/* Fen Simülasyonları — tasarım belirteçleri ve kabuk */
:root{
  --font:"Manrope",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --bg:#f6f5f2; --panel:#ffffff; --stage:#fbfaf8; --ink:#17191c; --ink2:#5f6670; --ink3:#9aa1a9; --line:#e6e4df; --line2:#d6d3cc;
  --accent:#17191c; --accent-ink:#ffffff; --accent-soft:#ecebe7;
  --ok:#1f9d55; --ok-soft:#e3f5ea; --no:#d64545; --no-soft:#fbe6e6; --warn:#d98c0c; --warn-soft:#fdf1da;
  --s1:#2f6fde; --s2:#e2552e; --s3:#1f9d55; --s4:#8a4fd6; --s5:#d98c0c; --s6:#10a3a6;
  --g3:#0f9d8f; --g4:#5a9e2f; --g5:#f08a24; --g6:#e2457a; --g7:#2f6fde; --g8:#7a4fd6;
  --r:14px; --r-sm:10px; --r-lg:22px; --shadow:0 1px 2px rgba(20,20,20,.04),0 8px 24px -12px rgba(20,20,20,.12);
  color-scheme:light;
}
html.dark{
  --bg:#101214; --panel:#17191c; --stage:#131518; --ink:#f1f0ec; --ink2:#a4aab2; --ink3:#6b727a; --line:#272a2f; --line2:#363a41;
  --accent:#f1f0ec; --accent-ink:#101214; --accent-soft:#23262b;
  --ok:#3fcf7a; --ok-soft:#14301f; --no:#ff6b6b; --no-soft:#3a1c1c; --warn:#f2b544; --warn-soft:#3a2d12;
  --s1:#6b9cff; --s2:#ff7a52; --s3:#49d786; --s4:#b08cff; --s5:#f2b544; --s6:#3fd0d3;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px -12px rgba(0,0,0,.6);
  color-scheme:dark;
}
[data-grade="3"]{--accent:var(--g3);--accent-ink:#fff;--accent-soft:color-mix(in oklab,var(--g3) 12%,var(--panel))}
[data-grade="4"]{--accent:var(--g4);--accent-ink:#fff;--accent-soft:color-mix(in oklab,var(--g4) 12%,var(--panel))}
[data-grade="5"]{--accent:var(--g5);--accent-ink:#fff;--accent-soft:color-mix(in oklab,var(--g5) 12%,var(--panel))}
[data-grade="6"]{--accent:var(--g6);--accent-ink:#fff;--accent-soft:color-mix(in oklab,var(--g6) 12%,var(--panel))}
[data-grade="7"]{--accent:var(--g7);--accent-ink:#fff;--accent-soft:color-mix(in oklab,var(--g7) 12%,var(--panel))}
[data-grade="8"]{--accent:var(--g8);--accent-ink:#fff;--accent-soft:color-mix(in oklab,var(--g8) 12%,var(--panel))}

*{box-sizing:border-box} [hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.5;font-feature-settings:"tnum","ss01";-webkit-font-smoothing:antialiased;
  padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
h1,h2,h3{margin:0;letter-spacing:-.02em;line-height:1.15;font-weight:700}
h1{font-size:clamp(30px,5vw,44px);letter-spacing:-.035em}
h2{font-size:22px} h3{font-size:16px}
p{margin:0}
.muted{color:var(--ink2)}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--ink2)}

/* kabuk */
.app{max-width:1200px;margin:0 auto;min-height:100dvh;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0 14px;position:sticky;top:0;z-index:10;background:color-mix(in oklab,var(--bg) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.02em}
.brand i{width:22px;height:22px;border-radius:7px;background:var(--accent);display:inline-block;position:relative}
.brand i::after{content:"";position:absolute;inset:6px;border-radius:50%;background:var(--accent-ink);opacity:.9}
.crumbs{display:flex;align-items:center;gap:8px;min-width:0;font-weight:600;font-size:15px;color:var(--ink2)}
.crumbs a:hover{color:var(--ink)}
.crumbs .sep{color:var(--ink3)}
.crumbs .cur{color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-actions{display:flex;gap:8px;align-items:center}
.look-switch{display:flex;gap:2px;padding:3px;border-radius:999px;border:1px solid var(--line);background:var(--panel)}
.look-switch button{border:0;background:transparent;color:var(--ink2);font:inherit;font-weight:700;font-size:12px;padding:7px 12px;border-radius:999px;cursor:pointer;white-space:nowrap}
.look-switch button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.look-switch button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .look-switch button{padding:7px 9px;font-size:11px} }
.look-note{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--ink2);margin:-8px 0 22px}
.look-note b{color:var(--ink)}
.icon-btn{width:40px;height:40px;border-radius:999px;border:1px solid var(--line);background:var(--panel);display:grid;place-items:center;cursor:pointer;color:var(--ink2)}
.icon-btn:hover{color:var(--ink);border-color:var(--line2)}
.icon-btn svg{width:18px;height:18px}
main{flex:1;padding-bottom:48px}
footer.site{padding:24px 0 40px;color:var(--ink3);font-size:13px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);margin-top:24px}

/* ana sayfa */
.hero{padding:56px 0 36px;max-width:720px}
.hero p{font-size:18px;color:var(--ink2);margin-top:14px;max-width:560px;text-wrap:pretty}
.grades{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:12px;margin:8px 0 40px}
.grade-card{display:flex;flex-direction:column;gap:18px;padding:22px 20px;border-radius:var(--r-lg);background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);transition:transform .15s,border-color .15s;min-height:150px;position:relative;overflow:hidden}
.grade-card:hover{transform:translateY(-2px);border-color:var(--line2)}
.grade-card .num{font-size:44px;font-weight:800;letter-spacing:-.05em;line-height:1;color:var(--accent)}
.grade-card .num small{font-size:16px;letter-spacing:0;font-weight:700;color:var(--ink2);margin-left:4px}
.grade-card .meta{font-size:13px;color:var(--ink2);font-weight:600;line-height:1.4}
.grade-card .meta b{color:var(--ink);display:block;font-size:14px}
.grade-card::after{content:"";position:absolute;right:-30px;top:-30px;width:110px;height:110px;border-radius:50%;background:var(--accent);opacity:.08}

/* sınıf sayfası */
.grade-head{padding:36px 0 24px;display:flex;flex-direction:column;gap:10px}
.grade-head .kicker{display:flex;align-items:center;gap:10px}
.grade-head .dot{width:12px;height:12px;border-radius:50%;background:var(--accent)}
.grade-head p{color:var(--ink2);max-width:640px;text-wrap:pretty}
.search{position:relative;max-width:420px;margin:6px 0 18px}
.search input{width:100%;padding:12px 14px 12px 40px;border-radius:999px;border:1px solid var(--line);background:var(--panel);font:inherit;color:var(--ink)}
.search input::placeholder{color:var(--ink3)}
.search svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--ink3)}
.unit{margin:0 0 28px}
.unit-head{display:flex;align-items:baseline;gap:12px;padding:0 0 10px;border-bottom:1px solid var(--line);margin-bottom:6px}
.unit-head .n{font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.06em}
.unit-head h2{font-size:18px}
.sim-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:10px}
.sim-row{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:14px 16px;border-radius:var(--r);background:var(--panel);border:1px solid var(--line);transition:border-color .15s,transform .15s}
.sim-row:hover{border-color:var(--line2);transform:translateY(-1px)}
.sim-row .idx{font-size:12px;font-weight:800;color:var(--ink3);width:22px;text-align:center}
.sim-row .t{font-weight:700;font-size:15px;letter-spacing:-.01em}
.sim-row .d{font-size:13px;color:var(--ink2);margin-top:2px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.sim-row.is-soon{opacity:.5;pointer-events:none}
.sim-row.is-soon .t::after{content:" · yakında";font-weight:600;color:var(--ink3)}
.type{font-size:11px;font-weight:800;letter-spacing:.08em;padding:4px 8px;border-radius:999px;background:var(--accent-soft);color:var(--accent);white-space:nowrap}
.sim-row .arrow{color:var(--ink3)}

/* simülasyon sayfası */
.sim-page{display:flex;flex-direction:column;gap:14px;padding-top:6px}
.sim-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:12px 24px;padding:8px 0 4px}
.sim-head h1{font-size:clamp(24px,3.4vw,34px)}
.sim-head .outcomes{display:flex;gap:6px;flex-wrap:wrap}
.sim-head .outcomes span{font-size:12px;font-weight:700;color:var(--ink2);background:var(--panel);border:1px solid var(--line);padding:3px 8px;border-radius:999px}
.sim-brief{display:grid;grid-template-columns:1fr 1fr;gap:10px;font-size:14px;color:var(--ink2)}
.sim-brief b{color:var(--ink);font-weight:700;display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:2px}
.sim-root{min-height:420px}
.sim-layout{display:grid;align-items:start;grid-template-columns:minmax(0,1fr) 340px;grid-template-areas:"stage controls" "aside aside";gap:14px}
.sim-layout--wide{grid-template-columns:minmax(0,1fr) 300px}
.sim-stage{grid-area:stage;background:var(--stage);border:1px solid var(--line);border-radius:var(--r-lg);padding:12px;display:flex;flex-direction:column;gap:10px;min-width:0}
.sim-controls{grid-area:controls;background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;display:flex;flex-direction:column;gap:14px;min-width:0}
.sim-aside{grid-area:aside;display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:14px}
.sim-aside:empty{display:none}
.sim-aside>*{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;min-width:0}
.sim-canvas-wrap{position:relative;width:100%;border-radius:var(--r);overflow:hidden;background:var(--panel);border:1px solid var(--line)}
.sim-canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.sim-title h2{font-size:17px} .sim-sub{font-size:13px;color:var(--ink2);margin-top:2px}
.sim-nav{display:flex;justify-content:space-between;gap:10px;margin-top:8px}
.sim-nav a{display:flex;align-items:center;gap:8px;padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:var(--panel);font-weight:600;font-size:14px;color:var(--ink2);max-width:48%}
.sim-nav a:hover{color:var(--ink)} .sim-nav a span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sim-loading{display:grid;place-items:center;min-height:300px;color:var(--ink2);font-weight:600}
.sim-error{padding:28px;border-radius:var(--r-lg);background:var(--panel);border:1px dashed var(--line2);color:var(--ink2);display:grid;gap:8px}
.readout--text .readout-value{font-size:15px;line-height:1.3}
@media (max-width:640px){ .crumbs{display:none} .brand span{font-size:15px} .topbar{padding:12px 0 10px} .hero{padding:32px 0 20px} }
@media (max-width:860px){ .sim-layout,.sim-layout--wide{grid-template-columns:1fr;grid-template-areas:"stage" "controls" "aside"} .sim-brief{grid-template-columns:1fr} }

/* kontroller */
.ctl{display:flex;flex-direction:column;gap:6px}
.ctl-label{font-size:13px;font-weight:700;color:var(--ink2)}
.ctl--slider{display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 10px}
.ctl--slider input{grid-column:1/-1}
.ctl-value{font-weight:700;font-variant-numeric:tabular-nums;font-size:14px;color:var(--ink)}
.ctl-ticks{grid-column:1/-1;display:flex;justify-content:space-between;font-size:11px;color:var(--ink3);font-weight:600;margin-top:-2px}
.is-disabled{opacity:.5}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:28px;background:transparent;margin:0;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:2px;background:var(--line2)}
input[type=range]::-moz-range-track{height:4px;border-radius:2px;background:var(--line2)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--accent);border:3px solid var(--panel);box-shadow:0 0 0 1px var(--line2);margin-top:-9px}
input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--accent);border:3px solid var(--panel);box-shadow:0 0 0 1px var(--line2)}
input[type=range]:disabled{cursor:not-allowed}
.seg{display:flex;gap:4px;padding:4px;border-radius:12px;background:var(--bg);border:1px solid var(--line)}
.seg--wrap{flex-wrap:wrap}
.seg button{flex:1;min-height:38px;padding:6px 10px;border:0;border-radius:9px;background:transparent;font-weight:700;font-size:14px;cursor:pointer;color:var(--ink2);display:flex;align-items:center;justify-content:center;gap:6px;white-space:nowrap}
.seg button[aria-pressed="true"]{background:var(--panel);color:var(--ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.seg button:disabled{opacity:.45;cursor:not-allowed}
.seg--small button{min-height:30px;font-size:12px;padding:4px 8px}
.seg--big button{min-height:52px;font-size:16px}
.seg-icon{display:inline-flex;font-size:18px;line-height:1}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.chip{min-height:36px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--panel);font-weight:700;font-size:13px;cursor:pointer;color:var(--ink2);display:inline-flex;align-items:center;gap:6px}
.chip[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.chip-icon{font-size:16px;line-height:1}
.switch{display:flex;align-items:center;gap:10px;background:transparent;border:0;padding:4px 0;cursor:pointer;font-weight:700;font-size:14px;color:var(--ink)}
.switch-track{width:40px;height:24px;border-radius:999px;background:var(--line2);position:relative;transition:background .2s;flex:0 0 auto}
.switch-track::after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 2px rgba(0,0,0,.2)}
.switch[aria-checked="true"] .switch-track{background:var(--accent)} .switch[aria-checked="true"] .switch-track::after{transform:translateX(16px)}
.switch:disabled{opacity:.5;cursor:not-allowed}
select{width:100%;min-height:40px;padding:8px 12px;border-radius:10px;border:1px solid var(--line);background:var(--panel);font:inherit;font-weight:600;color:var(--ink)}
.btn{min-height:40px;padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:var(--panel);font-weight:700;font-size:14px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;color:var(--ink);white-space:nowrap}
.btn:hover{border-color:var(--line2)}
.btn--primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn--small{min-height:32px;padding:4px 12px;font-size:13px}
.btn--block{width:100%}
.btn--icon{padding:8px 12px}
.btn--ghost{border-color:transparent;background:transparent;color:var(--ink2)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.transport{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.transport .seg{margin-left:auto}
.ctl-group{display:flex;flex-direction:column;gap:10px;padding-top:10px;border-top:1px solid var(--line)}
.ctl-group:first-child{border-top:0;padding-top:0}
.ctl-group-label{font-size:12px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--ink3)}
.readouts{display:flex;flex-wrap:wrap;gap:8px}
.readout{display:flex;flex-direction:column;gap:2px;padding:8px 12px;border-radius:12px;background:var(--panel);border:1px solid var(--line);min-width:90px;flex:1}
.readout-label{font-size:11px;font-weight:700;color:var(--ink2);letter-spacing:.04em}
.readout-row{display:flex;align-items:baseline;gap:4px}
.readout-value{font-size:20px;font-weight:800;letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.1}
.readout-unit{font-size:12px;font-weight:700;color:var(--ink2)}
.readout--big .readout-value{font-size:28px}
.readout[data-tone="ok"] .readout-value{color:var(--ok)} .readout[data-tone="no"] .readout-value{color:var(--no)} .readout[data-tone="warn"] .readout-value{color:var(--warn)} .readout[data-tone="accent"] .readout-value{color:var(--accent)}
.data-table-wrap{display:flex;flex-direction:column;gap:8px}
.data-table{width:100%;border-collapse:collapse;font-size:14px;font-variant-numeric:tabular-nums}
.data-table th{text-align:left;font-size:11px;font-weight:800;letter-spacing:.06em;text-transform:uppercase;color:var(--ink2);padding:6px 8px;border-bottom:1px solid var(--line)}
.data-table td{padding:7px 8px;border-bottom:1px solid var(--line);font-weight:600}
.data-empty{font-size:13px;color:var(--ink3);padding:8px 0}
.chart-box{display:flex;flex-direction:column;gap:8px}
.chart-wrap{position:relative;width:100%}
.chart{position:absolute;inset:0;width:100%;height:100%}
.note{font-size:14px;color:var(--ink2);padding:10px 12px;border-radius:12px;background:var(--bg);border:1px solid var(--line);line-height:1.45}
.note b{color:var(--ink)}
.note--ok{background:var(--ok-soft);border-color:transparent;color:var(--ink)}
.note--no{background:var(--no-soft);border-color:transparent;color:var(--ink)}
.note--warn{background:var(--warn-soft);border-color:transparent;color:var(--ink)}
.note--accent{background:var(--accent-soft);border-color:transparent;color:var(--ink)}
.steps ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.step{display:flex;align-items:flex-start;gap:10px;font-size:14px;font-weight:600;color:var(--ink2);line-height:1.35}
.step i{flex:0 0 auto;width:22px;height:22px;border-radius:50%;border:1.5px solid var(--line2);display:grid;place-items:center;font-style:normal;font-size:12px;font-weight:800;color:var(--ink2);transition:all .2s;margin-top:1px}
.step.done{color:var(--ink)} .step.done i{background:var(--ok);border-color:var(--ok);color:#fff}
.step b{color:var(--ink)}
.steps.all-done .ctl-group-label{color:var(--ok)}
.say{display:flex;align-items:center;gap:10px}
.say-text{font-size:17px;font-weight:700;line-height:1.35;letter-spacing:-.01em}
.early .say-text{font-size:19px}
.early .seg button{min-height:48px;font-size:15px}
.early .chip{min-height:44px;font-size:15px}
.early .btn{min-height:46px;font-size:15px}
.early input[type=range]::-webkit-slider-thumb{width:26px;height:26px;margin-top:-11px}
html.in-sim .app{display:none}
html.in-sim body{overflow:hidden;padding:0}
.sim-layout{display:grid;align-items:start}
@media (max-width:640px){ .crumbs{display:none} .brand span{font-size:15px} .topbar{padding:12px 0 10px} .hero{padding:32px 0 20px} }
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}