*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#6366f1;--secondary:#818cf8;
  --bg:#0f0f14;--bg-surface:#18181f;--bg-card:#1e1e28;
  --border:rgba(255,255,255,.08);--border-hover:rgba(99,102,241,.35);
  --text:#e8e8f0;--text-muted:#8888a8;--text-faint:#555570;
  --radius-sm:8px;--radius-md:14px;--radius-lg:20px;
  --transition:.2s cubic-bezier(.4,0,.2,1)
}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
svg{display:block}

/* ── HEADER ── */
.site-header{position:sticky;top:0;z-index:100;background:rgba(15,15,20,.9);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;gap:24px;height:64px;width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(16px,4vw,48px)}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:36px;height:36px}
.logo-text{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,#fff 40%,var(--primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{padding:6px 14px;border-radius:var(--radius-sm);font-size:.9rem;font-weight:500;color:var(--text-muted);transition:all var(--transition)}
.nav-link:hover,.nav-link.active{color:var(--text);background:rgba(255,255,255,.06)}

/* ── LAYOUT ── */
.main-wrap{width:100%;max-width:1280px;margin-inline:auto;padding:clamp(16px,2.5vw,36px) clamp(16px,4vw,48px) clamp(40px,6vw,80px)}

/* ── HERO ── */
.tool-hero{text-align:center;padding:clamp(14px,2.5vw,32px) 0 clamp(18px,2.5vw,28px)}
.tool-badge{display:inline-flex;align-items:center;gap:6px;padding:4px 14px;border-radius:999px;font-size:.75rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;background:rgba(99,102,241,.1);border:1px solid rgba(99,102,241,.25);color:#a5b4fc;margin-bottom:14px}
.tool-title{font-size:clamp(2rem,5vw,3rem);font-weight:900;letter-spacing:-.04em;line-height:1.1;margin-bottom:8px}
.gradient-title{background:linear-gradient(135deg,var(--primary),var(--secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.tool-subtitle{font-size:clamp(.9rem,2vw,1.05rem);color:var(--text-muted);max-width:600px;margin:0 auto}

.ad-slot{background:rgba(255,255,255,.02);border:1px dashed rgba(255,255,255,.07);border-radius:var(--radius-md);min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--text-faint);font-size:.75rem;overflow:hidden}

/* ── DROP ZONE ── */
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);padding:clamp(40px,6vw,80px) 24px;text-align:center;transition:all var(--transition);cursor:pointer;background:var(--bg-card);position:relative}
.drop-zone:hover,.drop-zone.dragging{border-color:var(--primary);background:rgba(99,102,241,.05)}
.drop-zone input[type=file]{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}
.drop-icon{width:52px;height:52px;margin:0 auto 16px;color:var(--text-faint)}
.drop-title{font-size:1rem;font-weight:700;margin-bottom:6px}
.drop-sub{font-size:.83rem;color:var(--text-faint)}
.drop-formats{display:flex;justify-content:center;gap:8px;margin-top:14px;flex-wrap:wrap}
.format-badge{padding:3px 10px;border-radius:999px;font-size:.72rem;font-weight:700;border:1px solid var(--border);color:var(--text-faint)}

/* ── TOOL GRID ── */
.tool-grid{display:grid;grid-template-columns:340px 1fr;gap:16px;align-items:start;margin-top:16px}
@media(max-width:960px){.tool-grid{grid-template-columns:1fr}}

/* ── PANELS ── */
.panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden}
.panel-header{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.15)}
.panel-title{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--text-faint)}
.panel-body{padding:16px;display:flex;flex-direction:column;gap:12px}

/* ── MODE TABS ── */
.mode-tabs{display:flex;gap:0;border-bottom:1px solid var(--border)}
.mode-tab{flex:1;padding:9px 8px;font-size:.78rem;font-weight:700;color:var(--text-faint);border-bottom:2px solid transparent;transition:all var(--transition);text-align:center}
.mode-tab:hover{color:var(--text-muted)}
.mode-tab.active{color:var(--primary);border-bottom-color:var(--primary)}

/* ── FORM FIELDS ── */
.field{display:flex;flex-direction:column;gap:5px}
.field-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint)}
.field-input{width:100%;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;color:var(--text);font-family:inherit;font-size:.88rem;outline:none;transition:border-color var(--transition)}
.field-input:focus{border-color:var(--primary)}
.field-input::placeholder{color:var(--text-faint)}
.field-select{width:100%;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px 10px;color:var(--text);font-family:inherit;font-size:.85rem;outline:none;transition:border-color var(--transition);-webkit-appearance:none;appearance:none;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='%23555570' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}
.field-select:focus{border-color:var(--primary)}
.field-select option{background:#1e1e28}

.dim-row{display:grid;grid-template-columns:1fr 28px 1fr;gap:6px;align-items:center}
.dim-sep{text-align:center;font-size:.85rem;color:var(--text-faint);font-weight:700}
.dim-unit{font-size:.7rem;color:var(--text-faint);text-align:right;margin-top:2px}

.lock-btn{display:flex;align-items:center;gap:6px;padding:6px 10px;border-radius:var(--radius-sm);font-size:.75rem;font-weight:700;color:var(--text-faint);border:1px solid var(--border);transition:all var(--transition);width:100%;justify-content:center;margin-top:2px}
.lock-btn.locked{color:var(--primary);border-color:var(--border-hover);background:rgba(99,102,241,.08)}
.lock-btn svg{width:13px;height:13px;flex-shrink:0}

.range-wrap{display:flex;flex-direction:column;gap:4px}
.range-slider{width:100%;accent-color:var(--primary);cursor:pointer;height:4px}
.range-labels{display:flex;justify-content:space-between;font-size:.68rem;color:var(--text-faint)}

/* ── PRESETS ── */
.preset-group{margin-bottom:2px}
.preset-group-label{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--text-faint);padding:6px 0 4px}
.preset-grid{display:grid;grid-template-columns:1fr 1fr;gap:5px}
.preset-btn{padding:6px 8px;border-radius:var(--radius-sm);font-size:.72rem;font-weight:600;color:var(--text-muted);border:1px solid var(--border);text-align:left;transition:all var(--transition);line-height:1.3}
.preset-btn:hover,.preset-btn.active{color:var(--text);border-color:var(--border-hover);background:rgba(99,102,241,.08)}
.preset-btn.active{color:var(--primary)}
.preset-dim{display:block;font-size:.65rem;color:var(--text-faint);margin-top:1px;font-weight:400}

/* ── OUTPUT OPTIONS ── */
.format-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}

/* ── BUTTONS ── */
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 20px;border-radius:var(--radius-sm);font-size:.88rem;font-weight:700;background:var(--primary);color:#fff;border:none;transition:all var(--transition);width:100%}
.btn-primary:hover{background:var(--secondary)}
.btn-primary:disabled{opacity:.4;cursor:not-allowed}
.btn-primary svg{width:15px;height:15px}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:9px 16px;border-radius:var(--radius-sm);font-size:.83rem;font-weight:700;background:none;color:var(--text-muted);border:1.5px solid var(--border);transition:all var(--transition)}
.btn-outline:hover{border-color:var(--border-hover);color:var(--text)}
.btn-outline svg{width:14px;height:14px}
.btn-dl{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 20px;border-radius:var(--radius-sm);font-size:.85rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--secondary));color:#fff;border:none;transition:opacity var(--transition)}
.btn-dl:hover{opacity:.88}
.btn-dl:disabled{opacity:.35;cursor:not-allowed}
.btn-dl svg{width:14px;height:14px}

/* ── INFO STRIP ── */
.info-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:12px}
@media(max-width:600px){.info-strip{grid-template-columns:1fr 1fr}}
.info-box{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 12px;text-align:center}
.info-val{font-size:1rem;font-weight:800;color:var(--primary);line-height:1;margin-bottom:3px}
.info-lbl{font-size:.65rem;color:var(--text-faint);text-transform:uppercase;letter-spacing:.05em}

/* ── COMPARE SLIDER ── */
.compare-wrap{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  border:1px solid var(--border);
  background:repeating-conic-gradient(rgba(255,255,255,.04) 0% 25%,transparent 0% 50%) 0 0/20px 20px;
  cursor:col-resize;touch-action:none;line-height:0
}
.compare-base{display:block;width:100%;height:auto;max-height:520px;object-fit:contain;pointer-events:none}
.compare-overlay{position:absolute;inset:0;pointer-events:none}
.compare-img{display:block;width:100%;height:100%;max-height:520px;object-fit:contain;pointer-events:none;position:absolute;top:0;left:0}
.compare-line{position:absolute;top:0;bottom:0;width:3px;background:rgba(255,255,255,.9);box-shadow:0 0 8px rgba(0,0,0,.5);transform:translateX(-50%);pointer-events:none;display:flex;align-items:center;justify-content:center}
.compare-handle{width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.95);box-shadow:0 2px 14px rgba(0,0,0,.35);display:flex;align-items:center;justify-content:center;flex-shrink:0;color:#1a1a2e;pointer-events:none;transition:transform .1s}
.compare-wrap:active .compare-handle,.compare-wrap.dragging .compare-handle{transform:scale(1.12)}
.compare-label{position:absolute;top:12px;padding:3px 10px;border-radius:999px;font-size:.68rem;font-weight:800;letter-spacing:.07em;text-transform:uppercase;pointer-events:none;background:rgba(0,0,0,.55);backdrop-filter:blur(4px);color:#fff}
.compare-label-l{left:12px}
.compare-label-r{right:12px}
.compare-range{width:100%;margin-top:10px;accent-color:var(--primary);cursor:pointer}

/* ── PLACEHOLDER ── */
.preview-placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:280px;color:var(--text-faint);gap:12px;border:1px solid var(--border);border-radius:var(--radius-lg);background:var(--bg-card)}
.preview-placeholder svg{width:48px;height:48px;opacity:.3}
.preview-placeholder p{font-size:.85rem}

/* ── STATUS BADGE ── */
.status-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;border-radius:999px;font-size:.75rem;font-weight:700}
.badge-ready{background:rgba(52,211,153,.12);color:#34d399}
.badge-processing{background:rgba(251,191,36,.12);color:#fbbf24}
.badge-idle{background:rgba(255,255,255,.06);color:var(--text-faint)}

/* ── SECTIONS ── */
.page-section{margin-top:clamp(32px,5vw,56px)}
.section-title{font-size:clamp(1.2rem,2.5vw,1.7rem);font-weight:800;letter-spacing:-.03em;margin-bottom:8px}
.section-desc{color:var(--text-muted);font-size:.9rem;margin-bottom:24px}
.section-divider{border:none;border-top:1px solid var(--border);margin:clamp(24px,4vw,44px) 0}

.steps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.step-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px}
.step-num{width:32px;height:32px;border-radius:50%;background:rgba(99,102,241,.15);color:var(--primary);font-size:.9rem;font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.step-title{font-size:.93rem;font-weight:700;margin-bottom:6px}
.step-desc{font-size:.82rem;color:var(--text-muted);line-height:1.6}

.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:18px}
.feature-icon{font-size:1.4rem;margin-bottom:10px}
.feature-title{font-size:.88rem;font-weight:700;margin-bottom:5px}
.feature-desc{font-size:.78rem;color:var(--text-muted);line-height:1.5}

.faq-list{display:flex;flex-direction:column;gap:8px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden}
.faq-q{display:flex;align-items:center;justify-content:space-between;width:100%;padding:14px 18px;font-size:.9rem;font-weight:600;color:var(--text);text-align:left;gap:12px}
.faq-q:hover{color:var(--primary)}
.faq-icon{font-size:1.2rem;color:var(--text-faint);flex-shrink:0;transition:transform var(--transition)}
.faq-a{display:none;padding:0 18px 16px;font-size:.85rem;color:var(--text-muted);line-height:1.7}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-icon{transform:rotate(45deg);color:var(--primary)}

.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.related-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:16px;display:flex;flex-direction:column;gap:8px;transition:all var(--transition)}
.related-card:hover{border-color:var(--border-hover);transform:translateY(-2px)}
.related-icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.related-icon svg{width:20px;height:20px;color:#fff}
.related-name{font-size:.88rem;font-weight:700}
.related-desc{font-size:.78rem;color:var(--text-muted);line-height:1.4;flex:1}
.related-link{font-size:.78rem;color:var(--primary);font-weight:600}

/* ── FOOTER ── */
.site-footer{background:var(--bg-surface);border-top:1px solid var(--border);margin-top:64px;padding-top:40px}
.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px;width:100%;max-width:1280px;margin-inline:auto;padding-inline:clamp(16px,4vw,48px);padding-bottom:40px}
.footer-heading{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:10px}
.footer-links{display:flex;flex-direction:column;gap:7px}
.footer-links a{font-size:.85rem;color:var(--text-muted);transition:color var(--transition)}
.footer-links a:hover{color:var(--text)}
.footer-brand-text{font-size:.82rem;color:var(--text-faint);margin-top:10px;line-height:1.5}
.footer-bottom{border-top:1px solid var(--border);padding:18px clamp(16px,4vw,48px);width:100%;max-width:1280px;margin-inline:auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;font-size:.78rem;color:var(--text-faint)}

.toast{position:fixed;bottom:24px;right:24px;background:#1e1e28;border:1px solid var(--border);border-radius:var(--radius-md);padding:10px 20px;font-size:.85rem;font-weight:600;color:var(--text);box-shadow:0 8px 32px rgba(0,0,0,.4);transform:translateY(80px);opacity:0;transition:all .3s;z-index:1000;pointer-events:none}
.toast.show{transform:translateY(0);opacity:1}

@media(max-width:768px){.main-nav{display:none}.footer-grid{grid-template-columns:1fr}}