/* ─── index.css ─────────────────────────────────────────────────────────────
   Landing page styles. Requires css/shared.css loaded first.
   ─────────────────────────────────────────────────────────────────────────── */

html { scroll-behavior: smooth; }
body { overflow-x: hidden; }

/* ─── Layout wrapper ─── */
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* ─── Nav ─── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(10,14,15,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 18px 32px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-links { display: flex; gap: 32px; font-size: 14px; color: var(--dim); }
.nav-links a:hover { color: var(--teal); }
.nav-cta {
  border: 1px solid var(--teal); color: var(--teal);
  padding: 8px 18px; border-radius: 3px; font-size: 13px; font-family: var(--mono);
  transition: background .2s, color .2s;
}
.nav-cta:hover { background: var(--teal); color: var(--bg); }
@media (max-width: 760px) { .nav-links { display: none; } }

/* ─── Hero ─── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  padding-top: 90px;
  overflow: hidden;
}
#lattice-canvas {
  position: fixed; top: 0; left: 0; width: 100vw; height: 100vh;
  z-index: 0; opacity: 0.9;
}
.hero-fade {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse 60% 50% at 30% 50%,
    rgba(10,14,15,0.92) 0%, rgba(10,14,15,0.55) 45%, rgba(10,14,15,0.15) 75%);
}
.hero-content { position: relative; z-index: 2; max-width: 600px; }

.eyebrow {
  font-family: var(--mono); font-size: 12.5px; color: var(--teal);
  letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.eyebrow::before { content: ''; width: 24px; height: 1px; background: var(--teal); }

h1 {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(2.6rem, 5.2vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  margin-bottom: 24px;
  font-variation-settings: 'opsz' 70;
}
h1 em { font-style: italic; color: var(--teal); font-weight: 300; }

.hero-sub {
  font-size: 17px; color: var(--dim); max-width: 480px;
  margin-bottom: 36px; line-height: 1.6;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 48px; }

.live-readout {
  font-family: var(--mono); font-size: 12.5px; color: var(--dimmer);
  display: flex; align-items: center; gap: 18px;
}
.live-readout .stat { color: var(--text); }
.live-readout .stat strong { color: var(--teal); font-weight: 500; }
.pulse-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--teal);
  animation: pulse 1.6s infinite;
}

/* ACP envelope panel */
.envelope-panel {
  position: absolute; right: 6%; top: 50%; transform: translateY(-50%);
  width: 280px; background: rgba(18,24,26,0.82); border: 1px solid var(--line);
  border-radius: 6px; padding: 16px; font-family: var(--mono); font-size: 11px;
  color: var(--dim); z-index: 2; backdrop-filter: blur(6px);
  box-shadow: 0 0 40px rgba(56,189,248,0.08);
}
.envelope-panel .ep-head {
  display: flex; justify-content: space-between; color: var(--dimmer);
  margin-bottom: 10px; letter-spacing: 0.05em; text-transform: uppercase; font-size: 10px;
}
.envelope-panel pre { white-space: pre-wrap; line-height: 1.6; color: var(--text); opacity: 0.9; }
.envelope-panel .k { color: var(--teal); }
.envelope-panel .v { color: var(--amber); }
@media (max-width: 980px) { .envelope-panel { display: none; } }

/* ─── Problem strip ─── */
.strip {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  background: rgba(18,24,26,0.55); backdrop-filter: blur(8px); padding: 56px 0;
}
.strip-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 32px; }
@media (max-width: 900px) { .strip-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 560px) { .strip-grid { grid-template-columns: 1fr; } }
.strip-item .num { font-family: var(--mono); font-size: 12px; color: var(--teal); margin-bottom: 10px; }
.strip-item p { font-size: 14.5px; color: var(--dim); line-height: 1.6; }

/* ─── Sections ─── */
.section { padding: 110px 0; }
.section-head { max-width: 620px; margin-bottom: 64px; }
.section-eyebrow {
  font-family: var(--mono); font-size: 12px; color: var(--teal);
  letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 16px;
}
.section h2 {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(1.9rem, 3.4vw, 2.6rem); line-height: 1.15; margin-bottom: 18px;
}
.section-sub { color: var(--dim); font-size: 16px; line-height: 1.65; max-width: 540px; }

/* ─── Module cards ─── */
.modules-grid {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 1px; background: var(--line); border: 1px solid var(--line);
}
@media (max-width: 900px) { .modules-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px) { .modules-grid { grid-template-columns: 1fr; } }

.module-card {
  background: rgba(10,14,15,0.65); backdrop-filter: blur(8px);
  padding: 32px 28px; transition: background .2s;
}
.module-card:hover { background: rgba(18,24,26,0.78); }
.module-card .m-cat {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.08em;
  text-transform: uppercase; margin-bottom: 18px; display: inline-block;
  padding: 3px 9px; border-radius: 2px;
}
.m-cat.usability  { color: var(--teal);      background: rgba(56,189,248,0.1); }
.m-cat.protocol   { color: var(--amber);     background: rgba(212,168,67,0.08); }
.m-cat.trust      { color: var(--verified);  background: rgba(232,179,57,0.1); }
.module-card h3 {
  font-family: var(--display); font-weight: 500;
  font-size: 1.25rem; margin-bottom: 10px;
}
.module-card p { font-size: 14px; color: var(--dim); line-height: 1.6; }

/* ─── Waitlist ─── */
.waitlist { padding: 120px 0; text-align: center; }
.waitlist h2 {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(2rem, 4vw, 3rem);
  max-width: 600px; margin: 0 auto 18px; line-height: 1.15;
}
.waitlist p { color: var(--dim); max-width: 480px; margin: 0 auto 40px; font-size: 16px; }
.waitlist-form {
  display: flex; gap: 10px; max-width: 440px;
  margin: 0 auto; flex-wrap: wrap; justify-content: center;
}
.waitlist-form input {
  flex: 1; min-width: 220px;
  background: rgba(18,24,26,0.65); backdrop-filter: blur(6px);
}

/* ─── Footer ─── */
footer {
  border-top: 1px solid var(--line); padding: 40px 0;
  background: rgba(10,14,15,0.65); backdrop-filter: blur(8px);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px; position: relative; z-index: 2;
}
footer .f-left { font-family: var(--mono); font-size: 12.5px; color: var(--dimmer); }
footer .f-right { display: flex; gap: 24px; font-size: 13px; color: var(--dim); }

/* ─── 3-module grid ─── */
.modules-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .modules-grid-3 { grid-template-columns: 1fr; } }

.module-card-3 {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 32px 28px 28px;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: border-color .2s;
}
.module-card-3:hover { border-color: rgba(56,189,248,0.3); }

.m3-step {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--dimmer);
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}
.module-card-3 h3 {
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.3rem;
  margin: 10px 0 12px;
  font-variation-settings: 'opsz' 40;
}
.module-card-3 p {
  font-size: 14px;
  color: var(--dim);
  line-height: 1.65;
  margin-bottom: 20px;
  flex: 1;
}
.m3-features {
  list-style: none;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.m3-features li {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--dim);
  display: flex;
  align-items: center;
  gap: 8px;
}
.m3-features li::before {
  content: '';
  width: 4px; height: 4px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
}

/* ─── ACP Protocol section ─── */
.section-alt {
  background: rgba(18,24,26,0.55);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.acp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
@media (max-width: 760px) { .acp-grid { grid-template-columns: 1fr; } }
.acp-field {
  background: var(--surface);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.acp-key {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--teal);
}
.acp-desc {
  font-size: 13px;
  color: var(--dim);
}