@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{color-scheme:light;--navy:#071b31;--navy2:#102d49;--gold:#f3bc4c;--ink:#10243a;--muted:#526275;--line:#d9e1e8;--paper:#f6f8fa}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"DM Sans",Arial,sans-serif;color:var(--ink);background:white}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid var(--gold);outline-offset:5px}.wrap{width:min(1190px,calc(100% - 64px));margin:auto}
.site-header{position:absolute;z-index:5;top:0;left:0;width:100%;border-bottom:1px solid rgba(255,255,255,.16);color:white}.header-inner{height:80px;display:flex;align-items:center;justify-content:space-between}.wordmark{font:700 24px Manrope,Arial,sans-serif;letter-spacing:-.055em}.wordmark span{color:var(--gold)}nav{display:flex;gap:38px}nav a{font-size:15px;color:#d8e2ec;transition:color .2s}nav a:hover{color:var(--gold)}
.hero{min-height:690px;background:radial-gradient(circle at 70% 25%,#1b4163 0%,#0b2540 35%,#071b31 75%);color:white;position:relative;overflow:hidden}.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:70px 70px;mask-image:linear-gradient(90deg,transparent 15%,black 95%);opacity:.7}.hero:after{content:"";position:absolute;width:680px;height:680px;border:1px solid rgba(255,255,255,.11);border-radius:50%;right:-170px;top:70px;box-shadow:0 0 0 100px rgba(255,255,255,.022),0 0 0 200px rgba(255,255,255,.018);pointer-events:none}.hero-inner{min-height:630px;display:grid;grid-template-columns:1.2fr .8fr;gap:80px;align-items:center;padding-top:100px;position:relative;z-index:1}.eyebrow,.section-label{font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.2em}.eyebrow{color:#c0d2e3;display:flex;align-items:center;gap:14px}.rule{height:2px;width:34px;background:var(--gold)}h1,h2,h3,p{margin-top:0}h1,h2,h3{font-family:Manrope,Arial,sans-serif}h1{font-size:clamp(64px,7vw,104px);line-height:1.05;letter-spacing:-.075em;margin:22px 0 10px}.punctuation{color:var(--gold)}.hero-role{font:600 clamp(22px,2.4vw,30px) Manrope,Arial,sans-serif;letter-spacing:-.035em;margin-bottom:24px}.hero-intro{font-size:19px;line-height:1.65;max-width:575px;color:#c8d7e5}.hero-actions{display:flex;align-items:center;gap:32px;margin-top:36px}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:32px;padding:16px 22px;font-size:15px;font-weight:700;min-height:56px;border-radius:3px}.button-primary{background:var(--gold);color:#0a1c2c}.button-primary:hover{background:#ffd16b}.text-link{font-weight:600;color:white;font-size:15px}.text-link span{margin-left:10px;color:var(--gold)}.hero-panel{background:rgba(6,25,44,.72);border:1px solid rgba(205,227,247,.21);box-shadow:0 24px 70px rgba(0,0,0,.18);backdrop-filter:blur(10px);padding:28px 30px;max-width:440px;width:100%;justify-self:end}.panel-index{color:var(--gold);letter-spacing:.16em;text-transform:uppercase;font-weight:700;font-size:12px;margin-bottom:34px}.focus-row{display:flex;justify-content:space-between;gap:16px;padding:21px 0;border-top:1px solid rgba(255,255,255,.19);font-size:15px}.focus-row span{color:#b8c9da}.focus-row strong{font-weight:600;text-align:right}.panel-foot{font-size:13px;color:#a9bfd2;padding-top:30px}.hero-bottom{position:relative;z-index:1;display:flex;justify-content:space-between;color:#b4c9db;font-size:13px;text-transform:uppercase;letter-spacing:.15em;padding-bottom:27px}
.section{padding:110px 0}.two-col{display:grid;grid-template-columns:.85fr 1fr;gap:110px}.section-label{color:#ad7822;margin-bottom:26px}h2{font-size:clamp(36px,4.2vw,55px);line-height:1.17;letter-spacing:-.055em;margin-bottom:0}.body-copy{padding-top:43px}.body-copy p{font-size:18px;line-height:1.8;color:#405367;margin-bottom:22px}.work{background:var(--paper)}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:45px;margin-bottom:46px}.section-heading>p{max-width:330px;color:var(--muted);line-height:1.6;margin-bottom:5px}.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.project-card{background:white;border:1px solid var(--line);min-height:360px;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}.project-card:hover{transform:translateY(-4px);box-shadow:0 20px 35px rgba(7,27,49,.08)}.card-top{display:flex;justify-content:space-between;align-items:center;padding:23px 25px;border-bottom:1px solid var(--line)}.card-no{color:#9aabb8;font-size:14px;font-weight:700}.tag{border:1px solid #d7e0e8;color:#52677b;padding:7px 9px;font-size:12px;text-transform:uppercase;letter-spacing:.08em}.card-content{padding:34px 25px 30px;flex:1}.card-field{font-size:12px;color:#a17021;text-transform:uppercase;letter-spacing:.16em;font-weight:700;margin-bottom:17px}.card-content h3{font-size:25px;letter-spacing:-.045em;line-height:1.25;max-width:275px;margin-bottom:17px}.card-content>p:last-child{font-size:15px;line-height:1.7;color:var(--muted);margin-bottom:0}.card-footer{padding:17px 25px;border-top:1px solid var(--line);color:#5b7083;font-size:13px;display:flex;justify-content:space-between}.card-footer span{font-size:17px;color:#a17021}
.contact{background:#0b2742;color:white}.contact-inner{display:flex;align-items:end;justify-content:space-between;gap:50px}.contact .section-label{color:var(--gold)}.contact h2{margin-bottom:21px}.contact p:last-child{font-size:17px;color:#c1d1df;max-width:470px;line-height:1.7;margin-bottom:0}.contact-link{font:600 clamp(18px,2.4vw,28px) Manrope,Arial,sans-serif;border-bottom:2px solid var(--gold);padding:0 0 14px;white-space:nowrap}.contact-link span{color:var(--gold);margin-left:15px}.footer{background:#071b31;color:#a9bed0}.footer-inner{display:flex;justify-content:space-between;gap:25px;padding:30px 0;font-size:13px}
@media(max-width:900px){.hero-inner{gap:35px;grid-template-columns:1fr 320px}.hero-panel{padding:23px}.two-col{gap:50px}.project-grid{gap:12px}.card-content h3{font-size:22px}}
@media(max-width:720px){.wrap{width:min(100% - 36px,560px)}.header-inner{height:68px}.wordmark{font-size:21px}nav{gap:16px}nav a{font-size:13px}.hero{min-height:auto}.hero-inner{display:block;min-height:auto;padding-top:158px;padding-bottom:65px}.hero-panel{margin-top:65px;max-width:none}.hero-intro{font-size:17px}.hero-actions{flex-wrap:wrap;gap:23px}.hero-bottom{padding-bottom:22px}.section{padding:75px 0}.two-col{display:block}.body-copy{padding-top:28px}.body-copy p{font-size:16px}.section-heading{display:block}.section-heading>p{margin-top:24px}.project-grid{grid-template-columns:1fr;gap:16px}.project-card{min-height:300px}.contact-inner{display:block}.contact-link{display:inline-block;margin-top:38px;white-space:normal;overflow-wrap:anywhere}.footer-inner{flex-direction:column}.hero:after{right:-500px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.nav-login{border:1px solid rgba(255,255,255,.55);padding:9px 15px;margin:-9px 0;border-radius:3px;color:white}.nav-login:hover{border-color:var(--gold)}.contact-links{display:flex;align-items:flex-start;flex-direction:column;gap:24px}.linkedin-link{font-size:16px;color:#d5e4f0;border-bottom:1px solid rgba(255,255,255,.45);padding-bottom:7px}.linkedin-link span{color:var(--gold);margin-left:8px}.linkedin-link:hover{color:white;border-color:var(--gold)}
.access-page{background:var(--navy);color:white;min-height:100vh}.access-main{min-height:100vh;display:flex;align-items:center;padding:150px 0 80px;background:radial-gradient(circle at 75% 15%,#1b4163,#071b31 60%)}.access-card{max-width:620px}.access-card h1{font-size:clamp(46px,6vw,76px);margin:18px 0 22px}.access-card>p:not(.eyebrow){font-size:19px;line-height:1.7;color:#c8d7e5;max-width:550px;margin-bottom:36px}
@media(max-width:720px){nav{gap:12px}.nav-login{padding:7px 10px;margin:-7px 0}.contact-links{margin-top:35px}.contact-link{margin-top:0}.access-card>p:not(.eyebrow){font-size:17px}}
@media(max-width:400px){nav a{font-size:12px}nav{gap:9px}.wordmark{font-size:19px}}
.fea-art{position:absolute;z-index:0;width:min(73vw,980px);height:auto;right:-65px;top:135px;opacity:.62;pointer-events:none;filter:drop-shadow(0 30px 35px rgba(0,0,0,.3))}.hero-copy,.hero-panel{position:relative;z-index:1}.hero-panel{background:rgba(6,25,44,.9)}
.tools-page{background:var(--navy);color:white}.tools-main{min-height:calc(100vh - 78px);position:relative;overflow:hidden;background:radial-gradient(circle at 75% 25%,#183a5a 0%,#0a2540 42%,#071b31 78%)}.tools-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:70px 70px}.tools-layout{position:relative;display:grid;grid-template-columns:.82fr 1.18fr;align-items:center;gap:60px;min-height:calc(100vh - 78px);padding:160px 0 90px}.tools-copy h1{font-size:clamp(54px,5.8vw,84px);line-height:1.08;margin:22px 0}.tools-lead{color:#d4e1ec;font-size:20px;line-height:1.65;max-width:520px}.coming-badge{display:inline-block;margin:14px 0 25px;padding:9px 13px;background:rgba(243,188,76,.12);border:1px solid var(--gold);color:var(--gold);font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.15em}.tools-note{color:#aabfd1;line-height:1.7;max-width:480px;margin-bottom:31px}.tool-preview{background:#071a2c;padding:10px;border:1px solid #42617e;box-shadow:0 35px 85px rgba(0,0,0,.36);border-radius:9px;transform:perspective(1200px) rotateY(-5deg)}.preview-bar{height:32px;display:flex;align-items:center;gap:14px;padding:0 9px;color:#aabed0;font-size:11px;letter-spacing:.08em}.preview-dots{display:flex;gap:5px}.preview-dots i{width:6px;height:6px;border-radius:50%;background:#526c81}.tool-preview img{display:block;width:100%;height:auto;aspect-ratio:292/228;object-fit:cover;image-rendering:auto;border:1px solid #294968}.preview-overlay{display:flex;justify-content:space-between;align-items:center;gap:15px;padding:16px 9px 7px;font-size:13px;color:#aabfd0}.preview-overlay strong{color:var(--gold);font-size:14px}.tools-page nav a[aria-current]{color:var(--gold)}
@media(max-width:900px){.fea-art{width:90vw;right:-200px;top:195px;opacity:.4}.tools-layout{gap:25px}.tools-copy h1{font-size:52px}}
@media(max-width:720px){.header-inner{height:auto;min-height:68px;align-items:flex-start;padding:17px 0;gap:15px}.site-header nav{flex-wrap:wrap;justify-content:flex-end;row-gap:8px}.site-header nav a{font-size:12px}.fea-art{width:680px;right:-360px;top:275px;opacity:.27}.tools-layout{display:block;padding-top:160px;padding-bottom:75px}.tools-copy h1{font-size:clamp(46px,11vw,68px)}.tools-lead{font-size:17px}.tool-preview{margin-top:55px;transform:none}.preview-overlay{display:block}.preview-overlay span{display:block;margin-top:6px}}
.tool-preview img{aspect-ratio:1586/992}

/* Selected work: quiet civil engineering sketch behind opaque project cards. */
.work{position:relative;isolation:isolate}.work::before{content:"";position:absolute;inset:0;background:url("assets/civil-engineering-sketch.png") no-repeat right 3% center;background-size:min(82vw,1160px) auto;opacity:.17;pointer-events:none;z-index:0}.work>.wrap{position:relative;z-index:1}

/* Tool chooser. */
.tool-choice-main{background:radial-gradient(circle at 75% 8%,#1b4163,#0a2540 48%,#071b31 90%);color:white;min-height:calc(100vh - 78px);position:relative;overflow:hidden}
.tool-choice-inner{position:relative;padding:155px 0 75px}.tool-choice-inner h1{font-size:clamp(48px,6vw,78px);margin:19px 0 14px}.tool-choice-lead{font-size:18px;line-height:1.65;color:#c8d7e5;max-width:650px;margin-bottom:42px}
.tool-choice-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.tool-choice-card{display:flex;flex-direction:column;min-height:370px;padding:29px;background:rgba(9,34,58,.82);border:1px solid rgba(190,215,235,.26);transition:transform .2s,border-color .2s,background .2s}.tool-choice-card:hover,.tool-choice-card:focus-visible{transform:translateY(-4px);border-color:var(--gold);background:#123451}.tool-choice-number{color:var(--gold);text-transform:uppercase;letter-spacing:.15em;font-size:13px;font-weight:700}.tool-choice-symbol{position:relative;display:block;width:100%;height:115px;color:#77b8d9}.beam-symbol{position:absolute;width:77%;height:4px;background:#80b9d7;top:58px;left:11%;box-shadow:0 10px 0 -1px rgba(128,185,215,.25)}.beam-symbol::before,.beam-symbol::after{content:"";position:absolute;bottom:-17px;border-left:12px solid transparent;border-right:12px solid transparent;border-bottom:15px solid #80b9d7}.beam-symbol::before{left:0}.beam-symbol::after{right:0}.beam-points{position:absolute;top:17px;left:37%;color:var(--gold);font-size:22px}.concrete-symbol{width:100%;height:115px}.section-stirrups{position:absolute;left:calc(50% - 45px);top:21px;width:90px;height:78px;border:3px solid #80b9d7}.section-dots{position:absolute;left:calc(50% - 28px);top:23px;color:var(--gold);font-size:14px;z-index:1}.section-dots.bottom{top:75px}.tool-choice-card strong{font:700 clamp(23px,2.6vw,31px) Manrope,Arial,sans-serif;letter-spacing:-.045em}.tool-choice-description{display:block;color:#c5d5e2;line-height:1.6;font-size:16px;max-width:430px;margin:15px 0 30px}.tool-choice-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid rgba(255,255,255,.18);padding-top:19px;margin-top:auto;color:var(--gold);font-size:14px;font-weight:700}.choice-status{color:#afc3d2;font-size:13px;font-weight:500}.choice-status.available{color:#a9d7d1}.tool-choice-back{display:inline-block;margin-top:32px;color:#c6d8e6;font-size:15px}.tool-choice-back:hover{color:var(--gold)}

/* Reinforced concrete learning tool. */
.concrete-page .site-header{position:relative;background:var(--navy)}.concrete-main{background:#f3f6f8;min-height:calc(100vh - 80px);padding:40px 0 90px}.concrete-heading{margin-bottom:30px}.tool-breadcrumb{font-size:14px;color:#476579;font-weight:700}.tool-breadcrumb:hover{color:#a17021}.concrete-heading h1{font-size:clamp(39px,4.5vw,62px);margin:20px 0 10px;color:var(--navy)}.concrete-heading>p{color:#52677b;font-size:17px;line-height:1.6;max-width:760px;margin-bottom:0}.analysis-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,.92fr);align-items:start;gap:20px}.analysis-form,.analysis-results{background:white;border:1px solid var(--line);box-shadow:0 12px 35px rgba(7,27,49,.035);padding:29px}.mode-fieldset{border:0;padding:0;margin:0 0 28px;min-width:0}.mode-fieldset legend,.form-group h2,.result-title-row h2{font:700 19px Manrope,Arial,sans-serif;letter-spacing:-.035em;color:#12304a;margin:0 0 17px}.mode-options{display:grid;grid-template-columns:1fr 1fr;gap:9px}.mode-options label{cursor:pointer}.mode-options input{position:absolute;opacity:0}.mode-options span{display:block;border:1px solid #cbd8e2;padding:12px 10px;text-align:center;font-size:14px;font-weight:700;color:#3b566b;min-height:48px}.mode-options input:checked+span{background:#123c5b;border-color:#123c5b;color:white}.mode-options input:focus-visible+span{outline:3px solid var(--gold);outline-offset:3px}.form-group{border-top:1px solid var(--line);padding-top:23px;margin-top:22px}.input-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.input-grid label{font-size:14px;font-weight:700;color:#30495c;display:flex;flex-direction:column;gap:7px}.input-grid label span{font-weight:500;color:#6c7f8e;font-size:13px}.input-grid input{width:100%;border:1px solid #b9cbd8;background:white;border-radius:3px;min-height:46px;padding:9px 11px;font:600 16px 'DM Sans',Arial,sans-serif;color:#132d43}.input-grid input:focus{outline:2px solid #2d729c;outline-offset:1px}.input-note{font-size:13px;line-height:1.6;color:#657889;margin:26px 0 0}.result-title-row{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:22px}.result-title-row h2{margin:0}.result-title-row span{font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:#75551f;background:#fff3db;padding:7px 9px}.result-primary{background:#0d304d;color:white;padding:24px 26px}.result-primary>span{color:#bcd1e1;font-size:14px}.result-primary strong{display:block;font:800 clamp(38px,4vw,55px) Manrope,Arial,sans-serif;letter-spacing:-.06em;margin:7px 0}.result-primary small{font-size:19px;letter-spacing:0;font-weight:600}.result-primary p{font-size:14px;color:#c9dce8;line-height:1.6;margin:0}.result-primary p.exceeds{color:#ffd181}.result-metrics{display:grid;grid-template-columns:repeat(2,1fr);border-left:1px solid var(--line);border-top:1px solid var(--line);margin-top:17px}.result-metrics>div{display:flex;flex-direction:column;gap:7px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);padding:13px}.result-metrics span{font-size:13px;color:#677b8a}.result-metrics strong{font-size:18px;color:#12304a}.result-visual{margin:16px auto 7px;max-width:420px}.result-visual svg{width:100%;height:auto;display:block}.calculation-steps{border-top:1px solid var(--line);padding-top:17px}.calculation-steps summary{font-size:15px;font-weight:700;color:#12304a;cursor:pointer}.calculation-steps ol{padding-left:21px;margin:14px 0 0}.calculation-steps li{padding:7px 0;color:#52677b;font-size:13px;line-height:1.6}.calculation-steps li strong{display:block;color:#153751;font-size:14px;overflow-wrap:anywhere}.method-note{border-top:1px solid var(--line);padding-top:18px;margin:18px 0 0;color:#637686;font-size:13px;line-height:1.65}.method-note a{color:#1a668c;text-decoration:underline;text-underline-offset:2px}.input-error{background:#fff0e6;border:1px solid #e9b48d;color:#8f421c;padding:16px;line-height:1.5;font-size:14px}
@media(max-width:900px){.analysis-layout{grid-template-columns:1fr}.tool-choice-grid{gap:14px}.tool-choice-card{padding:23px}}
@media(max-width:720px){.work::before{background-size:900px auto;background-position:54% 25%;opacity:.1}.tool-choice-inner{padding:155px 0 65px}.tool-choice-lead{font-size:16px}.tool-choice-grid{grid-template-columns:1fr}.tool-choice-card{min-height:300px}.concrete-main{padding-top:30px}.analysis-form,.analysis-results{padding:22px}.concrete-heading h1{font-size:42px}.concrete-heading>p{font-size:16px}}
@media(max-width:450px){.input-grid{grid-template-columns:1fr 1fr;gap:12px}.mode-options{grid-template-columns:1fr}.result-title-row{align-items:flex-start;flex-direction:column}.analysis-form,.analysis-results{padding:17px}.input-grid input{font-size:16px}.tool-choice-bottom{flex-wrap:wrap}}

[hidden]{display:none!important}

/* About: a restrained structural sketch in the lower open area. */
.about{position:relative;isolation:isolate;overflow:hidden}.about::before{content:"";position:absolute;left:-18px;bottom:-215px;width:min(67vw,930px);aspect-ratio:3/2;background:url("assets/about-structure-sketch.png") center/contain no-repeat;opacity:.18;pointer-events:none;z-index:0}.about>.wrap{position:relative;z-index:1}
@media(max-width:720px){.about::before{width:min(115vw,650px);left:-110px;bottom:-125px;opacity:.09}}

/* Give the structural visual space to breathe in the opening section. */
@media(min-width:721px){.hero-inner{display:flex;gap:0}.hero-copy{max-width:610px}.fea-art{width:min(63vw,890px);right:-78px;top:145px;opacity:.67}}