:root {
    --bg-0: #1a1014;
    --bg-1: #24161c;
    --bg-2: #312028;
    --rose: #e08a9b;
    --rose-deep: #c45c72;
    --ink: #f7eef1;
    --muted: #c9b0b8;
    --line: rgba(224, 138, 155, 0.28);
    --ok: #8fbf9f;
    --err: #e89a8c;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
    --radius: 18px;
    --font-display: "Fraunces", Georgia, serif;
    --font-body: "Outfit", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    color: var(--ink);
    font-family: var(--font-body);
    background:
        radial-gradient(1200px 600px at 10% -10%, rgba(196, 92, 114, 0.35), transparent 55%),
        radial-gradient(900px 500px at 100% 0%, rgba(120, 60, 80, 0.28), transparent 50%),
        linear-gradient(165deg, var(--bg-0), var(--bg-1) 45%, #150d11);
}

.ambient {
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    opacity: 0.5;
    animation: drift 18s ease-in-out infinite alternate;
}

@keyframes drift {
    from { transform: translate3d(0, 0, 0); }
    to { transform: translate3d(-1.5%, 1%, 0); }
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    position: sticky;
    top: 0;
    backdrop-filter: blur(10px);
    background: rgba(26, 16, 20, 0.72);
    border-bottom: 1px solid var(--line);
    z-index: 10;
}

.brand {
    font-family: var(--font-display);
    font-size: 1.35rem;
    color: var(--ink);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.85rem;
    align-items: center;
}

.nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.95rem;
}

.nav a:hover { color: var(--ink); }

.shell {
    width: min(920px, calc(100% - 1.5rem));
    margin: 1.25rem auto 3rem;
}

h1 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    margin: 0 0 0.5rem;
}

.lede { color: var(--muted); max-width: 38rem; line-height: 1.5; }
.eyebrow { color: var(--rose); text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.75rem; margin: 0 0 0.5rem; }
.muted { color: var(--muted); }

.hero-home, .panel, .auth-panel, .chat {
    background: linear-gradient(180deg, rgba(49, 32, 40, 0.92), rgba(36, 22, 28, 0.95));
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    animation: rise 0.55s ease both;
}

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

.cta-row, .chat-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.btn {
    appearance: none;
    border: 0;
    border-radius: 999px;
    padding: 0.75rem 1.2rem;
    background: linear-gradient(135deg, var(--rose), var(--rose-deep));
    color: #1a1014;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.18s ease, filter 0.18s ease;
}

.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
}
.btn-small { padding: 0.5rem 0.9rem; font-size: 0.9rem; }

.stack { display: grid; gap: 0.9rem; }
label { display: grid; gap: 0.35rem; color: var(--muted); font-size: 0.92rem; }
input, textarea, select {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: rgba(20, 12, 16, 0.7);
    color: var(--ink);
    padding: 0.7rem 0.85rem;
    font: inherit;
}

.flash {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.25);
}
.flash-success { border-color: rgba(143, 191, 159, 0.5); color: var(--ok); }
.flash-error { border-color: rgba(232, 154, 140, 0.5); color: var(--err); }

.meta { display: grid; grid-template-columns: 8rem 1fr; gap: 0.4rem 1rem; }
.meta dt { color: var(--muted); }
.invite-link {
    display: block;
    overflow-wrap: anywhere;
    padding: 0.85rem;
    background: rgba(0, 0, 0, 0.28);
    border-radius: 12px;
}

.chat { padding: 1rem; min-height: 70vh; display: grid; grid-template-rows: auto 1fr auto auto auto; gap: 0.75rem; }
.chat-header { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-start; }
.bubbles {
    overflow: auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.5rem 0.25rem;
    min-height: 40vh;
}
.bubble {
    max-width: min(92%, 34rem);
    padding: 0.8rem 1rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--line);
    animation: pop 0.28s ease both;
}
@keyframes pop {
    from { opacity: 0; transform: translateY(6px) scale(0.98); }
    to { opacity: 1; transform: none; }
}
.bubble-user { align-self: flex-end; background: rgba(196, 92, 114, 0.22); }
.bubble-ai { align-self: flex-start; }
.bubble-meta { display: block; font-size: 0.72rem; color: var(--muted); margin-bottom: 0.25rem; }
.bubble p { margin: 0; line-height: 1.45; white-space: pre-wrap; }
.choice-list { margin: 0.5rem 0 0; padding-left: 1.1rem; color: var(--muted); }
.composer { display: grid; grid-template-columns: 1fr auto; gap: 0.6rem; align-items: end; }
.thinking { color: var(--rose); font-size: 0.9rem; }
.consent-bar { display: flex; justify-content: flex-end; }
.boundary-list { list-style: none; padding: 0; display: grid; gap: 0.5rem; }
.boundary-list li {
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(0, 0, 0, 0.2);
}

@media (max-width: 640px) {
    .topbar { padding: 0.85rem 1rem; }
    .composer { grid-template-columns: 1fr; }
    .chat-header { flex-direction: column; }
}