/* DaveLog — Notes from building a better system */
:root{
  --plum:#4A2C5A;
  --cream:#F5EFE7;
  --coral:#E85D5D;
  --sage:#7D9D8C;
  --charcoal:#2D2A2E;
  --plum-soft:rgba(74,44,90,.08);
  --plum-line:rgba(74,44,90,.14);
  --cream-deep:#EDE4D6;
  --charcoal-soft:#4a4650;
  --maxw:1180px;
  --read:720px;
  --serif:'Spectral',Georgia,serif;
  --sans:'Karla',system-ui,sans-serif;
  --rad:14px;
  --shadow:0 1px 3px rgba(45,42,46,.06),0 8px 30px rgba(45,42,46,.07);
  --shadow-lg:0 4px 14px rgba(45,42,46,.08),0 24px 60px rgba(45,42,46,.10);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  background:var(--cream);
  color:var(--charcoal);
  line-height:1.7;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--plum);text-decoration:none;transition:color .2s}
a:hover{color:var(--coral)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.22;color:var(--plum);letter-spacing:-.01em}
h1{font-size:clamp(2rem,5vw,3.2rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:1.3rem}
p{margin-bottom:1.1em}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.read{max-width:var(--read);margin:0 auto;padding:0 24px}

/* ===== Header / Nav ===== */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(245,239,231,.92);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--plum-line);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;max-width:var(--maxw);margin:0 auto;gap:24px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--serif);font-weight:700;font-size:1.4rem;color:var(--plum)}
.brand img{width:38px;height:38px;border-radius:8px}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text small{font-family:var(--sans);font-weight:400;font-size:.72rem;color:var(--charcoal-soft);letter-spacing:.02em}
.nav-links{display:flex;gap:6px;list-style:none;align-items:center;flex-wrap:wrap}
.nav-links a{
  display:block;padding:8px 12px;border-radius:8px;
  font-size:.92rem;font-weight:500;color:var(--charcoal);
}
.nav-links a:hover{background:var(--plum-soft);color:var(--plum)}
.nav-toggle{display:none;background:none;border:1px solid var(--plum-line);border-radius:8px;padding:8px 12px;cursor:pointer;color:var(--plum)}
@media(max-width:900px){
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    flex-direction:column;background:var(--cream);
    border-bottom:1px solid var(--plum-line);padding:12px;gap:2px;
  }
  .nav-links.open{display:flex}
  .nav-links a{width:100%}
}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 22px;border-radius:10px;font-weight:600;font-size:.95rem;
  font-family:var(--sans);transition:transform .15s,background .2s,box-shadow .2s;
  cursor:pointer;border:none;
}
.btn-primary{background:var(--plum);color:var(--cream)!important}
.btn-primary:hover{background:#3d2350;transform:translateY(-1px);box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--plum)!important;border:1px solid var(--plum-line)}
.btn-ghost:hover{background:var(--plum-soft)}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:64px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--coral);margin-bottom:18px}
.hero-eyebrow::before{content:"";width:28px;height:2px;background:var(--coral)}
.hero h1{margin-bottom:18px}
.hero .lede{font-size:1.15rem;color:var(--charcoal-soft);margin-bottom:28px;max-width:32ch}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-img{border-radius:18px;overflow:hidden;box-shadow:var(--shadow-lg);aspect-ratio:16/9}
.hero-img img{width:100%;height:100%;object-fit:cover}
@media(max-width:820px){.hero-grid{grid-template-columns:1fr;gap:32px}.hero-img{order:-1}}

/* ===== Section ===== */
section{padding:56px 0}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:36px;gap:20px;flex-wrap:wrap}
.section-head h2{margin-bottom:4px}
.section-head .sub{color:var(--charcoal-soft);font-size:.95rem}
.section-head a.more{font-weight:600;font-size:.9rem;color:var(--coral)}

/* ===== Cards ===== */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media(max-width:900px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.card-grid{grid-template-columns:1fr}}
.card{
  background:#fff;border:1px solid var(--plum-line);border-radius:var(--rad);
  overflow:hidden;display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card-img{aspect-ratio:3/2;overflow:hidden;background:var(--cream-deep)}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:22px 22px 26px;display:flex;flex-direction:column;flex:1}
.cat-tag{display:inline-block;font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--coral);margin-bottom:10px}
.card h3{margin-bottom:8px;font-size:1.18rem}
.card h3 a{color:var(--plum)}
.card h3 a:hover{color:var(--coral)}
.card p{color:var(--charcoal-soft);font-size:.94rem;margin-bottom:16px;flex:1}
.card-meta{font-size:.8rem;color:var(--charcoal-soft);display:flex;gap:14px;align-items:center}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--charcoal-soft);opacity:.5}

/* ===== Featured experiment (big card) ===== */
.featured{
  display:grid;grid-template-columns:1.1fr 1fr;gap:0;
  background:#fff;border:1px solid var(--plum-line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);
}
.featured-img{aspect-ratio:16/10;overflow:hidden;background:var(--cream-deep)}
.featured-img img{width:100%;height:100%;object-fit:cover}
.featured-body{padding:40px 40px;display:flex;flex-direction:column;justify-content:center}
.featured-body .cat-tag{margin-bottom:14px}
.featured-body h2{margin-bottom:14px;font-size:clamp(1.6rem,3vw,2.2rem)}
.featured-body p{color:var(--charcoal-soft);margin-bottom:24px;font-size:1.02rem}
@media(max-width:820px){.featured{grid-template-columns:1fr}.featured-body{padding:28px}}

/* ===== Habit tracker viz ===== */
.habit-section{background:var(--plum);color:var(--cream)}
.habit-section h2{color:var(--cream)}
.habit-section .sub{color:rgba(245,239,231,.7)}
.habit-viz{
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:18px;padding:32px;margin-top:8px;
}
.habit-row{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.habit-row:last-child{margin-bottom:0}
.habit-label{flex:0 0 180px;font-weight:600;font-size:.95rem;color:var(--cream)}
.habit-cells{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.habit-cell{width:22px;height:22px;border-radius:5px;background:rgba(255,255,255,.08);transition:transform .15s}
.habit-cell.done-coral{background:var(--coral)}
.habit-cell.done-sage{background:var(--sage)}
.habit-cell.done-plum{background:#9b6fb5}
.habit-row .pct{flex:0 0 44px;text-align:right;font-size:.85rem;color:rgba(245,239,231,.8);font-variant-numeric:tabular-nums}
.habit-legend{display:flex;gap:20px;margin-top:24px;flex-wrap:wrap;font-size:.82rem;color:rgba(245,239,231,.75)}
.habit-legend span{display:flex;align-items:center;gap:8px}
.habit-legend i{width:12px;height:12px;border-radius:3px;display:inline-block}
@media(max-width:640px){.habit-label{flex:0 0 110px;font-size:.82rem}.habit-cell{width:16px;height:16px}}

/* ===== Reflection prompts ===== */
.prompts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
@media(max-width:820px){.prompts{grid-template-columns:1fr}}
.prompt{
  background:#fff;border:1px solid var(--plum-line);border-left:4px solid var(--sage);
  border-radius:12px;padding:24px;
}
.prompt p{font-family:var(--serif);font-size:1.08rem;color:var(--plum);font-style:italic;margin:0}
.prompt .num{font-family:var(--sans);font-size:.72rem;font-weight:700;color:var(--sage);letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:8px;font-style:normal}

/* ===== Newsletter ===== */
.newsletter{text-align:center;background:var(--cream-deep);border-radius:18px;padding:48px 32px}
.newsletter h2{margin-bottom:10px}
.newsletter p{color:var(--charcoal-soft);max-width:46ch;margin:0 auto 24px}
.newsletter form{display:flex;gap:10px;max-width:440px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.newsletter input{flex:1;min-width:200px;padding:12px 16px;border:1px solid var(--plum-line);border-radius:10px;font-family:var(--sans);font-size:.95rem;background:#fff;color:var(--charcoal)}
.newsletter input:focus{outline:none;border-color:var(--plum)}

/* ===== Article layout ===== */
.article-hero{padding:48px 0 24px;text-align:center}
.article-hero .cat-tag{display:inline-block;margin-bottom:16px}
.article-hero h1{margin-bottom:18px;max-width:18ch;margin-left:auto;margin-right:auto}
.article-meta{display:flex;justify-content:center;gap:18px;align-items:center;font-size:.88rem;color:var(--charcoal-soft);margin-bottom:28px}
.article-cover{max-width:var(--read);margin:0 auto 36px;padding:0 24px}
.article-cover img{width:100%;border-radius:14px;box-shadow:var(--shadow)}
.article-body{font-size:1.06rem;line-height:1.85;color:var(--charcoal)}
.article-body h2{font-size:1.6rem;margin:36px 0 14px}
.article-body h3{font-size:1.25rem;margin:28px 0 10px}
.article-body p{margin-bottom:1.3em}
.article-body ul,.article-body ol{margin:0 0 1.3em 1.3em}
.article-body li{margin-bottom:.5em}
.article-body blockquote{
  border-left:4px solid var(--coral);padding:8px 0 8px 22px;margin:28px 0;
  font-family:var(--serif);font-size:1.2rem;font-style:italic;color:var(--plum);
}
.article-body code{background:var(--plum-soft);padding:2px 6px;border-radius:4px;font-size:.9em;font-family:'SF Mono',Consolas,monospace}
.article-body pre{background:var(--charcoal);color:var(--cream);padding:18px;border-radius:10px;overflow-x:auto;margin:24px 0}
.article-body pre code{background:none;padding:0}
.article-body img{border-radius:10px;margin:24px 0}
.article-footer{max-width:var(--read);margin:48px auto;padding:32px 24px 0;border-top:1px solid var(--plum-line);text-align:center}
.article-nav{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:24px}
.article-nav a{font-weight:600;font-size:.92rem}

/* ===== Page hero (interior) ===== */
.page-hero{padding:64px 0 40px;text-align:center}
.page-hero h1{margin-bottom:14px}
.page-hero p{color:var(--charcoal-soft);max-width:52ch;margin:0 auto;font-size:1.08rem}

/* ===== Log index / filters ===== */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:36px}
.filter-bar button{
  background:transparent;border:1px solid var(--plum-line);color:var(--charcoal);
  padding:8px 16px;border-radius:20px;font-family:var(--sans);font-size:.85rem;font-weight:500;cursor:pointer;transition:all .18s;
}
.filter-bar button.active,.filter-bar button:hover{background:var(--plum);color:var(--cream);border-color:var(--plum)}

/* ===== About ===== */
.about-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:48px;align-items:start}
@media(max-width:820px){.about-grid{grid-template-columns:1fr}}
.about-portrait{border-radius:18px;overflow:hidden;aspect-ratio:3/4;box-shadow:var(--shadow)}
.about-portrait img{width:100%;height:100%;object-fit:cover}
.about-body h2{margin-top:32px;margin-bottom:12px}
.about-body h2:first-child{margin-top:0}
.values{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:24px 0}
@media(max-width:640px){.values{grid-template-columns:1fr}}
.value{padding:20px;background:#fff;border:1px solid var(--plum-line);border-radius:12px}
.value h3{color:var(--coral);font-size:1rem;margin-bottom:6px;font-family:var(--sans);text-transform:uppercase;letter-spacing:.05em}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:48px}
@media(max-width:820px){.contact-grid{grid-template-columns:1fr}}
.contact-form{background:#fff;border:1px solid var(--plum-line);border-radius:18px;padding:32px}
.field{margin-bottom:20px}
.field label{display:block;font-weight:600;font-size:.9rem;margin-bottom:6px;color:var(--plum)}
.field input,.field textarea,.field select{width:100%;padding:12px 14px;border:1px solid var(--plum-line);border-radius:10px;font-family:var(--sans);font-size:.95rem;background:var(--cream);color:var(--charcoal)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--plum)}
.field textarea{min-height:140px;resize:vertical}
.form-note{font-size:.82rem;color:var(--charcoal-soft);margin-top:12px}
.form-success{display:none;background:var(--sage);color:#fff;padding:14px 18px;border-radius:10px;margin-bottom:20px;font-weight:600}
.form-success.show{display:block}
.contact-info p{margin-bottom:16px}
.contact-info .info-row{display:flex;gap:14px;align-items:flex-start;margin-bottom:20px}
.contact-info .info-row strong{color:var(--plum)}

/* ===== Legal / sitemap pages ===== */
.legal-body{max-width:var(--read);margin:0 auto;padding:0 24px}
.legal-body h2{margin:36px 0 12px;font-size:1.4rem}
.legal-body h3{margin:24px 0 8px}
.legal-body p,.legal-body li{color:var(--charcoal-soft)}
.legal-body ul{margin:0 0 1.2em 1.2em}
.updated{font-size:.85rem;color:var(--charcoal-soft);font-style:italic;margin-bottom:32px}
.sitemap-list{list-style:none;margin:32px 0}
.sitemap-list li{margin-bottom:10px}
.sitemap-list .group{font-weight:700;color:var(--plum);margin-top:24px;font-family:var(--serif);font-size:1.15rem}

/* ===== Experiments page ===== */
.experiment-card{
  display:grid;grid-template-columns:140px 1fr;gap:24px;
  background:#fff;border:1px solid var(--plum-line);border-radius:14px;padding:24px;margin-bottom:20px;align-items:center;
}
@media(max-width:640px){.experiment-card{grid-template-columns:1fr}}
.experiment-stat{text-align:center}
.experiment-stat .big{font-family:var(--serif);font-size:2.4rem;color:var(--coral);font-weight:700;line-height:1}
.experiment-stat .label{font-size:.78rem;color:var(--charcoal-soft);text-transform:uppercase;letter-spacing:.05em;margin-top:4px}
.experiment-info h3{margin-bottom:6px}
.experiment-info .tags{display:flex;gap:8px;margin-top:10px;flex-wrap:wrap}
.experiment-info .tag{font-size:.72rem;background:var(--plum-soft);color:var(--plum);padding:3px 10px;border-radius:20px}

/* ===== 404 ===== */
.notfound{text-align:center;padding:80px 0}
.notfound .code{font-family:var(--serif);font-size:6rem;color:var(--coral);font-weight:700;line-height:1}
.notfound h1{margin:12px 0 16px}
.notfound p{color:var(--charcoal-soft);max-width:42ch;margin:0 auto 28px}

/* ===== Footer ===== */
.site-footer{background:var(--charcoal);color:var(--cream);padding:56px 0 28px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:760px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px;font-family:var(--serif);font-weight:700;font-size:1.3rem}
.footer-brand img{width:36px;height:36px;border-radius:8px}
.footer-grid p{color:rgba(245,239,231,.65);font-size:.92rem}
.footer-grid h4{color:var(--cream);font-family:var(--sans);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;margin-bottom:14px}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:8px}
.footer-grid a{color:rgba(245,239,231,.75);font-size:.92rem}
.footer-grid a:hover{color:var(--coral)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:.82rem;color:rgba(245,239,231,.5)}

/* ===== Motion ===== */
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:none}

/* utility */
.center{text-align:center}
.mt-s{margin-top:8px}.mt-m{margin-top:18px}.mt-l{margin-top:32px}
.mb-m{margin-bottom:18px}.mb-l{margin-bottom:32px}
.text-coral{color:var(--coral)}.text-sage{color:var(--sage)}
.divider{height:1px;background:var(--plum-line);margin:40px 0;border:none}
.breadcrumb{font-size:.85rem;color:var(--charcoal-soft);margin-bottom:20px}
.breadcrumb a{color:var(--charcoal-soft)}
.breadcrumb a:hover{color:var(--plum)}