/* Home uses the original logo's blue/purple on neutral reading surfaces. */
.portal-home{--home-ink:#1d2940;--home-muted:#596375;--home-line:#e1e4eb;--home-blue:#146fa8;--home-purple:#92278f;background:#fff;color:var(--home-ink)}
.portal-home .sk-header{background:#fffffff5;border-color:var(--home-line)}
.portal-home .portal-footer{background:#f7f7fa;border-color:var(--home-line)}
.portal-home .sk-kicker{font-size:11px;font-weight:700;letter-spacing:.1em;line-height:1.5;color:var(--home-muted);margin:0 0 18px}
.portal-home .sk-welcome{max-width:1280px;margin:auto;padding:54px 48px 58px;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.portal-home .sk-welcome h1{font-size:clamp(54px,6.1vw,80px);font-weight:650;letter-spacing:-.055em;line-height:1.04;margin:0 0 24px}
.portal-home .sk-welcome h1 span{color:var(--home-purple)}
.portal-home .sk-welcome-lead{font-size:18px;line-height:1.7;color:var(--home-muted);margin:0 0 30px}
.sk-entry-actions{display:flex;gap:10px;flex-wrap:wrap}
.portal-home .sk-entry{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:12px;padding:15px 18px;font-size:14px;font-weight:600;min-height:52px;border:1px solid var(--home-line);transition:transform .2s,background .2s}
.sk-entry>svg{width:21px;height:21px}.sk-entry>span{font-size:20px;margin-left:10px}
.portal-home .sk-entry.primary{background:var(--home-blue);border-color:var(--home-blue);color:#fff}
.portal-home .sk-entry.secondary{background:#fff;color:var(--home-ink)}
.portal-home .sk-entry:hover{transform:translateY(-2px)}
.portal-home .sk-entry.primary:hover{background:#105d90}
.portal-home .sk-entry.secondary:hover{background:#f7f7fa}
.portal-home .sk-free-link{display:inline-flex;align-items:center;gap:9px;font-size:12px;color:var(--home-muted);margin-top:24px;min-height:32px}
.sk-free-dot{width:6px;height:6px;background:var(--home-purple);border-radius:50%}.sk-free-link>span:last-child{margin-left:6px}
.sk-mini-lab{min-width:0;background:#fff;border:1px solid var(--home-line);border-radius:22px;box-shadow:0 16px 48px #2830510b;overflow:hidden}
.sk-lab-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:18px 24px 14px}
.sk-lab-bar>span{font-size:10px;letter-spacing:.1em;font-weight:700;color:var(--home-muted)}
.sk-lab-tabs{display:flex;gap:3px;border-radius:9px;background:#f2f2f7;padding:3px}
.sk-lab-tabs button{font:600 12px Arial;border:0;cursor:pointer;padding:9px 11px;border-radius:7px;background:transparent;color:#596375;min-height:44px}
.sk-lab-tabs button[aria-pressed=true]{background:#fff;color:#762373;box-shadow:0 1px 5px #27314a15}
.sk-lab-panel h2{font-size:21px;letter-spacing:-.55px;font-weight:600;margin:8px 24px 15px}
.sk-lab-stage{position:relative;margin:0 24px;background:#f8f8fc;border:1px solid #e8e8f0;border-radius:12px;overflow:hidden}
.sk-lab-stage>svg{display:block;width:100%;height:auto;aspect-ratio:400/210}
.sk-lab-result{position:absolute;left:14px;top:13px;display:flex;flex-direction:column;gap:5px;pointer-events:none}
.sk-lab-result>span{font-size:8px;letter-spacing:.08em;color:#596375;font-weight:700}
.sk-lab-result>output{font-size:22px;letter-spacing:-.6px;font-weight:600;color:#762373}
.sk-lab-result small{font-size:13px;font-weight:500}
.math-result>output{color:#146fa8;font-size:17px;background:#f8f8fcdf;border-radius:4px}
.sk-lab-control{padding:16px 24px 0}
.sk-lab-control label{display:flex;justify-content:space-between;gap:12px;align-items:center;font-size:12px;font-weight:600;margin-bottom:3px}
.sk-lab-control label output{color:#762373}
.sk-lab-control input{display:block;width:100%;height:44px;margin:0;cursor:pointer;accent-color:#92278f}
#lab-math .sk-lab-control input{accent-color:#146fa8}
.sk-range-labels{display:flex;justify-content:space-between;font-size:10px;color:#596375}
.portal-home .sk-lab-insight{font-size:12px;line-height:1.5;margin:12px 24px 18px;color:#596375}
.sk-lab-insight strong{color:#1d2940;font-weight:600}
.portal-home .sk-lab-more{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--home-line);padding:14px 24px;font-size:12px;color:#146fa8;background:#fcfcfe;min-height:47px}
.sk-lab-more>span{font-size:20px}.sk-lab-noscript{font-size:12px;padding:0 24px}
.sk-exam-shelf{max-width:1280px;padding:32px 48px 54px;margin:auto;scroll-margin-top:100px}
.sk-shelf-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}
.portal-home .sk-shelf-heading .sk-kicker{margin-bottom:10px}
.sk-shelf-heading h2{font-size:34px;letter-spacing:-1.3px;font-weight:600;margin:0}
.portal-home .sk-shelf-heading>a{display:inline-flex;gap:17px;font-size:13px;padding:10px 0;align-items:center;color:#146fa8;white-space:nowrap}
.sk-shelf-heading>a>span{font-size:20px}
.sk-book-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.sk-book-card{min-width:0;display:block}
.sk-book-art{position:relative;display:flex;align-items:end;justify-content:center;overflow:hidden;aspect-ratio:1.04;border:1px solid #e8e8f0;background:#f0f0f7;border-radius:14px;padding:40px 26px 0;transition:background .2s}
.book-matematik{background:#eef4fa}.book-fen{background:#eef3f3}.book-sosyal{background:#f6f1ee}
.sk-book-art img{display:block;width:82%;max-width:175px;height:auto;box-shadow:7px 6px 15px #19233d25;transform:rotate(-6deg) translateY(16px);transition:transform .25s;transform-origin:bottom center}
.sk-book-card:nth-child(even) img{transform:rotate(6deg) translateY(16px)}
.sk-book-card:hover img{transform:rotate(0deg) translateY(6px)}
.sk-book-badge{position:absolute;top:15px;left:15px;font-size:9px;font-weight:700;letter-spacing:.05em;color:#536074}
.sk-book-info{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:18px 2px}
.sk-book-info h3{font-size:18px;font-weight:600;letter-spacing:-.4px;margin:0 0 8px}
.sk-book-info p{font-size:11px;color:#596375;margin:0;line-height:1.6}
.sk-book-info>span{font-size:23px;color:#146fa8}
.sk-visual-links{max-width:1184px;margin:0 auto 56px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--home-line);border-bottom:1px solid var(--home-line)}
.portal-home .sk-visual-links>a{display:flex;align-items:center;gap:13px;padding:27px 20px;border-right:1px solid var(--home-line);transition:background .2s}
.portal-home .sk-visual-links>a:last-child{border-right:0}.portal-home .sk-visual-links>a:hover{background:#fafafd}
.sk-link-graphic{display:block;width:64px;flex:none}.sk-link-graphic svg{display:block;width:100%;height:auto;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.graphic-video svg{fill:#e9f0f9;stroke:#1475bc}.graphic-video svg path{fill:#1475bc;stroke:none}
.graphic-plan svg{fill:#f1e6f3;stroke:#92278f}.graphic-plan svg path{fill:none}
.graphic-links svg{fill:#edf0f5;stroke:#596b8b}.graphic-links svg path{fill:none}
.sk-visual-links strong{font-size:15px;display:block;margin-bottom:8px;font-weight:600}.sk-visual-links small{display:block;font-size:11px;line-height:1.6;color:#596375}
.sk-visual-links>a>span:last-child{font-size:21px;color:#596375;margin-left:auto}
@media(max-width:1100px){.portal-home .sk-welcome{padding:42px 32px;gap:35px}.portal-home .sk-welcome h1{font-size:64px}.portal-home .sk-entry{padding:14px;font-size:13px}.sk-entry>span{margin-left:0}.sk-entry-actions{gap:8px}.sk-exam-shelf{padding:28px 32px 40px}.sk-book-grid{gap:16px}.sk-book-art{padding-inline:16px}.sk-visual-links{margin-inline:32px}.portal-home .sk-visual-links>a{padding:23px 13px;gap:10px}.sk-link-graphic{width:48px}.sk-visual-links strong{font-size:14px}.sk-visual-links small{font-size:10px}}
@media(max-width:800px){.portal-home .sk-welcome{grid-template-columns:1fr;padding:28px 24px 30px;gap:26px;max-width:650px}.portal-home .sk-welcome-copy{text-align:left}.portal-home .sk-kicker{font-size:10px;margin-bottom:13px}.portal-home .sk-welcome h1{font-size:48px;letter-spacing:-2.2px;margin-bottom:15px}.portal-home .sk-welcome-lead{font-size:15px;line-height:1.6;margin-bottom:19px}.portal-home .sk-welcome-lead br{display:none}.portal-home .sk-entry{font-size:13px;min-height:49px;padding:13px 17px}.sk-entry-actions{gap:10px}.portal-home .sk-free-link{margin-top:13px;font-size:11px}.sk-lab-bar{padding:15px 20px 10px}.sk-lab-panel h2{margin:6px 20px 12px;font-size:20px}.sk-lab-stage{margin-inline:20px}.sk-lab-stage>svg{max-height:235px}.sk-lab-control{padding:12px 20px 0}.portal-home .sk-lab-insight{margin:10px 20px 14px}.portal-home .sk-lab-more{padding-inline:20px}.sk-exam-shelf{padding:22px 24px 30px;max-width:650px}.sk-shelf-heading{margin-bottom:20px}.sk-shelf-heading h2{font-size:29px}.sk-book-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.sk-book-art{aspect-ratio:1.1;padding:37px 18px 0}.sk-book-art img{max-width:150px}.sk-book-info{padding:14px 1px}.sk-book-info h3{font-size:16px;margin-bottom:6px}.sk-book-info p{font-size:10px}.sk-book-badge{font-size:8px;left:12px;top:13px}.sk-visual-links{grid-template-columns:1fr;margin:0 24px 35px}.portal-home .sk-visual-links>a{padding:17px 8px;border-right:0;border-bottom:1px solid var(--home-line);gap:15px}.portal-home .sk-visual-links>a:last-child{border-bottom:0}.sk-link-graphic{width:52px}.sk-visual-links strong{font-size:15px;margin-bottom:5px}.sk-visual-links small{font-size:12px}}
@media(max-width:380px){.portal-home .sk-welcome{padding-inline:16px}.portal-home .sk-welcome h1{font-size:43px}.portal-home .sk-entry{padding:12px 13px;gap:7px;font-size:12px}.sk-entry svg{width:18px}.sk-lab-bar{padding-inline:15px}.sk-lab-tabs button{padding:8px}.sk-lab-panel h2{margin-inline:15px;font-size:18px}.sk-lab-stage{margin-inline:15px}.sk-lab-control{padding-inline:15px}.sk-lab-result>output{font-size:19px}.math-result>output{font-size:15px}.portal-home .sk-lab-insight{margin-inline:15px;font-size:11px}.portal-home .sk-lab-more{font-size:11px;padding-inline:15px}.sk-exam-shelf{padding-inline:16px}.sk-shelf-heading h2{font-size:26px}.sk-book-grid{gap:12px}.sk-book-art{padding-inline:9px}.sk-book-info h3{font-size:15px}.sk-book-info p{font-size:9px}.sk-visual-links{margin-inline:16px}}
@media(prefers-reduced-motion:reduce){.portal-home *{transition:none!important;scroll-behavior:auto!important}}

/* A visual, functional entrance to every discipline. */
.portal-home .sk-welcome{gap:48px;padding-top:44px;padding-bottom:44px;grid-template-columns:.95fr 1.05fr}
.portal-home .sk-welcome h1{font-size:clamp(50px,5.4vw,71px);line-height:1.08;letter-spacing:-.055em}
.portal-home .sk-welcome h1 span{display:inline-block;background:linear-gradient(100deg,#126b9f 4%,#92278f 94%);color:transparent;background-clip:text;-webkit-background-clip:text}
.sk-discovery{position:relative;background:#eff3fb;border:1px solid #e2e8f2;border-radius:26px;padding:25px;min-width:0}
.sk-discovery-top{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:10px;font-weight:700;letter-spacing:.08em;color:#4a5873}
.sk-branch-count{color:#fff;background:#263c68;padding:7px 10px;border-radius:20px;white-space:nowrap;font-size:10px;letter-spacing:0}
.sk-discovery h2{font-size:29px;letter-spacing:-1px;line-height:1.15;margin:20px 0 23px;font-weight:600}
.sk-discovery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.tone-blue{--tile-bg:#dcedff;--tile-ink:#145485;--tile-accent:#2d82cf}
.tone-purple{--tile-bg:#efe2f7;--tile-ink:#6e267f;--tile-accent:#9b4db4}
.tone-teal{--tile-bg:#d9f1e9;--tile-ink:#155b50;--tile-accent:#2c8f7b}
.tone-orange{--tile-bg:#ffead3;--tile-ink:#86431b;--tile-accent:#c98148}
.portal-home .sk-subject-card{background:var(--tile-bg);color:var(--tile-ink);border-radius:14px;padding:15px 12px 14px;min-width:0;transition:transform .2s,box-shadow .2s}
.sk-subject-art{display:flex;justify-content:space-between;align-items:start;margin-bottom:17px}
.sk-subject-art>svg{width:35px;height:35px;stroke-width:1.5;transition:transform .2s}
.sk-subject-art>span{font-size:18px;opacity:.75;transition:transform .2s}
.sk-subject-card strong{display:block;font-size:13px;line-height:1.5;font-weight:700;white-space:nowrap}
.sk-subject-card small{display:block;font-size:9px;line-height:1.5;margin-top:3px}
.sk-subject-card:is(:hover,:focus-visible){transform:translateY(-4px);box-shadow:0 8px 14px #223c6814}
.sk-subject-card:is(:hover,:focus-visible) .sk-subject-art>svg{transform:rotate(-7deg)}
.sk-subject-card:is(:hover,:focus-visible) .sk-subject-art>span{transform:translate(2px,-2px)}
.portal-home .sk-discovery-all{display:flex;align-items:center;justify-content:space-between;min-height:48px;margin-top:16px;padding:9px 15px;background:#263c68;color:#fff;border-radius:10px;font-size:12px;font-weight:600;transition:background .2s}
.portal-home .sk-discovery-all:hover{background:#146fa8}.sk-discovery-all>span{font-size:23px}
.sk-discovery-roles{display:flex;gap:12px;justify-content:space-between;margin-top:7px}
.portal-home .sk-discovery-roles a{font-size:10px;color:#4a5873;display:flex;align-items:center;min-height:36px}
.sk-discovery-roles a:hover{text-decoration:underline}
@media(max-width:1100px){.portal-home .sk-welcome{gap:26px}.portal-home .sk-welcome h1{font-size:57px}.sk-discovery{padding:20px}.sk-subject-card strong{font-size:12px}.sk-subject-card small{font-size:8px}.portal-home .sk-subject-card{padding:13px 10px}.sk-discovery-grid{gap:8px}}
@media(max-width:800px){.portal-home .sk-welcome{grid-template-columns:1fr;padding:30px 24px;gap:27px}.portal-home .sk-welcome h1{font-size:52px}.sk-discovery h2{font-size:29px;margin:17px 0 20px}.portal-home .sk-subject-card{padding:16px 13px}.sk-subject-card strong{font-size:13px}.sk-subject-card small{font-size:10px}.sk-subject-art{margin-bottom:17px}.sk-subject-art>svg{width:37px;height:37px}.sk-discovery-roles{margin-top:9px}.portal-home .sk-discovery-roles a{min-height:44px;font-size:11px}}
@media(max-width:430px){.portal-home .sk-welcome{padding-inline:18px}.portal-home .sk-welcome h1{font-size:45px}.sk-discovery{padding:17px;border-radius:20px}.sk-discovery-grid{gap:7px}.portal-home .sk-subject-card{padding:13px 9px}.sk-subject-art>svg{width:29px;height:29px}.sk-subject-art{margin-bottom:12px}.sk-subject-card strong{font-size:11px}.sk-subject-card small{font-size:8px}.sk-discovery h2{font-size:27px}.portal-home .sk-discovery-roles a{font-size:9px}.sk-discovery-top{font-size:9px}.sk-branch-count{font-size:9px}}
@media(prefers-reduced-motion:reduce){.portal-home *{animation:none!important;transition:none!important}}