*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --bg:#07080d;
  --bg-elev:#0e1018;
  --border:rgba(255,255,255,0.09);
  --border-strong:rgba(255,255,255,0.16);
  --text:#f4f4f8;
  --text2:#9b9bb8;
  --text3:#5c5c78;
  --surf:rgba(255,255,255,0.045);
  --surf2:rgba(255,255,255,0.09);
  --accent:oklch(68% 0.19 275);
  --accent-dim:oklch(68% 0.19 275 / 0.22);
  --accent-glow:oklch(68% 0.19 275 / 0.45);
  --ok:#7dd3a8;
  --err:#ff9a9a;
  --mono:'DM Mono',ui-monospace,monospace;
  --radius:14px;
  --radius-lg:22px;
  --shadow-soft:0 4px 24px rgba(0,0,0,0.35);
  --shadow-glow:0 0 0 1px var(--accent-dim),0 12px 40px -12px var(--accent-glow);
}

html[data-theme="light"]{
  --bg:#f0f2fa;
  --bg-elev:#ffffff;
  --border:rgba(15,20,40,0.1);
  --border-strong:rgba(15,20,40,0.16);
  --text:#12131a;
  --text2:#5a5d72;
  --text3:#8b8fa3;
  --surf:rgba(15,25,55,0.04);
  --surf2:rgba(15,25,55,0.07);
  --shadow-soft:0 4px 28px rgba(15,25,55,0.08);
  --shadow-glow:0 0 0 1px oklch(68% 0.19 275 / 0.2),0 16px 48px -16px oklch(68% 0.19 275 / 0.25);
}

html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:0.01ms!important;animation-iteration-count:1!important;transition-duration:0.01ms!important}
}

html,body{min-height:100%}
body{
  color:var(--text);
  font-family:'Sora',system-ui,sans-serif;
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}

/* Ambient background */
body::before{
  content:'';
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  opacity:1;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%,oklch(68% 0.19 275 / 0.14),transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 50%,oklch(55% 0.12 280 / 0.08),transparent 50%),
    url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
}
html[data-theme="light"] body::before{
  background:
    radial-gradient(ellipse 90% 60% at 50% -10%,oklch(68% 0.19 275 / 0.12),transparent 50%),
    url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
}

.app{position:relative;z-index:1;min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}

/* ——— Nav ——— */
.nav-shell{
  flex-shrink:0;
  height:56px;
  border-bottom:1px solid var(--border);
  background:color-mix(in oklab,var(--bg) 82%,transparent);
  backdrop-filter:blur(18px) saturate(1.2);
  position:relative;
  z-index:200;
}
html[data-theme="light"] .nav-shell{background:rgba(255,255,255,.88);box-shadow:0 1px 0 rgba(0,0,0,.05)}
.nav-inner{max-width:100%;margin:0 auto;padding:0 18px;height:100%;width:100%;display:flex;align-items:center;gap:12px}
.nav-side--start,.nav-side--end{flex:1 1 0;min-width:0;display:flex;align-items:center}
.nav-side--start{justify-content:flex-start}
.nav-side--end{justify-content:flex-end;gap:10px}
.brand{display:flex;align-items:center;gap:6px;text-decoration:none;color:inherit}
.brand-logos{display:flex;align-items:center;min-height:28px}
.brand-logo{height:28px;width:auto;max-width:180px;object-fit:contain;display:none}
.brand-logo--dark{display:block}
html[data-theme="light"] .brand-logo--dark{display:none}
html[data-theme="light"] .brand-logo--light{display:block}
.brand-name{font-weight:700;font-size:15px;letter-spacing:-0.02em}

.nav-mid{flex:0 0 auto;display:flex;align-items:center;gap:22px;font-size:13px;color:var(--text2)}
.nav-mid a{color:inherit;text-decoration:none;transition:color .2s}
.nav-mid a:hover{color:var(--text)}

.dd{position:relative}
.dd-trigger{cursor:default;display:inline-flex;align-items:center;gap:4px;user-select:none;font-weight:500}
.dd:hover .dd-trigger{color:var(--text)}
.dd-chevron{width:11px;height:11px;opacity:.75;transition:transform .2s}
.dd:hover .dd-chevron{transform:rotate(180deg)}
.dd-panel-wrap{
  position:absolute;left:50%;top:100%;transform:translateX(-50%);padding-top:8px;z-index:300;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .18s,visibility .18s,transform .18s;
  transform:translateX(-50%) translateY(-4px);
}
.dd:hover .dd-panel-wrap,.dd:focus-within .dd-panel-wrap{
  opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0);
}
.dd-panel{
  min-width:260px;padding:8px;border-radius:var(--radius);
  background:color-mix(in oklab,var(--bg-elev) 96%,transparent);
  backdrop-filter:blur(20px);
  border:1px solid var(--border-strong);
  box-shadow:var(--shadow-soft);
}
html[data-theme="light"] .dd-panel{background:rgba(255,255,255,.97)}
.dd-panel.dd-panel--tools{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:10px;
  width:min(1180px,calc(100vw - 28px));
  max-width:100%;
  padding:14px 16px;
  border-radius:var(--radius-lg);
  align-items:stretch;
}
@media (max-width:640px){
  .dd-panel.dd-panel--tools{grid-template-columns:repeat(2,minmax(0,1fr));}
}
.dd-panel.dd-panel--tools .dd-item{
  display:flex;flex-direction:row;align-items:flex-start;gap:12px;
  min-width:0;
  border-left:none;border-top:3px solid transparent;
  padding:14px 12px 12px;
  border-radius:12px;
}
.dd-panel.dd-panel--tools .dd-item:hover{background:var(--surf2)}
.dd-panel.dd-panel--tools .dd-item.is-active{
  background:var(--surf);
  border-top-color:var(--accent);
  box-shadow:var(--shadow-glow);
}
.dd-item-ico{
  flex-shrink:0;width:44px;height:44px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  background:oklch(68% 0.19 275 / 0.18);
  color:var(--accent);
}
.dd-item-body{display:flex;flex-direction:column;min-width:0;flex:1;gap:4px}
.dd-panel.dd-panel--tools .dd-item-title{font-size:14px;line-height:1.25;font-weight:600}
.dd-panel.dd-panel--tools .dd-item-hint{font-size:10px;margin-top:2px;line-height:1.3;color:var(--text3)}
.dd-item{display:block;padding:9px 11px;border-radius:8px;text-decoration:none;color:var(--text);transition:background .15s;border:none;width:100%;text-align:left;font:inherit;cursor:pointer;background:transparent}
.dd-item:hover{background:var(--surf2)}
.dd-item.is-active{background:var(--surf)}
.dd-tag{font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text3);padding:2px 6px;border-radius:6px;border:1px solid var(--border)}

.theme-bar{display:inline-flex;border:1px solid var(--border);border-radius:11px;overflow:hidden;background:var(--surf)}
.theme-bar button{
  border:none;background:transparent;color:var(--text2);font:inherit;font-size:12px;font-weight:600;padding:7px 13px;cursor:pointer;transition:color .15s,background .15s;
}
.theme-bar button:hover{color:var(--text);background:var(--surf2)}
.theme-bar button.active{background:var(--surf2);color:var(--text)}
.btn-cta{
  background:linear-gradient(135deg,var(--accent),oklch(58% 0.2 285));
  color:#fff;padding:8px 16px;border-radius:10px;font-size:13px;font-weight:600;
  text-decoration:none;white-space:nowrap;
  box-shadow:0 4px 16px oklch(68% 0.19 275 / 0.35);
  transition:transform .15s,box-shadow .15s,opacity .15s;
}
.btn-cta:hover{transform:translateY(-1px);opacity:.95}

.nav-mob{display:none}
@media (max-width:800px){
  .nav-mid{display:none !important}
  .nav-mob{display:block;position:relative;align-self:center;z-index:250}
  .nav-mob-sum{
    list-style:none;cursor:pointer;user-select:none;
    display:inline-flex;align-items:center;justify-content:center;
    padding:8px 14px;border-radius:10px;border:1px solid var(--border);
    font-size:12px;font-weight:600;color:var(--text2);background:var(--surf);
  }
  .nav-mob-sum::-webkit-details-marker{display:none}
  .nav-mob[open] .nav-mob-sum{color:var(--text);border-color:var(--border-strong)}
  .nav-mob-panel{
    position:absolute;right:0;top:calc(100% + 8px);min-width:min(260px,calc(100vw - 32px));
    padding:10px;border-radius:var(--radius);
    background:color-mix(in oklab,var(--bg-elev) 98%,transparent);
    backdrop-filter:blur(16px);
    border:1px solid var(--border-strong);
    box-shadow:var(--shadow-soft);
    display:flex;flex-direction:column;gap:2px;z-index:400;
  }
  .nav-mob-panel a{display:block;padding:11px 14px;border-radius:8px;text-decoration:none;color:var(--text);font-size:13px;font-weight:500}
  .nav-mob-panel a:hover{background:var(--surf2)}
}

/* ——— Page layout ——— */
.conv-main.tool-page{
  flex:1;
  max-width:min(920px,100%);
  width:100%;
  margin:0 auto;
  padding:32px 22px 56px;
}

/* Hero */
.tool-hero{
  position:relative;
  margin-bottom:28px;
  padding:28px 26px 26px;
  border-radius:var(--radius-lg);
  background:linear-gradient(145deg,color-mix(in oklab,var(--bg-elev) 88%,transparent),color-mix(in oklab,var(--surf) 50%,transparent));
  border:1px solid var(--border);
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}
.tool-hero::before{
  content:'';
  position:absolute;
  top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--accent),oklch(75% 0.15 310),var(--accent));
  opacity:.9;
}
html[data-theme="light"] .tool-hero{
  background:linear-gradient(145deg,#fff,color-mix(in oklab,#fff 92%,var(--accent) 4%));
}
.tool-hero-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:11px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.1em;
  color:var(--accent);
  margin-bottom:12px;
  padding:4px 10px;
  border-radius:999px;
  background:oklch(68% 0.19 275 / 0.12);
  border:1px solid oklch(68% 0.19 275 / 0.25);
}
.tool-hero h1{
  font-size:clamp(1.45rem,4vw,1.85rem);
  font-weight:700;
  letter-spacing:-0.035em;
  line-height:1.15;
  margin-bottom:10px;
  max-width:20ch;
}
.tool-hero-lead,.conv-head p.tool-hero-lead{
  font-size:15px;
  color:var(--text2);
  line-height:1.6;
  max-width:52ch;
}

/* Hub head (overview pages) */
.conv-head{margin-bottom:26px}
.conv-head h1{font-size:clamp(1.35rem,3.5vw,1.75rem);font-weight:700;letter-spacing:-0.03em;margin-bottom:10px}
.conv-head p{font-size:14px;color:var(--text2);line-height:1.6;max-width:56ch}

/* Hub quick links */
.tool-hub-links{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-bottom:24px;
}
.tool-hub-links a{
  display:inline-flex;
  align-items:center;
  padding:8px 14px;
  font-size:12px;
  font-weight:600;
  color:var(--text);
  text-decoration:none;
  border-radius:999px;
  background:var(--surf);
  border:1px solid var(--border);
  transition:background .15s,border-color .15s,transform .15s,box-shadow .15s;
}
.tool-hub-links a:hover{
  background:var(--surf2);
  border-color:oklch(68% 0.19 275 / 0.35);
  box-shadow:0 0 0 1px oklch(68% 0.19 275 / 0.15);
  transform:translateY(-1px);
}

/* Glass panel */
.tool-panel,.conv-card{
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  background:color-mix(in oklab,var(--bg-elev) 75%,transparent);
  backdrop-filter:blur(12px);
  padding:24px 22px 26px;
  margin-bottom:20px;
  box-shadow:var(--shadow-soft);
}
html[data-theme="light"] .tool-panel,html[data-theme="light"] .conv-card{
  background:rgba(255,255,255,.82);
}

.tool-panel-head{
  display:flex;
  align-items:flex-start;
  gap:14px;
  margin-bottom:18px;
}
.tool-panel-head--tight{margin-bottom:12px}
.tool-panel-step{
  flex-shrink:0;
  width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;
  border-radius:10px;
  font-size:13px;font-weight:800;
  color:var(--accent);
  background:oklch(68% 0.19 275 / 0.15);
  border:1px solid oklch(68% 0.19 275 / 0.3);
}
.tool-panel-title{
  font-size:15px;
  font-weight:700;
  letter-spacing:-0.02em;
}
.tool-panel-hint,.tool-hint{
  font-size:13px;
  color:var(--text2);
  line-height:1.55;
  margin-top:4px;
  max-width:60ch;
}

/* Dropzone */
.tool-dropzone-wrap{margin-bottom:8px}
.tool-dropzone{
  position:relative;
  border-radius:var(--radius);
  transition:border-color .2s,background .2s,box-shadow .2s,transform .2s;
}
.tool-dropzone-hit{
  position:relative;
  min-height:168px;
  border-radius:var(--radius);
  border:2px dashed color-mix(in oklab,var(--border-strong) 70%,var(--accent) 30%);
  background:linear-gradient(180deg,var(--surf),transparent);
  transition:border-color .2s,background .2s,box-shadow .2s,transform .2s;
}
.tool-dropzone:hover .tool-dropzone-hit{
  border-color:oklch(68% 0.19 275 / 0.45);
  background:oklch(68% 0.19 275 / 0.06);
}
.tool-dropzone.is-dragover .tool-dropzone-hit{
  border-style:solid;
  border-color:var(--accent);
  box-shadow:0 0 0 4px oklch(68% 0.19 275 / 0.12),var(--shadow-glow);
  transform:scale(1.01);
}
.tool-dropzone:focus-visible .tool-dropzone-hit{
  outline:2px solid var(--accent);
  outline-offset:3px;
}
.tool-file-input-native{
  position:absolute;
  opacity:0;
  width:100%;
  height:100%;
  inset:0;
  cursor:pointer;
  font-size:0;
  z-index:2;
}
.tool-dropzone-ui{
  position:relative;
  z-index:1;
  pointer-events:none;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:36px 20px 28px;
  gap:6px;
}
.tool-dropzone.has-files .tool-dropzone-ui{padding-bottom:20px}
.tool-dropzone-icon{
  width:48px;height:48px;
  margin-bottom:4px;
  border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  background:oklch(68% 0.19 275 / 0.14);
  color:var(--accent);
}
.tool-dropzone-icon svg{width:24px;height:24px}
.tool-dropzone-title{font-size:15px;font-weight:700;letter-spacing:-0.02em}
.tool-dropzone-sub{font-size:13px;color:var(--text2)}

.tool-file-list{
  position:relative;
  z-index:1;
  list-style:none;
  padding:0 14px 14px;
  margin:0;
  display:flex;
  flex-direction:column;
  gap:8px;
  max-height:200px;
  overflow-y:auto;
}
.tool-file-list:not([data-has-files]){display:none}
.tool-file-chip{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 12px;
  border-radius:10px;
  background:var(--surf);
  border:1px solid var(--border);
  font-size:12px;
}
.tool-file-chip-ico{color:var(--accent);flex-shrink:0;display:flex}
.tool-file-chip-name{flex:1;min-width:0;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tool-file-chip-size{flex-shrink:0;font-family:var(--mono);font-size:11px;color:var(--text3)}

/* Options block */
.tool-options-block{
  margin-top:22px;
  padding-top:22px;
  border-top:1px solid var(--border);
}
.tool-section-head{
  display:flex;
  align-items:center;
  gap:12px;
  margin-bottom:16px;
}
.tool-section-head .tool-panel-step{width:28px;height:28px;font-size:12px}
.tool-options-headline{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text3)}

.tool-options-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:16px;
}
.tool-field{display:flex;flex-direction:column;gap:8px}
.tool-field-label{
  font-size:11px;
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:.08em;
  color:var(--text3);
}
.tool-micro-label{font-size:11px;color:var(--text2);margin-bottom:4px;display:block}
.tool-input,.tool-field select{
  width:100%;
  font:inherit;
  font-size:14px;
  padding:12px 14px;
  border-radius:11px;
  border:1px solid var(--border-strong);
  background:color-mix(in oklab,var(--bg) 65%,transparent);
  color:var(--text);
  transition:border-color .15s,box-shadow .15s;
}
html[data-theme="light"] .tool-input,html[data-theme="light"] .tool-field select{background:#fff}
.tool-input:hover,.tool-field select:hover{border-color:oklch(68% 0.19 275 / 0.35)}
.tool-input:focus,.tool-field select:focus{
  outline:none;
  border-color:var(--accent);
  box-shadow:0 0 0 3px oklch(68% 0.19 275 / 0.18);
}
.tool-field-check{
  display:flex;
  align-items:flex-start;
  gap:10px;
  margin-top:12px;
  font-size:13px;
  color:var(--text2);
  line-height:1.45;
  cursor:pointer;
}
.tool-field-check input{
  margin-top:3px;
  flex-shrink:0;
  accent-color:var(--accent);
}

.tool-field-split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
@media (max-width:520px){
  .tool-field-split{grid-template-columns:1fr}
}

/* Tool picker grid (hub) */
.conv-card-kicker,.tool-picker-kicker{
  font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--text3);margin-bottom:10px
}
.tool-pick-grid{
  display:grid;
  gap:10px;
  grid-template-columns:repeat(auto-fill,minmax(168px,1fr));
  margin-bottom:8px;
}
.tool-pick{
  position:relative;
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:var(--surf);
  padding:14px 16px;
  text-align:left;
  font:inherit;
  font-size:13px;
  font-weight:600;
  cursor:pointer;
  color:var(--text);
  transition:transform .15s,background .15s,border-color .15s,box-shadow .15s;
}
.tool-pick:hover{
  background:var(--surf2);
  border-color:oklch(68% 0.19 275 / 0.25);
  transform:translateY(-2px);
  box-shadow:0 8px 24px rgba(0,0,0,0.2);
}
html[data-theme="light"] .tool-pick:hover{box-shadow:0 8px 24px rgba(15,25,55,0.08)}
.tool-pick.is-active{
  border-color:var(--accent);
  background:oklch(68% 0.19 275 / 0.1);
  box-shadow:var(--shadow-glow);
}

/* Actions */
.tool-actions-bar,.conv-actions{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px;
  margin-top:22px;
  padding-top:20px;
  border-top:1px solid var(--border);
}
.btn-sm{
  border:1px solid var(--border);
  background:var(--surf);
  color:var(--text2);
  padding:11px 20px;
  border-radius:11px;
  font-size:14px;
  font-weight:600;
  cursor:pointer;
  font-family:inherit;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  transition:color .15s,background .15s,border-color .15s,transform .12s;
}
.btn-sm:hover:not(:disabled){
  color:var(--text);
  background:var(--surf2);
  border-color:oklch(68% 0.19 275 / 0.35);
}
.btn-sm:active:not(:disabled){transform:scale(0.98)}
.btn-sm:disabled{opacity:.45;cursor:not-allowed}
.btn-sm.primary{
  border:none;
  background:linear-gradient(135deg,var(--accent),oklch(58% 0.2 285));
  color:#fff;
  box-shadow:0 4px 20px oklch(68% 0.19 275 / 0.35);
}
.btn-sm.primary:hover:not(:disabled){
  opacity:.95;
  box-shadow:0 6px 28px oklch(68% 0.19 275 / 0.42);
}

/* Status */
.tool-status,.conv-status{
  margin-top:16px;
  padding:14px 16px;
  border-radius:var(--radius);
  font-size:14px;
  line-height:1.45;
  min-height:3.25rem;
  display:flex;
  align-items:center;
  border:1px solid var(--border);
  background:var(--surf);
}
.tool-status:empty,.conv-status:empty{min-height:0;padding:0;border:none;background:transparent}
.tool-status.ok,.conv-status.ok{
  border-color:oklch(72% 0.14 156 / 0.4);
  background:oklch(72% 0.14 156 / 0.1);
  color:var(--ok);
}
.tool-status.err,.conv-status.err{
  border-color:oklch(70% 0.2 25 / 0.4);
  background:oklch(70% 0.2 25 / 0.1);
  color:var(--err);
}
html[data-theme="light"] .tool-status.err,html[data-theme="light"] .conv-status.err{color:#b00020}

.meta-pre{
  display:none;
  font-family:var(--mono);
  font-size:12px;
  line-height:1.5;
  white-space:pre-wrap;
  background:color-mix(in oklab,var(--bg) 80%,transparent);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:16px;
  margin-top:16px;
  max-height:320px;
  overflow:auto;
}

.preview-wrap{margin-top:18px}
.preview{
  max-width:100%;
  max-height:360px;
  border-radius:var(--radius);
  border:1px solid var(--border);
  display:none;
  object-fit:contain;
  background:var(--surf);
  box-shadow:var(--shadow-soft);
}

.conv-foot{
  margin-top:12px;
  font-size:13px;
  color:var(--text3);
  line-height:1.55;
}
.conv-foot a{
  color:var(--accent);
  font-weight:600;
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .15s;
}
.conv-foot a:hover{border-bottom-color:var(--accent)}

/* Legacy rows (fallback) */
.tool-form-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:14px}
.tool-form-row input[type=file]{font-size:13px;flex:1;min-width:200px}

@media (max-width:480px){
  .conv-main.tool-page,.conv-main{padding:22px 16px 44px}
  .tool-hero{padding:22px 18px}
}