/* Periodic Code - v1
   Modern, calm, privacy-first studio site
*/

:root{
  --primary: #000053;
  --bg: #fbfbfc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --border: rgba(15, 23, 42, 0.10);
  --shadow: 0 10px 30px rgba(2, 6, 23, 0.10);

  --radius: 16px;
  --radius-sm: 12px;

  --container: 1120px;

  --space-1: 6px;
  --space-2: 10px;
  --space-3: 14px;
  --space-4: 18px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 44px;
  --space-8: 60px;

  --focus: 0 0 0 4px rgba(0, 0, 83, 0.18);
}

*{ box-sizing:border-box; }
html, body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(800px 400px at 20% -10%, rgba(0,0,83,0.10), transparent 55%),
              radial-gradient(900px 450px at 90% -15%, rgba(0,0,83,0.08), transparent 60%),
              var(--bg);
  line-height:1.55;
}

a{ color: var(--primary); text-decoration: none; }
a:hover{ text-decoration: underline; }
img{ max-width:100%; display:block; }
code{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }

.container{
  width: min(100% - 40px, var(--container));
  margin-inline: auto;
}

.sr-only{
  position:absolute !important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}

/* Header / Nav */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 251, 252, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header__inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  gap: var(--space-4);
}

.brand{
  display:flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  letter-spacing: -0.02em;
  font-size: 18px;
  text-decoration:none !important;
}

.brand__logo{
  padding: 10px;
  display: block;
  border-radius: 16px;
  box-shadow: 0 10px 20px rgba(2,6,23,0.10);
  background: #fff;
}

.site-logo{
  height: 56px;
  width: auto;
}

.brand__text{
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}

.brand__mark{ color: var(--text); }
.brand__mark--alt{ color: var(--primary); }

.site-nav{
  display:flex;
  align-items:center;
  gap: 14px;
}

.site-nav--simple{ gap: 16px; }

.nav-link{
  color: var(--text);
  opacity: 0.86;
  padding: 8px 10px;
  border-radius: 10px;
  text-decoration:none !important;
}

.nav-link:hover{ background: rgba(0,0,83,0.06); opacity: 1; }
.nav-link.is-active{
  background: rgba(0,0,83,0.08);
  opacity: 1;
}

.nav-toggle{
  display:none;
  border:1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 10px 10px;
  box-shadow: 0 6px 16px rgba(2,6,23,0.08);
}

.nav-toggle__bar{
  display:block;
  width: 20px;
  height: 2px;
  background: var(--text);
  margin: 4px 0;
  border-radius: 2px;
}

/* Announcement */
.announcement{
  background: linear-gradient(90deg, rgba(0,0,83,0.95), rgba(0,0,83,0.88));
  color: #fff;
}
.announcement__inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 10px 0;
}

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 8px;
  border-radius: 999px;
  padding: 12px 16px;
  border: 1px solid transparent;
  font-weight: 650;
  letter-spacing: -0.01em;
  text-decoration: none !important;
  cursor: pointer;
  user-select:none;
}

.btn:focus-visible{ outline: none; box-shadow: var(--focus); }

.btn--sm{ padding: 9px 12px; font-size: 14px; }
.btn--primary{
  background: var(--primary);
  color: #fff;
  box-shadow: 0 10px 22px rgba(0,0,83,0.22);
}
.btn--primary:hover{ filter: brightness(1.05); }
.btn--secondary{
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  box-shadow: 0 10px 18px rgba(2,6,23,0.08);
}
.btn--secondary:hover{ background: rgba(0,0,83,0.04); }
.btn--ghost{
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.25);
}
.btn--ghost:hover{ background: rgba(255,255,255,0.10); }

/* Typography */
.h1{
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 0 0 var(--space-4);
}
.h2{
  font-size: clamp(22px, 2.2vw, 30px);
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-2);
}
.h3{
  font-size: 18px;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-2);
}
.lead{
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 var(--space-5);
  max-width: 60ch;
}
.muted{ color: var(--muted); }
.mt-12{ margin-top: 12px; }
.mt-24{ margin-top: 24px; }

/* Layout sections */
.section{ padding: var(--space-8) 0; }
.section--alt{ background: rgba(0,0,83,0.03); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section__head{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.section__head p{ margin: 0; }

.hero{ padding: var(--space-8) 0; }
.hero--compact{ padding: var(--space-7) 0; }
.hero__grid{
  display:grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-7);
  align-items: center;
}
.hero__card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: var(--space-5);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* Components */
.actions{ display:flex; gap: 12px; flex-wrap: wrap; margin-bottom: var(--space-5); }
.trust-row{ display:flex; gap: 12px; flex-wrap: wrap; align-items: center; margin: var(--space-3) 0; }

.pill{
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.60);
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 10px 22px rgba(2,6,23,0.06);
  padding: var(--space-5);
}

.card--subtle{
  background: rgba(255,255,255,0.70);
}

.card__icon{
  width: 42px; height: 42px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius: 14px;
  background: rgba(0,0,83,0.06);
  border: 1px solid rgba(0,0,83,0.12);
  margin-bottom: var(--space-3);
}

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.grid-2{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}

.privacy-grid{
  align-items: stretch;
}

.privacy-grid .card{
  height: 100%;
  display: flex;
  flex-direction: column;
}

.split{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-6);
  align-items: start;
}

.list{
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}
.list li{ margin: 8px 0; }

.device-frame{
  border-radius: 26px;
  border: 1px solid var(--border);
  overflow:hidden;
  background: linear-gradient(180deg, rgba(0,0,83,0.08), rgba(0,0,83,0.02));
  box-shadow: 0 14px 28px rgba(2,6,23,0.10);
}

.device-frame__top{
  height: 28px;
  background: rgba(15,23,42,0.08);
}


.device-frame__screen{
  padding: 18px;
}

.device-frame--image{
  max-height: clamp(320px, 52vh, 440px);
  display:flex;
  flex-direction: column;
}

.device-frame--image .device-frame__screen{
  padding: 0;
  background: #303d6f;
}

.device-frame__image{
  display:block;
  width:100%;
  height:auto;
}

.device-frame--image .device-frame__image{
  max-height: clamp(320px, 52vh, 440px);
  object-fit: contain;
  margin: 0 auto;
}

.placeholder-lines .line{
  height: 10px;
  border-radius: 999px;
  background: rgba(15,23,42,0.10);
  margin: 10px 0;
}
.line.w-80{ width: 80%; }
.line.w-60{ width: 60%; }
.line.w-90{ width: 90%; }
.line.w-50{ width: 50%; }

.placeholder-cards{
  display:grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 14px;
}
.mini-card{
  height: 44px;
  border-radius: 14px;
  background: rgba(255,255,255,0.70);
  border: 1px solid var(--border);
}

.code-chip{
  display:inline-flex;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(0,0,83,0.06);
  border: 1px solid rgba(0,0,83,0.12);
  color: var(--text);
}

.contact-row{
  display:flex;
  align-items:center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

/* FAQ */
.faq{ margin-top: 12px; }
.faq__item{
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  background: var(--surface);
  margin-bottom: 12px;
}
.faq__item summary{
  cursor: pointer;
  font-weight: 650;
}
.faq__item p{ color: var(--muted); margin: 10px 0 0; }

/* Prose pages */
.prose{
  max-width: 76ch;
}
.prose h1, .prose h2{ margin-top: 0; }
.prose h2{ margin-top: 26px; }
.prose p, .prose li{ color: var(--muted); }

/* Footer */
.site-footer{
  border-top: 1px solid var(--border);
  padding: var(--space-7) 0 var(--space-5);
  background: rgba(255,255,255,0.55);
}

.brand--footer{ font-size: 16px; margin-bottom: 8px; }
.brand--footer .brand__logo{ box-shadow: none; }
.brand--footer .site-logo{ height: 36px; }

.footer__grid{
  display:flex;
  align-items:flex-start;
  justify-content: space-between;
  gap: var(--space-6);
}
.footer__links{
  display:flex;
  flex-direction: column;
  gap: 8px;
}
.footer__bottom{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: var(--space-4);
  border-top: 1px solid var(--border);
  padding-top: var(--space-4);
  margin-top: var(--space-6);
}

/* Responsive */
@media (max-width: 960px){
  .hero__grid{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .split{ grid-template-columns: 1fr; }
  .section__head{ flex-direction: column; align-items: flex-start; }
}

@media (max-width: 768px){
  .site-logo{ height: 48px; }
}

@media (max-width: 760px){
  .nav-toggle{ display:inline-flex; }

  .site-nav{
    position: absolute;
    top: 64px;
    right: 20px;
    left: 20px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    box-shadow: var(--shadow);
    display:none;
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav.is-open{ display:flex; }
  .nav-link{ padding: 10px 12px; }
  .footer__grid{ flex-direction: column; }
}