:root {
  --ink: #0f1c1a;
  --mist: #d7e4df;
  --fog: #eef4f1;
  --teal: #1a6b5c;
  --teal-deep: #0e4339;
  --warn: #8a3b2b;
  --ok: #1f6b3a;
  --radius: 14px;
  --font-display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --font-body: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--fog);
  line-height: 1.45;
}

.atmosphere {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(1200px 600px at 10% -10%, #b9d2c8 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #c5d8e6 0%, transparent 50%),
    linear-gradient(165deg, #e8f0ec 0%, #f3f1ea 45%, #dfe8e3 100%);
}

.top {
  display: flex; align-items: center; gap: 1rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  backdrop-filter: blur(8px);
  background: color-mix(in srgb, white 55%, transparent);
  position: sticky; top: 0; z-index: 10;
}
.brand, .brand-hero, .brand-inline {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--teal-deep);
  text-decoration: none;
}
.brand { font-size: 1.35rem; }
.brand-hero {
  font-size: clamp(2.8rem, 8vw, 4.5rem);
  margin: 0 0 0.35rem;
  line-height: 1;
  animation: rise 0.7s ease-out both;
}
.brand-inline { font-size: 1.1rem; margin: 0 0 0.5rem; }
nav { display: flex; flex-wrap: wrap; gap: 0.35rem 0.9rem; flex: 1; }
nav a {
  color: var(--ink); text-decoration: none; font-size: 0.95rem;
  opacity: 0.75; border-bottom: 2px solid transparent; padding-bottom: 0.1rem;
}
nav a[aria-current="page"] { opacity: 1; border-color: var(--teal); }
.logout { margin-left: auto; }
.logout button {
  border: 0; background: transparent; cursor: pointer;
  font: inherit; opacity: 0.7;
}

main { max-width: 920px; margin: 0 auto; padding: 1.5rem 1.25rem 4rem; }

.hero, .hero-login, .section, .chat-wrap {
  animation: rise 0.55s ease-out both;
}
.hero h1, .section h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  margin: 0.2rem 0 0.6rem;
}
.lead { font-size: 1.05rem; max-width: 36rem; opacity: 0.85; }
.muted { opacity: 0.65; font-size: 0.92rem; }
.status-line { margin-top: 1.5rem; font-size: 0.9rem; opacity: 0.7; }

.cta { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.7rem 1.1rem; border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  background: color-mix(in srgb, white 70%, transparent);
  color: var(--ink); text-decoration: none; font: inherit; cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary {
  background: var(--teal); color: #f4faf8; border-color: var(--teal-deep);
}

.login-form, .chat-form {
  display: grid; gap: 0.75rem; margin-top: 1.5rem; max-width: 24rem;
}
.login-form label, .chat-form label { display: grid; gap: 0.35rem; font-size: 0.9rem; }
.login-form input, .chat-form textarea, .chat-form input {
  font: inherit; padding: 0.7rem 0.85rem; border-radius: 10px;
  border: 1px solid color-mix(in srgb, var(--ink) 18%, transparent);
  background: color-mix(in srgb, white 80%, transparent);
}
.login-form button, .chat-form button {
  font: inherit; padding: 0.75rem 1rem; border: 0; border-radius: 999px;
  background: var(--teal); color: #f4faf8; cursor: pointer;
}
.check { display: flex !important; flex-direction: row !important; align-items: center; gap: 0.5rem; }
.err { color: var(--warn); }

.chat-log {
  min-height: 42vh; max-height: 58vh; overflow: auto;
  padding: 1rem; margin: 1rem 0;
  border-radius: var(--radius);
  background: color-mix(in srgb, white 55%, transparent);
  border: 1px solid color-mix(in srgb, var(--ink) 10%, transparent);
}
.bubble { margin: 0 0 0.85rem; max-width: 92%; }
.bubble.user { margin-left: auto; text-align: right; }
.bubble .who { font-size: 0.75rem; opacity: 0.55; margin-bottom: 0.2rem; }
.bubble .text {
  display: inline-block; text-align: left; padding: 0.65rem 0.85rem;
  border-radius: 12px; background: #fff; white-space: pre-wrap;
}
.bubble.user .text { background: color-mix(in srgb, var(--teal) 18%, white); }
.chat-form { max-width: none; grid-template-columns: 1fr auto; align-items: end; }
.voice-bar {
  display: flex; align-items: center; gap: 0.75rem;
  margin: 0.5rem 0 0.75rem;
}
.voice-bar .btn { padding: 0.45rem 0.9rem; }

.device-list { list-style: none; padding: 0; margin: 1rem 0 0; display: grid; gap: 0.55rem; }
.device-list li {
  display: flex; gap: 0.75rem; align-items: center; justify-content: space-between;
  padding: 0.75rem 0.9rem; border-radius: 12px;
  background: color-mix(in srgb, white 65%, transparent);
  border: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
}
.device-list .meta { opacity: 0.65; font-size: 0.85rem; }
.device-list button {
  font: inherit; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--ink) 15%, transparent);
  background: white; padding: 0.4rem 0.8rem; cursor: pointer;
}

.link-list { list-style: none; padding: 0; }
.link-list li { padding: 0.55rem 0; border-bottom: 1px solid color-mix(in srgb, var(--ink) 8%, transparent); }
.link-list a { color: var(--teal-deep); }

.h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin: 1.75rem 0 0.6rem;
}
.member-list, .steps { list-style: none; padding: 0; margin: 1rem 0; }
.member-list li, .steps li {
  padding: 0.65rem 0.85rem; margin-bottom: 0.4rem;
  border-radius: 10px;
  background: color-mix(in srgb, white 60%, transparent);
  border: 1px solid color-mix(in srgb, var(--ink) 8%, transparent);
}
.member-list .meta { display: block; opacity: 0.6; font-size: 0.85rem; }
.steps li.current { border-color: var(--teal); }
.steps li.done { opacity: 0.55; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

@media (max-width: 640px) {
  .top { flex-wrap: wrap; }
  .logout { margin-left: 0; width: 100%; }
  .chat-form { grid-template-columns: 1fr; }
}