*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --blue-dark:#0f3460;--blue-mid:#1a56a0;--blue-light:#2a7de1;--blue-pale:#e8f1fd;
  --white:#ffffff;--bg:#f4f8ff;--text-main:#1a1f36;--text-muted:#5a6478;
  --border:#dce6f7;--radius:12px;--shadow:0 2px 12px rgba(15,52,96,0.08);
  --green:#16a34a;--green-pale:#dcfce7;--red:#dc2626;--red-pale:#fee2e2;
}
body { font-family:'Plus Jakarta Sans',Arial,sans-serif; background:var(--bg); color:var(--text-main); line-height:1.6; }
.skip-link { position:absolute;top:-100px;left:16px;background:var(--blue-dark);color:#fff;padding:8px 16px;border-radius:0 0 var(--radius) var(--radius);font-size:14px;text-decoration:none;z-index:999;transition:top 0.2s; }
.skip-link:focus { top:0; }
.site-header { background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100; }
.nav-inner { max-width:1100px;margin:0 auto;padding:0 24px;height:62px;display:flex;align-items:center;justify-content:space-between; }
.logo { font-size:22px;font-weight:700;color:var(--blue-dark);letter-spacing:-0.5px;text-decoration:none; }
.logo span { color:var(--blue-light); }
.nav-links { display:flex;gap:4px;list-style:none; }
.nav-links a { text-decoration:none;font-size:14px;font-weight:500;color:var(--text-muted);padding:6px 14px;border-radius:8px;transition:background 0.2s,color 0.2s; }
.nav-links a:hover { background:var(--blue-pale);color:var(--blue-light); }
.container { max-width:1100px;margin:0 auto;padding:0 24px; }
.breadcrumb-bar { background:var(--white);border-bottom:1px solid var(--border);padding:10px 0; }
.breadcrumb { list-style:none;display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-muted); }
.breadcrumb a { color:var(--blue-light);text-decoration:none; }
.breadcrumb li[aria-current="page"] { color:var(--text-main);font-weight:500; }
.tool-hero { background:linear-gradient(135deg,var(--blue-dark) 0%,var(--blue-mid) 60%,var(--blue-light) 100%);color:var(--white);text-align:center;padding:48px 24px 40px; }
.tool-hero-icon { width:64px;height:64px;border-radius:16px;background:rgba(255,255,255,0.15);border:1px solid rgba(255,255,255,0.3);display:flex;align-items:center;justify-content:center;font-size:26px;margin:0 auto 16px; }
.tool-hero h1 { font-size:clamp(24px,4vw,38px);font-weight:700;letter-spacing:-0.5px;margin-bottom:12px; }
.tool-hero p { font-size:16px;opacity:0.88;max-width:520px;margin:0 auto; }
.tool-section { padding:40px 0; }
.tool-card-main { background:var(--white);border:1px solid var(--border);border-radius:16px;padding:32px;max-width:660px;margin:0 auto;box-shadow:var(--shadow); }
.upload-zone { border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:border-color 0.2s,background 0.2s;position:relative; }
.upload-zone:hover,.upload-zone.drag-over { border-color:var(--blue-light);background:var(--blue-pale); }
.upload-zone i { font-size:40px;color:var(--blue-light);margin-bottom:14px;display:block; }
.upload-title { font-size:16px;font-weight:600;color:var(--text-main);margin-bottom:4px; }
.upload-sub { font-size:13px;color:var(--text-muted); }
.upload-zone input[type="file"] { position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%; }
.file-info { display:flex;align-items:center;gap:14px;background:var(--blue-pale);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;margin-bottom:20px; }
.file-info .fa-image { font-size:28px;color:var(--blue-light);flex-shrink:0; }
.file-name { font-size:14px;font-weight:600;color:var(--text-main);word-break:break-all; }
.file-meta { font-size:12px;color:var(--text-muted);margin-top:2px; }
.file-remove { margin-left:auto;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:16px;padding:4px;border-radius:50%;transition:color 0.2s,background 0.2s;flex-shrink:0; }
.file-remove:hover { color:var(--red);background:var(--red-pale); }
.tool-options { }
.option-label { font-size:12px;font-weight:700;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.8px;display:flex;align-items:center;gap:6px;margin-bottom:10px; }
.option-label span { font-size:13px;font-weight:700;color:var(--blue-dark);text-transform:none;letter-spacing:0; }
.radio-label { display:flex;align-items:center;gap:6px;font-size:14px;cursor:pointer; }

/* Live preview */
.preview-row { display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap; }
.preview-box { flex:1;min-width:120px;text-align:center; }
.preview-box img { width:100%;max-height:180px;object-fit:contain;border:1px solid var(--border);border-radius:8px;background:var(--bg); }
.preview-label { font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:0.6px;margin-bottom:6px; }
.preview-size { font-size:12px;color:var(--text-muted);margin-top:6px;font-weight:500; }
.preview-arrow { font-size:20px;color:var(--text-muted);flex-shrink:0; }

.btn-action { width:100%;padding:14px;border-radius:var(--radius);background:var(--blue-light);color:#fff;border:none;font-size:16px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:background 0.2s,transform 0.15s;font-family:inherit; }
.btn-action:hover { background:var(--blue-mid);transform:translateY(-1px); }

/* Result */
.tool-result { text-align:center;padding:16px 0; }
.tool-result .fa-check-circle { font-size:48px;color:var(--green);margin-bottom:12px;display:block; }
.tool-result > p { font-size:16px;font-weight:600;color:var(--text-main);margin-bottom:16px; }
.size-comparison { display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:20px;flex-wrap:wrap; }
.sz-box { background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:10px 20px;text-align:center;min-width:110px; }
.sz-label { font-size:11px;text-transform:uppercase;letter-spacing:0.8px;color:var(--text-muted);font-weight:600; }
.sz-val { font-size:18px;font-weight:700;color:var(--text-main);margin-top:2px; }
.sz-box.after .sz-val { color:var(--green); }
.sz-arrow { font-size:20px;color:var(--text-muted); }
.sz-badge { font-size:13px;font-weight:600;padding:5px 14px;border-radius:999px; }
.sz-badge.saved { color:var(--green);background:var(--green-pale); }
.sz-badge.neutral { color:#92400e;background:#fef3c7; }
.btn-download { display:inline-flex;align-items:center;gap:8px;padding:12px 28px;background:var(--green);color:#fff;border:none;border-radius:var(--radius);font-size:15px;font-weight:600;cursor:pointer;margin-bottom:12px;transition:background 0.2s;font-family:inherit; }
.btn-download:hover { background:#15803d; }
.btn-again { display:block;margin:0 auto;background:none;border:none;color:var(--blue-light);font-size:14px;font-weight:500;cursor:pointer;text-decoration:underline;font-family:inherit; }
.tool-error { text-align:center;padding:16px 0; }
.tool-error .fa-exclamation-triangle { font-size:40px;color:var(--red);margin-bottom:12px;display:block; }
.tool-error p { font-size:15px;color:var(--text-muted);margin-bottom:16px; }
.trust-row { display:flex;justify-content:center;flex-wrap:wrap;gap:20px;margin-top:20px;max-width:660px;margin-left:auto;margin-right:auto; }
.trust-row span { font-size:13px;color:var(--text-muted);display:flex;align-items:center;gap:6px; }
.trust-row i { color:var(--blue-light); }
.content-section { padding:56px 0; }
.content-grid { display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start; }
.content-main h2 { font-size:22px;font-weight:700;color:var(--blue-dark);margin:32px 0 12px; }
.content-main h2:first-child { margin-top:0; }
.content-main h3 { font-size:17px;font-weight:600;color:var(--text-main);margin:24px 0 10px; }
.content-main p { font-size:15px;color:var(--text-muted);margin-bottom:14px;line-height:1.7; }
.guide-steps,.guide-list { margin:0 0 16px 20px;display:flex;flex-direction:column;gap:10px; }
.guide-steps li,.guide-list li { font-size:15px;color:var(--text-muted);line-height:1.65; }
.guide-steps li strong,.guide-list li strong { color:var(--text-main); }
.content-sidebar { display:flex;flex-direction:column;gap:20px; }
.sidebar-card { background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow); }
.sidebar-card h3 { font-size:13px;font-weight:700;color:var(--blue-dark);margin-bottom:14px;text-transform:uppercase;letter-spacing:0.8px; }
.sidebar-tools { list-style:none;display:flex;flex-direction:column;gap:2px; }
.sidebar-tools a { display:flex;align-items:center;gap:10px;padding:9px 10px;border-radius:8px;font-size:14px;font-weight:500;color:var(--text-main);text-decoration:none;transition:background 0.15s,color 0.15s; }
.sidebar-tools a:hover { background:var(--blue-pale);color:var(--blue-light); }
.sidebar-tools i { color:var(--blue-light);width:16px;text-align:center;flex-shrink:0; }
.tip-list { list-style:none;display:flex;flex-direction:column;gap:10px; }
.tip-list li { font-size:13px;color:var(--text-muted);display:flex;align-items:flex-start;gap:8px;line-height:1.5; }
.tip-list .fa-lightbulb { color:#eab308;margin-top:2px;flex-shrink:0; }
.section-alt { background:var(--white);border-top:1px solid var(--border);border-bottom:1px solid var(--border);padding:56px 0; }
.section-alt h2 { font-size:26px;font-weight:700;color:var(--blue-dark);margin-bottom:10px; }
.section-intro { font-size:15px;color:var(--text-muted);margin-bottom:28px; }
.faq-list { display:flex;flex-direction:column;gap:12px; }
.faq-item { background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden; }
.faq-item summary { padding:16px 20px;font-size:15px;font-weight:600;color:var(--text-main);cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center; }
.faq-item summary::-webkit-details-marker { display:none; }
.faq-item summary::after { content:'+';font-size:20px;font-weight:400;color:var(--blue-light);transition:transform 0.2s; }
.faq-item[open] summary::after { transform:rotate(45deg); }
.faq-item[open] summary { border-bottom:1px solid var(--border);color:var(--blue-dark); }
.faq-item p { padding:16px 20px;font-size:14px;color:var(--text-muted);line-height:1.65; }
.site-footer { background:var(--blue-dark);color:rgba(255,255,255,0.7);padding:48px 0 0; }
.footer-grid { display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px; }
.footer-brand { font-size:20px;font-weight:700;color:#fff;margin-bottom:10px; }
.footer-text { font-size:14px;line-height:1.6;max-width:220px; }
.footer-heading { font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:rgba(255,255,255,0.5);margin-bottom:14px; }
.footer-links { list-style:none;display:flex;flex-direction:column;gap:10px; }
.footer-links a { color:rgba(255,255,255,0.7);text-decoration:none;font-size:14px;transition:color 0.2s; }
.footer-links a:hover { color:#fff; }
.footer-bottom { border-top:1px solid rgba(255,255,255,0.1);padding:20px 24px; }
.footer-meta { font-size:13px;color:rgba(255,255,255,0.45);text-align:center; }
@media(max-width:900px){.content-grid{grid-template-columns:1fr;}.footer-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:540px){.nav-links{display:none;}.tool-card-main{padding:20px 16px;}.footer-grid{grid-template-columns:1fr;}.preview-row{flex-direction:column;}.preview-arrow{transform:rotate(90deg);}}