:root{
    --bg-1:#0b1220;
    --bg-2:#111a2e;
    --accent-a:#5eead4;   /* teal */
    --accent-b:#8b8ff5;   /* violet */
    --accent-c:#f5a3c7;   /* soft pink, sparing use */
    --glass-fill: rgba(255,255,255,0.055);
    --glass-fill-strong: rgba(255,255,255,0.09);
    --glass-border: rgba(255,255,255,0.14);
    --glass-border-soft: rgba(255,255,255,0.08);
    --text-1:#eef2f8;
    --text-2:#a7b2c6;
    --text-3:#6b768c;
    --danger:#ff8080;
    --danger-glow: rgba(255,90,90,0.25);
    --ok:#5eead4;
    --ok-glow: rgba(94,234,212,0.25);
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
  }

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

  html,body{height:100%;}

  body{
    font-family:'Tajawal', sans-serif;
    color:var(--text-1);
    min-height:100vh;
    direction:rtl;
    background: var(--bg-1);
    position:relative;
    overflow-x:hidden;
    padding: 40px 18px 60px;
  }

  /* ------- Ambient background: layered light through glass ------- */
  .bg-scene{
    position:fixed;
    inset:0;
    z-index:0;
    background:
      radial-gradient(ellipse 900px 700px at 12% -10%, rgba(139,143,245,0.35), transparent 60%),
      radial-gradient(ellipse 800px 700px at 110% 10%, rgba(94,234,212,0.28), transparent 55%),
      radial-gradient(ellipse 700px 600px at 50% 120%, rgba(245,163,199,0.14), transparent 60%),
      linear-gradient(160deg, var(--bg-1), var(--bg-2) 60%, #0a0f1c);
  }
  .bg-scene::before{
    content:"";
    position:absolute; inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 10%, black, transparent 75%);
  }
  .orb{
    position:fixed;
    border-radius:50%;
    filter: blur(60px);
    opacity:0.55;
    z-index:0;
    pointer-events:none;
  }
  .orb-1{ width:340px; height:340px; top:-80px; right:-60px; background: radial-gradient(circle, var(--accent-b), transparent 70%); }
  .orb-2{ width:300px; height:300px; bottom:-40px; left:-80px; background: radial-gradient(circle, var(--accent-a), transparent 70%); animation: float 14s ease-in-out infinite; }
  @keyframes float{
    0%,100%{ transform: translateY(0px); }
    50%{ transform: translateY(-26px); }
  }
  @media (prefers-reduced-motion: reduce){
    .orb-2{ animation:none; }
  }

  .page{
    position:relative;
    z-index:1;
    max-width: 720px;
    margin: 0 auto;
  }

  /* ------- Header ------- */
  header{
    text-align:center;
    margin-bottom: 30px;
  }
  .badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--glass-fill);
    border: 1px solid var(--glass-border-soft);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
    font-family:'JetBrains Mono', monospace;
    font-size: 11.5px;
    letter-spacing:0.5px;
    color: var(--accent-a);
    margin-bottom:18px;
  }
  .badge span.dot{
    width:6px; height:6px; border-radius:50%;
    background: var(--accent-a);
    box-shadow: 0 0 8px var(--accent-a);
  }
  .brand{
    font-family:'JetBrains Mono', monospace;
    font-weight:700;
    font-size: clamp(19px, 3.4vw, 23px);
    letter-spacing:2px;
    color: var(--text-1);
    margin-bottom:14px;
  }
  .brand span{
    color: var(--accent-a);
  }

  h1{
    font-size: clamp(26px, 5vw, 34px);
    font-weight:900;
    line-height:1.25;
    background: linear-gradient(95deg, var(--text-1) 20%, var(--accent-a) 55%, var(--accent-b) 85%);
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
    margin-bottom:10px;
  }
  .subtitle{
    color: var(--text-2);
    font-size:14.5px;
    max-width:480px;
    margin: 0 auto;
    line-height:1.7;
  }

  /* ------- Glass panel base ------- */
  .glass{
    position:relative;
    background: var(--glass-fill);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(22px) saturate(150%);
    -webkit-backdrop-filter: blur(22px) saturate(150%);
    box-shadow:
      0 1px 0 rgba(255,255,255,0.18) inset,
      0 0 0 1px rgba(255,255,255,0.02) inset,
      0 20px 50px rgba(0,0,0,0.35);
    overflow:hidden;
  }
  .glass::before{
    /* top sheen, like light catching a glass pane */
    content:"";
    position:absolute;
    top:0; left:0; right:0;
    height:1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.6), transparent);
  }

  .info-panel{
    padding: 20px 22px;
    margin-bottom: 22px;
  }
  .info-panel h3{
    font-size:14px;
    color: var(--text-1);
    margin-bottom:12px;
    display:flex;
    align-items:center;
    gap:8px;
  }
  .info-panel h3 .ic{ color: var(--accent-a); }
  .info-grid{
    display:grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 14px;
  }
  .info-grid .row{
    font-size:12.5px;
    color: var(--text-2);
    display:flex;
    gap:8px;
    align-items:flex-start;
    line-height:1.6;
  }
  .info-grid .row::before{
    content:"◆";
    color: var(--accent-b);
    font-size:8px;
    margin-top:5px;
    flex-shrink:0;
  }
  @media (max-width:520px){
    .info-grid{ grid-template-columns: 1fr; }
  }

  /* ------- Section cards ------- */
  .section{
    padding: 24px;
    margin-bottom: 22px;
  }
  .section-head{
    display:flex;
    align-items:center;
    gap:10px;
    margin-bottom:18px;
    padding-bottom:14px;
    border-bottom: 1px solid var(--glass-border-soft);
  }
  .section-head .icon-chip{
    width:34px; height:34px;
    border-radius: 10px;
    display:flex; align-items:center; justify-content:center;
    font-size:16px;
    background: linear-gradient(135deg, rgba(94,234,212,0.18), rgba(139,143,245,0.18));
    border: 1px solid var(--glass-border-soft);
    flex-shrink:0;
  }
  .section-head h2{
    font-size:16.5px;
    font-weight:700;
    color: var(--text-1);
  }
  .section-head .tag{
    margin-inline-start:auto;
    font-family:'JetBrains Mono', monospace;
    font-size:10.5px;
    color: var(--text-3);
    background: rgba(255,255,255,0.04);
    border:1px solid var(--glass-border-soft);
    padding:3px 8px;
    border-radius:6px;
  }

  label{
    display:block;
    font-size:13px;
    color: var(--text-2);
    margin-bottom:8px;
    font-weight:500;
  }
  .field{ margin-bottom:16px; }

  input[type="password"], textarea{
    width:100%;
    padding: 13px 15px;
    background: rgba(0,0,0,0.22);
    color: var(--text-1);
    border: 1px solid var(--glass-border-soft);
    border-radius: var(--radius-sm);
    font-size:14.5px;
    font-family:'Tajawal', sans-serif;
    resize:vertical;
    direction:rtl;
    text-align:right;
    transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
  }
  textarea{ min-height:96px; line-height:1.6; }
  input[type="password"]{ font-family:'JetBrains Mono', monospace; letter-spacing:1px; }

  input[type="password"]:focus, textarea:focus{
    outline:none;
    border-color: var(--accent-a);
    background: rgba(0,0,0,0.32);
    box-shadow: 0 0 0 3px rgba(94,234,212,0.14);
  }

  .strength-meter{
    height:4px;
    background: rgba(255,255,255,0.08);
    border-radius:2px;
    margin-top:8px;
    overflow:hidden;
  }
  .strength-bar{
    height:100%;
    width:0%;
    border-radius:2px;
    background: var(--danger);
    transition: width .25s ease, background .25s ease;
  }
  .strength-label{
    font-size:11px;
    color: var(--text-3);
    margin-top:5px;
    font-family:'JetBrains Mono', monospace;
  }

  /* buttons */
  button{
    font-family:'Tajawal', sans-serif;
    font-weight:700;
    font-size:14.5px;
    border-radius: var(--radius-sm);
    padding: 13px 20px;
    width:100%;
    cursor:pointer;
    border: 1px solid transparent;
    transition: transform .15s ease, box-shadow .2s ease, filter .2s ease;
  }
  button:active{ transform: translateY(1px); }

  .btn-primary{
    margin-top: 4px;
    background: linear-gradient(120deg, var(--accent-a), var(--accent-b));
    color: #06111a;
    box-shadow: 0 10px 26px rgba(94,234,212,0.22);
  }
  .btn-primary:hover{ filter:brightness(1.06); box-shadow: 0 12px 30px rgba(94,234,212,0.32); }

  .btn-ghost{
    margin-top:12px;
    background: rgba(255,255,255,0.04);
    color: var(--text-1);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
  }
  .btn-ghost:hover{ background: rgba(255,255,255,0.08); }

  .out-label{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-top:18px;
    margin-bottom:8px;
  }
  .out-label label{ margin-bottom:0; }

  .result-box{
    background: rgba(0,0,0,0.28);
    color: var(--accent-a);
    padding: 14px 15px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border-soft);
    min-height:70px;
    font-size:13.5px;
    direction:ltr;
    text-align:left;
    white-space:pre-wrap;
    word-wrap:break-word;
    font-family:'JetBrains Mono', monospace;
    line-height:1.6;
  }
  #decryptedResult{ color: var(--text-1); direction:rtl; text-align:right; font-family:'Tajawal', sans-serif; }

  .msg{
    font-size:12.5px;
    margin-top:8px;
    padding: 8px 12px;
    border-radius: 8px;
    display:none;
    align-items:center;
    gap:6px;
  }
  .msg.error{
    color: var(--danger);
    background: rgba(255,90,90,0.08);
    border:1px solid rgba(255,90,90,0.22);
  }
  .msg.success{
    color: var(--ok);
    background: rgba(94,234,212,0.08);
    border:1px solid rgba(94,234,212,0.22);
  }

  footer{
    text-align:center;
    margin-top: 10px;
    padding: 18px 10px 4px;
    font-size:12px;
    color: var(--text-3);
    line-height:1.9;
  }
  footer .line1{ color: var(--text-2); }

  .dev-link{
    display:inline-flex;
    align-items:center;
    gap:8px;
    margin: 16px auto 6px;
    padding: 10px 20px;
    border-radius: 999px;
    background: var(--glass-fill);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    color: var(--text-1);
    font-size:13px;
    font-weight:600;
    text-decoration:none;
    transition: background .2s ease, box-shadow .2s ease, transform .15s ease;
    width: fit-content;
  }
  .dev-link:hover{
    background: var(--glass-fill-strong);
    box-shadow: 0 10px 26px rgba(94,234,212,0.16);
    transform: translateY(-1px);
  }
  .dev-link .ic{
    color: var(--accent-a);
    font-size:15px;
  }