/* Eco — landing. Identidade: paleta B, Space Grotesk (display) + Inter (UI). */
:root {
  --bg: #0D1017;
  --rail: #12151C;
  --surf: #171B24;
  --surf2: #1D222D;
  --bd: #2A3546;
  --txt: #E9EDF2;
  --mut: #97A2B0;
  --acc: #14B8A6;
  --acc-press: #0D9488;
  --online: #34D399;
  --err: #F87171;
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-ui: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--txt);
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

h1, h2, h3 { font-family: var(--font-display); font-weight: 700; line-height: 1.15; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); letter-spacing: -0.01em; }
h3 { font-size: 1.05rem; color: var(--txt); }

a { color: var(--acc); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible { outline: 2px solid var(--acc); outline-offset: 2px; border-radius: 4px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--bd);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; color: var(--txt);
}
.brand:hover { text-decoration: none; }
.logo { width: 28px; height: 28px; flex: none; }
.nav-links { display: flex; gap: 22px; margin-left: auto; }
.nav-links a { color: var(--mut); font-size: 0.92rem; font-weight: 500; transition: color 150ms ease; }
.nav-links a:hover { color: var(--txt); text-decoration: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-ui); font-weight: 600; font-size: 0.95rem;
  border-radius: 10px; padding: 12px 22px;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 200ms ease, border-color 200ms ease, transform 150ms ease;
}
.btn-sm { padding: 8px 16px; font-size: 0.88rem; }
.btn-primary { background: var(--acc); color: var(--bg); }
.btn-primary:hover { background: var(--acc-press); text-decoration: none; }
.btn-ghost { background: transparent; color: var(--txt); border-color: var(--bd); }
.btn-ghost:hover { border-color: var(--mut); text-decoration: none; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 64px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 48px; align-items: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.82rem; font-weight: 500; color: var(--mut);
  background: var(--surf); border: 1px solid var(--bd);
  border-radius: 999px; padding: 6px 14px; margin-bottom: 20px;
}
.badge-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--online); }
.lead { color: var(--mut); font-size: 1.08rem; margin-top: 18px; max-width: 34em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 8px 22px; list-style: none; margin-top: 26px; color: var(--mut); font-size: 0.88rem; }
.hero-meta li { display: flex; align-items: center; gap: 8px; }
.hero-meta li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--acc); }

/* ---------- App mockup ---------- */
.hero-mock {
  display: grid;
  grid-template-columns: 44px 130px 1fr 120px;
  min-height: 320px;
  border: 1px solid var(--bd);
  border-radius: 14px;
  overflow: hidden;
  background: var(--bg);
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.8);
}
.mock-rail { background: var(--rail); display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 12px 0; }
.rail-pill { width: 26px; height: 26px; border-radius: 9px; background: var(--surf2); border: 1px solid var(--bd); }
.rail-pill.active { background: var(--acc); border-color: var(--acc); }
.mock-side { background: var(--surf); border-right: 1px solid var(--bd); padding: 12px 10px; font-size: 0.72rem; }
.side-head { font-weight: 600; color: var(--txt); padding: 2px 4px 10px; }
.side-cat { color: var(--mut); text-transform: uppercase; font-size: 0.62rem; letter-spacing: 0.08em; margin: 10px 4px 4px; }
.side-chan { color: var(--mut); padding: 4px 6px; border-radius: 6px; }
.side-chan.active { color: var(--txt); background: var(--surf2); }
.side-voice { display: flex; align-items: center; gap: 6px; color: var(--acc); }
.voice-wave svg { width: 14px; height: 14px; }
.mock-chat { background: var(--bg); display: flex; flex-direction: column; }
.chat-head { font-size: 0.78rem; font-weight: 600; color: var(--txt); padding: 10px 14px; border-bottom: 1px solid var(--bd); }
.msg { display: flex; gap: 10px; padding: 9px 14px; }
.msg-who { font-size: 0.72rem; font-weight: 600; color: var(--txt); }
.msg-who time { color: var(--mut); font-weight: 400; margin-left: 6px; }
.msg-text { font-size: 0.74rem; color: var(--mut); max-width: 42em; }
.avatar {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  background: var(--av, var(--surf2)); color: var(--bg);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700;
}
.avatar-bot { background: var(--surf2); color: var(--acc); border: 1px solid var(--acc); }
.avatar-xs { width: 18px; height: 18px; font-size: 0.6rem; }
.tag-bot {
  font-size: 0.55rem; font-weight: 700; color: var(--acc);
  border: 1px solid var(--acc); border-radius: 4px; padding: 0 4px; margin-right: 5px;
  vertical-align: 1px;
}
.reaction {
  display: inline-flex; margin-top: 5px; font-size: 0.62rem; color: var(--mut);
  background: var(--surf); border: 1px solid var(--bd); border-radius: 999px; padding: 2px 8px;
}
.chat-input { margin: auto 14px 12px; height: 28px; border: 1px solid var(--bd); border-radius: 8px; background: var(--surf); }
.mock-members { background: var(--surf); border-left: 1px solid var(--bd); padding: 12px 10px; font-size: 0.72rem; }
.mem-head { color: var(--mut); text-transform: uppercase; font-size: 0.6rem; letter-spacing: 0.08em; margin-bottom: 10px; }
.mem { display: flex; align-items: center; gap: 7px; color: var(--txt); padding: 4px 0; }

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--rail); border-block: 1px solid var(--bd); }
.section-lead { color: var(--mut); margin-top: 12px; font-size: 1.02rem; }

.feature-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px;
}
.card {
  background: var(--surf); border: 1px solid var(--bd); border-radius: 14px;
  padding: 26px 24px;
  transition: border-color 200ms ease, transform 200ms ease;
}
.card:hover { border-color: var(--acc); transform: translateY(-3px); }
.card h3 { margin: 16px 0 8px; }
.card p { color: var(--mut); font-size: 0.92rem; }
.icon { width: 30px; height: 30px; color: var(--acc); }
.soon {
  font-family: var(--font-ui); font-size: 0.62rem; font-weight: 600; color: var(--online);
  border: 1px solid var(--online); border-radius: 999px; padding: 1px 8px; vertical-align: 2px;
}

/* ---------- Prévia (shots) ---------- */
.shot-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 18px; margin-top: 44px; }
.shot {
  border: 1px solid var(--bd); border-radius: 14px;
  background: var(--rail);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.shot-body { flex: 1; padding: 0 16px 16px; background: var(--bg); }
.shot-body .chat-head { margin: 0 -16px 8px; padding: 10px 16px; border-bottom: 1px solid var(--bd); }
.shot-body .msg { padding: 10px 0; }
.shot-body-side { background: var(--surf); font-size: 0.8rem; padding: 16px; }
.shot-body-side .side-head { padding: 2px 0 10px; }
.media-thumb {
  display: block; margin-top: 8px; width: 100%; max-width: 320px; height: 92px;
  border-radius: 10px; border: 1px solid var(--bd);
  background:
    radial-gradient(circle at 78% 30%, color-mix(in srgb, var(--acc) 40%, transparent) 0%, transparent 55%),
    linear-gradient(135deg, var(--surf2), var(--surf));
  position: relative;
}
.media-thumb::after {
  content: ""; position: absolute; inset: 0; margin: auto; width: 34px; height: 34px; border-radius: 50%;
  border: 2px solid rgba(233, 237, 242, .85); border-left-color: transparent; border-bottom-color: transparent;
  transform: rotate(45deg);
}
.reaction-row { display: flex; gap: 6px; margin-top: 6px; }
.thread-chip {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 6px;
  font-size: 0.68rem; color: var(--acc);
  background: color-mix(in srgb, var(--acc) 10%, var(--surf));
  border: 1px solid var(--bd); border-radius: 999px; padding: 3px 10px;
}
.voice-avatars { display: flex; align-items: center; margin: 6px 0 2px; }
.voice-avatars .avatar { margin-right: -6px; border: 2px solid var(--surf); }
.voice-more { font-size: 0.62rem; color: var(--mut); margin-left: 10px; }
.shot-presence { margin-top: 14px; display: flex; flex-direction: column; gap: 6px; }
.pres { display: flex; align-items: center; gap: 8px; color: var(--txt); font-size: 0.78rem; }
.pres::before { content: ""; width: 8px; height: 8px; border-radius: 50%; }
.pres-online::before { background: var(--online); }
.pres-idle::before { background: #FBBF24; }
.pres-off { color: var(--mut); }
.pres-off::before { background: var(--bd); }
.shot figcaption {
  width: 100%; padding: 12px 16px; font-size: 0.85rem; color: var(--mut);
  background: var(--rail);
}

/* ---------- Privacidade ---------- */
.privacy { padding: 72px 0; }
.privacy-inner { display: flex; align-items: center; gap: 36px; }
.privacy-icon { width: 84px; height: 84px; flex: none; color: var(--acc); }
.privacy h2 { margin-bottom: 10px; }
.privacy p { color: var(--mut); max-width: 46em; }

/* ---------- Download ---------- */
.dl-cards { display: grid; grid-template-columns: 1.1fr 1fr; gap: 18px; margin-top: 44px; }
.dl-card {
  background: var(--surf); border: 1px solid var(--bd); border-radius: 14px;
  padding: 28px 26px; display: flex; flex-direction: column; align-items: flex-start; gap: 12px;
}
.dl-card h3 { font-size: 1.2rem; }
.dl-card p { color: var(--mut); font-size: 0.92rem; }
.dl-card .btn { margin-top: 4px; }
.dl-note { font-size: 0.8rem !important; color: var(--mut); }

/* ---------- FAQ ---------- */
.faq-inner { max-width: 760px; }
.faq-inner h2 { margin-bottom: 28px; }
details {
  border: 1px solid var(--bd); border-radius: 12px;
  background: var(--surf); padding: 18px 22px; margin-bottom: 12px;
}
summary {
  cursor: pointer; font-weight: 600; font-size: 1rem; color: var(--txt);
  list-style: none; display: flex; align-items: center; justify-content: space-between;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+"; color: var(--acc); font-size: 1.3rem; font-weight: 500;
  transition: transform 200ms ease;
}
details[open] summary::after { transform: rotate(45deg); }
details p { color: var(--mut); margin-top: 12px; font-size: 0.95rem; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--bd); background: var(--rail); padding: 44px 0 36px; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 28px; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-name { font-family: var(--font-display); font-weight: 700; }
.footer-tag { color: var(--mut); font-size: 0.85rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; margin-left: auto; }
.footer-links a { color: var(--mut); font-size: 0.9rem; }
.footer-links a:hover { color: var(--txt); }
.footer-copy { width: 100%; margin-top: 20px; color: var(--mut); font-size: 0.82rem; border-top: 1px solid var(--bd); padding-top: 20px; }

/* ---------- Responsivo ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-mock { grid-template-columns: 40px 110px 1fr; }
  .mock-members { display: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .shot-grid, .dl-cards { grid-template-columns: 1fr; }
  .privacy-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero { padding: 48px 0 40px; }
  .section { padding: 64px 0; }
  .mock-side { display: none; }
  .hero-mock { grid-template-columns: 40px 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  html { scroll-behavior: auto; }
}