:root{--paper:#f7f7f2;--ink:#202c29;--muted:#5d6761;--line:#d9ddd5;--orange:#c44324;--brand:#e6532f;--lime:#dde89c;--white:#fff;--serif:Georgia,'Times New Roman',serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:16px;line-height:1.6}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:default}a:hover{color:var(--orange)}button:hover{filter:brightness(.96)}:focus-visible{outline:3px solid var(--orange);outline-offset:5px}h1,h2,h3,p{margin:0}h1,h2,h3{font-weight:400}h1,h2{font-family:var(--serif);line-height:1.08;letter-spacing:-.035em}h1{font-size:clamp(3rem,5.8vw,5.4rem)}h2{font-size:clamp(2rem,3.2vw,3rem)}h3{font-size:1.35rem;line-height:1.3}.wrap{width:min(1280px,calc(100% - 96px));margin:auto}.site-header{border-bottom:1px solid var(--line)}.header-inner{min-height:98px;display:flex;align-items:center;gap:35px}.brand{font-size:1.65rem;letter-spacing:-1.3px;font-weight:800;white-space:nowrap}.brand-dot{color:var(--brand)}.brand-product{font-family:var(--serif);font-weight:400;letter-spacing:-.8px;border-left:1px solid #acb3aa;margin-left:12px;padding-left:12px}.header-inner nav{display:flex;gap:28px;margin-left:auto;font-size:.9rem}.header-inner nav a{padding:14px 0}.language{font-size:.8rem;font-weight:bold;white-space:nowrap}.language span{color:var(--muted);font-size:.75rem;font-weight:400}.eyebrow{text-transform:uppercase;font-size:.75rem;font-weight:700;letter-spacing:2px;display:block}.eyebrow.accent{color:var(--orange)}.hero{display:grid;grid-template-columns:1.35fr 1fr;gap:80px;padding:68px 0 62px;align-items:center}.hero h1{margin:23px 0}.hero h1 em{color:var(--orange);font-weight:400}.intro{font-size:1.08rem;color:var(--muted);max-width:520px}.search-form{background:white;display:flex;border:1px solid #a6afa4;padding:7px;margin-top:28px;border-radius:4px;gap:8px;box-shadow:0 4px 0 #e6e8df}.search-icon{font-size:1.8rem;padding:0 10px;align-self:center}.search-form input{min-width:0;flex:1;border:0;background:none;outline-offset:0;padding:9px 0;color:var(--ink)}.solid{border:0;background:var(--ink);color:white;padding:12px 22px;border-radius:3px;font-weight:600}.search-form .solid{background:var(--brand);color:#fff}.suggestions{display:flex;gap:13px;flex-wrap:wrap;font-size:.8rem;margin-top:16px;color:var(--muted)}.suggestions a{border-bottom:1px solid #aeb6a9}.feature{background:var(--ink);color:white;padding:30px 32px 26px;position:relative;box-shadow:12px 12px 0 #e2e5d8;transform:rotate(1.2deg)}.feature>*{transform:rotate(-1.2deg)}.feature 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#89958b;padding-bottom:3px;white-space:nowrap}.categories{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.category{padding:24px 25px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;gap:15px;align-items:center;background:transparent;transition:background .2s}.category:hover{background:#edf0e4}.category .symbol{font-family:var(--serif);font-size:1.8rem;color:var(--orange);width:34px}.category strong{display:block;font-size:.95rem;font-weight:500}.category small{color:var(--muted);font-size:.75rem}.category .arrow{margin-left:auto}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:#fff;border:1px solid var(--line);padding:26px;display:flex;flex-direction:column;min-height:260px;transition:transform .2s,box-shadow .2s}.card:hover{transform:translateY(-4px);box-shadow:0 10px 24px 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0;border-bottom:1px solid var(--line);scroll-margin-top:30px}.article-section h2{font-size:2rem;margin-bottom:20px}.article-section p{font-size:1.08rem;line-height:1.85}.example{background:#eaf0de;padding:28px;margin:25px 0}.example .eyebrow{margin-bottom:12px}.research-note{border-left:3px solid var(--brand);padding:5px 0 5px 25px;margin:28px 0}.research-note .eyebrow{color:var(--orange);margin-bottom:10px}.aside{padding-top:40px}.aside-box{border-top:2px solid var(--ink);padding:20px 0;margin-bottom:25px}.aside-box a{display:block;padding:10px 0;border-bottom:1px solid var(--line);font-size:.9rem}.quiz{background:#fff;border:1px solid var(--line);padding:26px}.quiz h3{font-family:var(--serif);font-size:1.6rem;margin:14px 0 20px}.quiz-buttons{display:flex;gap:12px}.quiz button{padding:10px 22px;background:var(--paper);border:1px solid #94a08c;border-radius:3px}.quiz-feedback{margin-top:18px;color:var(--ink)}.quiz-feedback:empty{display:none}.path-list{display:grid;gap:12px;margin-top:30px}.path-step{display:flex;align-items:center;gap:25px;padding:25px;background:#fff;border:1px solid var(--line)}.path-step>span{font:2rem var(--serif);color:var(--orange)}.path-step small{display:block;color:var(--muted)}.path-step>b{margin-left:auto;font-weight:400}.skip{position:absolute;top:-100px;left:20px;z-index:10;background:#fff;padding:12px}.skip:focus{top:10px}dialog{border:1px solid var(--line);border-radius:5px;background:var(--paper);color:var(--ink);padding:38px;max-width:580px;width:calc(100% - 32px);max-height:90dvh}dialog::backdrop{background:#15251ecc;backdrop-filter:blur(3px)}dialog h2{font-size:2.2rem;margin:15px 25px 22px 0}dialog p{color:var(--muted);margin:15px 0}.close{position:absolute;right:16px;top:12px;background:none;border:0;font-size:1.8rem;line-height:1;padding:8px}label{display:block;font-size:.9rem;margin:16px 0 6px}.field{width:100%;border:1px solid #a1ad9b;background:white;padding:12px;border-radius:3px}.calc-result{margin:24px 0 0;padding:20px;background:#e5edce;font-size:1.1rem}.calc-result strong{font:2.5rem var(--serif);display:block}.small{font-size:.8rem!important}.tool-form .solid{margin-top:20px}.source{font-size:.9rem!important}.source a{text-decoration:underline}.badge{background:#e8eddf;padding:3px 10px;border-radius:20px;font-size:.75rem}@media(min-width:1500px){.hero{gap:110px;padding-top:85px;padding-bottom:80px}}@media(max-width:1100px){.wrap{width:calc(100% - 56px)}.header-inner{gap:20px;flex-wrap:wrap;padding:20px 0}.header-inner nav{gap:19px}.language{display:none}.hero{gap:40px}.feature{padding:25px}.sample-grid{padding:16px;gap:7px}.dot-grid{gap:6px}.categories{grid-template-columns:repeat(2,1fr)}.quick-inner{gap:24px;grid-template-columns:1fr 1.5fr}.quick-inner>.outline-light{grid-column:2;justify-self:start}.detail-grid{gap:35px;grid-template-columns:minmax(0,1fr) 220px}.footer-inner{flex-wrap:wrap}}@media(max-width:760px){.wrap{width:calc(100% - 36px)}.header-inner{display:block;padding:18px 0 9px}.brand{font-size:1.45rem}.header-inner nav{margin-top:12px;display:flex;overflow-x:auto;gap:22px;white-space:nowrap;font-size:.8rem}.header-inner nav a{padding:8px 0}.hero{grid-template-columns:1fr;padding:36px 0 38px;gap:35px}.hero h1{font-size:3.4rem}.intro{font-size:1rem}.feature{transform:none;box-shadow:6px 6px 0 #e2e5d8}.feature>*{transform:none}.feature h2{font-size:2.3rem}.diagram{justify-content:space-around}.dot-grid{gap:10px}.sample-grid{padding:22px;gap:10px}.principles{flex-wrap:wrap;justify-content:start;gap:10px 25px}.principles span:last-child{display:none}.section{padding:38px 0}.section-heading{align-items:start}.section-heading h2{font-size:2rem}.text-link{font-size:.78rem;white-space:normal;text-align:right}.category{padding:17px 13px;gap:9px}.category .symbol{font-size:1.4rem;width:24px}.category strong{font-size:.83rem}.category .arrow{display:none}.cards{grid-template-columns:1fr}.card{min-height:240px}.path-grid{grid-template-columns:1fr}.quick-inner{grid-template-columns:1fr;gap:25px}.quick-inner>.outline-light{grid-column:1}.quick-copy{border-left:0;padding-left:0;border-top:1px solid #536255;padding-top:20px}.quick-title{gap:25px}.quick-title h2{font-size:1.8rem}.quick-band{padding:30px 0}.tools-grid{grid-template-columns:1fr;gap:12px}.note-strip{display:block}.note-strip p{font-size:1.4rem;margin-top:18px}.footer-inner{display:block}.footer-inner p{margin:15px 0}.footer-bottom{gap:20px}.detail-grid{display:flex;flex-direction:column;gap:10px}.detail-hero h1,.page-head h1{font-size:3rem}.aside{padding:0}.results-bar{align-items:start;font-size:.85rem}.results-bar select{max-width:160px}.search-icon{padding:0 4px}.search-form .solid{padding:10px 15px}.path{padding:23px;grid-template-columns:40px 1fr;gap:12px}.path h3{font-size:1.6rem}.path-number{font-size:2.5rem}.path-bottom{gap:15px}.meta{flex-wrap:wrap;gap:8px 20px}dialog{padding:28px 22px}.page-head{padding-top:30px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;transform:none!important}}
@media(max-width:380px){.hero h1{font-size:2.7rem}.feature{padding:22px 18px}.feature h2{font-size:2rem}.dot-grid{gap:6px}.dot-grid i{width:6px;height:6px}.sample-grid{padding:16px;gap:7px}.diagram{gap:12px}.category{padding:14px 10px}.category .symbol{display:none}.header-inner nav{gap:17px}.search-form input{font-size:.85rem}.path{padding:20px 16px}.detail-hero h1,.page-head h1{font-size:2.5rem;overflow-wrap:anywhere}}
main:focus{outline:none}
.filter-fields{display:flex;gap:20px;align-items:end;flex-wrap:wrap;margin:20px 0}.filter-fields label{flex:1;min-width:160px}.filter-fields .filter,.filter-fields .text-link{margin-bottom:6px}.filter[aria-current=page]{background:var(--ink);color:white}.quick-cards .quiz{padding:15px;margin-bottom:20px}.quick-cards .quiz h3{font-family:Arial,sans-serif;font-size:1rem;letter-spacing:0}.quick-cards .text-link{margin-top:auto}.header-inner a[aria-current=page]{color:var(--orange)}
@media(max-width:760px){.quick-cards{grid-template-columns:1fr}.filter-fields{gap:12px}.filter-fields label{min-width:140px}}
.quick-cards .card{min-width:0}.quick-cards .quiz-buttons{flex-wrap:wrap}.quick-cards .quiz h3{overflow-wrap:anywhere}@media(max-width:1100px){.quick-cards{grid-template-columns:1fr}}
.language a{display:inline-block;padding:8px 6px;color:var(--muted)}.language a[aria-current=true]{color:var(--orange);text-decoration:underline;text-underline-offset:5px}.header-inner{position:relative}html[lang=en] .hero h1{font-size:clamp(2.7rem,5vw,4.6rem)}@media(max-width:1100px){.language{display:block}}@media(max-width:760px){.language{position:absolute;right:0;top:13px}.header-inner>.brand{display:inline-block;font-size:1.25rem}.language a{padding:8px 5px}.language span{font-size:.8rem}html[lang=en] .hero h1{font-size:2.8rem}}@media(max-width:380px){.header-inner>.brand{font-size:1.1rem}.brand-product{margin-left:8px;padding-left:8px}html[lang=en] .hero h1{font-size:2.4rem}}

/* Concept references */
.source-list{list-style:none;padding:0;margin:24px 0;border-top:1px solid var(--line)}
.source-list li{padding:20px 0;border-bottom:1px solid var(--line)}
.source-publisher{display:block;font-size:.82rem;line-height:1.6;margin-bottom:8px;color:var(--muted)}
.source-language{display:inline-block;font-size:.72rem;margin-left:8px;padding:2px 8px;border:1px solid currentColor;border-radius:20px}
.source-list a{font-size:1.05rem;line-height:1.5;text-decoration:underline;text-underline-offset:4px;overflow-wrap:anywhere}
#kaynaklar{scroll-margin-top:100px}

.footer-links{display:flex;flex-direction:column;gap:10px;align-items:flex-start}.footer-links a{overflow-wrap:anywhere}

[hidden]{display:none!important}.reading-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin:22px 0}.saved-remove{margin-top:12px}[data-saved-item] .card{height:auto}[data-save-status]:not(:empty){margin:12px 0}

/* Learning path recap */
.review-intro{max-width:680px;margin:20px 0 28px;color:var(--muted)}.review-grid{display:grid;gap:28px}.review-grid article{min-width:0}.review-label{margin-bottom:10px}.review-grid .quiz{margin:0 0 12px}.path-review h2{max-width:760px}
@media(min-width:1050px){.review-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}

.learning-progress{padding:24px;border:1px solid var(--line);margin-bottom:24px;background:var(--white)}.learning-progress.compact{padding:0;border:0;margin:18px 0;background:none}.learning-progress progress{display:block;width:100%;height:8px;accent-color:var(--ink);margin:12px 0 18px}.learning-progress .small{margin-top:14px;color:var(--muted)}.learning-progress.compact p{font-size:.82rem}.read-badge{color:var(--ink);font:600 .75rem/1.4 Arial!important;border:1px solid var(--line);padding:5px 8px!important;white-space:nowrap}.path-step.is-read{border-left:4px solid var(--ink)}[data-read][aria-pressed=true]{background:var(--ink);color:white}.review-summary{margin-top:30px;padding:24px;border:1px solid var(--line);background:#e9eddf}.review-summary p{margin-top:12px}.review-summary ul{padding-left:20px}.review-summary li{margin:8px 0}.review-summary li a{text-decoration:underline;text-underline-offset:3px}.review-summary button{margin-top:16px}@media(max-width:600px){.path-step .read-badge{display:none!important}.learning-progress{padding:18px}}

.level-nav{margin-top:28px}.level-section{scroll-margin-top:24px;padding-bottom:64px}.level-section h2{margin-top:12px}.level-intro{max-width:720px;margin:20px 0 28px;color:var(--muted)}.path-preparation{padding:24px;border:1px solid var(--line);margin-bottom:24px}.path-preparation p,.path-preparation h3{margin:16px 0}.case-scenario{margin:24px 0}

.tool-form fieldset{min-width:0;border:1px solid var(--line);padding:16px;margin:16px 0}.tool-form legend{font-weight:bold;padding:0 8px}.advanced-summary{font:inherit;white-space:pre-wrap;overflow-wrap:anywhere;background:var(--paper);padding:18px}.advanced-related{display:flex;flex-wrap:wrap;gap:14px;margin-top:22px}[data-tool-result] h3{margin:22px 0 12px}[data-copy-status]{margin:12px 0}textarea.field{width:100%;resize:vertical}

.guide-count{margin:24px 0}.guide-detail{max-width:900px}.guide-steps{padding-left:28px;margin-top:24px}.guide-steps li{padding:14px 0 14px 8px;overflow-wrap:anywhere}.guide-steps li::marker{color:var(--orange);font-weight:bold}@media(min-width:901px) and (max-width:1250px){.header-inner{flex-wrap:wrap;padding:20px 0;gap:18px}.header-inner nav{order:3;width:100%;margin:0;justify-content:space-between}.header-inner .language{margin-left:auto}}

.concept-guides{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:18px;margin-top:24px}.concept-guides .card{min-width:0}

.exercise-answer{padding:20px;border:1px solid currentColor;border-radius:8px}.exercise-answer summary{cursor:pointer;font-weight:600}.exercise-answer p{margin-top:16px}.guide-steps li{overflow-wrap:anywhere}

.filter[aria-current="true"]{background:var(--ink);color:white}

/* Readable form text and consistent touch targets. */
.language a{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center}
.filter,.quiz-buttons button,summary{min-height:44px}
.filter{display:inline-flex;align-items:center;justify-content:center}
.footer-links{flex-wrap:wrap}.footer-links a{display:inline-flex;align-items:center;min-height:44px}
@media(max-width:760px){input,select,textarea,.search-form input{font-size:16px}.header-inner nav a{min-height:44px;display:inline-flex;align-items:center}.language{top:6px}}
.hero>*{min-width:0}
@media(max-width:760px){.hero h1{overflow-wrap:anywhere}.header-inner nav{flex-wrap:wrap;overflow:visible;gap:4px 16px}.header-inner{height:auto}.header-inner nav a{white-space:normal}}
@media(max-width:480px){.header-inner{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.header-inner>.brand{flex:1}.header-inner .brand-product{display:block;border:0;margin:0;padding:0;letter-spacing:0}.header-inner .language{position:static;margin-left:auto}.header-inner nav{order:3;width:100%;margin-left:0}}