/* ================================================================
   Base64 Image Converter — Main Stylesheet
   Fonts: Outfit (display) + JetBrains Mono (code)
   Icons: Flaticon UIcons (fi fi-rr-* / fi fi-brands-*)
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── Reset ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;tab-size:4}
img,svg,video{display:block;max-width:100%}
button,input,textarea,select{font:inherit}
a{color:inherit;text-decoration:none}

/* ── Design tokens ── */
:root{
  --f-sans:'Outfit',system-ui,sans-serif;
  --f-mono:'JetBrains Mono','Fira Code',monospace;

  /* Palette */
  --c-bg:#f8f9fc;
  --c-bg-alt:#ffffff;
  --c-surface:#ffffff;
  --c-surface-2:#f1f5f9;
  --c-border:#e2e8f0;
  --c-border-2:#cbd5e1;

  --c-text:#0f172a;
  --c-text-2:#475569;
  --c-text-3:#94a3b8;

  --c-blue-700:#1d4ed8;
  --c-blue-600:#2563eb;
  --c-blue-500:#3b82f6;
  --c-blue-400:#60a5fa;
  --c-blue-100:#dbeafe;
  --c-blue-50:#eff6ff;

  --c-indigo-600:#4f46e5;
  --c-violet-600:#7c3aed;

  --c-green-700:#15803d;
  --c-green-600:#16a34a;
  --c-green-100:#dcfce7;
  --c-green-50:#f0fdf4;

  --c-red-600:#dc2626;
  --c-red-100:#fee2e2;
  --c-red-50:#fef2f2;

  --c-amber-500:#f59e0b;

  --c-header:#0f172a;

  /* Radii */
  --r-xs:4px;--r-sm:6px;--r-md:10px;--r-lg:14px;--r-xl:20px;--r-2xl:28px;--r-full:9999px;

  /* Shadows */
  --sh-xs:0 1px 2px rgba(15,23,42,.05);
  --sh-sm:0 1px 3px rgba(15,23,42,.08),0 1px 2px rgba(15,23,42,.06);
  --sh-md:0 4px 8px rgba(15,23,42,.08),0 2px 4px rgba(15,23,42,.05);
  --sh-lg:0 10px 24px rgba(15,23,42,.1),0 4px 8px rgba(15,23,42,.06);
  --sh-xl:0 20px 40px rgba(15,23,42,.12);

  /* Transitions */
  --t:150ms cubic-bezier(.4,0,.2,1);
  --t-bounce:220ms cubic-bezier(.34,1.56,.64,1);
  --t-slow:300ms cubic-bezier(.4,0,.2,1);

  /* Layout */
  --max-w:940px;
  --max-w-sm:740px;
  --gap:1.5rem;
}

/* ── Base ── */
body{
  font-family:var(--f-sans);
  background:var(--c-bg);
  color:var(--c-text);
  min-height:100vh;
  display:flex;flex-direction:column;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.5;
}
main{flex:1}
.wrap{max-width:var(--max-w);margin:0 auto;padding:0 1.25rem}
.wrap-sm{max-width:var(--max-w-sm);margin:0 auto;padding:0 1.25rem}

/* Icon sizing helpers */
.fi{font-size:1em;line-height:1;vertical-align:middle}
.fi-lg{font-size:1.2em}
.fi-xl{font-size:1.5em}

/* ── Header ── */
.site-header{
  background:var(--c-header);
  position:sticky;top:0;z-index:200;
  border-bottom:1px solid rgba(255,255,255,.06);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
}
.header-inner{
  max-width:var(--max-w);margin:0 auto;padding:0 1.25rem;
  height:60px;display:flex;align-items:center;
  justify-content:space-between;gap:1rem;
}
.site-logo{
  display:flex;align-items:center;gap:.625rem;
  font-weight:700;font-size:.9375rem;letter-spacing:-.025em;
  color:#fff;flex-shrink:0;
  transition:opacity var(--t);
}
.site-logo:hover{opacity:.82}
.site-logo img{width:32px;height:32px;border-radius:8px;object-fit:contain;}
.site-logo span{white-space:nowrap}

.site-nav{display:flex;align-items:center;gap:.2rem}
.nav-link{
  display:flex;align-items:center;gap:.35rem;
  padding:.4rem .8rem;border-radius:var(--r-sm);
  font-size:.8125rem;font-weight:500;
  color:rgba(255,255,255,.6);
  transition:color var(--t),background var(--t);
  white-space:nowrap;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.09)}
.nav-link.active{color:#fff;background:rgba(255,255,255,.13);font-weight:600}
.nav-github{
  border:1px solid rgba(255,255,255,.18) !important;
  border-radius:var(--r-sm);
  color:rgba(255,255,255,.75) !important;
  padding:.38rem .85rem !important;
}
.nav-github:hover{border-color:rgba(255,255,255,.45)!important;color:#fff!important;background:transparent!important}
.nav-github .gh-label{display:none}
@media(min-width:540px){.nav-github .gh-label{display:inline}}

/* ── Hero ── */
.hero{
  padding:3.5rem 0 2.5rem;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:'';
  position:absolute;inset:0;
  background:radial-gradient(ellipse 90% 55% at 50% -5%,rgba(37,99,235,.09) 0%,transparent 65%);
  pointer-events:none;
}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:.4rem;
  background:var(--c-blue-50);border:1px solid var(--c-blue-100);
  color:var(--c-blue-700);border-radius:var(--r-full);
  padding:.28rem .9rem;
  font-size:.7375rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;
  margin-bottom:1.2rem;
}
.hero h1{
  font-size:clamp(1.875rem,5vw,2.875rem);
  font-weight:900;letter-spacing:-.04em;line-height:1.08;
  margin-bottom:.9rem;
  background:linear-gradient(155deg,#0f172a 0%,#334155 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
  background-clip:text;
}
.hero-desc{
  font-size:1.0625rem;color:var(--c-text-2);
  max-width:480px;margin:0 auto 1.6rem;line-height:1.65;
}
.hero-chips{
  display:flex;align-items:center;justify-content:center;
  gap:.5rem;flex-wrap:wrap;
}
.chip{
  display:inline-flex;align-items:center;gap:.35rem;
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-full);padding:.28rem .85rem;
  font-size:.75rem;font-weight:500;color:var(--c-text-2);
  box-shadow:var(--sh-xs);
}
.chip-dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--c-green-600);flex-shrink:0;
  box-shadow:0 0 0 2px rgba(22,163,74,.2);
}

/* ── Card ── */
.card{
  background:var(--c-surface);
  border:1px solid var(--c-border);
  border-radius:var(--r-xl);
  box-shadow:var(--sh-md);
  padding:1.875rem;
  margin-bottom:1.75rem;
  position:relative;
  overflow:hidden;
  transition:box-shadow var(--t);
}
.card:focus-within{box-shadow:var(--sh-lg)}
.card-accent-bar{
  position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--c-blue-600),var(--c-indigo-600),var(--c-violet-600));
  border-radius:var(--r-xl) var(--r-xl) 0 0;
}
.card-header{
  display:flex;align-items:center;gap:.75rem;
  margin-bottom:1.5rem;
}
.card-icon{
  width:36px;height:36px;flex-shrink:0;
  background:var(--c-blue-50);border:1px solid var(--c-blue-100);
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  color:var(--c-blue-600);font-size:1.05rem;
}
.card-title{font-size:1.0625rem;font-weight:700;letter-spacing:-.02em}
.card-subtitle{font-size:.8125rem;color:var(--c-text-3);margin-top:.1rem}

/* ── Form fields ── */
.field{margin-bottom:1.1rem}
.field-header{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:.5rem;
}
.field-label{
  font-size:.75rem;font-weight:700;
  color:var(--c-text-3);
  text-transform:uppercase;letter-spacing:.07em;
}
.field-hint{font-size:.75rem;color:var(--c-text-3)}
.kbd{
  display:inline-flex;align-items:center;
  background:var(--c-surface-2);border:1px solid var(--c-border-2);
  border-bottom-width:2px;border-radius:var(--r-xs);
  padding:.08rem .4rem;font-family:var(--f-mono);
  font-size:.7rem;color:var(--c-text-2);line-height:1.6;
}
textarea{
  width:100%;min-height:136px;
  font-family:var(--f-mono);font-size:.8125rem;
  border:1.5px solid var(--c-border);border-radius:var(--r-md);
  padding:.875rem 1rem;background:var(--c-surface-2);
  color:var(--c-text);resize:vertical;outline:none;
  transition:border-color var(--t),background var(--t),box-shadow var(--t);
  line-height:1.65;
}
textarea:focus{
  border-color:var(--c-blue-500);
  background:#fff;
  box-shadow:0 0 0 3px rgba(59,130,246,.12);
}
textarea::placeholder{color:var(--c-text-3)}
textarea[readonly]{cursor:default;background:var(--c-surface-2)}
textarea[readonly]:focus{
  border-color:var(--c-border);
  box-shadow:none;
  background:var(--c-surface-2);
}

/* ── Buttons ── */
.btns{display:flex;gap:.6rem;flex-wrap:wrap;margin:1rem 0;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.575rem 1.15rem;border-radius:var(--r-md);
  font-size:.875rem;font-weight:600;font-family:var(--f-sans);
  cursor:pointer;border:1.5px solid transparent;
  transition:background var(--t),border-color var(--t),color var(--t),box-shadow var(--t),transform var(--t);
  white-space:nowrap;user-select:none;
  text-decoration:none!important;
}
.btn:active{transform:scale(.97)}
.btn:disabled{opacity:.38;cursor:not-allowed;transform:none!important;pointer-events:none}
.btn:focus-visible{outline:2px solid var(--c-blue-500);outline-offset:2px}

.btn-primary{background:var(--c-blue-600);color:#fff;box-shadow:0 1px 3px rgba(37,99,235,.28);}
.btn-primary:hover{background:var(--c-blue-700);box-shadow:0 4px 14px rgba(37,99,235,.38);}
.btn-secondary{background:transparent;color:var(--c-text);border-color:var(--c-border);}
.btn-secondary:hover{background:var(--c-surface-2);border-color:var(--c-border-2);}
.btn-ghost{background:transparent;color:var(--c-text-2);border-color:transparent;padding-left:.6rem;padding-right:.6rem;}
.btn-ghost:hover{background:var(--c-surface-2);color:var(--c-text);}
.btn-success{background:var(--c-green-600);color:#fff;}
.btn-success:hover{background:var(--c-green-700);}

.btn .fi{font-size:1em}

/* ── Drop zone ── */
.dropzone{
  border:2px dashed var(--c-border-2);
  border-radius:var(--r-xl);
  padding:3rem 1.5rem;
  text-align:center;
  cursor:pointer;
  position:relative;
  transition:border-color var(--t),background var(--t),box-shadow var(--t);
  background:var(--c-surface-2);
  outline:none;
}
.dropzone:hover,.dropzone:focus-within{
  border-color:var(--c-blue-400);
  background:var(--c-blue-50);
}
.dropzone.drag-over{
  border-color:var(--c-blue-500);
  background:var(--c-blue-50);
  box-shadow:0 0 0 4px rgba(59,130,246,.1);
}
.dropzone input[type=file]{
  position:absolute;inset:0;opacity:0;
  cursor:pointer;width:100%;height:100%;
}
.dz-icon-wrap{
  width:56px;height:56px;
  background:var(--c-surface);border:1.5px solid var(--c-border);
  border-radius:var(--r-lg);
  display:flex;align-items:center;justify-content:center;
  margin:0 auto .875rem;
  color:var(--c-text-3);font-size:1.5rem;
  box-shadow:var(--sh-xs);
  transition:transform var(--t-bounce),border-color var(--t);
}
.dropzone:hover .dz-icon-wrap,.dropzone:focus-within .dz-icon-wrap{
  transform:translateY(-3px);
  border-color:var(--c-blue-400);
  color:var(--c-blue-600);
}
.dz-title{font-size:.9375rem;font-weight:600;margin-bottom:.3rem}
.dz-sub{font-size:.8rem;color:var(--c-text-3)}
.dz-link{color:var(--c-blue-600);font-weight:600}
.dz-thumb{
  width:100%;
  max-height:420px;
  border-radius:var(--r-lg);
  border:1px solid var(--c-border);
  object-fit:contain;
  margin:1.25rem 0 0;
  display:none;
  box-shadow:var(--sh-md);
  background:repeating-conic-gradient(var(--c-surface-2) 0% 25%,var(--c-surface) 0% 50%) 0 0/16px 16px;
  cursor:pointer;
  transition:opacity var(--t),box-shadow var(--t);
}
.dz-thumb:hover{
  opacity:.93;
  box-shadow:var(--sh-lg);
}

/* ── Format toggle ── */
.fmt-toggle{
  display:inline-flex;
  border:1.5px solid var(--c-border);
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--c-surface-2);
  margin:.6rem 0;
}
.fmt-toggle label{
  display:flex;align-items:center;gap:.35rem;
  padding:.45rem 1rem;
  font-size:.8125rem;font-weight:500;
  color:var(--c-text-2);cursor:pointer;
  transition:background var(--t),color var(--t);
  user-select:none;border:none;
}
.fmt-toggle label.active{
  background:var(--c-surface);
  color:var(--c-text);
  font-weight:600;
  box-shadow:var(--sh-xs);
}
.fmt-toggle input[type=radio]{display:none}

/* ── Preview ── */
.preview-header{
  display:flex;justify-content:space-between;align-items:center;
  margin-bottom:.5rem;
}
.preview-format-badge{
  display:none;
  align-items:center;gap:.35rem;
  background:var(--c-surface-2);border:1px solid var(--c-border);
  border-radius:var(--r-xs);padding:.18rem .55rem;
  font-family:var(--f-mono);font-size:.7375rem;
  color:var(--c-text-2);font-weight:500;
}
.preview-format-badge.visible{display:inline-flex}
.preview-area{
  border:1.5px dashed var(--c-border);
  border-radius:var(--r-lg);
  min-height:220px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  overflow:hidden;
  background:var(--c-surface-2);
  position:relative;
  transition:border-color var(--t),background var(--t);
}
.preview-area.loaded{
  border-style:solid;border-color:var(--c-border);
  background:#fff;min-height:unset;
}
.preview-empty{
  text-align:center;color:var(--c-text-3);
  padding:2.5rem 1.5rem;
  pointer-events:none;
}
.preview-empty i{font-size:2.75rem;display:block;margin-bottom:.875rem;opacity:.35}
.preview-empty p{font-size:.875rem;color:var(--c-text-2);margin-bottom:.25rem}
.preview-empty small{font-size:.75rem}
.preview-area img{
  max-width:100%;max-height:520px;
  display:block;margin:1.25rem auto;
  border-radius:var(--r-sm);
}
.img-meta-bar{
  display:none;
  width:100%;
  background:var(--c-surface-2);
  border-top:1px solid var(--c-border);
  padding:.55rem 1rem;
  font-size:.74rem;font-family:var(--f-mono);
  color:var(--c-text-2);gap:1.25rem;flex-wrap:wrap;
  align-items:center;
}
.img-meta-bar.visible{display:flex}
.img-meta-bar span{display:flex;align-items:center;gap:.35rem}
.img-meta-bar .fi{color:var(--c-text-3);font-size:.875rem}

/* ── Error / status ── */
.msg-box{
  display:none;align-items:flex-start;gap:.6rem;
  border-radius:var(--r-md);padding:.7rem .9rem;
  font-size:.8125rem;line-height:1.5;margin-top:.75rem;
}
.msg-box.visible{display:flex}
.msg-box i{font-size:1rem;flex-shrink:0;margin-top:.05em}
.msg-error{background:var(--c-red-50);border:1px solid var(--c-red-100);color:var(--c-red-600)}
.msg-success{background:var(--c-green-50);border:1px solid var(--c-green-100);color:var(--c-green-700)}

/* ── Char count ── */
.char-count{
  font-size:.74rem;color:var(--c-text-3);
  text-align:right;margin-top:.4rem;
  font-family:var(--f-mono);
}

/* ── Divider ── */
.divider{height:1px;background:var(--c-border);margin:.75rem 0 1.25rem}

/* ── Toast ── */
#toast{
  position:fixed;bottom:1.5rem;left:50%;
  transform:translateX(-50%) translateY(calc(100% + 2.5rem));
  background:#0f172a;color:#fff;
  padding:.65rem 1.3rem;
  border-radius:var(--r-lg);
  font-size:.875rem;font-weight:500;
  box-shadow:var(--sh-xl);
  transition:transform var(--t-bounce);
  z-index:9999;white-space:nowrap;
  pointer-events:none;
  border:1px solid rgba(255,255,255,.1);
  display:flex;align-items:center;gap:.5rem;
}
#toast.show{transform:translateX(-50%) translateY(0)}
#toast i{font-size:1rem}

/* ── Features grid ── */
.features{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:1rem;margin-bottom:1.5rem;
}
.feat-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-xl);padding:1.35rem;
  box-shadow:var(--sh-xs);
  transition:box-shadow var(--t),transform var(--t);
}
.feat-card:hover{box-shadow:var(--sh-md);transform:translateY(-2px)}
.feat-icon{
  width:40px;height:40px;
  background:var(--c-blue-50);border:1px solid var(--c-blue-100);
  border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  color:var(--c-blue-600);font-size:1.1rem;
  margin-bottom:.875rem;
}
.feat-card h3{font-size:.9375rem;font-weight:700;margin-bottom:.3rem;letter-spacing:-.015em}
.feat-card p{font-size:.8125rem;color:var(--c-text-2);line-height:1.6}

/* ── Steps ── */
.steps{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(210px,1fr));
  gap:1rem;
}
.step-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-xl);padding:1.35rem;
  box-shadow:var(--sh-xs);position:relative;
}
.step-num{
  width:36px;height:36px;
  background:linear-gradient(135deg,var(--c-blue-600),var(--c-indigo-600));
  color:#fff;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:.875rem;
  margin-bottom:.875rem;
  box-shadow:0 2px 10px rgba(37,99,235,.32);
}
.step-card h3{font-size:.9375rem;font-weight:700;margin-bottom:.3rem;letter-spacing:-.015em}
.step-card p{font-size:.8125rem;color:var(--c-text-2);line-height:1.6}

/* ── FAQ ── */
.faq{display:flex;flex-direction:column;gap:.65rem;margin-bottom:2.5rem}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-xl);overflow:hidden;
  box-shadow:var(--sh-xs);
  transition:box-shadow var(--t);
}
.faq-item:hover{box-shadow:var(--sh-sm)}
.faq-q{
  width:100%;text-align:left;
  padding:1.05rem 1.25rem;
  background:none;border:none;cursor:pointer;
  font-family:var(--f-sans);font-size:.9375rem;font-weight:600;
  color:var(--c-text);
  display:flex;justify-content:space-between;align-items:center;gap:.75rem;
  letter-spacing:-.015em;
  transition:background var(--t);
}
.faq-q:hover{background:var(--c-surface-2)}
.faq-q:focus-visible{outline:2px solid var(--c-blue-500);outline-offset:-2px}
.faq-chevron{
  color:var(--c-text-3);font-size:.9rem;flex-shrink:0;
  transition:transform var(--t-slow),color var(--t);
}
.faq-item.open .faq-chevron{transform:rotate(180deg);color:var(--c-blue-600)}
.faq-body{
  max-height:0;overflow:hidden;
  transition:max-height var(--t-slow) ease;
}
.faq-ans{
  padding:0 1.25rem 1.1rem;
  font-size:.875rem;color:var(--c-text-2);line-height:1.75;
  border-top:1px solid var(--c-border);
  padding-top:.875rem;
}
.faq-ans a{color:var(--c-blue-600)}
.faq-ans a:hover{text-decoration:underline}
.faq-item.open .faq-body{max-height:600px}

/* ── Section head ── */
.section-head{text-align:center;margin-bottom:1.75rem}
.section-head h2{font-size:1.625rem;font-weight:800;letter-spacing:-.035em;margin-bottom:.4rem}
.section-head p{font-size:.9375rem;color:var(--c-text-2);max-width:460px;margin:0 auto}
section{padding:1.5rem 0}

/* ── Prose (legal) ── */
.prose-page{padding:2.5rem 0 3.5rem}
.prose-card{
  background:var(--c-surface);border:1px solid var(--c-border);
  border-radius:var(--r-2xl);box-shadow:var(--sh-md);
  padding:2.5rem 3rem;
}
.prose-card h1{font-size:2.125rem;font-weight:900;letter-spacing:-.045em;margin-bottom:.3rem}
.prose-meta{font-size:.8125rem;color:var(--c-text-3);margin-bottom:2.25rem;font-family:var(--f-mono)}
.prose-meta a{color:var(--c-blue-600)}
.prose-card h2{
  font-size:1.0625rem;font-weight:700;letter-spacing:-.02em;
  margin:2.25rem 0 .6rem;
  padding-top:2rem;border-top:1px solid var(--c-border);
}
.prose-card>h2:first-of-type{border-top:none;padding-top:0;margin-top:0}
.prose-card h3{font-size:.9375rem;font-weight:600;margin:1.25rem 0 .4rem}
.prose-card p{font-size:.9375rem;line-height:1.8;color:var(--c-text-2);margin-bottom:.75rem}
.prose-card ul{list-style:none;padding:0;margin:.4rem 0 1rem}
.prose-card ul li{
  font-size:.9375rem;color:var(--c-text-2);line-height:1.75;
  padding:.2rem 0 .2rem 1.5rem;position:relative;
}
.prose-card ul li::before{content:'—';position:absolute;left:0;color:var(--c-text-3)}
.prose-card a{color:var(--c-blue-600)}
.prose-card a:hover{text-decoration:underline}
.callout{
  background:var(--c-blue-50);border-left:3px solid var(--c-blue-500);
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  padding:.875rem 1.1rem;font-size:.875rem;
  color:#1e3a8a;margin:1.35rem 0;line-height:1.65;
}

/* ── 404 ── */
.page-404{
  flex:1;display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  padding:5rem 2rem;text-align:center;
}
.e404-num{
  font-size:9rem;font-weight:900;letter-spacing:-.06em;line-height:1;
  color:var(--c-surface-2);margin-bottom:.3rem;
  -webkit-text-stroke:2px var(--c-border-2);
}
.page-404 h1{font-size:1.5rem;font-weight:700;margin-bottom:.5rem;letter-spacing:-.02em}
.page-404 p{color:var(--c-text-2);margin-bottom:2rem}

/* ── Footer ── */
.site-footer{
  background:var(--c-header);
  border-top:1px solid rgba(255,255,255,.04);
  color:rgba(255,255,255,.4);font-size:.8125rem;
}
.footer-inner{
  max-width:var(--max-w);margin:0 auto;padding:1.25rem;
  display:flex;align-items:center;justify-content:space-between;
  flex-wrap:wrap;gap:.75rem;
}
.footer-inner a{color:rgba(255,255,255,.4);transition:color var(--t)}
.footer-inner a:hover{color:rgba(255,255,255,.8)}
.footer-links{display:flex;gap:1.35rem;align-items:center}

/* ── Responsive ── */
@media(max-width:680px){
  .hero{padding:2.5rem 0 2rem}
  .hero h1{font-size:1.875rem}
  .card{padding:1.25rem}
  .prose-card{padding:1.5rem}
  .prose-card h1{font-size:1.625rem}
}
@media(max-width:500px){
  .btns{flex-direction:column}
  .btn{width:100%;justify-content:center}
  .features{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .site-logo span{display:none}
}

/* ── Donation / tip button ── */
.nav-tip{
  display:flex;align-items:center;gap:.35rem;
  padding:.38rem .8rem;
  border-radius:var(--r-sm);
  font-size:.8rem;font-weight:600;
  background:linear-gradient(135deg,#f59e0b,#ef4444);
  color:#fff!important;
  border:none;
  transition:opacity var(--t),transform var(--t),box-shadow var(--t);
  box-shadow:0 1px 4px rgba(239,68,68,.3);
  white-space:nowrap;
  text-decoration:none!important;
}
.nav-tip:hover{opacity:.88;transform:translateY(-1px);box-shadow:0 4px 12px rgba(239,68,68,.35)}
.nav-tip span{display:none}
@media(min-width:600px){.nav-tip span{display:inline}}

/* ── App hub page ── */
.hub-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:1.5rem;
  margin:2rem 0;
}
.hub-card{
  background:var(--c-surface);
  border:1.5px solid var(--c-border);
  border-radius:var(--r-2xl);
  padding:2rem;
  box-shadow:var(--sh-md);
  display:flex;flex-direction:column;gap:1rem;
  transition:box-shadow var(--t),transform var(--t),border-color var(--t);
  text-decoration:none!important;color:var(--c-text);
  position:relative;overflow:hidden;
}
.hub-card::before{
  content:'';
  position:absolute;top:0;left:0;right:0;height:4px;
  background:var(--hub-accent,linear-gradient(90deg,var(--c-blue-600),var(--c-indigo-600)));
  border-radius:var(--r-2xl) var(--r-2xl) 0 0;
}
.hub-card:hover{box-shadow:var(--sh-lg);transform:translateY(-3px);border-color:var(--c-border-2)}
.hub-card-icon{
  width:52px;height:52px;
  border-radius:var(--r-lg);
  display:flex;align-items:center;justify-content:center;
  font-size:1.5rem;flex-shrink:0;
}
.hub-card-icon.blue{background:var(--c-blue-50);color:var(--c-blue-600);border:1px solid var(--c-blue-100)}
.hub-card-icon.indigo{background:#eef2ff;color:#4338ca;border:1px solid #c7d2fe}
.hub-card h2{font-size:1.1875rem;font-weight:700;letter-spacing:-.025em;margin:0}
.hub-card p{font-size:.875rem;color:var(--c-text-2);line-height:1.65;margin:0;flex:1}
.hub-card-arrow{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:.875rem;font-weight:600;color:var(--c-blue-600);
  margin-top:.25rem;
}
.hub-donate{
  background:linear-gradient(135deg,#fef3c7,#fee2e2);
  border:1.5px solid #fcd34d;
  border-radius:var(--r-2xl);
  padding:1.5rem 2rem;
  display:flex;align-items:center;gap:1rem;
  flex-wrap:wrap;
  margin-top:.5rem;
}
.hub-donate-text{flex:1;min-width:200px}
.hub-donate-text h3{font-size:1rem;font-weight:700;margin-bottom:.25rem}
.hub-donate-text p{font-size:.8125rem;color:var(--c-text-2);margin:0;line-height:1.5}
.btn-donate{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.6rem 1.4rem;border-radius:var(--r-full);
  font-size:.875rem;font-weight:700;
  background:linear-gradient(135deg,#f59e0b,#ef4444);
  color:#fff;border:none;cursor:pointer;
  box-shadow:0 2px 10px rgba(239,68,68,.3);
  transition:opacity var(--t),transform var(--t-bounce),box-shadow var(--t);
  text-decoration:none!important;white-space:nowrap;
}
.btn-donate:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 6px 18px rgba(239,68,68,.35)}

/* ── App page breadcrumb ── */
.breadcrumb{
  display:flex;align-items:center;gap:.4rem;
  font-size:.8125rem;color:var(--c-text-3);
  padding:.75rem 0;margin-bottom:.25rem;
}
.breadcrumb a{color:var(--c-text-3);transition:color var(--t)}
.breadcrumb a:hover{color:var(--c-blue-600)}
.breadcrumb i{font-size:.7rem;color:var(--c-text-3)}
.breadcrumb span{color:var(--c-text-2);font-weight:500}

/* ── Blob URL preview link ── */
#blob-link-wrap{
  display:none;
  margin:.75rem 0 0;
}
.blob-link{
  display:flex;align-items:center;gap:.5rem;
  background:var(--c-surface-2);
  border:1px solid var(--c-border);
  border-radius:var(--r-md);
  padding:.55rem 1rem;
  font-size:.8rem;font-family:var(--f-mono);
  color:var(--c-blue-600);
  text-decoration:none;
  overflow:hidden;
  transition:background var(--t),border-color var(--t),color var(--t);
  word-break:break-all;
}
.blob-link:hover{
  background:var(--c-blue-50);
  border-color:var(--c-blue-400);
  color:var(--c-blue-700);
}
.blob-link .fi{flex-shrink:0;font-size:.9rem}
.blob-link-url{
  flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  min-width:0;
}

/* ── Toast color variants ── */
#toast.toast-success{background:#14532d;border-color:rgba(134,239,172,.2)}
#toast.toast-error{background:#7f1d1d;border-color:rgba(252,165,165,.2)}
#toast.toast-download{background:#1e3a5f;border-color:rgba(147,197,253,.2)}

/* ── Clickable preview images ── */
#preview-area img{
  cursor:pointer;
  transition:opacity var(--t),box-shadow var(--t);
}
#preview-area img:hover{
  opacity:.93;
  box-shadow:var(--sh-lg);
}
#dz-thumb{
  cursor:pointer;
  transition:opacity var(--t),box-shadow var(--t);
}
#dz-thumb:hover{
  opacity:.93;
  box-shadow:var(--sh-lg);
}


/* ── URL Import UI ── */
.url-import-wrap{
  display:flex;gap:.5rem;align-items:stretch;
}
.url-import-input{
  flex:1;min-width:0;
  padding:.52rem .875rem;
  border:1.5px solid var(--c-border);
  border-radius:var(--r-md);
  font-size:.875rem;font-family:var(--f-mono);
  color:var(--c-text);background:var(--c-surface);
  transition:border-color var(--t),box-shadow var(--t);
  outline:none;
}
.url-import-input:focus{
  border-color:var(--c-blue-500);
  box-shadow:0 0 0 3px rgba(59,130,246,.15);
}
.url-import-input::placeholder{ color:var(--c-text-3); }
.url-import-submit{
  flex-shrink:0;white-space:nowrap;
}
.url-import-hint{
  margin:.55rem 0 0;
  font-size:.775rem;color:var(--c-text-3);
  display:flex;align-items:flex-start;gap:.4rem;line-height:1.55;
}
.url-import-hint .fi{ flex-shrink:0;margin-top:.1rem;font-size:.8rem; }
.url-import-hint code{
  font-size:.73rem;background:var(--c-surface-2);
  border:1px solid var(--c-border);border-radius:3px;padding:.05rem .3rem;
}

/* btn-sm — smaller button variant */
.btn-sm{
  padding:.35rem .85rem;font-size:.8125rem;
}

/* ── Input method tabs (File / URL) ── */
.input-tabs{
  display:flex;
  border:1.5px solid var(--c-border);
  border-radius:var(--r-md);
  overflow:hidden;
  background:var(--c-surface-2);
  margin-bottom:.875rem;
}
.input-tab{
  flex:1;
  display:flex;align-items:center;justify-content:center;gap:.4rem;
  padding:.55rem 1rem;
  font-size:.8375rem;font-weight:500;
  color:var(--c-text-2);
  background:transparent;
  border:none;cursor:pointer;
  transition:background var(--t),color var(--t);
  white-space:nowrap;
}
.input-tab:hover{ background:rgba(0,0,0,.04);color:var(--c-text); }
.input-tab.active{
  background:var(--c-surface);
  color:var(--c-blue-600);
  font-weight:600;
  box-shadow:inset 0 -2px 0 var(--c-blue-500);
}
.input-panel{ /* panels shown/hidden via display toggle */ }

/* URL import panel: give it the same visual weight as the dropzone */
#panel-url .url-import-wrap{
  margin-bottom:.5rem;
}
#panel-url .url-import-input{
  /* Tall enough to feel substantial, matching the dropzone presence */
  padding:.65rem .875rem;
  font-size:.9375rem;
}

/* ================================================================
   v1.1.0 additions — Dark mode, mobile nav, theme toggle,
   skip link, focus-visible, nav-actions
   ================================================================ */

/* ── Dark mode design tokens ── */
[data-theme="dark"] {
  --c-bg:#0f172a;
  --c-bg-alt:#1e293b;
  --c-surface:#1e293b;
  --c-surface-2:#263548;
  --c-border:#334155;
  --c-border-2:#475569;

  --c-text:#e2e8f0;
  --c-text-2:#94a3b8;
  --c-text-3:#64748b;

  --c-blue-700:#3b82f6;
  --c-blue-600:#60a5fa;
  --c-blue-500:#93c5fd;
  --c-blue-400:#bfdbfe;
  --c-blue-100:#1e3a5f;
  --c-blue-50:#172554;

  --c-green-700:#4ade80;
  --c-green-600:#86efac;
  --c-green-100:#14532d;
  --c-green-50:#052e16;

  --c-red-600:#f87171;
  --c-red-100:#450a0a;
  --c-red-50:#2d0404;

  --c-header:#0f172a;

  --sh-xs:0 1px 2px rgba(0,0,0,.4);
  --sh-sm:0 1px 3px rgba(0,0,0,.5),0 1px 2px rgba(0,0,0,.4);
  --sh-md:0 4px 8px rgba(0,0,0,.5),0 2px 4px rgba(0,0,0,.35);
  --sh-lg:0 10px 24px rgba(0,0,0,.55),0 4px 8px rgba(0,0,0,.4);
  --sh-xl:0 20px 40px rgba(0,0,0,.6);
}

/* Gradient text fix for dark mode */
[data-theme="dark"] .hero h1 {
  background:linear-gradient(155deg,#e2e8f0 0%,#94a3b8 100%);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
  background-clip:text;
}

/* ── Skip to content link ── */
.skip-link {
  position:absolute;
  top:-100%;
  left:8px;
  z-index:9999;
  padding:7px 16px;
  background:var(--c-blue-600);
  color:#fff;
  font-size:.8125rem;
  font-weight:700;
  border-radius:0 0 var(--r-sm) var(--r-sm);
  text-decoration:none;
  transition:top .1s;
}
.skip-link:focus { top:0; }

/* ── Nav actions (theme toggle + hamburger) ── */
.nav-actions {
  display:flex;
  align-items:center;
  gap:.25rem;
  margin-left:.5rem;
}
.nav-icon-btn {
  all:unset;
  box-sizing:border-box;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;
  height:34px;
  border-radius:var(--r-sm);
  border:1px solid rgba(255,255,255,.15);
  color:rgba(255,255,255,.7);
  cursor:pointer;
  transition:background var(--t),border-color var(--t),color var(--t);
  flex-shrink:0;
  font-size:1rem;
}
.nav-icon-btn:hover {
  background:rgba(255,255,255,.09);
  border-color:rgba(255,255,255,.35);
  color:#fff;
}

/* ── Hamburger (hidden on desktop) ── */
.nav-hamburger { display:none; }

/* ── Focus visible rings ── */
button:focus-visible,
a:focus-visible,
[tabindex="0"]:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline:2px solid var(--c-blue-600);
  outline-offset:2px;
}

/* ── Mobile nav ── */
@media (max-width:700px) {
  .nav-hamburger { display:inline-flex; }

  .site-nav {
    position:fixed;
    top:60px;
    left:0;right:0;
    background:var(--c-header);
    border-bottom:1px solid rgba(255,255,255,.08);
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:.5rem .75rem .75rem;
    box-shadow:0 12px 32px rgba(0,0,0,.45);
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:opacity .18s ease,transform .18s ease;
    z-index:150;
  }
  .site-nav.mobile-open {
    opacity:1;
    transform:translateY(0);
    pointer-events:all;
  }
  .nav-link {
    padding:.65rem 1rem;
    font-size:.9rem;
    border-radius:var(--r-md);
  }
  .nav-tip {
    padding:.65rem 1rem;
    border-radius:var(--r-md);
  }
  .nav-github {
    padding:.65rem 1rem !important;
  }
  .nav-github .gh-label { display:inline !important; }
}

/* ── Dark mode: card adjustments ── */
[data-theme="dark"] .card {
  border-color:var(--c-border);
}
[data-theme="dark"] .feat-card {
  background:var(--c-surface);
  border-color:var(--c-border);
}
[data-theme="dark"] .chip {
  background:var(--c-surface-2);
  border-color:var(--c-border);
}
[data-theme="dark"] .hero-eyebrow {
  background:var(--c-blue-50);
  border-color:var(--c-blue-100);
}
[data-theme="dark"] .dropzone {
  background:var(--c-surface-2);
  border-color:var(--c-border);
}
[data-theme="dark"] .dropzone:hover,
[data-theme="dark"] .dropzone.drag-over {
  background:color-mix(in srgb, var(--c-blue-50) 60%, transparent);
}
[data-theme="dark"] textarea,
[data-theme="dark"] .url-import-input {
  background:var(--c-surface-2);
  border-color:var(--c-border);
  color:var(--c-text);
}
[data-theme="dark"] textarea:focus,
[data-theme="dark"] .url-import-input:focus {
  border-color:var(--c-blue-600);
}
[data-theme="dark"] .input-tabs {
  background:var(--c-surface-2);
  border-color:var(--c-border);
}
[data-theme="dark"] .input-tab.active {
  background:var(--c-surface);
}
[data-theme="dark"] .faq-item {
  border-color:var(--c-border);
}
[data-theme="dark"] .faq-q:hover {
  background:var(--c-surface-2);
}
[data-theme="dark"] .hub-card {
  background:var(--c-surface);
  border-color:var(--c-border);
}
[data-theme="dark"] .hub-donate {
  background:var(--c-surface);
  border-color:var(--c-border);
}
[data-theme="dark"] .preview-area {
  background:var(--c-surface-2);
  border-color:var(--c-border);
}
[data-theme="dark"] .site-footer {
  border-top-color:var(--c-border);
}
[data-theme="dark"] .msg-error {
  background:var(--c-red-50);
  border-color:rgba(248,113,113,.3);
}
[data-theme="dark"] .kbd {
  background:var(--c-surface-2);
  border-color:var(--c-border);
  color:var(--c-text-2);
}
[data-theme="dark"] .breadcrumb a,
[data-theme="dark"] .breadcrumb span {
  color:var(--c-text-2);
}
[data-theme="dark"] code {
  background:var(--c-surface-2);
  border-color:var(--c-border);
  color:var(--c-text);
}
[data-theme="dark"] .blob-link {
  background:var(--c-surface-2);
  border-color:var(--c-border);
}
[data-theme="dark"] .fmt-toggle label {
  border-color:var(--c-border);
  background:var(--c-surface-2);
}
[data-theme="dark"] .fmt-toggle label.active {
  background:var(--c-blue-50);
  border-color:var(--c-blue-100);
}
[data-theme="dark"] .section-head p {
  color:var(--c-text-2);
}
[data-theme="dark"] .char-count {
  color:var(--c-text-3);
}