/* ABC İngilizce — site chrome. Notebook/flashcard-inspired, not a SaaS template. */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600;700&family=IBM+Plex+Sans:ital@1&display=swap');

:root{
  --paper:#EFF1EB;
  --paper-deep:#E6E9E0;
  --card:#FFFFFF;
  --ink:#17304A;
  --muted:#5B6B63;
  --line:#D9D6C9;
  --accent:#E2A63B;
  --accent-ink:#6B4310;
  --accent-soft:#FBEBCB;
  --brick:#B8453D;
  --brick-soft:#F5E1DE;
  --green5:#2F6B4F;   /* 5th grade band */
  --green5-soft:#DEEBE3;
  --blue6:#2A5C82;    /* 6th grade band */
  --blue6-soft:#DCE6EE;
  --plum7:#6C4A82;    /* 7th grade band */
  --plum7-soft:#E7DEEC;
  --rust8:#A5502B;    /* 8th grade band */
  --rust8-soft:#F1DFD2;
  --shadow:0 1px 2px rgba(23,48,74,.06), 0 8px 24px -12px rgba(23,48,74,.18);
  --radius:14px;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#14201C;
    --paper-deep:#0F1815;
    --card:#1B2925;
    --ink:#ECEFE9;
    --muted:#9FB0A8;
    --line:#2C3A34;
    --accent:#E9B658;
    --accent-ink:#2A1C05;
    --accent-soft:#3A2E14;
    --brick:#E1746B;
    --brick-soft:#3B2422;
    --green5:#7FBE9C; --green5-soft:#1E3229;
    --blue6:#8FB9D8; --blue6-soft:#1C2E3B;
    --plum7:#C1A6D6; --plum7-soft:#2E2436;
    --rust8:#E0A17D; --rust8-soft:#3A2A1E;
    --shadow:0 1px 2px rgba(0,0,0,.3), 0 8px 24px -12px rgba(0,0,0,.5);
  }
}

*{box-sizing:border-box}
html{scroll-padding-top:24px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:'IBM Plex Sans',system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3{font-family:'Fraunces',Georgia,serif;font-weight:600;line-height:1.15;margin:0 0 .4em;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,4.5vw,3.4rem);font-weight:600}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.2rem;font-weight:600}
p{margin:0 0 1em;max-width:62ch}
a{color:inherit}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 24px}

/* ---- top nav ---- */
.site-header{padding:22px 0;border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--accent);color:var(--accent-ink);
  display:flex;align-items:center;justify-content:center;font-family:'Fraunces',serif;font-weight:700;font-size:17px;flex:none}
.brand-name{font-family:'Fraunces',serif;font-weight:600;font-size:19px}
.nav-links{display:flex;gap:28px;list-style:none;margin:0;padding:0;font-size:15px}
.nav-links a{text-decoration:none;color:var(--muted);border-bottom:2px solid transparent;padding-bottom:2px}
.nav-links a:hover,.nav-links a.active{color:var(--ink);border-color:var(--accent)}
.nav-toggle{display:none}
@media (max-width:720px){
  .nav-links{position:fixed;inset:0 0 0 auto;width:min(78vw,320px);background:var(--card);flex-direction:column;
    padding:96px 28px 28px;gap:22px;font-size:17px;transform:translateX(100%);transition:transform .25s ease;
    box-shadow:var(--shadow);z-index:20}
  .nav-links.open{transform:translateX(0)}
  .nav-toggle{display:block;border:1px solid var(--line);background:var(--card);border-radius:9px;width:42px;height:42px;
    font-size:20px;cursor:pointer;color:var(--ink);position:relative;z-index:21}
}

/* ---- hero ---- */
.hero{padding:64px 0 56px;position:relative;overflow:hidden}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
@media (max-width:860px){.hero .container{grid-template-columns:1fr}}
.eyebrow-line{display:flex;align-items:center;gap:10px;margin-bottom:18px;color:var(--muted);font-size:14px}
.eyebrow-line::before{content:"";width:28px;height:2px;background:var(--accent)}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:46ch}
.hero-ctas{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}

.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 22px;border-radius:11px;text-decoration:none;
  font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;font-family:inherit}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{background:var(--accent);color:var(--accent-ink)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink)}

/* flashcard hero visual */
.card-stack{position:relative;height:280px}
.flashcard{position:absolute;width:230px;background:var(--card);border-radius:12px;box-shadow:var(--shadow);
  padding:22px 20px;border:1px solid var(--line)}
.flashcard .fc-en{font-family:'Fraunces',serif;font-size:26px;font-weight:600}
.flashcard .fc-tr{color:var(--muted);font-size:15px;margin-top:6px}
.flashcard .fc-tag{position:absolute;top:14px;right:14px;font-size:11px;background:var(--accent-soft);
  color:var(--accent-ink);padding:3px 8px;border-radius:99px;font-weight:600}
.fc-1{top:10px;left:30px;transform:rotate(-6deg);z-index:3}
.fc-2{top:60px;left:130px;transform:rotate(5deg);z-index:2;opacity:.9}
.fc-3{top:130px;left:10px;transform:rotate(3deg);z-index:1;opacity:.7}
@media (max-width:860px){.card-stack{height:230px;margin-top:8px}.fc-2{left:auto;right:10px}}

/* ---- sections ---- */
section{padding:56px 0}
.section-head{max-width:60ch;margin-bottom:36px}
.section-head p{color:var(--muted)}

/* feature grid — deliberately not identical rounded cards */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
@media (max-width:780px){.features{grid-template-columns:1fr}}
.feature{background:var(--card);padding:30px 26px}
.feature .fnum{font-family:'Fraunces',serif;font-size:14px;color:var(--accent-ink);background:var(--accent-soft);
  display:inline-block;padding:2px 9px;border-radius:99px;margin-bottom:14px}
.feature h3{margin-bottom:8px}
.feature p{color:var(--muted);font-size:15px;margin:0}

/* book-spine grade cards */
.book-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
@media (max-width:780px){.book-grid{grid-template-columns:1fr}}
.book{display:block;text-decoration:none;color:var(--ink);background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .15s ease}
.book:hover{transform:translateY(-2px)}
.book-spine{height:10px}
.book-body{padding:22px 24px}
.book-grade{font-size:13px;color:var(--muted);margin-bottom:6px}
.book-title{font-family:'Fraunces',serif;font-weight:600;font-size:1.25rem;margin-bottom:8px}
.book-desc{color:var(--muted);font-size:14.5px;margin-bottom:16px}
.book-stats{display:flex;gap:14px;font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px}
.book-stats b{color:var(--ink)}
.g5 .book-spine{background:var(--green5)} .g5 .book-grade{color:var(--green5)}
.g6 .book-spine{background:var(--blue6)} .g6 .book-grade{color:var(--blue6)}
.g7 .book-spine{background:var(--plum7)} .g7 .book-grade{color:var(--plum7)}
.g8 .book-spine{background:var(--rust8)} .g8 .book-grade{color:var(--rust8)}

.soon{opacity:.55;position:relative}
.soon-badge{position:absolute;top:16px;right:16px;font-size:12px;background:var(--brick-soft);color:var(--brick);
  padding:3px 10px;border-radius:99px;font-weight:600}

/* how it works */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;counter-reset:step}
@media (max-width:780px){.steps{grid-template-columns:1fr}}
.step{position:relative;padding-left:44px}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:30px;height:30px;
  border-radius:50%;background:var(--ink);color:var(--paper);display:flex;align-items:center;justify-content:center;
  font-family:'Fraunces',serif;font-size:14px;font-weight:600}
.step h3{margin-bottom:6px;font-size:1.05rem}
.step p{color:var(--muted);font-size:14.5px;margin:0}

/* cta band */
.cta-band{background:var(--ink);color:var(--paper);border-radius:20px;padding:48px 40px;display:flex;
  align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.cta-band h2{color:var(--paper);margin-bottom:6px}
.cta-band p{color:#C7D2CB;margin:0}
.cta-band .btn-primary{background:var(--accent);color:var(--accent-ink)}
.cta-band .btn-primary:hover{background:var(--paper);color:var(--ink)}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:40px 0;margin-top:20px}
.site-footer .container{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;font-size:14px;color:var(--muted)}
.foot-links{display:flex;gap:20px;list-style:none;margin:0;padding:0}
.foot-links a{text-decoration:none;color:var(--muted)}
.foot-links a:hover{color:var(--ink)}

/* breadcrumb */
.crumb{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--muted);text-decoration:none}
.crumb a:hover{color:var(--ink)}

/* about page */
.about-hero{padding:56px 0 20px}
.about-body{display:grid;grid-template-columns:2fr 1fr;gap:48px}
@media (max-width:820px){.about-body{grid-template-columns:1fr}}
.pull{border-left:3px solid var(--accent);padding-left:18px;margin:26px 0;font-family:'Fraunces',serif;
  font-size:1.15rem;font-style:italic;color:var(--ink)}
.info-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.info-card h3{font-size:1rem;margin-bottom:12px}
.info-card ul{margin:0;padding:0;list-style:none;font-size:14.5px}
.info-card li{padding:9px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px}
.info-card li:first-child{border-top:none}
.info-card li span:first-child{color:var(--muted)}

/* 404 */
.notfound{padding:100px 0;text-align:center}
.notfound .big{font-family:'Fraunces',serif;font-size:clamp(4rem,14vw,7rem);font-weight:600;color:var(--accent);line-height:1}

/* focus */
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}