:root{
  --blue:#1a6cf5;--navy:#0b1736;--text:#5a6b8c;--line:#e6ebf3;--bg:#fff;--hero:#fbfcff;--foot:#f9fafc;--card:#fff;
  box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--navy:#eaf0ff;--text:#9fb0d0;--line:#24304f;--bg:#0c1426;--hero:#111c36;--foot:#0f1830;--card:#101a30}}
:root[data-theme="dark"]{--navy:#eaf0ff;--text:#9fb0d0;--line:#24304f;--bg:#0c1426;--hero:#111c36;--foot:#0f1830;--card:#101a30}
*{box-sizing:border-box;margin:0}
html{height:100%}body{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}main{flex:1 0 auto}footer{flex-shrink:0}
html,body{font-family:"Inter","Segoe UI",system-ui,-apple-system,Arial,sans-serif;background:var(--bg);color:var(--navy)}
a{text-decoration:none;color:inherit}
.wrap{max-width:1400px;margin:0 auto;padding:0 clamp(16px,5vw,76px)}
header{background:var(--bg);height:76px;border-bottom:1px solid var(--line)}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:14px;font-size:30px;font-weight:700;color:var(--navy)}
.logo b{color:var(--blue);font-weight:700}
nav{display:flex;align-items:center;gap:42px;font-size:17px;color:var(--text)}
nav a{padding:28px 0;position:relative}
nav a.active{color:var(--blue);font-weight:500}
nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:16px;height:2px;background:var(--blue);border-radius:2px}
.lang{position:relative;border-left:1px solid var(--line);padding-left:24px}
.lang button{background:none;border:0;font:inherit;color:var(--text);cursor:pointer;display:flex;align-items:center;gap:8px}
.lang ul{position:absolute;right:0;top:100%;list-style:none;padding:6px;background:var(--card);border:1px solid var(--line);border-radius:10px;display:none;min-width:90px;z-index:5}
.lang ul.open{display:block}
.lang li{list-style:none}
.lang li a{display:block;padding:8px 12px;border-radius:6px;font-size:15px;color:var(--text)}
.lang li a:hover,.lang li a[aria-current]{background:var(--hero);color:var(--navy)}
.hero{background:linear-gradient(180deg,var(--bg) 0%,var(--hero) 100%);border-bottom:1px solid var(--line);overflow:hidden}.hero .wrap>*{min-width:0}
.hero .wrap{display:grid;grid-template-columns:1.1fr .9fr;align-items:center;min-height:441px;gap:20px}
h1{font-size:clamp(46px,7vw,76px);line-height:1.05;font-weight:800;letter-spacing:-1.5px}
h1 span{color:var(--blue)}
.sub{margin:26px 0 30px;font-size:22px;line-height:1.55;color:var(--text);max-width:480px}
.search{display:flex;flex-wrap:wrap;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px;max-width:720px;gap:6px;box-shadow:0 8px 28px rgba(30,70,150,.08);transition:border-color .2s,box-shadow .2s}
.search:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(26,108,245,.12)}
.field{display:flex;align-items:center;flex:1 1 220px;min-width:0}
.field svg{margin:0 10px 0 14px;flex:none}
.field input{flex:1;min-width:0;width:100%;border:0;outline:0;background:transparent;font:inherit;font-size:17px;color:var(--navy);height:48px}
.field input::placeholder{color:#8d9bb8}
.search select{flex:0 0 auto;height:48px;border:1px solid var(--line);border-radius:10px;background:var(--hero) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7da3' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 12px center;color:var(--navy);font:inherit;font-size:15px;font-weight:500;padding:0 36px 0 14px;appearance:none;-webkit-appearance:none;cursor:pointer}
.search button{flex:0 0 auto;background:var(--blue);color:#fff;border:0;border-radius:10px;padding:0 26px;height:48px;font:inherit;font-size:16px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;white-space:nowrap}
.search button:hover{background:#1559cc}
.ex{margin-top:20px;font-size:15px;color:var(--text)}
.ex a{cursor:pointer}.ex a:hover{color:var(--blue)}
.ex i{font-style:normal;margin:0 12px;color:#aab6cf}
.art{display:flex;justify-content:center}
.art svg{width:100%;max-width:560px;height:auto}
.tools{padding:56px 0 64px}
h2{font-size:34px;font-weight:700;letter-spacing:-.5px}
.tools p.s{font-size:19px;color:var(--text);margin:8px 0 34px}
.grid{display:grid;grid-template-columns:repeat(5,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 1px 2px rgba(15,30,70,.04);padding:20px 24px;height:238px;display:flex;flex-direction:column;transition:box-shadow .2s,border-color .2s;cursor:pointer}
.card:hover{box-shadow:0 8px 24px rgba(30,70,150,.12);border-color:#c9d6ee}
.ic{width:56px;height:56px;border-radius:12px;display:grid;place-items:center;margin-bottom:22px}
.card h3{font-size:20px;font-weight:700;margin-bottom:8px}
.card p{font-size:15px;line-height:1.65;color:var(--text)}
.card .go{margin-top:auto;color:var(--blue)}
footer{background:var(--foot);border-top:1px solid var(--line);padding:24px 0}
footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
footer strong{font-size:15px;color:var(--navy)}
footer small{display:block;font-size:14px;color:var(--text);margin-top:4px}
footer .copy{flex:0 0 100%;text-align:center;font-size:13.5px;color:var(--text);border-top:1px solid var(--line);padding-top:16px;margin-top:4px}
.fl{display:flex;align-items:center;gap:10px 24px;flex-wrap:wrap;font-size:14px;color:var(--text)}
.fl .sep{width:1px;height:28px;background:var(--line)}
.fl .g{display:flex;align-items:center;flex-wrap:wrap;gap:6px 14px}
.fl .g a[aria-current]{font-weight:700;color:var(--navy)}
@media (max-width:1100px){.grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:860px){
  .hero .wrap{grid-template-columns:1fr;padding-top:40px;padding-bottom:20px}
  .art{order:-1;max-width:380px;margin:0 auto}
  nav{gap:18px;font-size:15px}.logo{font-size:24px}
  .lang{padding-left:14px}
}
@media (max-width:620px){.grid{grid-template-columns:1fr 1fr}.card{height:auto;min-height:210px}.sub{font-size:18px}}
@media (max-width:620px){.field{flex:1 1 100%}.search select{flex:1 1 140px}.search button{flex:1 1 120px}.search{padding:8px}}
@media (max-width:420px){.grid{grid-template-columns:1fr}h1{font-size:44px}.logo{font-size:21px}.logo svg{width:36px;height:36px}.lang{padding-left:10px}}
:focus-visible{outline:2px solid var(--blue);outline-offset:2px}

/* ---- results ---- */
.results{padding:40px 0 8px;scroll-margin-top:16px}
.results[hidden]{display:none}
.rhead{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:20px}
.rtitle{font-size:26px;font-weight:700;letter-spacing:-.5px;overflow-wrap:anywhere}
.tag{display:inline-block;font-size:12px;padding:3px 10px;border-radius:999px;background:var(--hero);border:1px solid var(--line);color:var(--text);margin-right:6px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin-bottom:16px;box-shadow:0 1px 2px rgba(15,30,70,.04)}
.panel h3{font-size:13px;color:var(--text);font-weight:600;margin-bottom:14px;text-transform:uppercase;letter-spacing:.05em}
.kv{display:grid;grid-template-columns:minmax(110px,200px) 1fr;gap:12px 18px;font-size:15px}
.kv dt{color:var(--text)}
.kv dd{margin:0;overflow-wrap:anywhere}
.tablewrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--text);font-weight:600;font-size:13px;white-space:nowrap}
tr:last-child td{border-bottom:0}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13.5px;overflow-wrap:anywhere;word-break:break-word}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12.5px;font-weight:600;margin:0 6px 4px 0}
.pill.ok{background:#dcf5e7;color:#0b7a3e}
.pill.bad{background:#fde1e3;color:#b4202a}
.pill.warn{background:#fff0d6;color:#9a6200}
.pill.muted{background:var(--hero);color:var(--text);border:1px solid var(--line)}
.alert{border-radius:12px;padding:14px 18px;font-size:15px;margin-bottom:16px;border:1px solid;line-height:1.55;overflow-wrap:anywhere}
.alert.err{background:#fff4f4;border-color:#f3c3c7;color:#8f1d27}
.alert.warn{background:#fffaf0;border-color:#f1d9a5;color:#7a5200}
.alert.info{background:var(--hero);border-color:var(--line);color:var(--text)}
.list{list-style:none;padding:0}
.list li{padding:4px 0}
.search button[disabled]{opacity:.75;cursor:progress}
.spin{width:16px;height:16px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:sp .7s linear infinite;display:none}
.search button.loading .spin{display:inline-block}
@keyframes sp{to{transform:rotate(360deg)}}
@media (max-width:520px){.kv{grid-template-columns:1fr;gap:2px 0}.kv dd{margin-bottom:10px}.panel{padding:16px}.rtitle{font-size:22px}}
@media (prefers-color-scheme:dark){
:root:not([data-theme="light"]) .pill.ok{background:#12351f;color:#7be0a4}
:root:not([data-theme="light"]) .pill.bad{background:#3d1519;color:#ff9aa2}
:root:not([data-theme="light"]) .pill.warn{background:#3a2c0c;color:#f3c76b}
:root:not([data-theme="light"]) .alert.err{background:#2b1215;border-color:#5a2128;color:#ffb3b9}
:root:not([data-theme="light"]) .alert.warn{background:#2a220e;border-color:#54431a;color:#f3d38a}
}
:root[data-theme="dark"] .pill.ok{background:#12351f;color:#7be0a4}
:root[data-theme="dark"] .pill.bad{background:#3d1519;color:#ff9aa2}
:root[data-theme="dark"] .pill.warn{background:#3a2c0c;color:#f3c76b}
:root[data-theme="dark"] .alert.err{background:#2b1215;border-color:#5a2128;color:#ffb3b9}
:root[data-theme="dark"] .alert.warn{background:#2a220e;border-color:#54431a;color:#f3d38a}
/* ---- about page ---- */
.ahero{background:linear-gradient(180deg,var(--bg) 0%,var(--hero) 100%);border-bottom:1px solid var(--line);padding:72px 0 64px}
.ahero h1{font-size:clamp(40px,6vw,64px)}
.ahero .sub{max-width:640px;margin:22px 0 0}
.sec{padding:60px 0}
.sec.alt{background:var(--foot);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec h2{margin-bottom:10px}
.sec .lead{font-size:19px;color:var(--text);margin-bottom:32px;max-width:720px;line-height:1.6}
.text{max-width:760px;font-size:17px;line-height:1.75;color:var(--text)}
.text p+p{margin-top:16px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.step{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 1px 2px rgba(15,30,70,.04)}
.num{width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:700;margin-bottom:16px}
.step h3{font-size:19px;margin-bottom:8px}
.step p{font-size:15px;line-height:1.65;color:var(--text)}
.srcwrap{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow-x:auto}
.srcwrap table{width:100%;border-collapse:collapse;font-size:15px}
.srcwrap th,.srcwrap td{text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);vertical-align:top;line-height:1.55}
.srcwrap th{font-size:13px;color:var(--text);font-weight:600;white-space:nowrap}
.srcwrap tr:last-child td{border-bottom:0}
.srcwrap td:first-child{font-weight:600;white-space:nowrap}
.srcwrap td:last-child{color:var(--text)}
.facts{list-style:none;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:16px 28px}
.facts li{position:relative;padding-left:32px;font-size:16px;line-height:1.65;color:var(--text)}
.facts li::before{content:"";position:absolute;left:0;top:4px;width:20px;height:20px;border-radius:50%;background:#dce9fd url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231a6cf5' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 12.5 4 4 8-9'/%3E%3C/svg%3E") center/14px no-repeat}
.facts b{color:var(--navy)}
.faq{max-width:820px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;padding:0 20px}
.faq summary{cursor:pointer;list-style:none;padding:18px 28px 18px 0;font-weight:600;font-size:17px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:2px;top:50%;width:9px;height:9px;border-right:2px solid var(--text);border-bottom:2px solid var(--text);transform:translateY(-70%) rotate(45deg);transition:transform .2s}
.faq details[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq details p{padding:0 0 18px;font-size:16px;line-height:1.7;color:var(--text)}
.cta{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:44px 24px;text-align:center;box-shadow:0 8px 28px rgba(30,70,150,.08)}
.cta h2{margin-bottom:10px}
.cta p{color:var(--text);font-size:18px;margin-bottom:24px}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--blue);color:#fff;border-radius:10px;padding:0 28px;height:50px;font-weight:600;font-size:16px}
.btn:hover{background:#1559cc}
@media (max-width:1100px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:860px){.ahero{padding:48px 0 44px}.sec{padding:44px 0}.facts{grid-template-columns:1fr}.sec h2{font-size:28px}}
@media (max-width:620px){.steps{grid-template-columns:1fr}.sec .lead{font-size:17px}.text{font-size:16px}.srcwrap td:first-child{white-space:normal}.cta{padding:32px 18px}}
/* ---- legal pages ---- */
.lhero{background:linear-gradient(180deg,var(--bg) 0%,var(--hero) 100%);border-bottom:1px solid var(--line);padding:56px 0 44px}
.lhero h1{font-size:clamp(34px,5vw,52px)}
.lhero .upd{margin-top:14px;color:var(--text);font-size:15px}
.legal{max-width:780px;margin:0 auto;padding:48px 0 72px}
.legal h2{font-size:22px;margin:38px 0 12px;letter-spacing:-.3px}
.legal h2:first-child{margin-top:0}
.legal p,.legal li{font-size:16.5px;line-height:1.75;color:var(--text)}
.legal p{margin-bottom:12px}
.legal ul{padding-left:22px;margin:0 0 12px}
.legal li{margin-bottom:6px}
.legal b{color:var(--navy)}
.legal a{color:var(--blue)}
.legal .srcwrap{margin:6px 0 16px}
.ph{background:#fff3c4;color:#6b4e00;padding:1px 6px;border-radius:5px;font-weight:600;overflow-wrap:anywhere}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .ph{background:#4a3b0a;color:#ffe08a}}
:root[data-theme="dark"] .ph{background:#4a3b0a;color:#ffe08a}
@media (max-width:620px){.lhero{padding:40px 0 32px}.legal{padding:32px 0 48px}.legal h2{font-size:20px}.legal p,.legal li{font-size:16px}}

/* ---- tool pages ---- */
.hero.thero .wrap{display:block;min-height:0;padding-top:60px;padding-bottom:56px}
.thero h1{font-size:clamp(40px,6vw,64px)}
.thero .sub{max-width:640px}
.crumbs{font-size:14px;color:var(--text);margin-bottom:18px}
.crumbs a{color:var(--blue)}
.grid.g4{grid-template-columns:repeat(4,1fr)}
@media (max-width:1100px){.grid.g4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:860px){.hero.thero .wrap{padding-top:40px;padding-bottom:36px}}
@media (max-width:420px){.grid.g4{grid-template-columns:1fr}}
.sec .text h3{font-size:19px;margin:22px 0 8px;color:var(--navy)}

/* ---- MX / SPF results ---- */
.alert.ok{background:#f1fbf5;border-color:#bfe8cf;color:#0b6b37}
.rec{background:var(--hero);border:1px solid var(--line);border-radius:10px;padding:12px 14px;line-height:1.6}
.bar{height:10px;border-radius:999px;background:var(--hero);border:1px solid var(--line);overflow:hidden;max-width:360px;margin-top:8px}
.bar i{display:block;height:100%;background:#16a34a}
.bar.mid i{background:#f59e0b}
.bar.over i{background:#dc2626}
.tools .h2b{margin-top:52px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .alert.ok{background:#10261a;border-color:#1f5a38;color:#8fe3b3}}
:root[data-theme="dark"] .alert.ok{background:#10261a;border-color:#1f5a38;color:#8fe3b3}

/* ---- second field (DKIM selector), my IP box ---- */
.field[hidden]{display:none}
.field.f2{flex:0 1 200px;border-left:1px solid var(--line)}
.field.f2 input{font-size:16px}
@media (max-width:620px){.field.f2{flex:1 1 100%;border-left:0;border-top:1px solid var(--line)}}
.myiplink{margin-top:12px;font-size:15px;color:var(--text)}
.myiplink a{color:var(--blue);font-weight:600}
.ipbox{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px 24px;max-width:720px;box-shadow:0 8px 28px rgba(30,70,150,.08)}
.ipval{font-size:clamp(26px,5.2vw,46px);font-weight:700;letter-spacing:-.5px;overflow-wrap:anywhere;color:var(--navy)}
.ipmeta{margin-top:12px;min-height:26px;color:var(--text);font-size:15px;overflow-wrap:anywhere}
.copybtn{margin-top:16px;height:44px;padding:0 22px;border-radius:10px;background:var(--blue);color:#fff;border:0;font:inherit;font-weight:600;cursor:pointer}
.copybtn:hover{background:#1559cc}
.copybtn[hidden]{display:none}

/* ---- Arabic: right to left ---- */
html[dir="rtl"] body{font-family:"Segoe UI",Tahoma,"Noto Sans Arabic","Noto Naskh Arabic",system-ui,-apple-system,Arial,sans-serif}
html[dir="rtl"] h1,html[dir="rtl"] h2,html[dir="rtl"] .rtitle,html[dir="rtl"] .ipval{letter-spacing:0}
html[dir="rtl"] .lang{border-left:0;border-right:1px solid var(--line);padding-left:0;padding-right:24px}
html[dir="rtl"] .lang ul{right:auto;left:0}
html[dir="rtl"] .field svg{margin:0 14px 0 10px}
html[dir="rtl"] .search select{padding:0 14px 0 36px;background-position:left 12px center}
html[dir="rtl"] .tag{margin-right:0;margin-left:6px}
html[dir="rtl"] .pill{margin:0 0 4px 6px}
html[dir="rtl"] th,html[dir="rtl"] td,html[dir="rtl"] .srcwrap th,html[dir="rtl"] .srcwrap td{text-align:right}
html[dir="rtl"] .facts li{padding-left:0;padding-right:32px}
html[dir="rtl"] .facts li::before{left:auto;right:0}
html[dir="rtl"] .faq summary{padding:18px 0 18px 28px}
html[dir="rtl"] .faq summary::after{right:auto;left:2px}
html[dir="rtl"] .legal ul{padding-left:0;padding-right:22px}
html[dir="rtl"] .field.f2{border-left:0;border-right:1px solid var(--line)}
html[dir="rtl"] .card .go,html[dir="rtl"] .btn svg,html[dir="rtl"] .search button svg{transform:scaleX(-1)}
html[dir="rtl"] .mono,html[dir="rtl"] .rec{direction:ltr;unicode-bidi:isolate}
html[dir="rtl"] .rec{text-align:left}
@media (max-width:860px){html[dir="rtl"] .lang{padding-right:14px}}
@media (max-width:620px){html[dir="rtl"] .field.f2{border-right:0;border-top:1px solid var(--line)}}
@media (max-width:420px){html[dir="rtl"] .lang{padding-right:10px}}