/* ══════════════════════════════════════════════
   GoodSleep — Shared Stylesheet
   https://goodsleep.rest
   ══════════════════════════════════════════════ */

/* ── RESET & TOKENS ── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --teal:#1D9E75;--teal-light:#E1F5EE;--teal-dark:#0F6E56;--teal-mid:#5DCAA5;
  --purple:#534AB7;--purple-light:#EEEDFE;
  --amber:#EF9F27;--amber-light:#FFF3DC;
  --red:#E24B4A;
  --text:#111827;--text-muted:#6b7280;--text-hint:#9ca3af;
  --bg:#ffffff;--bg-soft:#f3f4f6;--bg-card:#ffffff;
  --border:#e5e7eb;--shadow:0 2px 12px rgba(0,0,0,0.07);
  --r:14px;--r-sm:8px;
  --font:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
}
/* Dark mode: system preference OR manual toggle */
@media(prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --text:#f9fafb;--text-muted:#9ca3af;--text-hint:#6b7280;
    --bg:#0d1117;--bg-soft:#161b22;--bg-card:#1c2128;
    --border:#30363d;--shadow:0 2px 16px rgba(0,0,0,0.4);
    --teal-light:#042C1E;--purple-light:#1e1a3f;--amber-light:#2d1f00;
  }
}
:root[data-theme="dark"]{
  --text:#f9fafb;--text-muted:#9ca3af;--text-hint:#6b7280;
  --bg:#0d1117;--bg-soft:#161b22;--bg-card:#1c2128;
  --border:#30363d;--shadow:0 2px 16px rgba(0,0,0,0.4);
  --teal-light:#042C1E;--purple-light:#1e1a3f;--amber-light:#2d1f00;
}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;overflow-x:hidden;transition:background .3s,color .3s}

/* ── NAV ── */
nav{border-bottom:1px solid var(--border);padding:0 clamp(1rem,4vw,2rem);display:flex;align-items:center;justify-content:space-between;height:58px;position:sticky;top:0;background:var(--bg);z-index:100;backdrop-filter:blur(8px);transition:background .3s,border-color .3s}
.logo{font-size:16px;font-weight:700;color:var(--teal-dark);text-decoration:none;display:flex;align-items:center;gap:8px;letter-spacing:-0.3px}
.logo-moon{font-size:20px}
.nav-right{display:flex;align-items:center;gap:clamp(0.75rem,2vw,1.5rem)}
nav ul{list-style:none;display:flex;gap:clamp(0.75rem,2vw,1.5rem)}
nav ul a{font-size:14px;color:var(--text-muted);text-decoration:none;transition:color .15s}
nav ul a:hover,nav ul a.active{color:var(--teal)}
.nav-mobile-hide{display:flex}
@media(max-width:600px){.nav-mobile-hide{display:none}}

/* ── THEME TOGGLE ── */
.theme-toggle{background:none;border:1.5px solid var(--border);border-radius:50px;width:40px;height:40px;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:18px;transition:all .3s;color:var(--text-muted);flex-shrink:0}
.theme-toggle:hover{border-color:var(--teal);color:var(--teal);background:var(--teal-light);transform:rotate(30deg)}

/* ── EXPLORE DROPDOWN ── */
.explore-btn{background:var(--teal);color:#fff;border:none;border-radius:50px;padding:8px 18px;font-size:13px;font-weight:700;cursor:pointer;font-family:var(--font);display:flex;align-items:center;gap:6px;transition:all .2s;flex-shrink:0}
.explore-btn:hover{background:var(--teal-dark);transform:translateY(-1px);box-shadow:0 4px 16px rgba(29,158,117,0.3)}
.explore-btn .arrow{transition:transform .2s;font-size:10px}
.explore-btn.open .arrow{transform:rotate(180deg)}
.explore-drop{position:fixed;top:58px;left:0;right:0;background:var(--bg-card);border-bottom:1.5px solid var(--border);box-shadow:0 8px 32px rgba(0,0,0,0.12);z-index:99;display:none;padding:1.5rem clamp(1rem,4vw,2rem);animation:slideDown .25s ease}
.explore-drop.open{display:block}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.drop-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:8px;max-width:900px;margin:0 auto}
.drop-link{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--r-sm);text-decoration:none;color:var(--text);font-size:14px;font-weight:500;transition:all .15s;border:1.5px solid transparent}
.drop-link:hover{background:var(--teal-light);border-color:var(--teal);color:var(--teal-dark)}
.drop-link .dl-emoji{font-size:18px;flex-shrink:0}
.drop-link .dl-label{line-height:1.3}
.drop-link .dl-sub{display:block;font-size:11px;color:var(--text-hint);font-weight:400}
.drop-divider{border-top:1px solid var(--border);margin:12px 0;grid-column:1/-1}
@media(max-width:600px){.drop-grid{grid-template-columns:1fr 1fr}}

/* ── HERO ── */
.hero{text-align:center;padding:clamp(2rem,6vw,4rem) clamp(1rem,4vw,2rem) clamp(1.5rem,4vw,2.5rem);position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(29,158,117,0.08),transparent);pointer-events:none}
.hero h1{font-size:clamp(24px,5.5vw,48px);font-weight:800;letter-spacing:-1px;line-height:1.15;margin-bottom:0.75rem;background:linear-gradient(135deg,var(--teal-dark),var(--teal));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-sub{font-size:clamp(14px,2vw,17px);color:var(--text-muted);max-width:520px;margin:0 auto 0.75rem}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:var(--teal-light);color:var(--teal-dark);font-size:13px;font-weight:500;padding:5px 14px;border-radius:50px;margin-top:0.5rem}
.breadcrumb{font-size:13px;color:var(--text-hint);text-align:center;margin-top:0.5rem}
.breadcrumb a{color:var(--text-muted);text-decoration:none}
.breadcrumb a:hover{color:var(--teal)}

/* ── STARS (hero animation) ── */
.stars{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;overflow:hidden}
.star{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--teal-mid);opacity:0;animation:twinkle var(--d,3s) ease-in-out infinite var(--delay,0s)}
@keyframes twinkle{0%,100%{opacity:0;transform:scale(0.5)}50%{opacity:0.7;transform:scale(1)}}

/* ── LAYOUT ── */
.page{max-width:760px;margin:0 auto;padding:0 clamp(1rem,4vw,1.5rem) 5rem}

/* ── CARD ── */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--r);padding:clamp(1.25rem,4vw,2rem);margin-bottom:1.5rem;box-shadow:var(--shadow)}

/* ── BUTTON ── */
.btn{width:100%;padding:clamp(12px,3vw,15px);background:var(--teal);color:#fff;border:none;border-radius:var(--r-sm);font-size:clamp(14px,2.5vw,16px);font-weight:700;cursor:pointer;font-family:var(--font);transition:all .2s;display:flex;align-items:center;justify-content:center;gap:8px;letter-spacing:-0.2px;position:relative;overflow:hidden}
.btn::after{content:'';position:absolute;inset:0;background:rgba(255,255,255,0);transition:background .2s}
.btn:hover{background:var(--teal-dark);transform:translateY(-1px);box-shadow:0 4px 16px rgba(29,158,117,0.35)}
.btn:active{transform:translateY(0);box-shadow:none}
.btn-icon{font-size:18px;transition:transform .2s}
.btn:hover .btn-icon{transform:translateX(3px)}
.btn-outline{flex:1;padding:10px;background:transparent;border:1.5px solid var(--border);border-radius:var(--r-sm);font-size:14px;font-weight:600;cursor:pointer;font-family:var(--font);color:var(--text);transition:all .2s}
.btn-outline:hover{border-color:var(--teal);color:var(--teal-dark)}
.btn-sm{padding:10px 20px;font-size:14px}

/* ── SECTION ── */
.section{margin-bottom:2.5rem}
.section-title{font-size:clamp(17px,3vw,22px);font-weight:700;margin-bottom:0.5rem;letter-spacing:-0.3px}
.section-sub{font-size:14px;color:var(--text-muted);margin-bottom:1.25rem}

/* ── TIP BOX ── */
.tip-box{border-left:3px solid var(--teal);padding:12px 16px;background:var(--teal-light);border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:14px;color:var(--teal-dark);line-height:1.7;margin-bottom:1.5rem}

/* ── INFO CARDS ── */
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px;margin-bottom:1.5rem}
.info-card{background:var(--bg-card);border:1.5px solid var(--border);border-radius:var(--r);padding:1.25rem;transition:border-color .2s}
.info-card:hover{border-color:var(--teal-mid)}
.info-card h3{font-size:15px;font-weight:700;margin-bottom:6px}
.info-card p{font-size:13px;color:var(--text-muted);line-height:1.6}

/* ── CTA BOX ── */
.cta-box{background:var(--teal-light);border:1.5px solid var(--teal);border-radius:var(--r);padding:1.5rem;text-align:center;margin:2rem 0}
.cta-box h3{font-size:18px;font-weight:700;color:var(--teal-dark);margin-bottom:0.5rem}
.cta-box p{font-size:14px;color:var(--text-muted);margin-bottom:1rem}
.cta-box .btn{width:auto;display:inline-flex;padding:12px 28px}

/* ── NAV PILLS (sub-page navigation) ── */
.nav-pills{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:2rem;padding:0 0.25rem}
.pill{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border:1.5px solid var(--border);border-radius:50px;font-size:13px;color:var(--text-muted);text-decoration:none;font-weight:500;transition:all .15s;white-space:nowrap}
.pill:hover{border-color:var(--teal-mid);color:var(--teal-dark);background:var(--teal-light)}
.pill.active{border-color:var(--teal);color:var(--teal-dark);background:var(--teal-light);font-weight:600}

/* ── NAV PAGE LINKS (calculator sub-pages) ── */
.nav-pages{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:2rem}
.nav-page-link{display:inline-flex;align-items:center;gap:5px;padding:7px 14px;border:1.5px solid var(--border);border-radius:50px;font-size:13px;color:var(--text-muted);text-decoration:none;font-weight:500;transition:all .15s;white-space:nowrap}
.nav-page-link:hover{border-color:var(--teal-mid);color:var(--teal-dark);background:var(--teal-light)}
.nav-page-link.active{border-color:var(--teal);color:var(--teal-dark);background:var(--teal-light);font-weight:600}

/* ── FAQ ── */
.faq{border-top:1px solid var(--border);padding-top:1.5rem}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{width:100%;padding:1rem 0;text-align:left;background:none;border:none;cursor:pointer;font-size:15px;font-weight:500;color:var(--text);font-family:var(--font);display:flex;justify-content:space-between;align-items:center;gap:1rem}
.faq-q:hover{color:var(--teal-dark)}
.faq-icon{font-size:20px;transition:transform .2s;color:var(--text-hint);flex-shrink:0}
.faq-a{display:none;padding:0 0 1rem;font-size:14px;color:var(--text-muted);line-height:1.7}
.faq-a.open{display:block;animation:fadeIn .2s ease}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}

/* ── EXPLORE / RELATED TOOLS ── */
.explore{margin:2.5rem 0}
.explore-title{font-size:clamp(17px,3vw,22px);font-weight:700;margin-bottom:0.5rem;letter-spacing:-0.3px}
.explore-sub{font-size:14px;color:var(--text-muted);margin-bottom:1.25rem}
.explore-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media(max-width:640px){.explore-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:400px){.explore-grid{grid-template-columns:1fr}}
.explore-card{border:1.5px solid var(--border);border-radius:var(--r);padding:1.25rem 1rem;text-decoration:none;color:var(--text);transition:all .2s;background:var(--bg-card);display:block}
.explore-card:hover{border-color:var(--teal);transform:translateY(-3px);box-shadow:0 6px 20px rgba(29,158,117,0.15)}
.explore-card .e-emoji{font-size:28px;margin-bottom:8px}
.explore-card .e-title{font-size:14px;font-weight:700;margin-bottom:4px;color:var(--text)}
.explore-card .e-desc{font-size:12px;color:var(--text-muted);line-height:1.5}

/* ── FOOTER ── */
footer{border-top:1px solid var(--border);padding:2rem clamp(1rem,4vw,2rem);text-align:center;font-size:13px;color:var(--text-hint)}
footer a{color:var(--text-muted);text-decoration:none}
footer a:hover{color:var(--teal)}
footer a.active{color:var(--teal)}
.footer-links{display:flex;justify-content:center;gap:1.5rem;margin-bottom:0.75rem;flex-wrap:wrap}
.footer-disclaimer{margin-top:0.5rem;max-width:500px;margin-left:auto;margin-right:auto}

/* ── BACK TO TOP ── */
.back-top{position:fixed;bottom:1.5rem;right:1.5rem;width:42px;height:42px;background:var(--teal);color:#fff;border:none;border-radius:50%;font-size:20px;cursor:pointer;box-shadow:0 2px 12px rgba(29,158,117,0.4);display:none;align-items:center;justify-content:center;transition:all .2s;z-index:50}
.back-top.show{display:flex}
.back-top:hover{background:var(--teal-dark);transform:translateY(-2px)}

/* ── ANIMATIONS ── */
@keyframes slideUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:0.5;transform:scale(0.7)}}

/* ── TABLE ── */
.data-table{width:100%;border-collapse:collapse;font-size:14px;margin-bottom:1.5rem}
.data-table th{background:var(--bg-soft);font-weight:600;text-align:left;padding:10px 12px;border-bottom:2px solid var(--border);font-size:13px;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em}
.data-table td{padding:10px 12px;border-bottom:1px solid var(--border);color:var(--text)}
.data-table tr:hover{background:var(--teal-light)}

/* ── RANGE SLIDER ── */
input[type=range]{width:100%;-webkit-appearance:none;height:6px;border-radius:50px;background:var(--border);outline:none;cursor:pointer}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--teal);border:3px solid var(--bg-card);box-shadow:0 1px 6px rgba(0,0,0,0.2);cursor:pointer;transition:transform .15s}
input[type=range]::-webkit-slider-thumb:hover{transform:scale(1.15)}