@font-face{font-family:'Fira Mono';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/FiraMono-400-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Fira Mono';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/FiraMono-400-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Fira Mono';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/FiraMono-500-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Fira Mono';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/FiraMono-500-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/FiraSans-400-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/FiraSans-400-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/FiraSans-500-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/FiraSans-500-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/FiraSans-600-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/FiraSans-600-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/FiraSans-700-latin-ext.woff2) format('woff2');unicode-range:U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;}
@font-face{font-family:'Fira Sans';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/FiraSans-700-latin.woff2) format('woff2');unicode-range:U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;}
/* Chailea Laboratories — "laboratuvar defteri" (lab notebook). Fonts: Fira Sans + Fira Mono (self-hosted, OFL).
   Colours sampled from the packaging: ink navy #163246, amber #eca219; baby line sky #b4e3f2, yellow #f9da5d. */
:root {
  --paper: #f3f5f7;
  --paper-2: #e9edf0;
  --surface: #ffffff;
  --ink: #142637;
  --ink-2: #4b5b69;
  --ink-3: #7b8894;
  --rule: #d3dae0;
  --rule-2: #e4e9ed;
  --navy: #163246;
  --navy-2: #0e2233;
  --amber: #eca219;
  --amber-ink: #8a5a00;
  --amber-wash: #fbf0d3;
  --sky: #b4e3f2;
  --sky-wash: #e6f4fa;
  --yellow: #f9da5d;
  --sans: "Fira Sans", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: "Fira Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --wrap: 1120px;
  --gutter: 16px;
  --grid: repeating-linear-gradient(0deg, transparent 0 31px, var(--rule-2) 31px 32px);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f171e; --paper-2: #141e27; --surface: #172330; --ink: #e8eef2; --ink-2: #aab8c3; --ink-3: #7f8d99;
    --rule: #2a3946; --rule-2: #1f2c37; --navy: #d3e5f1; --navy-2: #eaf4fb; --amber-ink: #f0bf5a; --amber-wash: #3a2e10; --sky-wash: #143040;
  }
  :root:not([data-theme="light"]) .brand img, :root:not([data-theme="light"]) .baby-mark { filter: brightness(0) invert(1); }
}
:root[data-theme="dark"] {
  --paper: #0f171e; --paper-2: #141e27; --surface: #172330; --ink: #e8eef2; --ink-2: #aab8c3; --ink-3: #7f8d99;
  --rule: #2a3946; --rule-2: #1f2c37; --navy: #d3e5f1; --navy-2: #eaf4fb; --amber-ink: #f0bf5a; --amber-wash: #3a2e10; --sky-wash: #143040;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); font-size: 17px; line-height: 1.6; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--navy-2); }
:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--sans); line-height: 1.15; letter-spacing: -0.015em; color: var(--ink); margin: 0 0 0.45em; font-weight: 600; }
h1 { font-size: clamp(2rem, 4.8vw, 3.1rem); font-weight: 700; }
h2 { font-size: clamp(1.3rem, 2.4vw, 1.6rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.lede { font-size: 1.12rem; color: var(--ink-2); max-width: 58ch; }
.muted { color: var(--ink-2); font-size: 0.95rem; }
.mono, .fact dt, .num, .tag, .rec, .nav, .foot-h, .notes th, .crumbs, .stamp { font-family: var(--mono); }
.mono { font-size: 0.92em; }
.mark { background: linear-gradient(transparent 55%, var(--amber-wash) 55%); padding: 0 2px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--navy); color: #fff; padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* header */
.site-head { background: var(--surface); border-bottom: 1px solid var(--rule); position: sticky; top: 0; z-index: 5; }
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; padding-top: 10px; padding-bottom: 10px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: auto; height: 40px; }
.brand-sub { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); border-left: 1px solid var(--rule); padding-left: 12px; line-height: 1.3; }
.nav { display: flex; align-items: center; gap: 4px 20px; flex-wrap: wrap; font-size: 0.86rem; letter-spacing: 0.04em; text-transform: uppercase; }
.nav a { text-decoration: none; padding: 6px 0; min-height: 24px; color: var(--ink-2); }
.nav a:hover { color: var(--navy); }
.nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--amber); }
.btn { display: inline-block; padding: 11px 18px; border: 1.5px solid var(--navy); color: var(--navy); text-decoration: none; font-weight: 600; min-height: 44px; line-height: 1.2; background: transparent; font-family: var(--sans); }
.btn:hover { background: var(--paper-2); }
.btn-primary { background: var(--navy); color: #fff; border-color: var(--navy); }
.btn-primary:hover { background: var(--navy-2); color: #fff; }
.btn-small { padding: 7px 14px; min-height: 36px; font-size: 0.88rem; text-transform: none; letter-spacing: 0; }
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin: 1em 0; }

/* notebook furniture */
.rec { font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); display: flex; flex-wrap: wrap; gap: 6px 14px; margin-bottom: 14px; }
.rec b { color: var(--amber-ink); font-weight: 500; }
.num { display: inline-block; min-width: 2.2em; color: var(--amber-ink); font-size: 0.8em; font-weight: 500; letter-spacing: 0.08em; }
.sec { padding: 40px 0; }
.sec-h { display: flex; align-items: baseline; gap: 14px; border-bottom: 1px solid var(--rule); padding-bottom: 10px; margin-bottom: 18px; }
.sec-h h2 { margin: 0; }
.stamp { display: inline-block; border: 1.5px solid var(--amber-ink); color: var(--amber-ink); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; padding: 4px 8px; transform: rotate(-2deg); }
.ruled { background-image: var(--grid); background-attachment: local; }

/* hero */
.hero { background: var(--surface); border-bottom: 1px solid var(--rule); background-image: var(--grid); }
.hero-grid { display: grid; grid-template-columns: 1.25fr 1fr; gap: 40px; align-items: center; padding-top: 56px; padding-bottom: 56px; }
.hero h1 { max-width: 14ch; }
.record-card { background: var(--surface); border: 1px solid var(--rule); box-shadow: 0 1px 0 var(--rule), 8px 8px 0 var(--paper-2); padding: 18px; }
.record-card .rec { margin-bottom: 10px; }
.record-row { display: grid; grid-template-columns: 72px 1fr; gap: 14px; align-items: center; padding: 12px 0; border-top: 1px solid var(--rule-2); text-decoration: none; color: var(--ink); }
.record-row:first-of-type { border-top: 0; }
.record-row img { width: 72px; height: 90px; object-fit: cover; background: #fff; border: 1px solid var(--rule-2); }
.record-row strong { display: block; font-weight: 600; }
.record-row span { display: block; font-family: var(--mono); font-size: 0.78rem; color: var(--ink-3); letter-spacing: 0.04em; }
.record-row:hover strong { color: var(--navy); text-decoration: underline; }

/* principles */
.principles { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 0; border: 1px solid var(--rule); background: var(--surface); }
.principle { padding: 22px 20px; border-left: 1px solid var(--rule); }
.principle:first-child { border-left: 0; }
.principle .num { display: block; margin-bottom: 8px; }
.principle h3 { margin-bottom: 0.3em; }
.principle p { margin: 0; color: var(--ink-2); font-size: 0.98rem; }

/* specimen cards */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.card { background: var(--surface); border: 1px solid var(--rule); display: flex; flex-direction: column; }
.card-img { display: block; background: #fff; border-bottom: 1px solid var(--rule); }
.card-img img { aspect-ratio: 4 / 5; object-fit: contain; width: 100%; }
.card-body { padding: 16px 18px 20px; }
.card-body .rec { margin-bottom: 8px; }
.card h3 a { text-decoration: none; }
.card.accent-amber .card-body { border-top: 3px solid var(--amber); }
.card.accent-sky .card-body { border-top: 3px solid var(--sky); }

/* dark band */
.band { background: var(--navy); color: #e8f0f6; }
.band-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 36px; padding: 44px 16px; align-items: center; }
.band h2 { color: #fff; }
.band p { color: #cfdce6; margin: 0 0 0.8em; }
.band .btn { border-color: #fff; color: #fff; }
.band .btn:hover { background: rgba(255,255,255,0.12); }
.band table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.band td, .band th { padding: 8px 0; border-top: 1px solid rgba(255,255,255,0.18); vertical-align: top; text-align: left; }
.band th { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--yellow); width: 36%; padding-right: 10px; font-weight: 500; }
.record-card .stamp, .p-intro .stamp { margin-top: 10px; }

/* product page */
.crumbs { font-size: 0.8rem; color: var(--ink-3); padding-top: 14px; letter-spacing: 0.04em; }
.p-hero { display: grid; grid-template-columns: 1.05fr 1fr; gap: 36px; padding: 20px 16px 36px; align-items: start; }
.gallery { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.gallery .g-item { margin: 0; background: #fff; border: 1px solid var(--rule); }
.gallery .g-item:first-child { grid-column: 1 / -1; }
.gallery img { width: 100%; aspect-ratio: 2 / 3; object-fit: cover; }
.gallery .g-item:first-child img { aspect-ratio: 1 / 1; object-fit: contain; }
.p-intro h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.vol { font-family: var(--mono); font-size: 0.5em; font-weight: 400; color: var(--ink-3); white-space: nowrap; letter-spacing: 0.08em; vertical-align: middle; }
.func { font-size: 1.05rem; color: var(--ink-2); margin-top: -0.2em; }
.facts { display: grid; grid-template-columns: 1fr; gap: 0; margin: 1.2em 0 0; padding: 0; background: var(--surface); border: 1px solid var(--rule); }
.fact { margin: 0; display: grid; grid-template-columns: 38% 1fr; gap: 12px; padding: 9px 14px; border-top: 1px solid var(--rule-2); }
.fact:first-child { border-top: 0; }
.fact dt { font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); padding-top: 3px; }
.fact dd { margin: 0; }
.accent-amber .facts { border-top: 3px solid var(--amber); }
.accent-sky .facts { border-top: 3px solid var(--sky); }
.baby-mark { height: 30px; width: auto; margin-bottom: 10px; }
.p-body { max-width: 820px; }
.p-body .sec { padding: 26px 0; }
.steps { padding-left: 1.3em; } .steps li { margin-bottom: 0.4em; }
.warn { border: 1px solid var(--rule); border-left: 4px solid var(--amber); background: var(--surface); padding: 18px 20px; margin-top: 8px; }
.warn .mandatory { font-size: 1.06rem; margin-bottom: 0.6em; }
.warn ul { margin: 0; padding-left: 1.2em; }
.accent-sky .warn { border-left-color: var(--sky); }
.inci { line-height: 1.75; font-size: 0.95rem; background: var(--surface); border: 1px solid var(--rule); padding: 14px 16px; }
.notes { width: 100%; border-collapse: collapse; font-size: 0.95rem; margin-top: 1em; background: var(--surface); border: 1px solid var(--rule); }
.notes caption { text-align: left; color: var(--ink-3); font-size: 0.82rem; padding: 0 0 8px; font-family: var(--mono); letter-spacing: 0.04em; }
.notes th, .notes td { text-align: left; vertical-align: top; padding: 9px 12px; border-top: 1px solid var(--rule-2); }
.notes thead th { border-top: 0; font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); background: var(--paper-2); }
.notes th[scope="row"] { font-weight: 500; width: 38%; font-size: 0.88rem; }
.channels li { margin-bottom: 0.5em; }
.page { padding: 10px 16px 40px; max-width: 820px; }
.page .sec { padding: 22px 0; }

/* footer */
.site-foot { background: var(--surface); border-top: 1px solid var(--rule); margin-top: 40px; font-size: 0.94rem; color: var(--ink-2); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 28px; padding-top: 36px; padding-bottom: 12px; }
.foot-brand { font-weight: 600; color: var(--ink); margin-bottom: 0.4em; }
.foot-h { font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 0.6em; }
.foot-note { border-top: 1px solid var(--rule); padding-top: 14px; padding-bottom: 24px; font-size: 0.86rem; font-family: var(--mono); color: var(--ink-3); }
.foot-note p { margin: 0; }

@media (max-width: 880px) {
  .hero-grid, .p-hero, .band-grid, .foot-grid { grid-template-columns: 1fr; }
  .hero-grid { padding-top: 32px; padding-bottom: 36px; gap: 28px; }
  .principles { grid-template-columns: 1fr 1fr; }
  .principle:nth-child(odd) { border-left: 0; }
  .principle:nth-child(n+3) { border-top: 1px solid var(--rule); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .principles { grid-template-columns: 1fr; }
  .principle { border-left: 0; border-top: 1px solid var(--rule); }
  .principle:first-child { border-top: 0; }
  .fact { grid-template-columns: 1fr; gap: 2px; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .notes th[scope="row"] { width: 44%; }
  .brand img { height: 34px; }
  .brand-sub { display: none; }
  .record-card { box-shadow: 0 1px 0 var(--rule), 5px 5px 0 var(--paper-2); }
}