.canvas-empty svg{width:52px;height:52px;margin:0 auto 12px;display:block;opacity:.35}
.canvas-empty p{font-size:.87rem}
#mainCanvas{max-width:100%;height:auto;border-radius:6px;box-shadow:0 4px 28px rgba(0,0,0,.18);display:none}
.canvas-footer{display:flex;align-items:center;justify-content:space-between;margin-top:12px;flex-wrap:wrap;gap:10px}
.page-indicator{font-size:.84rem;color:var(--c-muted)}
.page-indicator strong{color:var(--c-txt)}

/* Controls */
.ctrl-panel{
  background:var(--c-surf2);border:1px solid var(--c-border);border-radius:var(--r3);padding:20px;
}
.ctrl-section{margin-bottom:20px}
.ctrl-section:last-child{margin-bottom:0}
.ctrl-label{
  font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.07em;
  color:var(--c-faint);margin-bottom:10px;
}
.nav-btns{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.nav-btn{
  display:flex;align-items:center;justify-content:center;gap:5px;padding:9px 8px;
  border:1.5px solid var(--c-border);border-radius:var(--r2);background:var(--c-surf);
  cursor:pointer;font-size:.82rem;font-weight:700;color:var(--c-muted);transition:var(--ease);
  font-family:var(--font);
}
.nav-btn:hover:not(:disabled){border-color:var(--c-blue);color:var(--c-blue);background:var(--c-blue-lt)}
.nav-btn:disabled{opacity:.35;cursor:not-allowed}
.nav-btn svg{width:16px;height:16px}
.nav-btn.full{grid-column:1/-1}

.goto-row{display:flex;gap:7px;margin-top:10px}
.goto-row input{flex:1}

.zoom-row{display:flex;align-items:center;gap:9px}
.zoom-row input[type=range]{
  flex:1;accent-color:var(--c-blue);cursor:pointer;border:none;box-shadow:none;
  background:transparent;padding:0;height:auto;
}
.zoom-row input[type=range]:focus{box-shadow:none;border:none}
.zoom-val{font-size:.8rem;font-weight:800;color:var(--c-blue);min-width:42px;text-align:right}
.zoom-presets{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}

.divider{border:none;border-top:1px solid var(--c-border);margin:16px 0}

.kbd-tip{display:flex;align-items:center;gap:7px;font-size:.76rem;color:var(--c-muted);margin-bottom:6px}
kbd{
  display:inline-block;padding:2px 6px;border:1px solid var(--c-border);border-radius:3px;
  font-size:.7rem;background:var(--c-surf);font-family:monospace;box-shadow:0 1px 0 var(--c-border);
}

/* Thumbnails */
.thumbs-shell{
  margin-top:18px;background:var(--c-surf2);border:1px solid var(--c-border);
  border-radius:var(--r3);padding:18px;
}
.thumbs-hdr{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px;flex-wrap:wrap;gap:10px}
.thumbs-title{font-size:.95rem;font-weight:800;color:var(--c-txt)}
.thumbs-hint{font-size:.76rem;color:var(--c-muted)}
.thumb-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));
  gap:11px;max-height:400px;overflow-y:auto;padding-right:4px;
}
.thumb-grid::-webkit-scrollbar{width:5px}
.thumb-grid::-webkit-scrollbar-track{background:transparent}
.thumb-grid::-webkit-scrollbar-thumb{background:var(--c-border);border-radius:3px}
.thumb-card{
  cursor:pointer;background:var(--c-surf);border-radius:var(--r2);padding:5px;
  border:2px solid transparent;transition:var(--ease);box-shadow:var(--sh-sm);
}
.thumb-card:hover{border-color:var(--c-blue-md);transform:translateY(-2px);box-shadow:var(--sh-md)}
.thumb-card.is-active{border-color:var(--c-blue);box-shadow:0 0 0 3px rgba(39,76,119,.15)}
.thumb-inner{position:relative;overflow:hidden;border-radius:3px;line-height:0}
.thumb-inner canvas{width:100%;height:auto;display:block}
.thumb-num{
  position:absolute;bottom:3px;left:3px;background:rgba(0,0,0,.65);color:#fff;
  font-size:.62rem;font-weight:800;padding:2px 6px;border-radius:3px;
}

/* ═══ TOAST ═══════════════════════════════════════════════════════════════ */
.toast-shelf{
  position:fixed;bottom:24px;right:24px;z-index:9999;
  display:flex;flex-direction:column;gap:9px;pointer-events:none;
}
.toast{
  display:flex;align-items:center;gap:11px;padding:13px 20px;border-radius:var(--r3);
  font-size:.88rem;font-weight:700;box-shadow:var(--sh-lg);pointer-events:auto;
  max-width:360px;animation:slideUp .28s ease;
}
.toast svg{width:18px;height:18px;flex-shrink:0}
@keyframes slideUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.t-success{background:var(--c-green);color:#fff}
.t-error{background:var(--c-red);color:#fff}
.t-info{background:var(--c-blue);color:#fff}
.t-warn{background:var(--c-amber);color:#fff}

/* ═══ PRIVACY NOTICE ══════════════════════════════════════════════════════ */
.privacy-bar{
  display:flex;align-items:center;gap:10px;padding:11px 16px;
  background:var(--c-green-lt);border:1px solid rgba(22,163,74,.2);
  border-radius:var(--r2);margin-top:16px;font-size:.8rem;font-weight:600;color:var(--c-green-dk);
}
.privacy-bar svg{width:17px;height:17px;flex-shrink:0}

/* ═══ SEO / INFO SECTIONS ═════════════════════════════════════════════════ */
.info-2col{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:20px}
@media(max-width:640px){.info-2col{grid-template-columns:1fr}}
.info-box{background:var(--c-surf2);border:1px solid var(--c-border);border-radius:var(--r3);padding:20px}
.info-box h3{font-size:1rem;font-weight:800;color:var(--c-txt);margin-bottom:13px}
.info-list{list-style:none;display:flex;flex-direction:column;gap:9px}
.info-list li{display:flex;align-items:flex-start;gap:10px;font-size:.84rem;color:var(--c-muted);line-height:1.5}
.info-list li::before{
  content:'';display:block;width:7px;height:7px;border-radius:50%;
  background:var(--c-blue);flex-shrink:0;margin-top:6px;
}
.info-list.numbered{counter-reset:s}
.info-list.numbered li{counter-increment:s}
.info-list.numbered li::before{
  content:counter(s);width:20px;height:20px;font-size:.65rem;font-weight:900;
  background:var(--c-blue);color:#fff;border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin-top:0;flex-shrink:0;
}

.faq{display:flex;flex-direction:column;gap:14px}
.faq dt{font-size:.9rem;font-weight:800;color:var(--c-txt);margin-bottom:4px}
.faq dd{font-size:.82rem;color:var(--c-muted);line-height:1.6}

.feat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:18px 0}
.feat-card{
  background:var(--c-surf2);border:1px solid var(--c-border);border-radius:var(--r3);
  padding:18px;display:flex;flex-direction:column;gap:8px;
}
.feat-card h4{font-size:.88rem;font-weight:800;color:var(--c-txt)}
.feat-card p{font-size:.8rem;color:var(--c-muted);line-height:1.55}

/* ═══ SIDEBAR ═════════════════════════════════════════════════════════════ */
.aside-sticky{position:sticky;top:18px}
.info-sidebar{
  background:var(--c-blue-lt);border:1px solid rgba(39,76,119,.15);
  border-radius:var(--r3);padding:20px;margin-top:18px;
}
.info-sidebar h3{font-size:.95rem;font-weight:800;color:var(--c-blue);margin-bottom:11px}
.info-sidebar p{font-size:.82rem;color:var(--c-txt);line-height:1.6;margin-bottom:14px}
.check-list{display:flex;flex-direction:column;gap:9px}
.check-item{display:flex;align-items:flex-start;gap:9px;font-size:.8rem;color:var(--c-txt)}
.check-item svg{width:16px;height:16px;color:var(--c-green);flex-shrink:0;margin-top:1px}

/* ═══ AD CONTAINERS ═══════════════════════════════════════════════════════ */
.ad-container{background:var(--c-surf);border:1px solid var(--c-border);border-radius:var(--r3);padding:16px;text-align:center;min-height:90px}
.ad-label{font-size:.65rem;color:var(--c-faint);text-transform:uppercase;letter-spacing:.08em;font-weight:700;margin-bottom:6px}

/* ═══ ACCESSIBILITY ═══════════════════════════════════════════════════════ */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border-width:0}

/* ═══ RESPONSIVE ══════════════════════════════════════════════════════════ */
@media(max-width:480px){
  .btn-row{flex-direction:column}
  .btn{width:100%;justify-content:center}
  .preview-grid{grid-template-columns:1fr}
}

/* Upload zone with file info */
.upload-zone.has-file .upload-inner {
  display: none;
}

.upload-zone .upload-file-info {
  display: none;
  padding: 30px 20px;
  text-align: center;
}

.upload-zone.has-file .upload-file-info {
  display: block;
}

.upload-file-info .file-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 10px;
}

.upload-file-info .file-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-txt);
  word-break: break-all;
  display: block;
}

.upload-file-info .file-size {
  font-size: .85rem;
  color: var(--c-muted);
  display: block;
  margin-top: 6px;
}