/* ============================================================
   Excel Eğitimi — Stil
   Display: Fraunces · Body: Inter · kbd: ui-monospace
   Primary: Excel green · Comparison: Google E-Tablolar (blue)
   ============================================================ */

:root{
  --ink:#221733;          /* deep green-ink text */
  --ink-soft:#4A465B;
  --ink-faint:#817E94;
  --xl:#8B3DFF;           /* Microsoft Excel green — primary */
  --xl-deep:#6320C9;
  --xl-soft:#F0E6FF;      /* green tint */
  --cmp:#D83B01;          /* Google E-Tablolar comparison — blue */
  --cmp-soft:#FBE9E1;
  --cmp-line:#F5C6B3;
  --cmp-deep:#A52D08;
  --amber:#B26A00;        /* tips */
  --amber-soft:#FCF3E6;
  --amber-line:#F0DDBC;
  --paper:#FDFCFF;        /* page background (cool near-white) */
  --surface:#FFFFFF;
  --line:#E9E2F2;
  --line-soft:#F1EBF8;
  --radius:14px;
  --radius-sm:9px;
  --maxread:46rem;
  --sidebar:300px;
  --shadow-sm:0 1px 2px rgba(19,38,28,.05), 0 2px 8px rgba(19,38,28,.05);
  --shadow-md:0 6px 24px rgba(19,38,28,.10);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

body{margin:0;background:var(--paper);color:var(--ink);
  font-family:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}

h1,h2,h3,h4{font-family:"Fraunces","Iowan Old Style",Georgia,serif;line-height:1.18;color:var(--ink);font-weight:600}
a{color:var(--xl);text-decoration:none}
a:hover{text-decoration:underline}

.app{display:grid;grid-template-columns:var(--sidebar) 1fr;min-height:100vh}

.topbar{display:none;position:sticky;top:0;z-index:40;align-items:center;gap:.7rem;padding:.6rem .9rem;
  background:rgba(251,253,251,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.topbar .brand-mark{width:30px;height:30px}
.topbar .topbar-title{font-family:"Fraunces",serif;font-weight:600;font-size:1.05rem}
.menu-btn{display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;
  border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--ink);cursor:pointer;}
.menu-btn svg{width:20px;height:20px}

.sidebar{position:sticky;top:0;align-self:start;height:100vh;overflow-y:auto;background:var(--surface);
  border-right:1px solid var(--line);padding:1.6rem 1.1rem 2rem;}
.sidebar-brand{display:flex;align-items:center;gap:.65rem;margin-bottom:.4rem;padding:0 .4rem}
.sidebar-brand .brand-mark{width:38px;height:38px;flex:none}
.sidebar-brand .b-title{font-family:"Fraunces",serif;font-weight:600;font-size:1.15rem;line-height:1.15}
.sidebar-brand .b-sub{font-size:.72rem;color:var(--ink-faint);letter-spacing:.04em;text-transform:uppercase}
.version-badge{margin:.9rem .4rem 1.3rem;padding:.5rem .7rem;background:var(--xl-soft);border-radius:10px;
  font-size:.78rem;color:var(--xl-deep);line-height:1.4;}
.version-badge b{font-weight:600}
.toc-label{font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint);padding:0 .4rem;margin-bottom:.5rem}
.toc{list-style:none;margin:0;padding:0}
.toc a{display:flex;gap:.6rem;align-items:baseline;padding:.46rem .55rem;border-radius:8px;
  color:var(--ink-soft);font-size:.92rem;line-height:1.3;text-decoration:none;}
.toc a:hover{background:var(--line-soft);color:var(--ink)}
.toc a.active{background:var(--xl-soft);color:var(--xl-deep);font-weight:500}
.toc .num{font-variant-numeric:tabular-nums;color:var(--xl);font-size:.78rem;font-weight:600;min-width:1.4em}
.toc .appendix{margin-top:.4rem;border-top:1px solid var(--line-soft);padding-top:.5rem}
.toc-level{font-family:"Inter",sans-serif;font-size:.66rem;letter-spacing:.13em;text-transform:uppercase;
  color:#A99BC0;padding:.85rem .55rem .2rem;margin-top:.4rem;border-top:1px solid var(--line-soft);}
.toc-level.first{border-top:none;margin-top:0;}

.scrim{position:fixed;inset:0;background:rgba(19,38,28,.42);z-index:30;opacity:0;pointer-events:none;transition:opacity .25s}
.scrim.show{opacity:1;pointer-events:auto}

.main{min-width:0;overflow-wrap:break-word}
.wrap{max-width:var(--maxread);margin:0 auto;padding:0 1.3rem}

.hero{background:radial-gradient(120% 130% at 100% 0%, rgba(139,61,255,.10), transparent 55%),linear-gradient(180deg,#fff,var(--paper));
  border-bottom:1px solid var(--line);padding:4.2rem 0 3rem;}
.hero .eyebrow{color:var(--xl);font-weight:600;letter-spacing:.14em;text-transform:uppercase;font-size:.78rem;margin:0 0 1rem}
.hero h1{font-size:clamp(2.3rem,6vw,3.7rem);margin:0 0 1rem;letter-spacing:-.01em}
.hero p.lede{font-size:1.18rem;color:var(--ink-soft);margin:0 0 1.6rem;max-width:34rem}
.hero-meta{display:flex;flex-wrap:wrap;gap:.6rem}
.chip{display:inline-flex;align-items:center;gap:.4rem;padding:.4rem .8rem;border-radius:999px;font-size:.85rem;
  background:var(--surface);border:1px solid var(--line);color:var(--ink-soft);}
.chip.xl{background:var(--xl-soft);border-color:transparent;color:var(--xl-deep)}
.chip.cmp{background:var(--cmp-soft);border-color:transparent;color:var(--cmp-deep)}

.level-divider{padding:2.8rem 0 1rem;border-bottom:1px solid var(--line-soft);scroll-margin-top:1rem;}
.level-divider .lv-kicker{display:inline-block;color:#fff;background:var(--xl);font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;font-size:.72rem;padding:.3rem .7rem;border-radius:999px;}
.level-divider h2{font-size:clamp(1.9rem,4.6vw,2.7rem);margin:.7rem 0 .5rem;letter-spacing:-.01em;}
.level-divider p{color:var(--ink-soft);max-width:40rem;font-size:1.06rem;margin:0;}

.chapter{padding:3.2rem 0;border-bottom:1px solid var(--line-soft);scroll-margin-top:1rem}
.chapter .eyebrow{display:inline-flex;align-items:center;gap:.55rem;color:var(--xl);font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;font-size:.74rem;margin:0 0 .7rem;}
.chapter .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--xl)}
.chapter h2{font-size:clamp(1.7rem,4vw,2.3rem);margin:0 0 1rem;letter-spacing:-.01em}
.chapter h3{font-size:1.22rem;margin:2rem 0 .7rem;color:var(--xl-deep)}
.chapter p{margin:0 0 1rem;color:var(--ink)}
.chapter .intro{font-size:1.08rem;color:var(--ink-soft)}

ol,ul{margin:0 0 1.2rem;padding-left:0}
.steps{list-style:none;counter-reset:step;padding:0}
.steps>li{counter-increment:step;position:relative;padding:.15rem 0 .9rem 2.6rem;margin:0;}
.steps>li::before{content:counter(step);position:absolute;left:0;top:0;width:1.8rem;height:1.8rem;border-radius:50%;
  background:var(--xl);color:#fff;font-size:.85rem;font-weight:600;font-family:"Inter",sans-serif;
  display:flex;align-items:center;justify-content:center;}
.bullets{list-style:none;padding:0}
.bullets>li{position:relative;padding:.1rem 0 .55rem 1.4rem}
.bullets>li::before{content:"";position:absolute;left:.2rem;top:.78rem;width:7px;height:7px;border-radius:50%;background:var(--xl)}

kbd{font-family:ui-monospace,"SF Mono","Cascadia Code",Consolas,monospace;font-size:.82em;background:#fff;
  border:1px solid #cdd9d0;border-bottom-width:2px;border-radius:6px;padding:.12em .5em;color:var(--ink);white-space:nowrap;box-shadow:0 1px 0 rgba(19,38,28,.04)}
code{font-family:ui-monospace,Consolas,monospace;font-size:.88em;background:#F0F5F1;border:1px solid #DCE7E0;border-radius:5px;padding:.06em .4em;color:var(--xl-deep);overflow-wrap:anywhere}

.img-slot{margin:1.4rem 0;border:2px dashed #C9B6E0;border-radius:var(--radius);
  background:repeating-linear-gradient(45deg,#fff,#fff 14px,#F8F4FF 14px,#F8F4FF 28px);
  padding:1.6rem 1.2rem;text-align:center;color:var(--ink-faint);}
.img-slot .slot-icon{width:34px;height:34px;margin:0 auto .55rem;display:block;color:#9D93B5}
.img-slot .slot-tag{display:inline-block;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;font-weight:600;
  color:var(--xl);background:var(--xl-soft);padding:.2rem .6rem;border-radius:999px;margin-bottom:.5rem}
.img-slot .slot-cap{font-size:.92rem;color:var(--ink-soft);margin:0;line-height:1.5}
.img-slot .slot-hint{font-size:.78rem;color:var(--ink-faint);margin:.35rem 0 0}

.tip{margin:1.4rem 0;padding:1rem 1.15rem 1rem 1.1rem;background:var(--amber-soft);border:1px solid var(--amber-line);
  border-left:4px solid var(--amber);border-radius:var(--radius-sm);}
.tip .tip-head{display:flex;align-items:center;gap:.5rem;font-weight:600;color:var(--amber);font-size:.82rem;
  letter-spacing:.04em;text-transform:uppercase;margin-bottom:.35rem}
.tip .tip-head svg{width:16px;height:16px}
.tip p{margin:0;font-size:.97rem;color:#5A4318}
.tip p+p{margin-top:.5rem}

/* comparison card (Google E-Tablolar) — blue, to contrast Excel green */
.docs-compare{margin:1.8rem 0 .5rem;border:1px solid var(--cmp-line);background:var(--cmp-soft);border-radius:var(--radius);overflow:hidden;}
.docs-compare .dc-head{display:flex;align-items:center;gap:.6rem;padding:.85rem 1.15rem;background:rgba(216,59,1,.08);border-bottom:1px solid var(--cmp-line);}
.docs-compare .dc-head .g-mark{width:24px;height:24px;flex:none}
.docs-compare .dc-head h4{margin:0;font-family:"Inter",sans-serif;font-weight:600;font-size:.98rem;color:var(--cmp-deep)}
.docs-compare .dc-head .dc-label{margin-left:auto;font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--cmp);font-weight:600}
.docs-compare .dc-body{padding:1rem 1.15rem 1.1rem}
.docs-compare .dc-body p{margin:0 0 .7rem;color:#5A1A06;font-size:.97rem}
.docs-compare .dc-body p:last-child{margin-bottom:0}
.docs-compare .dc-body .bullets>li::before,.docs-compare .dc-body .steps>li::before{background:var(--cmp)}
.docs-compare kbd{border-color:#e3c3b4}
.docs-compare code{background:#FBE9E1;border-color:#F5C6B3;color:var(--cmp-deep)}

.exercise{margin:2rem 0 .5rem;border:1px solid #D8CCEA;border-radius:var(--radius);background:var(--surface);overflow:hidden;box-shadow:var(--shadow-sm);}
.exercise .ex-head{display:flex;align-items:center;gap:.6rem;padding:.8rem 1.15rem;background:var(--xl-deep);color:#fff;}
.exercise .ex-head svg{width:18px;height:18px;flex:none}
.exercise .ex-head h4{margin:0;color:#fff;font-family:"Inter",sans-serif;font-weight:600;font-size:.98rem;letter-spacing:.01em}
.exercise .ex-head .ex-time{margin-left:auto;font-size:.74rem;background:rgba(255,255,255,.16);padding:.2rem .6rem;border-radius:999px}
.exercise .ex-body{padding:1rem 1.2rem 1.15rem}
.exercise .ex-body>p:first-child{margin-top:0}
.exercise .ex-body .steps>li::before{background:var(--xl-deep)}

.shortcut-grid{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin:1.2rem 0}
.shortcut-grid .sc{display:flex;justify-content:space-between;align-items:center;gap:.8rem;padding:.7rem .9rem;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;}
.shortcut-grid .sc span{font-size:.92rem;color:var(--ink-soft)}

.site-footer{padding:2.6rem 0 3.4rem;color:var(--ink-faint);font-size:.9rem}
.site-footer .wrap{border-top:1px solid var(--line);padding-top:1.6rem}

.totop{position:fixed;right:1rem;bottom:1rem;z-index:20;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--line);background:var(--surface);color:var(--xl);cursor:pointer;box-shadow:var(--shadow-md);
  display:none;align-items:center;justify-content:center;}
.totop svg{width:20px;height:20px}
.totop.show{display:flex}

@media (max-width:900px){
  html,body{overflow-x:hidden;max-width:100%}
  .app{grid-template-columns:1fr}
  .topbar{display:flex}
  .sidebar{position:fixed;top:0;left:0;z-index:35;width:84vw;max-width:330px;height:100vh;
    transform:translateX(-103%);transition:transform .28s ease;box-shadow:var(--shadow-md);}
  .sidebar.open{transform:translateX(0)}
  .hero{padding:2.6rem 0 2rem}
  .shortcut-grid{grid-template-columns:1fr}
  body{font-size:16px}
}
@media (prefers-reduced-motion:reduce){.sidebar{transition:none}.scrim{transition:none}}

@media print{
  .sidebar,.topbar,.totop,.scrim{display:none!important}
  .app{display:block}
  .chapter{border:none}
  .hero{background:none}
  body{font-size:11pt;color:#000}
  a{color:#000;text-decoration:none}
  .img-slot{background:none}
}