/* =========================================================================
   DaltonApps — landing page (v1)
   Design tokens, then layout. Dark, restrained, single warm accent.
   ========================================================================= */

:root {
  /* color */
  --bg:        #0b0b0e;
  --bg-soft:   #14141a;
  --bg-card:   #15161c;
  --fg:        #f4f1ea;
  --fg-muted:  #9aa0a8;
  --fg-dim:    #6b7079;
  --accent:    #ffb454;
  --accent-soft: rgba(255, 180, 84, 0.14);
  --border:    rgba(244, 241, 234, 0.08);
  --border-strong: rgba(244, 241, 234, 0.16);

  /* type */
  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-serif: ui-serif, Georgia, "Iowan Old Style", "Apple Garamond", "Times New Roman", serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* spacing (8px base) */
  --s-1: 0.5rem;
  --s-2: 1rem;
  --s-3: 1.5rem;
  --s-4: 2rem;
  --s-5: 3rem;
  --s-6: 4.5rem;
  --s-7: 6rem;

  /* radius & motion */
  --radius: 14px;
  --radius-sm: 8px;
  --ease: cubic-bezier(.2, .7, .2, 1);
  --dur: 220ms;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* =========================================================================
   Header
   ========================================================================= */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-2) clamp(1rem, 4vw, 3rem);
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(11, 11, 14, 0.72);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  font-weight: 600;
  letter-spacing: 0.01em;
}
.brand-mark {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--accent);
  background: var(--bg-soft);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
}

.site-nav {
  display: flex;
  gap: clamp(0.75rem, 2.5vw, 1.75rem);
  font-size: 0.92rem;
  color: var(--fg-muted);
}
.site-nav a { transition: color var(--dur) var(--ease); }
.site-nav a:hover { color: var(--fg); }

/* =========================================================================
   Hero
   ========================================================================= */

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(4rem, 11vw, 8rem) clamp(1rem, 4vw, 3rem) clamp(5rem, 12vw, 9rem);
  border-bottom: 1px solid var(--border);
}

.hero-light {
  position: absolute;
  inset: -30%;
  background: radial-gradient(
    600px 600px at var(--mx, 30%) var(--my, 35%),
    rgba(255, 180, 84, 0.22),
    rgba(255, 180, 84, 0) 60%
  );
  pointer-events: none;
  transition: background var(--dur) var(--ease);
  z-index: 0;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 64rem;
  margin: 0 auto;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin: 0 0 var(--s-2);
}

h1 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.25rem, 6.4vw, 4.75rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-3);
  max-width: 22ch;
}
h1 em {
  font-style: italic;
  color: var(--fg);
}
h1 .accent { color: var(--accent); }

.lede {
  font-size: clamp(1.05rem, 1.7vw, 1.25rem);
  color: var(--fg-muted);
  max-width: 60ch;
  margin: 0 0 var(--s-4);
}

.hero-cta {
  display: flex;
  gap: var(--s-2);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5ch;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: transform var(--dur) var(--ease),
              background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #1a1206;
}
.btn-primary:hover { transform: translateY(-1px); background: #ffc377; }

.btn-ghost {
  color: var(--fg-muted);
  border-color: var(--border-strong);
}
.btn-ghost:hover { color: var(--fg); border-color: var(--fg-dim); }

/* =========================================================================
   Sections
   ========================================================================= */

.section {
  padding: clamp(4rem, 9vw, 7rem) clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border);
}

.section-header {
  max-width: 64rem;
  margin: 0 auto var(--s-5);
}

h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin: 0 0 var(--s-2);
}

.section-lede {
  color: var(--fg-muted);
  max-width: 58ch;
  margin: 0;
  font-size: 1.05rem;
}

/* Capabilities grid */
.cap-grid {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 64rem;
  display: grid;
  gap: var(--s-2);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.cap {
  position: relative;
  padding: var(--s-3);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background var(--dur) var(--ease);
}
.cap:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  background: #1a1b22;
}
.cap-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.08em;
}
.cap h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.35rem;
  margin: var(--s-1) 0 0.5rem;
  letter-spacing: -0.005em;
}
.cap p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.97rem;
}

/* "Coming next" */
.next {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}
.next-grid {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: 64rem;
  display: grid;
  gap: var(--s-2);
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  counter-reset: nx;
}
.next-card {
  position: relative;
  padding: var(--s-3);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.next-card:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.next-card h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.3rem;
  margin: var(--s-2) 0 0.5rem;
}
.next-card p {
  margin: 0;
  color: var(--fg-muted);
  font-size: 0.97rem;
}
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

/* Live-card variant: whole card is a link, has an "→" hover affordance. */
.tag-live {
  color: #0a1a10;
  background: #6fd49a;
}
.next-card-live { padding: 0; }
.next-card-link {
  display: block;
  padding: var(--s-3);
  color: inherit;
  border-radius: var(--radius);
}
.next-card-live .live-arrow {
  display: inline-block;
  margin-left: 0.25em;
  color: var(--accent);
  transition: transform var(--dur) var(--ease);
}
.next-card-live:hover .live-arrow { transform: translateX(4px); }

/* =========================================================================
   Footer
   ========================================================================= */

.site-footer {
  padding: var(--s-4) clamp(1rem, 4vw, 3rem) var(--s-5);
  color: var(--fg-dim);
  font-size: 0.9rem;
}
.footer-inner {
  max-width: 64rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s-2);
}
.footer-inner p { margin: 0; }
.footer-note { color: var(--fg-muted); }
.footer-note span[title] {
  border-bottom: 1px dotted var(--fg-dim);
  cursor: help;
}
.footer-meta { display: flex; gap: var(--s-2); }
.footer-meta a { color: var(--fg-muted); }
.footer-meta a:hover { color: var(--accent); }

/* =========================================================================
   Reveal-on-scroll
   ========================================================================= */

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 500ms var(--ease), transform 500ms var(--ease);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================================
   Reduced motion
   ========================================================================= */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* =========================================================================
   Narrow
   ========================================================================= */

@media (max-width: 540px) {
  .site-nav a:nth-child(1) { display: none; } /* nav too cramped */
  .hero-cta .btn { width: 100%; justify-content: center; }
}