/* LetsBoxIt — shared styles. Light theme with teal #1BA2A0 brand accent. */

:root {
  --bg: #FFFFFF;
  --bg-elev-1: #F7F8F9;
  --bg-elev-2: #F1F2F4;
  --bg-elev-3: #E8EAEC;
  --border: rgba(10, 12, 16, 0.08);
  --border-strong: rgba(10, 12, 16, 0.16);
  --text: #0A0C10;
  --text-2: #3A4049;
  --text-3: #6B727C;
  --text-4: #9AA1AB;

  --accent: #1BA2A0;
  --accent-hover: #178B89;
  --accent-deep: #0E5F5E;
  --accent-soft: rgba(27, 162, 160, 0.10);
  --accent-2: #1BA2A0;
  --accent-3: #0E5F5E;

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;

  --container: 1200px;
  --gutter: clamp(20px, 4vw, 40px);

  --font-display: 'Poppins', 'Nunito', system-ui, sans-serif;
  --font-body: 'Nunito', 'Poppins', system-ui, -apple-system, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, 'SFMono-Regular', monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
  font-weight: 500;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Subtle ambient backdrop tint */
body::before {
  content: '';
  position: fixed;
  inset: -10% -10% auto -10%;
  height: 700px;
  background:
    radial-gradient(ellipse 60% 50% at 20% 0%, rgba(27, 162, 160, 0.10), transparent 60%),
    radial-gradient(ellipse 50% 40% at 80% 10%, rgba(27, 162, 160, 0.06), transparent 60%);
  pointer-events: none;
  z-index: 0;
  filter: blur(20px);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: none; }

input, textarea, select {
  font: inherit;
  color: inherit;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  width: 100%;
  outline: none;
  transition: border-color 160ms var(--ease-out), background 160ms var(--ease-out), box-shadow 160ms var(--ease-out);
}
input:focus, textarea:focus, select:focus {
  border-color: var(--accent);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(27, 162, 160, 0.18);
}
input::placeholder, textarea::placeholder { color: var(--text-4); }
label { display: block; font-size: 12px; color: var(--text-3); margin-bottom: 6px; letter-spacing: 0.02em; text-transform: uppercase; font-family: var(--font-mono); }

/* ───── Layout ───── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 1; }
main { position: relative; z-index: 1; }

/* ───── Typography ───── */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--text);
  text-wrap: balance;
}
h1 { font-size: clamp(44px, 6.4vw, 80px); letter-spacing: -0.02em; font-weight: 700; line-height: 1.05; }
h2 { font-size: clamp(30px, 3.8vw, 48px); letter-spacing: -0.015em; }
h3 { font-size: clamp(22px, 2.4vw, 28px); letter-spacing: -0.005em; }
h4 { font-size: 18px; letter-spacing: 0; }

p { color: var(--text-2); text-wrap: pretty; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--text-3);
  display: inline-flex; align-items: center; gap: 8px;
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 999px;
  background: var(--accent); box-shadow: 0 0 12px var(--accent);
}

.lead { font-size: clamp(16px, 1.4vw, 19px); color: var(--text-2); max-width: 56ch; }
.muted { color: var(--text-3); }

.gradient-text {
  background: linear-gradient(180deg, #0A0C10 0%, #3A4049 90%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

.accent-text {
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-deep) 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ───── Nav ───── */
.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(255, 255, 255, 0.78);
  border-bottom: 1px solid var(--border);
}
.nav-inner { height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 600;
  letter-spacing: -0.02em; font-size: 16px;
  color: var(--text);
}
.brand-mark { width: 24px; height: 24px; display: grid; place-items: center; color: var(--accent); }
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a {
  display: inline-block; padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--text-2);
  transition: color 160ms var(--ease-out), background 160ms var(--ease-out);
}
.nav-links a:hover { color: var(--text); background: var(--bg-elev-2); }
.nav-links a.active { color: var(--accent); }
.nav-cta { display: flex; gap: 8px; align-items: center; }
@media (max-width: 760px) { .nav-links { display: none; } }

/* ───── Buttons ───── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px; font-size: 14px; font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: transform 160ms var(--ease-out), background 160ms var(--ease-out), border-color 160ms var(--ease-out), box-shadow 160ms var(--ease-out), color 160ms var(--ease-out);
  white-space: nowrap; cursor: pointer; letter-spacing: -0.01em;
}
.btn-primary {
  background: var(--text);
  color: #FFFFFF;
  box-shadow: 0 1px 0 rgba(255,255,255,0.12) inset, 0 8px 24px rgba(10,12,16,0.18);
}
.btn-primary:hover { background: #1B1F25; transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border-strong);
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-3); background: var(--bg-elev-1); }
.btn-amber, .btn-accent {
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: #FFFFFF;
  box-shadow: 0 1px 0 rgba(255,255,255,0.25) inset, 0 12px 28px rgba(27,162,160,0.30);
  border-color: rgba(0,0,0,0.04);
}
.btn-amber:hover, .btn-accent:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgba(255,255,255,0.25) inset, 0 16px 36px rgba(27,162,160,0.36); }
.btn-lg { padding: 14px 22px; font-size: 15px; }

.arrow-r::after { content: '→'; display: inline-block; transition: transform 200ms var(--ease-out); }
.arrow-r:hover::after { transform: translateX(3px); }

/* ───── Sections ───── */
section { padding: clamp(64px, 9vw, 120px) 0; position: relative; }
.section-hd { display: flex; flex-direction: column; gap: 16px; max-width: 720px; margin-bottom: 56px; }

/* ───── Cards ───── */
.card {
  background: linear-gradient(180deg, #FFFFFF 0%, var(--bg-elev-1) 100%);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 28px; position: relative; overflow: hidden;
  box-shadow: 0 1px 2px rgba(10,12,16,0.04);
}
.card-thin { background: #FFFFFF; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }

.hairline { height: 1px; width: 100%; background: linear-gradient(90deg, transparent, var(--border-strong), transparent); }

/* ───── Reveal-on-scroll ───── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }
.reveal-stagger > * { opacity: 0; transform: translateY(14px); transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out); }
.reveal-stagger.in > * { opacity: 1; transform: none; }
.reveal-stagger.in > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 400ms; }

/* ───── Footer ───── */
footer {
  border-top: 1px solid var(--border);
  padding: 56px 0 40px; margin-top: 80px;
  font-size: 13px; color: var(--text-3);
  position: relative; z-index: 1;
  background: var(--bg-elev-1);
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer-grid h5 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.12em; color: var(--text-3); font-family: var(--font-mono); margin-bottom: 14px; font-weight: 500; }
.footer-grid ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-grid a { color: var(--text-2); transition: color 160ms var(--ease-out); }
.footer-grid a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid var(--border); flex-wrap: wrap; gap: 16px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }

/* ───── Pill / chip ───── */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: #FFFFFF; border: 1px solid var(--border);
  font-size: 12px; color: var(--text-2);
  font-family: var(--font-mono); letter-spacing: 0.02em;
}
.chip-dot { width: 6px; height: 6px; border-radius: 999px; background: var(--accent); box-shadow: 0 0 10px var(--accent); }

/* ───── Utility ───── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-3.keep-2 { grid-template-columns: 1fr 1fr; }
}
.stack-sm { display: flex; flex-direction: column; gap: 10px; }
.stack { display: flex; flex-direction: column; gap: 16px; }
.stack-lg { display: flex; flex-direction: column; gap: 28px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.center { text-align: center; }
.tnum { font-variant-numeric: tabular-nums; }

/* Decorative subtle grid */
.bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(10,12,16,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10,12,16,0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 50% at 50% 30%, #000 30%, transparent 75%);
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; }
  .reveal, .reveal-stagger > * { opacity: 1 !important; transform: none !important; }
}