/* ===== THEOREM · mathematics · graph-paper + chalkboard + number line ===== */
:root{
 --board:#0E2A24; --board-2:#123A31; --slate:#0A1F1A;
 --paper:#F6F4EC; --paper-2:#EDEADD; --card:#FFFFFF; --grid:#E1DECB;
 --ink:#1C2622; --muted:#5F6E67; --line:#DEDACB;
 --chalk:#F3F0E4; --chalk-blue:#8FD0E8; --chalk-y:#F2C94C; --chalk-r:#E8836B;
 --plum:#7A5CC4; --teal:#1F8A6D; --teal-deep:#125C48; --amber:#D98E2B; --wa:#1FAB55;
 --d:'Fraunces',Georgia,serif; --m:'JetBrains Mono',ui-monospace,monospace; --b:'Space Grotesk',system-ui,sans-serif;
 --ease:cubic-bezier(.22,1,.36,1);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:74px}
body{font-family:var(--b);background:var(--paper);color:var(--ink);line-height:1.68;font-size:16.5px;-webkit-font-smoothing:antialiased;overflow-x:hidden;
 background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);
 background-size:26px 26px;background-position:-1px -1px}
a{text-decoration:none;color:inherit}
a:hover{color:var(--teal)}
h1,h2,h3{font-family:var(--d);font-weight:600;line-height:1.06;letter-spacing:-.01em}
.wrap{max-width:960px;margin:0 auto;padding-inline:20px}
section{padding-block:clamp(56px,9vw,96px);position:relative}
.rv{opacity:0;transform:translateY(26px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.rv{opacity:1;transform:none}html{scroll-behavior:auto}}
:focus-visible{outline:3px solid var(--teal);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px}
.skip:focus{left:8px;z-index:200;background:var(--ink);color:#fff;padding:8px 16px;border-radius:6px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;font-size:.9rem;min-height:52px;padding:13px 28px;border-radius:10px;border:2px solid transparent;cursor:pointer;transition:transform .3s var(--ease),box-shadow .3s var(--ease);white-space:nowrap}
.btn:hover{transform:translateY(-3px)}
.btn:active{transform:scale(.98)}
.btn svg{width:18px;height:18px;flex-shrink:0}
.btn-teal{background:var(--teal);color:#EAF7F1;box-shadow:0 14px 30px -14px rgba(31,138,109,.8)}
.btn-chalk{background:var(--chalk-y);color:#3A2C05}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:var(--paper)}
.btn-wa{background:var(--wa);color:#fff}

.k{font-family:var(--m);font-size:.72rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--teal);display:block;margin-bottom:14px}
.k::before{content:"∴ "}
h2{font-size:clamp(1.9rem,5.5vw,3rem)}
h2 em{font-style:italic;font-weight:500;color:var(--teal)}
.lead{color:var(--muted);max-width:58ch;margin-top:12px}

/* equation divider */
.eq-div{display:flex;align-items:center;justify-content:center;gap:16px;max-width:960px;margin:0 auto;padding-inline:20px;color:var(--line)}
.eq-div::before,.eq-div::after{content:"";flex:1;border-top:1px dashed var(--line)}
.eq-div span{font-family:var(--m);font-size:.82rem;color:var(--teal);letter-spacing:.1em;white-space:nowrap}

/* ---- NAV ---- */
.nav{position:fixed;top:0;left:0;right:0;z-index:80;background:color-mix(in srgb,var(--paper) 92%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-in{max-width:960px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:11px 20px}
.brand{font-family:var(--d);font-size:1.2rem;font-weight:600;flex-shrink:0;display:flex;align-items:center;gap:8px}
.brand i{font-style:normal;color:var(--teal);font-family:var(--m);font-size:1.05rem}
.menu{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;flex:1}
.menu::-webkit-scrollbar{display:none}
.menu a{font-size:.75rem;font-weight:700;color:var(--muted);padding:7px 12px;border-radius:8px;white-space:nowrap;transition:.25s}
.menu a:hover,.menu a.active{background:var(--teal);color:#EAF7F1}
.nav-cta{display:none;flex-shrink:0}
@media(min-width:768px){.nav-cta{display:inline-flex;min-height:40px;padding:6px 18px;font-size:.78rem}}

/* ---- HERO · chalkboard ---- */
.hero{position:relative;color:var(--chalk);overflow:hidden;
 background:radial-gradient(ellipse 120% 90% at 30% 0%,var(--board-2),var(--board) 60%,var(--slate));border-bottom:6px solid #6B4A2A}
.chalklines{position:absolute;inset:0;opacity:.5;pointer-events:none}
.chalklines text{font-family:'JetBrains Mono',monospace;fill:rgba(243,240,228,.16);font-size:22px}
.chalklines .ax{stroke:rgba(143,208,232,.22);stroke-width:1.5;fill:none}
.chalklines .curve{stroke:rgba(242,201,76,.5);stroke-width:2.5;fill:none;stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 4s var(--ease) .3s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.hero-nav{position:relative;z-index:3;display:flex;justify-content:space-between;align-items:center;padding:18px 20px;max-width:960px;margin:0 auto}
.hero-nav .mark{font-family:var(--d);font-size:1.3rem}
.hero-nav .mark i{font-style:normal;color:var(--chalk-y);font-family:var(--m)}
.hero-grid{position:relative;z-index:3;display:grid;gap:44px;padding-block:clamp(30px,6vw,64px) clamp(64px,10vw,110px);align-items:center}
.stamp{font-family:var(--m);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--chalk-blue);display:block;margin-bottom:20px}
.hero h1{font-size:clamp(2.6rem,9vw,4.8rem);max-width:15ch;color:var(--chalk)}
.hero h1 em{font-style:italic;font-weight:500;color:var(--chalk-y)}
.hero .sub{color:rgba(243,240,228,.72);max-width:50ch;margin:22px 0 32px;font-size:1.04rem}
.cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:26px}
.hero-meta{font-family:var(--m);font-size:.74rem;color:rgba(243,240,228,.6);display:flex;gap:22px;flex-wrap:wrap}
.hero-meta b{color:var(--chalk);font-weight:700}
/* chalk formula card */
.formula{justify-self:center;position:relative;width:min(300px,74vw);aspect-ratio:1;border-radius:14px;
 background:repeating-linear-gradient(0deg,rgba(143,208,232,.09) 0 1px,transparent 1px 28px),repeating-linear-gradient(90deg,rgba(143,208,232,.09) 0 1px,transparent 1px 28px),rgba(255,255,255,.03);
 border:1.5px solid rgba(143,208,232,.28);display:grid;place-items:center;padding:20px;box-shadow:inset 0 0 40px rgba(0,0,0,.3)}
.formula .glyph{font-family:var(--m);font-size:2.2rem;color:var(--chalk);text-align:center;line-height:1.7}
.formula .glyph b{color:var(--chalk-y);font-weight:700}
.formula .glyph small{display:block;font-size:.7rem;letter-spacing:.2em;color:var(--chalk-blue);margin-top:14px}
.formula .pi{position:absolute;font-family:var(--d);font-style:italic;color:var(--chalk-r);opacity:.5;font-size:1.6rem;animation:float 6s ease-in-out infinite}
.formula .pi.a{top:8%;right:10%}.formula .pi.b{bottom:10%;left:8%;animation-delay:2s;color:var(--plum)}
@keyframes float{50%{transform:translateY(-10px)}}
@media(min-width:768px){.hero-grid{grid-template-columns:1.2fr .8fr}}

/* ---- SCORE STRIP (counters) ---- */
.score{background:var(--slate);color:var(--chalk);border-top:3px solid var(--chalk-y);padding:26px 0}
.score-grid{display:flex;justify-content:center;gap:clamp(20px,6vw,56px);flex-wrap:wrap;font-family:var(--m)}
.sc-i{text-align:center}
.sc-i b{font-size:clamp(1.6rem,5vw,2.3rem);font-weight:700;display:block;color:var(--chalk-y)}
.sc-i span{font-size:.64rem;letter-spacing:.18em;color:rgba(243,240,228,.55);text-transform:uppercase}

/* ---- FORMULA MARQUEE ---- */
.marquee{overflow:hidden;background:var(--paper-2);border-block:1px solid var(--line);padding:11px 0}
.mtrack{display:flex;width:max-content;animation:mar 40s linear infinite}
.mseg{display:flex;gap:40px;padding-right:40px;font-family:var(--m);font-size:.78rem;letter-spacing:.06em;color:var(--teal);white-space:nowrap}
.mseg i{font-style:normal;color:var(--amber)}
@keyframes mar{to{transform:translateX(-50%)}}

/* ---- ABOUT ---- */
.letter{background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:clamp(24px,5vw,48px);margin-top:30px;position:relative;box-shadow:0 20px 44px -30px rgba(28,38,34,.35)}
.letter::before{content:"GIVEN:";font-family:var(--m);font-size:.68rem;letter-spacing:.16em;color:var(--teal)}
.letter::after{content:"∎";position:absolute;bottom:20px;right:24px;font-size:1.6rem;color:var(--line)}
.letter p{margin-top:16px;max-width:64ch;color:var(--muted)}
.letter p:first-of-type::first-letter{font-family:var(--d);font-size:3em;float:left;line-height:.8;padding-right:10px;color:var(--teal)}
.letter .sig{font-family:var(--d);font-style:italic;font-size:1.4rem;color:var(--ink);margin-top:22px;display:block}

/* ---- SKILLS — progress bars ---- */
.skills{display:grid;gap:12px;margin-top:30px;grid-template-columns:1fr}
.skill{background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:18px 20px;transition:.3s var(--ease)}
.skill:hover{transform:translateY(-3px);border-color:var(--teal);box-shadow:0 16px 30px -22px rgba(31,138,109,.5)}
.skill .top{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.skill b{font-family:var(--d);font-size:1.12rem;font-weight:600}
.skill small{color:var(--muted);display:block;font-size:.78rem}
.skill .pct{font-family:var(--m);font-size:.78rem;color:var(--teal);font-weight:700}
.bar{margin-top:12px;height:8px;border-radius:999px;background:var(--paper-2);overflow:hidden;position:relative}
.bar i{position:absolute;left:0;top:0;bottom:0;width:0;border-radius:999px;background:linear-gradient(90deg,var(--teal),var(--chalk-y));transition:width 1.2s var(--ease)}
@media(min-width:768px){.skills{grid-template-columns:1fr 1fr}}

/* ---- METHOD — coordinate plane ---- */
.method{background:linear-gradient(160deg,var(--board-2),var(--board));border:6px solid var(--card);outline:1.5px solid var(--line);border-radius:16px;padding:clamp(20px,4vw,34px);margin-top:32px;color:var(--chalk);position:relative;overflow:hidden;box-shadow:0 30px 60px -30px rgba(14,42,36,.7)}
.method .cap{font-family:var(--m);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--chalk-y);margin-bottom:18px;display:block;position:relative}
.mgrid{display:grid;gap:26px;align-items:center;position:relative}
.plane{justify-self:center;width:min(300px,82vw)}
.plane svg{width:100%;height:auto;display:block}
.pl-grid{stroke:rgba(143,208,232,.18);stroke-width:1}
.pl-ax{stroke:rgba(143,208,232,.6);stroke-width:2}
.pl-curve{stroke:var(--chalk-y);stroke-width:3;fill:none;stroke-linecap:round;stroke-dasharray:600;stroke-dashoffset:600}
.pl-curve.go{animation:draw2 2.2s var(--ease) forwards}
@keyframes draw2{to{stroke-dashoffset:0}}
.pl-dot{fill:var(--chalk-r)}
.pl-lab{font-family:'JetBrains Mono',monospace;font-size:12px;fill:var(--chalk-blue)}
.method .phil{font-size:.96rem;color:rgba(243,240,228,.82);max-width:56ch}
.method .phil b{color:#fff}
.method .steps{margin-top:16px;display:grid;gap:8px;font-size:.86rem;color:rgba(243,240,228,.8);counter-reset:step}
.method .steps li{list-style:none;display:flex;gap:10px;align-items:baseline}
.method .steps li::before{content:counter(step,decimal-leading-zero);counter-increment:step;font-family:var(--m);font-size:.66rem;color:var(--chalk-y)}
@media(min-width:768px){.mgrid{grid-template-columns:.95fr 1.05fr}}

/* ---- EDUCATION ---- */
.edu{margin-top:30px;display:grid;gap:12px}
.deg{background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:22px;display:grid;gap:6px;position:relative;overflow:hidden;transition:.3s var(--ease)}
.deg:hover{transform:translateY(-3px)}
.deg::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(var(--teal),var(--chalk-y))}
.deg .yrs{font-family:var(--m);font-size:.7rem;color:var(--amber);font-weight:700;letter-spacing:.06em}
.deg h3{font-size:1.25rem}
.deg .inst{color:var(--teal);font-weight:700;font-size:.86rem}
.deg .perf{display:inline-flex;align-items:center;gap:7px;font-family:var(--m);font-size:.68rem;color:var(--teal-deep);background:#E4F0EA;border-radius:999px;padding:4px 12px;width:fit-content;font-weight:700}
.deg .perf::before{content:"∑"}
@media(min-width:768px){.edu{grid-template-columns:1fr 1fr}}

/* ---- CERTS ---- */
.certs{display:grid;gap:12px;margin-top:30px}
.cert{background:var(--card);border:1.5px dashed var(--amber);border-radius:10px;padding:18px;position:relative}
.cert::after{content:"Q.E.D.";position:absolute;top:12px;right:12px;font-family:var(--m);font-size:.54rem;letter-spacing:.14em;color:var(--amber);border:1px solid var(--amber);border-radius:4px;padding:3px 7px;transform:rotate(4deg)}
.cert b{font-family:var(--d);display:block;font-size:1.05rem;padding-right:70px;line-height:1.25}
.cert span{font-size:.76rem;color:var(--muted)}
@media(min-width:768px){.certs{grid-template-columns:repeat(3,1fr)}}

/* ---- EXPERIENCE — number line ---- */
.line{margin-top:36px;position:relative;padding-left:46px}
.line::before{content:"";position:absolute;left:13px;top:8px;bottom:8px;border-left:2px solid var(--teal)}
.node{position:relative;padding-bottom:38px}
.node:last-child{padding-bottom:0}
.node::before{content:"";position:absolute;left:-40px;top:6px;width:16px;height:16px;border-radius:50%;background:var(--card);border:3px solid var(--teal)}
.node::after{content:"";position:absolute;left:-33px;top:-2px;height:2px;width:14px;background:var(--teal)}
.node:first-child::before{background:var(--chalk-y);border-color:var(--amber)}
.node .yr{font-family:var(--m);font-size:.7rem;color:var(--amber);font-weight:700;letter-spacing:.06em}
.node h3{font-size:1.3rem;margin:4px 0 2px}
.node .org{font-size:.86rem;color:var(--teal);font-weight:700;margin-bottom:6px}
.node p{color:var(--muted);font-size:.92rem;max-width:58ch}

/* ---- AWARDS ---- */
.aw{display:flex;justify-content:space-between;gap:12px;padding:18px 4px;border-bottom:1px dashed var(--line);flex-wrap:wrap;align-items:baseline}
.aw .t{font-family:var(--d);font-size:1.2rem;font-weight:600}
.aw .t::before{content:"√ ";color:var(--teal);font-family:var(--m)}
.aw .n{color:var(--muted);font-size:.84rem;flex-basis:100%;padding-left:24px}
.aw .y{font-family:var(--m);color:var(--amber);font-weight:700;font-size:.72rem}

/* ---- GALLERY ---- */
.gal{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:30px}
.shot{aspect-ratio:4/3;border-radius:12px;border:1.5px solid var(--line);position:relative;overflow:hidden;transition:.35s var(--ease)}
.shot:hover{transform:translateY(-4px)}
.shot .cap{position:absolute;inset-inline:0;bottom:0;background:linear-gradient(transparent,rgba(10,31,26,.88));color:var(--chalk);font-size:.74rem;padding:26px 14px 12px}
.mg1{background:linear-gradient(150deg,#BFE0D4,var(--teal))}.mg2{background:linear-gradient(150deg,#F2D89C,var(--amber))}
.mg3{background:linear-gradient(150deg,#C6BBE6,var(--plum))}.mg4{background:linear-gradient(150deg,#A9D6E6,#3B7E96)}
.mg5{background:linear-gradient(150deg,#EBB6A6,var(--chalk-r))}.mg6{background:linear-gradient(150deg,#B7CFC7,var(--teal-deep))}
@media(min-width:768px){.gal{grid-template-columns:repeat(3,1fr)}}

/* ---- BLOG ---- */
.blog{display:grid;gap:12px;margin-top:30px}
.post{background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:22px;transition:.3s var(--ease)}
.post:hover{transform:translateY(-4px);border-color:var(--teal)}
.post .dt{font-family:var(--m);font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;color:var(--amber)}
.post h3{font-size:1.2rem;margin-block:8px 6px}
.post p{font-size:.86rem;color:var(--muted)}
.post .more{display:inline-block;margin-top:12px;font-size:.76rem;font-weight:700;color:var(--teal)}
@media(min-width:768px){.blog{grid-template-columns:repeat(3,1fr)}}

/* ---- TESTIMONIALS ---- */
.tst{display:grid;gap:12px;margin-top:30px}
.tq{background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:24px;position:relative}
.tq::before{content:"“";position:absolute;top:6px;right:18px;font-family:var(--d);font-size:4rem;color:var(--line);line-height:1}
.tq p{font-family:var(--d);font-style:italic;font-size:1.1rem;margin-bottom:14px;line-height:1.45}
.tq b{font-size:.86rem}
.tq span{display:block;font-size:.74rem;color:var(--muted)}
@media(min-width:768px){.tst{grid-template-columns:repeat(3,1fr)}}

/* ---- HIRE (job prefs) ---- */
.invite{background:var(--board);color:var(--chalk);border-radius:18px;margin-top:32px;padding:clamp(26px,5vw,46px);position:relative;overflow:hidden;box-shadow:0 34px 64px -30px rgba(14,42,36,.7)}
.invite::before{content:"";position:absolute;inset:0;opacity:.4;pointer-events:none;
 background-image:linear-gradient(rgba(143,208,232,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(143,208,232,.08) 1px,transparent 1px);background-size:24px 24px}
.invite h3{font-family:var(--m);font-size:.72rem;letter-spacing:.18em;color:var(--chalk-y);margin-bottom:4px;text-transform:uppercase;position:relative}
.invite .win{font-family:var(--m);font-size:.64rem;color:rgba(243,240,228,.55);margin-bottom:20px;letter-spacing:.08em;position:relative}
.prow{display:flex;justify-content:space-between;gap:14px;padding:13px 0;border-bottom:1px dashed rgba(243,240,228,.2);font-size:.92rem;flex-wrap:wrap;position:relative}
.prow span{color:rgba(243,240,228,.6);font-family:var(--m);font-size:.7rem;text-transform:uppercase;letter-spacing:.06em}
.prow b{text-align:right;overflow-wrap:anywhere}
.prow .yes{color:var(--chalk-y)}
.refs{display:grid;gap:10px;margin-top:18px;position:relative}
.ref{border:1px solid rgba(243,240,228,.2);border-radius:12px;padding:14px 18px;font-size:.86rem}
.ref b{font-family:var(--d);font-size:1.05rem}
.ref span{display:block;color:rgba(243,240,228,.6);font-size:.74rem}
@media(min-width:768px){.refs{grid-template-columns:1fr 1fr}}

/* ---- CONTACT + QR ---- */
.contact-grid{display:grid;gap:24px;margin-top:30px;align-items:center}
.cbox{background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 18px 40px -28px rgba(28,38,34,.4)}
.crow2{display:flex;align-items:flex-start;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line);font-size:.9rem}
.crow2:last-child{border:none}
.crow2 svg{width:18px;height:18px;color:var(--teal);flex-shrink:0;margin-top:3px}
.crow2 b{display:block;font-size:.68rem;color:var(--muted);font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.qr{justify-self:center;text-align:center}
.qr svg{width:150px;height:150px;border:1.5px solid var(--ink);border-radius:10px;background:#fff;padding:10px}
.qr p{font-size:.74rem;color:var(--muted);margin-top:12px;max-width:22ch;margin-inline:auto}
@media(min-width:768px){.contact-grid{grid-template-columns:1.2fr .8fr}}
.fin-cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px;justify-content:center}

footer{border-top:1px solid var(--line);padding:22px;text-align:center;font-size:.75rem;color:var(--muted)}
footer a{color:var(--teal);font-weight:700}
.stick{position:fixed;inset-inline:0;bottom:0;z-index:70;background:color-mix(in srgb,var(--paper) 94%,transparent);backdrop-filter:blur(12px);border-top:2px solid var(--ink);padding:10px 16px calc(10px + env(safe-area-inset-bottom));display:flex;gap:10px;transform:translateY(110%);transition:transform .4s var(--ease)}
.stick.show{transform:none}
.stick .btn{flex:1;min-height:48px}
@media(min-width:768px){.stick{display:none}}
.contact-form-wrap{margin-top:22px;max-width:520px;margin-left:auto;margin-right:auto}
.contact-form .form_group{margin-bottom:12px}
.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(0,0,0,.12);font:inherit;background:#fff}
.contact-form textarea{min-height:110px;resize:vertical}
.text-danger{color:#c0392b;font-size:.8rem;margin-top:4px}