/* ============================================================
   Rizenn Technologies — global styles
   Design: ultra minimal, alternating dark/light, geometric type
   ============================================================ */

:root {
  /* palette */
  --ink: #0A0D14;          /* deep near-black, slight navy */
  --ink-soft: #14181F;
  --paper: #FAFAF7;        /* warm off-white */
  --paper-pure: #FFFFFF;
  --line: #E6E4DD;         /* hairline on light */
  --line-dark: #1F242E;    /* hairline on dark */
  --muted: #6B6F76;        /* secondary on light */
  --muted-dark: #8A8F99;   /* secondary on dark */
  --accent: #2BA876;       /* emerald */
  --accent-soft: #4BC893;
  --accent-rgb: 43, 168, 118;

  /* type scale (fluid) */
  --fs-eyebrow: 0.8125rem;
  --fs-body: 1.0625rem;
  --fs-lede: clamp(1.0625rem, 0.95rem + 0.55vw, 1.25rem);
  --fs-display: clamp(2.25rem, 1.6rem + 3.5vw, 4.5rem);
  --fs-hero: clamp(4rem, 2.5rem + 9vw, 11rem);
  --fs-email: clamp(1.5rem, 1.05rem + 2.6vw, 2.875rem);

  /* spacing */
  --gutter: clamp(1.25rem, 1rem + 1.2vw, 2rem);
  --section-y: clamp(5rem, 4rem + 6vw, 9rem);

  /* motion */
  --ease: cubic-bezier(.2,.7,.2,1);
}

/* reset-ish */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11','ss01','ss03';
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

::selection { background: var(--accent); color: var(--paper-pure); }

/* ----- layout primitives ----- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-inline: var(--gutter);
}
.container--narrow {
  max-width: 760px;
}

.section {
  position: relative;
  padding-block: var(--section-y);
}
.section--hero {
  background: var(--ink);
  color: var(--paper);
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: clamp(6rem, 5rem + 6vw, 10rem);
  overflow: hidden;
}
.section--light {
  background: var(--paper);
  color: var(--ink);
}
.section--dark {
  background: var(--ink);
  color: var(--paper);
}
.section--contact {
  padding-bottom: clamp(6rem, 5rem + 6vw, 10rem);
}

/* hairlines between sections, very subtle */
.section + .section { border-top: 1px solid transparent; }
.section--light + .section--light { border-top-color: var(--line); }
.section--dark + .section--dark { border-top-color: var(--line-dark); }

/* ----- topbar (small, fixed) ----- */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.topbar.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.topbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem var(--gutter);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: 0.875rem;
  letter-spacing: -0.01em;
  color: #ffffff;
}
.topbar .mark {
  font-weight: 600;
}
.topbar .mark-text {
  mix-blend-mode: difference;
}
.topbar-meta {
  font-weight: 400;
  opacity: 0.7;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.6875rem;
  mix-blend-mode: difference;
}

/* ----- type primitives ----- */
.display {
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: var(--fs-display);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.02;
  margin: 0 0 clamp(1.75rem, 1.25rem + 1.5vw, 2.75rem);
  color: var(--ink);
  text-wrap: balance;
}
.display--light { color: var(--paper); }

.lede {
  max-width: 56ch;
  font-size: var(--fs-lede);
  line-height: 1.6;
  color: var(--muted);
}
.lede p + p { margin-top: 1.1em; }
.lede strong { color: var(--ink); font-weight: 600; }
.section--dark .lede { color: var(--muted-dark); }
.section--dark .lede strong { color: var(--paper); }

/* ----- hero ----- */
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-dark);
  margin-bottom: clamp(2rem, 1.5rem + 2vw, 3.5rem);
}

.hero-title {
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: var(--fs-hero);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.92;
  margin: 0;
  color: var(--paper);
}
.accent-dot {
  color: var(--accent);
  transition: color .35s var(--ease);
}

.hero-tagline {
  margin: clamp(1.5rem, 1rem + 1.6vw, 2.5rem) 0 0;
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: clamp(1.375rem, 1.05rem + 1.4vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--muted-dark);
  max-width: 26ch;
}

.hero-foot {
  margin-top: clamp(3rem, 2rem + 3vw, 5rem);
}
.scroll-cue {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-dark);
  transition: color .25s var(--ease), gap .25s var(--ease);
}
.scroll-cue svg { transition: transform .35s var(--ease); }
.scroll-cue:hover { color: var(--paper); gap: 0.85rem; }
.scroll-cue:hover svg { transform: translateY(2px); }

/* ----- products grid ----- */
.grid {
  margin-top: clamp(2.5rem, 2rem + 2.5vw, 4rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 0.75rem + 0.75vw, 1.5rem);
}
@media (min-width: 760px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: clamp(1.5rem, 1rem + 1.5vw, 2.5rem);
  background: var(--ink-soft);
  border: 1px solid var(--line-dark);
  border-radius: 4px;
  min-height: clamp(18rem, 16rem + 8vw, 24rem);
  transition: border-color .35s var(--ease), transform .35s var(--ease), background-color .35s var(--ease);
}
.card:hover {
  border-color: rgba(var(--accent-rgb), 0.45);
  transform: translateY(-2px);
}
.card--ghost {
  background: transparent;
  border-style: dashed;
  border-color: var(--line-dark);
}
.card--ghost:hover {
  border-color: var(--muted-dark);
  border-style: dashed;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.card-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
}
.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.2);
  transition: background-color .35s var(--ease), box-shadow .35s var(--ease);
}
.card-status--live .status-dot {
  background: #4ADE80;
  box-shadow: 0 0 0 3px rgba(74, 222, 128, 0.18);
}
.status-dot--idle {
  background: var(--muted-dark);
  box-shadow: none;
  opacity: 0.6;
}
.card-index {
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  opacity: 0.65;
}

.card-title {
  margin: auto 0 0;
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: clamp(1.875rem, 1.4rem + 1.6vw, 2.625rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
  color: var(--paper);
}
.card-desc {
  margin: 0;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--muted-dark);
  max-width: 42ch;
}
.card-foot {
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--line-dark);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-dark);
}

/* ----- contact ----- */
.email-link {
  display: inline-flex;
  align-items: center;
  gap: 0.875rem;
  margin-top: clamp(1rem, 0.5rem + 1vw, 1.5rem);
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-size: var(--fs-email);
  font-weight: 500;
  letter-spacing: -0.025em;
  color: var(--paper);
  transition: color .3s var(--ease), gap .3s var(--ease);
  border-bottom: 1px solid transparent;
  padding-bottom: 0.15em;
}
.email-link svg { transition: transform .35s var(--ease); }
.email-link:hover {
  color: var(--accent-soft);
  gap: 1.25rem;
}
.email-link:hover svg { transform: translateX(4px); }

/* ----- footer ----- */
.footer {
  background: var(--ink);
  color: var(--muted-dark);
  padding-block: 2.5rem;
  border-top: 1px solid var(--line-dark);
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
  justify-content: space-between;
}
@media (min-width: 600px) {
  .footer-inner {
    flex-direction: row;
    align-items: baseline;
  }
}
.footer-mark {
  font-family: 'Inter Tight', 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.footer-meta {
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-sep { opacity: 0.4; }

/* ----- reveal animations ----- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: 0s;
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"].is-in { transition-delay: .08s; }
.reveal[data-delay="2"].is-in { transition-delay: .16s; }
.reveal[data-delay="3"].is-in { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .topbar { transition: none; }
  * { animation: none !important; transition: none !important; }
}

/* ----- focus styles ----- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}