/* ==========================================================================
   Design tokens
   ========================================================================== */
:root{
  --ink-950:#0A0E13;
  --ink-900:#0F151C;
  --ink-800:#141C25;
  --ink-700:#1B2530;
  --line:#26313D;
  --text-hi:#EAF1F7;
  --text-mid:#AEBBC9;
  --text-low:#6C7B8C;
  --signal:#22E6B7;      /* primary action - "output" teal */
  --signal-dim:#16A184;
  --flare:#FFB13C;       /* secondary accent - warm flare */
  --danger:#FF5D5D;
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --font-display:'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body:'Inter', 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', ui-monospace, monospace;
  --shadow-1: 0 1px 0 rgba(255,255,255,.03) inset, 0 20px 40px -20px rgba(0,0,0,.6);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(34,230,183,.08), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(255,177,60,.06), transparent 55%),
    var(--ink-950);
  color:var(--text-hi);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}
[dir="rtl"] body{ text-align:right; }
a{color:inherit;}
img{max-width:100%; display:block;}
h1,h2,h3{font-family:var(--font-display); letter-spacing:-0.02em; margin:0;}
.container{max-width:1120px; margin:0 auto; padding:0 24px;}
.mono{font-family:var(--font-mono);}

::selection{ background:var(--signal); color:#04140F; }
:focus-visible{ outline:2px solid var(--signal); outline-offset:2px; }

/* ==========================================================================
   Top bar
   ========================================================================== */
.topbar{
  position:sticky; top:0; z-index:40;
  background:rgba(10,14,19,.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{ display:flex; align-items:center; justify-content:space-between; padding:16px 24px; }
.brand{ display:flex; align-items:center; gap:10px; font-family:var(--font-display); font-weight:700; font-size:20px; text-decoration:none; color:var(--text-hi); }
.brand-mark{
  width:30px; height:30px; border-radius:9px;
  background:linear-gradient(135deg, var(--signal), var(--flare));
  display:flex; align-items:center; justify-content:center;
  font-family:var(--font-mono); font-weight:700; font-size:12px; color:#06120E;
}
.nav{ display:flex; gap:28px; align-items:center; }
.nav a{ text-decoration:none; color:var(--text-mid); font-size:14.5px; font-weight:500; }
.nav a:hover{ color:var(--text-hi); }

.lang-switch{ position:relative; }
.lang-switch select{
  appearance:none; background:var(--ink-800); color:var(--text-hi);
  border:1px solid var(--line); border-radius:var(--radius-sm);
  padding:8px 30px 8px 12px; font-size:13.5px; font-family:var(--font-body);
  cursor:pointer;
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero{ padding:76px 0 40px; text-align:center; }
.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-family:var(--font-mono); font-size:12px; letter-spacing:.08em; text-transform:uppercase;
  color:var(--signal); background:rgba(34,230,183,.08); border:1px solid rgba(34,230,183,.25);
  padding:6px 12px; border-radius:999px; margin-bottom:22px;
}
.eyebrow .dot{ width:6px; height:6px; border-radius:50%; background:var(--signal); box-shadow:0 0 0 3px rgba(34,230,183,.18); }

.hero h1{ font-size:clamp(32px, 5vw, 56px); line-height:1.08; margin-bottom:18px; }
.hero p{ color:var(--text-mid); font-size:17px; max-width:560px; margin:0 auto 8px; }

/* format-chip morph, the signature element */
.chip-row{ display:flex; gap:10px; justify-content:center; flex-wrap:wrap; margin:28px 0 8px; }
.fmt-chip{
  font-family:var(--font-mono); font-size:13px; font-weight:600;
  padding:7px 14px; border-radius:999px; border:1px solid var(--line);
  color:var(--text-mid); background:var(--ink-800);
}
.fmt-chip.on{ color:#06140F; background:var(--signal); border-color:var(--signal); }
.fmt-arrow{ color:var(--text-low); align-self:center; font-size:13px; }

/* ==========================================================================
   Converter card
   ========================================================================== */
.converter{
  max-width:720px; margin:36px auto 0;
  background:var(--ink-800); border:1px solid var(--line); border-radius:var(--radius-lg);
  box-shadow:var(--shadow-1); overflow:hidden;
}
.converter-head{ display:flex; align-items:center; justify-content:space-between; padding:16px 20px; border-bottom:1px solid var(--line); }
.converter-head .to{ font-family:var(--font-mono); font-size:13px; color:var(--text-low); }
select.output-select{
  background:var(--ink-700); color:var(--text-hi); border:1px solid var(--line);
  border-radius:var(--radius-sm); padding:8px 12px; font-size:14px; font-family:var(--font-mono);
}

.dropzone{
  margin:22px; padding:44px 20px; text-align:center;
  border:1.5px dashed var(--line); border-radius:var(--radius-md);
  background:var(--ink-900);
  transition:border-color .15s, background .15s;
  cursor:pointer;
}
.dropzone.drag{ border-color:var(--signal); background:rgba(34,230,183,.06); }
.dropzone svg{ margin:0 auto 14px; opacity:.75; }
.dropzone .main{ font-size:16px; font-weight:600; margin-bottom:4px; }
.dropzone .sub{ font-size:13.5px; color:var(--text-low); }
.dropzone input[type=file]{ display:none; }

.file-row{
  display:flex; align-items:center; gap:12px; margin:0 22px 18px;
  background:var(--ink-900); border:1px solid var(--line); border-radius:var(--radius-sm);
  padding:12px 14px; display:none;
}
.file-row.show{ display:flex; }
.file-row .name{ font-family:var(--font-mono); font-size:13px; flex:1; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.file-row .size{ font-size:12px; color:var(--text-low); }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  border:none; border-radius:var(--radius-sm); padding:13px 22px;
  font-family:var(--font-body); font-weight:600; font-size:15px; cursor:pointer;
  transition:transform .1s, opacity .15s;
}
.btn:active{ transform:scale(.98); }
.btn-primary{ background:var(--signal); color:#052018; width:calc(100% - 44px); margin:0 22px 22px; }
.btn-primary:disabled{ opacity:.5; cursor:not-allowed; }
.btn-ghost{ background:transparent; color:var(--text-mid); border:1px solid var(--line); }

.progress{ height:6px; background:var(--ink-700); border-radius:99px; margin:0 22px 18px; overflow:hidden; display:none; }
.progress.show{ display:block; }
.progress > i{ display:block; height:100%; width:0%; background:linear-gradient(90deg, var(--signal), var(--flare)); transition:width .2s; }

.result{ margin:0 22px 22px; display:none; }
.result.show{ display:block; }
.result-card{
  display:flex; align-items:center; gap:14px; background:rgba(34,230,183,.07);
  border:1px solid rgba(34,230,183,.25); border-radius:var(--radius-md); padding:16px;
}
.result-card svg{ flex-shrink:0; }
.result-meta{ flex:1; }
.result-meta .n{ font-family:var(--font-mono); font-size:13.5px; }
.result-meta .s{ font-size:12.5px; color:var(--text-low); }

.privacy-note{ text-align:center; font-size:12.5px; color:var(--text-low); padding:0 22px 24px; }
.privacy-note b{ color:var(--text-mid); }

/* ==========================================================================
   Tools grid
   ========================================================================== */
.section{ padding:64px 0; }
.section-title{ font-size:28px; margin-bottom:8px; }
.section-sub{ color:var(--text-mid); margin-bottom:32px; }

.tools-grid{ display:grid; grid-template-columns:repeat(auto-fill, minmax(230px,1fr)); gap:16px; }
.tool-card{
  background:var(--ink-800); border:1px solid var(--line); border-radius:var(--radius-md);
  padding:20px; text-decoration:none; color:var(--text-hi);
  transition:border-color .15s, transform .15s;
}
.tool-card:hover{ border-color:var(--signal); transform:translateY(-2px); }
.tool-card .badge{
  display:inline-block; font-family:var(--font-mono); font-size:11px; color:var(--flare);
  background:rgba(255,177,60,.1); border:1px solid rgba(255,177,60,.25);
  padding:2px 8px; border-radius:99px; margin-bottom:12px;
}
.tool-card h3{ font-size:16px; margin-bottom:6px; }
.tool-card p{ font-size:13px; color:var(--text-low); margin:0; }

/* ==========================================================================
   Ad slots
   ========================================================================== */
.ad-slot{ margin:28px auto; text-align:center; max-width:1120px; padding:0 24px; }
.ad-slot .placeholder{
  border:1px dashed var(--line); border-radius:var(--radius-sm); color:var(--text-low);
  font-size:12px; font-family:var(--font-mono); padding:14px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer{ border-top:1px solid var(--line); padding:40px 0; margin-top:40px; }
.footer-inner{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:16px; }
.footer-inner .muted{ color:var(--text-low); font-size:13px; }

/* ==========================================================================
   Misc / responsive
   ========================================================================== */
@media (max-width:640px){
  .nav{ display:none; }
  .converter-head{ flex-direction:column; align-items:flex-start; gap:10px; }
  select.output-select{ width:100%; }
}

/* Admin */
.admin-body{ background:var(--ink-950); color:var(--text-hi); font-family:var(--font-body); margin:0; }
.admin-shell{ display:flex; min-height:100vh; }
.admin-side{ width:230px; background:var(--ink-900); border-right:1px solid var(--line); padding:22px 0; }
.admin-side a{
  display:block; padding:11px 22px; color:var(--text-mid); text-decoration:none; font-size:14px;
}
.admin-side a.active, .admin-side a:hover{ color:var(--text-hi); background:var(--ink-800); border-left:2px solid var(--signal); }
.admin-main{ flex:1; padding:32px 40px; }
.admin-card{ background:var(--ink-800); border:1px solid var(--line); border-radius:var(--radius-md); padding:22px; margin-bottom:20px; }
.admin-grid{ display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:16px; }
.stat-box{ background:var(--ink-800); border:1px solid var(--line); border-radius:var(--radius-md); padding:18px; }
.stat-box .v{ font-family:var(--font-display); font-size:28px; }
.stat-box .l{ color:var(--text-low); font-size:12.5px; text-transform:uppercase; letter-spacing:.06em; }
table.admin-table{ width:100%; border-collapse:collapse; font-size:14px; }
table.admin-table th, table.admin-table td{ text-align:left; padding:10px 12px; border-bottom:1px solid var(--line); }
[dir="rtl"] table.admin-table th, [dir="rtl"] table.admin-table td{ text-align:right; }
.toggle{ position:relative; display:inline-block; width:42px; height:24px; }
.toggle input{ opacity:0; width:0; height:0; }
.toggle span{ position:absolute; inset:0; background:var(--ink-700); border-radius:99px; transition:.15s; }
.toggle span:before{ content:''; position:absolute; height:18px; width:18px; left:3px; top:3px; background:var(--text-mid); border-radius:50%; transition:.15s; }
.toggle input:checked + span{ background:var(--signal-dim); }
.toggle input:checked + span:before{ transform:translateX(18px); background:#06140F; }
.login-box{ max-width:360px; margin:120px auto; }
input[type=text], input[type=password], input[type=number], input[type=url], textarea{
  width:100%; background:var(--ink-900); border:1px solid var(--line); color:var(--text-hi);
  border-radius:var(--radius-sm); padding:10px 12px; font-family:var(--font-body); font-size:14px;
}
label{ font-size:13px; color:var(--text-mid); display:block; margin-bottom:6px; }
.field{ margin-bottom:16px; }
.msg-ok{ background:rgba(34,230,183,.1); border:1px solid rgba(34,230,183,.3); color:var(--signal); padding:10px 14px; border-radius:var(--radius-sm); font-size:13.5px; margin-bottom:16px; }
.msg-err{ background:rgba(255,93,93,.1); border:1px solid rgba(255,93,93,.3); color:var(--danger); padding:10px 14px; border-radius:var(--radius-sm); font-size:13.5px; margin-bottom:16px; }