:root{
  --bg:#0f172a;
  --bg2:#111827;
  --panel:#ffffff;
  --panel-soft:#f8fafc;
  --text:#0f172a;
  --muted:#64748b;
  --primary:#2563eb;
  --primary-hover:#1d4ed8;
  --accent:#10b981;
  --border:#e2e8f0;
  --shadow:0 10px 30px rgba(2,6,23,.08);
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#eef2ff 0%,#f8fafc 60%,#ffffff 100%);min-height:100vh}

/* ---------- LOGIN ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;background:radial-gradient(1200px 600px at 20% 0%,#dbeafe,transparent),radial-gradient(900px 500px at 80% 100%,#fae8ff,transparent),#f8fafc}
.login-card{background:var(--panel);width:380px;max-width:92vw;padding:34px 28px;border-radius:18px;box-shadow:var(--shadow);display:flex;flex-direction:column;gap:14px}
.login-card .logo{font-size:42px;text-align:center}
.login-card h1{margin:0;text-align:center;font-size:22px}
.login-card .muted{text-align:center;margin:-6px 0 6px}
.login-card label{display:flex;flex-direction:column;font-size:13px;color:#334155;gap:6px}
.login-card input{padding:11px 12px;border:1px solid var(--border);border-radius:10px;font-size:15px;outline:none;transition:border .15s, box-shadow .15s}
.login-card input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
.error{background:#fef2f2;color:#b91c1c;padding:10px 12px;border-radius:10px;font-size:14px;border:1px solid #fecaca}

/* ---------- TOPBAR ---------- */
.topbar{display:flex;justify-content:space-between;align-items:center;padding:18px 28px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.brand{font-weight:700;font-size:18px;display:flex;align-items:center;gap:10px}
.actions{display:flex;align-items:center;gap:14px}
.link{color:var(--primary);text-decoration:none;font-weight:600}
.link:hover{text-decoration:underline}

/* ---------- LAYOUT ---------- */
.container{max-width:1100px;margin:24px auto;padding:0 20px;display:flex;flex-direction:column;gap:20px}
.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
.card h2{margin:0 0 6px;font-size:18px}
.card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;flex-wrap:wrap}
.muted{color:var(--muted);font-size:14px}

/* ---------- BUTTONS ---------- */
button,.btn-primary,.btn-secondary{font:inherit;cursor:pointer;border-radius:10px;padding:10px 16px;font-weight:600;transition:transform .05s, background .15s, box-shadow .15s;border:1px solid transparent}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-hover)}
.btn-primary:disabled{background:#cbd5e1;cursor:not-allowed}
.btn-secondary{background:#fff;border-color:var(--border);color:var(--text)}
.btn-secondary:hover{background:#f1f5f9}
.actions-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:12px}

/* ---------- DROPZONE ---------- */
.dropzone{margin-top:14px;border:2px dashed #cbd5e1;background:var(--panel-soft);border-radius:14px;padding:34px;text-align:center;transition:.15s}
.dropzone.dragover{border-color:var(--primary);background:#eff6ff}
.dz-inner{display:flex;flex-direction:column;align-items:center;gap:8px}
.dz-icon{font-size:38px}
.dz-title{font-weight:600;font-size:17px}

.status{margin-top:12px;padding:10px 14px;border-radius:10px;background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0;font-size:14px}
.status.err{background:#fef2f2;color:#b91c1c;border-color:#fecaca}

.file-list{list-style:none;padding:0;margin:14px 0 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px;max-height:180px;overflow:auto}
.file-list li{background:var(--panel-soft);border:1px solid var(--border);border-radius:8px;padding:6px 10px;font-size:13px;color:#334155;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- GRID CONTROLS ---------- */
.grid-controls{margin-top:10px;display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end}
.grid-controls label{display:flex;flex-direction:column;font-size:13px;color:#334155;gap:6px}
.grid-controls input{width:130px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:15px;outline:none}
.grid-controls input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(37,99,235,.12)}
.presets{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.chip{background:#fff;border:1px solid var(--border);border-radius:999px;padding:6px 12px;font-size:13px;color:#0f172a}
.chip:hover{background:#eff6ff;border-color:#bfdbfe}

/* ---------- PREVIEW ---------- */
.preview-grid{margin-top:14px;display:flex;flex-direction:column;gap:18px}
.preview-item{background:
  linear-gradient(45deg,#f1f5f9 25%,transparent 25%) 0 0/20px 20px,
  linear-gradient(-45deg,#f1f5f9 25%,transparent 25%) 0 10px/20px 20px,
  linear-gradient(45deg,transparent 75%,#f1f5f9 75%) 10px -10px/20px 20px,
  linear-gradient(-45deg,transparent 75%,#f1f5f9 75%) -10px 0/20px 20px,
  #fff;
  border:1px solid var(--border);border-radius:12px;padding:14px;display:flex;flex-direction:column;gap:8px}
.preview-item .ph{display:flex;justify-content:space-between;align-items:center;gap:10px}
.preview-item .ph .name{font-weight:600}
.preview-item img{max-width:100%;height:auto;display:block;margin:0 auto}

.hidden{display:none !important}

/* ---------- PRINT ---------- */
.print-area{display:none}

@media print{
  @page{size:A4 landscape;margin:0}
  html,body{background:#fff !important}
  .no-print{display:none !important}
  .print-area{display:block}
  .print-area .page{
    page-break-after:always;
    break-after:page;
    width:100vw;height:100vh;
    display:flex;align-items:center;justify-content:center;
    padding:0;margin:0;background:transparent;
  }
  .print-area .page:last-child{page-break-after:auto;break-after:auto}
  .print-area img{
    max-width:100%;max-height:100%;
    object-fit:contain;
    background:transparent;
  }
}