@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Arabic:wght@400;500;600;700&family=Manrope:wght@400;600;700;800&display=swap');
:root{--bg:#f3f6f5;--ink:#192f36;--muted:#596f74;--border:#dfe8e6;--green:#176e62;--dark:#122e35;--amber:#e9ae6c;--white:#fff;--radius:18px;color-scheme:light}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'IBM Plex Sans Arabic',Tahoma,system-ui,sans-serif;line-height:1.75;direction:rtl}
button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--amber);outline-offset:3px}
.wrap{max-width:1200px;margin:0 auto;padding:24px 24px 55px}
.top{background:#fff;border-bottom:1px solid var(--border)}.topin{max-width:1200px;margin:auto;min-height:71px;display:flex;align-items:center;justify-content:space-between;padding:0 24px;gap:12px}
.identity{display:flex;align-items:center;gap:11px;font-family:Manrope,Tahoma,sans-serif;font-size:14px;font-weight:800}.mark{width:38px;height:38px;border-radius:11px;background:#18373c;color:#eab576;display:grid;place-items:center;font-size:17px;font-weight:800}
.back{font-size:12px;color:#256a60;background:#edf5f1;min-height:44px;padding:9px 16px;border-radius:10px;font-weight:700;display:inline-flex;align-items:center}
.hero{background:linear-gradient(118deg,#102a31,#19494b);border-radius:22px;color:#fff;padding:31px 33px;display:flex;justify-content:space-between;gap:24px;align-items:center;position:relative;overflow:hidden;margin:4px 0 23px}.hero:before{content:'';position:absolute;border:1px solid #ffffff19;border-radius:50%;width:240px;height:240px;left:-65px;top:-180px}.eyebrow{color:#b8dad4;font:800 11px Manrope,sans-serif;letter-spacing:1.4px}
h1{font-size:clamp(23px,3vw,32px);font-weight:800;line-height:1.4;margin:11px 0 6px}.hero p{margin:0;max-width:750px;color:#cbdfdc;font-size:13px}.hero-mark{font-size:65px;color:#83bcb1;opacity:.55;font-family:Manrope,sans-serif}
.stepguide{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin:0 0 21px}.stepguide span{display:flex;align-items:center;gap:8px;padding:11px 12px;background:#fff;border:1px solid var(--border);border-radius:12px;font-size:12px;font-weight:700;white-space:nowrap}.stepguide b{font:800 12px Manrope,sans-serif;color:#0a806d}
.panel{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:25px 26px;margin:17px 0;box-shadow:0 3px 16px #15323806}
.panelheader{display:flex;gap:12px;align-items:start;margin-bottom:21px}.step{min-width:34px;height:34px;display:grid;place-items:center;background:#e7f3ed;color:#116958;border-radius:10px;font:800 14px Manrope,sans-serif}
h2{font-size:20px;margin:0;font-weight:800;line-height:1.5}.panelheader p{font-size:12px;color:var(--muted);margin:1px 0 0}.inputs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.formfield{display:flex;flex-direction:column;gap:6px;min-width:0}.formfield label{font-size:12px;font-weight:750;color:#405c63}.formfield input,.formfield select{background:#fbfdfc;border:1px solid #cfddda;border-radius:11px;padding:10px 12px;min-height:45px;width:100%;direction:ltr;text-align:right;color:var(--ink);font-size:15px}.formfield select{direction:rtl}.hint{background:#f5f9f8;border:1px solid #e2ece9;border-radius:11px;color:#4e6b70;padding:11px 13px;font-size:12px;margin-top:15px}.hint b{color:#244b51}
.options{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.choice{min-height:123px;background:#f9fbfa;border:1.5px solid #dce6e2;border-radius:14px;padding:14px;display:flex;flex-direction:column;align-items:start;gap:4px;color:var(--ink);text-align:right;transition:background .15s,border-color .15s;cursor:pointer}.choice b{font-size:14px}.choice small{font-size:11px;color:#657b80}.choice strong{font:800 19px Manrope,Tahoma,sans-serif;direction:ltr}.choice.selected{background:#e9f6ef;border-color:#209280;box-shadow:inset 0 0 0 1px #209280}.choice[hidden]{display:none}.custom{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:14px;padding:14px;background:#f3f8f6;border-radius:12px}.custom[hidden]{display:none}.cardtoggle{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.chip{min-height:44px;padding:8px 15px;border:1px solid #dce7e2;background:#fff;border-radius:10px;color:#426067;font-weight:700;font-size:12px}.chip[aria-pressed='true']{border-color:#158674;background:#e4f4eb;color:#146b5d}.summary{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px}.metric{flex:1;min-width:145px;border:1px solid #e4ebe8;border-radius:12px;background:#f5f9f8;padding:14px}.metric small{display:block;color:#637e80;font-size:12px}.metric strong{font:800 21px Manrope,Tahoma,sans-serif;color:#164c52;direction:ltr}
.plan{padding:15px;border:1px solid #e0e8e6;background:#f8faf9;border-radius:13px;overflow:hidden}.plan svg{display:block;width:100%;height:auto;max-height:560px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.primary{min-height:47px;border:0;border-radius:10px;background:#145f57;color:white;font-size:13px;font-weight:800;padding:11px 19px}.primary:hover{background:#0b8070}.secondary{min-height:46px;border:1px solid #d6e3de;border-radius:10px;background:#fff;color:#315d5b;font-weight:750;font-size:12px;padding:10px 16px}.error{margin:14px 0 0;color:#a21e25;background:#fff2f1;border:1px solid #f2ccc7;padding:12px;border-radius:11px;font-size:13px}.error[hidden]{display:none}.locked{background:#f6f8f7;border:1px dashed #bfcdc8;border-radius:12px;padding:23px;text-align:center;color:#60767a;font-size:13px}.locked[hidden]{display:none}.result[hidden]{display:none}.bom{overflow-x:auto}.bom table{border-collapse:collapse;width:100%;min-width:570px;text-align:right;font-size:13px}.bom th{background:#1d5054;color:white;font-weight:800;padding:13px 15px}.bom td{padding:12px 15px;border-bottom:1px solid #e1eae7;vertical-align:top}.bom tr:nth-child(even){background:#f6f9f7}.bom .qty{font:800 15px Manrope,Tahoma,sans-serif;text-align:center;direction:ltr;color:#1b4e54}.bom .buy{color:#11735c;font-weight:800}.smallprint{margin-top:16px;background:#fff6e8;color:#7b591e;border-radius:12px;padding:14px;font-size:12px;line-height:1.95}.note{font-size:12px;color:#5e7879}.footer{font-size:11px;color:#718488;text-align:center;padding:16px}
@media(max-width:800px){.inputs{grid-template-columns:repeat(2,minmax(0,1fr))}.stepguide{grid-template-columns:repeat(2,minmax(0,1fr))}.hero-mark{display:none}}
@media(max-width:560px){.wrap{padding:16px 14px 35px}.topin{padding:0 13px;min-height:65px}.identity{font-size:11px}.hero{padding:25px 21px;border-radius:17px;margin-bottom:14px}.stepguide{gap:7px}.stepguide span{font-size:10px;padding:9px;white-space:normal;min-height:43px}.panel{padding:20px 15px;margin:13px 0}.panelheader{gap:9px}.panelheader h2{font-size:18px}.options{grid-template-columns:repeat(2,minmax(0,1fr))}.choice{padding:11px;min-height:122px}.choice:last-child:nth-child(odd){grid-column:1 / -1;min-height:100px}.choice strong{font-size:18px}.custom{grid-template-columns:1fr 1fr;padding:10px}.summary{gap:7px}.metric{min-width:calc(50% - 7px);padding:10px}.metric strong{font-size:18px}.actions .primary{width:100%}.hero p{font-size:12px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}


/* Dimensioned Armstrong technical plan: preserve legibility on narrow screens. */
.plan svg[data-diagram="armstrong-full"]{width:100%;height:auto;display:block;max-height:none;border-radius:12px}
@media(max-width:800px){
 .plan:has(svg[data-diagram="armstrong-full"]){overflow-x:auto;overscroll-behavior-x:contain;scrollbar-color:#8eaaa3 #e4eeea;scrollbar-width:thin}
 .plan svg[data-diagram="armstrong-full"]{min-width:760px;max-width:none;height:auto}
}


/* Optional suspension overlay: control does not recalculate or clear materials. */
.ak-hanger-toggle{display:flex;align-items:center;gap:11px;width:max-content;max-width:100%;cursor:pointer;border:1px solid #b9dbd0;background:#edf7f2;border-radius:12px;padding:11px 14px;margin:-2px 0 14px;min-height:56px;color:#194d4a;transition:background .15s}
.ak-hanger-toggle:hover{background:#e2f3e9}
.ak-hanger-toggle:focus-within{outline:3px solid #e9ae6c;outline-offset:2px}
.ak-hanger-toggle input{width:20px;height:20px;margin:0;accent-color:#0f766e;cursor:pointer;flex:none}
.ak-hanger-icon{color:#0f766e;background:#fff;border:2px solid #0f766e;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;font-size:9px;line-height:1;flex:none}
.ak-hanger-toggle strong,.ak-hanger-toggle small{display:block}
.ak-hanger-toggle strong{font-size:13px;font-weight:800}
.ak-hanger-toggle small{color:#577976;font-size:11px;line-height:1.5}
@media(max-width:560px){.ak-hanger-toggle{width:100%;padding:10px;gap:8px}}