/* ═══════════════════════════════════════════════════════
   Keepra — Shared Marketing Layout
   Used by: landing.html, about.html, contact.html,
            help.html, privacy.html, terms.html
   ══════════════════════════════════════════════════════ */

/* ─── Tokens ───────────────────────────────────────────── */
:root {
  --f: -apple-system,BlinkMacSystemFont,'SF Pro Text','Segoe UI Variable','Segoe UI','Helvetica Neue',Arial,sans-serif;
  --mono: 'SF Mono','Cascadia Code','Fira Code','Consolas',monospace;
  --r: 12px; --rl: 18px; --rxl: 24px;
  --ease: cubic-bezier(.4,0,.2,1);
}
[data-theme="dark"] {
  --bg:     #0a0a0c; --bg2:    #111113;
  --surf:   #18181b; --surf2:  #1e1e22; --surf3: #27272b;
  --bdr:    rgba(255,255,255,.07); --bdr2: rgba(255,255,255,.12);
  --txt:    #f4f4f5; --txt2:   #a1a1aa; --txt3:  #52525b;
  --p:      #8b5cf6; --p2:     #a78bfa; --p3:    #c4b5fd;
  --pg:     linear-gradient(135deg,#7c3aed,#8b5cf6,#a78bfa);
  --glow:   rgba(139,92,246,.35); --glow2: rgba(139,92,246,.12);
  --nav-bg: rgba(10,10,12,.85);
  --card-sh:0 0 0 1px rgba(255,255,255,.06),0 24px 48px rgba(0,0,0,.6);
}
[data-theme="light"] {
  --bg:     #fafafa; --bg2:    #f4f4f5;
  --surf:   #ffffff; --surf2:  #f8f8fb; --surf3: #ededf0;
  --bdr:    rgba(0,0,0,.07); --bdr2: rgba(0,0,0,.14);
  --txt:    #09090b; --txt2:   #52525b; --txt3:  #a1a1aa;
  --p:      #7c3aed; --p2:     #8b5cf6; --p3:    #a78bfa;
  --pg:     linear-gradient(135deg,#6d28d9,#7c3aed,#8b5cf6);
  --glow:   rgba(124,58,237,.25); --glow2: rgba(124,58,237,.08);
  --nav-bg: rgba(250,250,250,.88);
  --card-sh:0 0 0 1px rgba(0,0,0,.06),0 24px 48px rgba(0,0,0,.1);
}

/* ─── Reset ────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body{background:var(--bg);color:var(--txt);font-family:var(--f);font-size:16px;line-height:1.6;transition:background .3s,color .3s;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{font-family:var(--f);cursor:pointer;border:none;outline:none;background:none}
img{max-width:100%;display:block}

/* ─── Utilities ────────────────────────────────────────── */
.ctr{max-width:1360px;margin:0 auto;padding:0 40px}
.nav-w{width:100%;padding:0 40px;box-sizing:border-box}
.gtext{background:var(--pg);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:.7rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:5px 12px;border-radius:100px;border:1px solid rgba(139,92,246,.3);background:rgba(139,92,246,.1);color:var(--p2)}
.section-tag{font-size:.68rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--p);margin-bottom:12px}
.sec-hd{text-align:center;margin-bottom:56px}
.sec-hd h2{font-size:clamp(1.9rem,3.5vw,2.8rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;margin-bottom:14px}
.sec-hd p{font-size:.97rem;color:var(--txt2);max-width:520px;margin:0 auto;line-height:1.75}

/* ─── Buttons ──────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;border-radius:var(--r);transition:all .2s var(--ease);cursor:pointer;border:none;font-family:var(--f);white-space:nowrap}
.btn-pr{background:var(--pg);color:#fff;padding:13px 28px;font-size:.93rem;box-shadow:0 0 0 1px rgba(139,92,246,.5),0 8px 32px var(--glow)}
.btn-pr:hover{filter:brightness(1.1);transform:translateY(-2px)}
.btn-gh{background:var(--surf2);color:var(--txt2);padding:13px 24px;font-size:.93rem;border:1px solid var(--bdr2)}
.btn-gh:hover{background:var(--surf3);color:var(--txt);transform:translateY(-2px)}
.btn-sm{padding:9px 20px;font-size:.8rem}

/* ─── Navigation ───────────────────────────────────────── */
#nav{
  position:fixed;top:0;left:0;right:0;z-index:900;
  height:64px;background:var(--nav-bg);
  backdrop-filter:saturate(200%) blur(24px);-webkit-backdrop-filter:saturate(200%) blur(24px);
  border-bottom:1px solid transparent;
  transition:border-color .3s,background .3s;
}
#nav.scrolled{border-bottom-color:var(--bdr)}
.nav-i{display:flex;align-items:center;height:64px}
.nav-logo{display:flex;align-items:center;margin-right:auto;flex-shrink:0;transition:opacity .2s}
.nav-logo:hover{opacity:.8}
.nav-logo img{height:30px;width:auto}
.nav-links{display:flex;align-items:center;margin-right:24px}
.nav-links a{
  font-size:.83rem;font-weight:500;color:var(--txt2);
  padding:6px 14px;border-radius:8px;position:relative;
  transition:color .2s;
}
.nav-links a::after{content:'';position:absolute;bottom:2px;left:14px;right:14px;height:1.5px;background:var(--p);border-radius:2px;transform:scaleX(0);transition:transform .2s var(--ease)}
.nav-links a:hover{color:var(--txt)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--txt)}
.nav-right{display:flex;align-items:center;gap:10px;flex-shrink:0}
.theme-btn{
  width:36px;height:36px;border-radius:10px;
  background:var(--surf2);border:1px solid var(--bdr);
  color:var(--txt2);font-size:1rem;
  display:flex;align-items:center;justify-content:center;
  transition:all .2s;
}
.theme-btn:hover{background:var(--surf3);color:var(--txt)}
.btn-cta-nav{
  font-size:.82rem;font-weight:700;padding:8px 20px;border-radius:10px;
  background:var(--pg);color:#fff;
  box-shadow:0 4px 16px var(--glow);
  transition:all .2s;display:inline-flex;align-items:center;gap:7px;
}
.btn-cta-nav:hover{filter:brightness(1.1);transform:translateY(-1px)}
@media(max-width:720px){.nav-links{display:none}}

/* ─── Page hero (inner pages) ──────────────────────────── */
.page-hero{
  padding:120px 0 64px;text-align:center;
  position:relative;overflow:hidden;
}
.page-hero::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 70% 60% at 50% 0%,var(--glow2),transparent 70%);
}
.page-hero .section-tag{margin-bottom:14px}
.page-hero h1{
  font-size:clamp(2.2rem,4.5vw,3.4rem);
  font-weight:800;letter-spacing:-.04em;line-height:1.1;
  margin-bottom:18px;position:relative;
}
.page-hero p{font-size:1.05rem;color:var(--txt2);max-width:540px;margin:0 auto;line-height:1.75;position:relative}

/* ─── Content sections ─────────────────────────────────── */
.content-sec{padding:72px 0}
.content-sec-alt{padding:72px 0;background:var(--bg2)}

/* ─── Footer ───────────────────────────────────────────── */
footer{background:var(--bg);border-top:1px solid var(--bdr);padding:56px 0 32px}
.ft-grid{display:grid;grid-template-columns:2.2fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.ft-brand img{height:28px;margin-bottom:14px}
.ft-brand p{font-size:.79rem;color:var(--txt2);line-height:1.75;margin-bottom:18px;max-width:260px}
.ft-soc{display:flex;gap:8px}
.ft-soc a{
  width:35px;height:35px;border-radius:9px;
  background:var(--surf2);border:1px solid var(--bdr);
  display:flex;align-items:center;justify-content:center;
  font-size:.95rem;color:var(--txt2);transition:all .2s;
}
.ft-soc a:hover{background:var(--p);border-color:var(--p);color:#fff}
.ft-col h4{font-size:.68rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--txt3);margin-bottom:14px}
.ft-col a{display:block;font-size:.81rem;color:var(--txt2);padding:4px 0;transition:color .2s}
.ft-col a:hover{color:var(--p2)}
.ft-btm{
  border-top:1px solid var(--bdr);padding-top:24px;
  display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  font-size:.73rem;color:var(--txt3);
}
@media(max-width:680px){
  .ft-grid{grid-template-columns:1fr 1fr}
  .ft-brand{grid-column:1/-1}
  .ft-btm{flex-direction:column;text-align:center}
}

/* ─── Reveal animations ────────────────────────────────── */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.show{opacity:1;transform:none}
.reveal-l{opacity:0;transform:translateX(-24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal-l.show{opacity:1;transform:none}
.reveal-r{opacity:0;transform:translateX(24px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal-r.show{opacity:1;transform:none}

/* ─── Mobile ───────────────────────────────────────────── */
@media(max-width:720px){
  .ctr  {padding:0 20px}
  .nav-w{padding:0 20px}
}
@media(max-width:640px){
  .page-hero       {padding:96px 0 44px}
  .content-sec     {padding:52px 0}
  .content-sec-alt {padding:52px 0}
  .sec-hd          {margin-bottom:36px}
  footer           {padding:40px 0 24px}
  .ft-grid         {grid-template-columns:1fr 1fr}
  .ft-btm          {flex-direction:column;text-align:center}
}
@media(max-width:480px){
  .ft-grid  {grid-template-columns:1fr}
  .ft-brand {grid-column:auto}
  .page-hero h1{font-size:clamp(1.8rem,8vw,2.5rem)}
}