/* ════════════════════════════════════════════════════
   intro.css — the Act-0 "Lani Intro" overlay (spec-v2 §A)
   Values are the design prototype's (Lani Intro.dc.html). The intro is
   the entity's introduction — brand visuals, not a skinnable surface.
   System font stack (local-first, no webfonts).
   ════════════════════════════════════════════════════ */

.lani-intro {
    position: fixed;
    inset: 0;
    z-index: 960;
    background: radial-gradient(circle at 50% 40%, #0a0a14 0%, #040406 64%);
    color: #f4f4f6;
    opacity: 1;
    transition: opacity 600ms ease;
}
.lani-intro--out { opacity: 0; pointer-events: none; }
.lani-intro__scroll {
    position: absolute;
    inset: 0;
    overflow-y: auto;
    display: flex;
    align-items: safe center;
    justify-content: center;
    padding: 48px 24px;
}
.lani-intro__stage {
    width: 100%;
    max-width: 760px;
    opacity: 0;
    transform: translateY(12px);
}
.lani-intro__stage--in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 450ms ease, transform 450ms ease;
}
.lani-intro__exit {
    position: absolute;
    top: 18px;
    right: 22px;
    border: none;
    background: rgba(255, 255, 255, 0.06);
    color: #9ca3af;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
}

.lani-intro-step { text-align: center; }
.lani-intro-kicker {
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.16em;
    color: #5b9dff;
}
.lani-intro-title {
    margin: 10px 0 6px;
    font-size: 34px;
    font-weight: 600;
    letter-spacing: -0.02em;
}
.lani-intro-sub { margin: 0 0 30px; color: #9ca3af; font-size: 15px; }

/* ── Step 0: avatar cards + accent ── */
.lani-intro-avatars {
    display: flex;
    gap: 18px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 26px;
}
.lani-intro-avatar {
    position: relative;
    width: 204px;
    padding: 26px 18px 20px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    color: inherit;
    cursor: pointer;
    transition: background 200ms ease, box-shadow 200ms ease, border-color 200ms ease;
}
.lani-intro-avatar.active {
    background: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.45);
    box-shadow: 0 0 34px rgba(59, 130, 246, 0.18);
}
.lani-intro-avatar__halo {
    position: absolute;
    top: 8px;
    left: 50%;
    width: 110px;
    height: 110px;
    margin-left: -55px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--av-halo), transparent 70%);
    filter: blur(14px);
    opacity: 0.3;
    transition: opacity 250ms ease;
    pointer-events: none;
}
.lani-intro-avatar.active .lani-intro-avatar__halo { opacity: 0.85; }
.lani-intro-avatar__portrait {
    position: relative;
    display: block;
    width: 92px;
    height: 92px;
    margin: 0 auto 14px;
    border-radius: 50%;
    border: 2px solid var(--av-ring);
    background: radial-gradient(circle at 35% 30%, #8ab4ff, #3b82f6 45%, #9333ea 100%);
}
.lani-intro-avatar__name { display: block; font-size: 17px; font-weight: 600; }
.lani-intro-avatar__tags { display: block; margin: 7px 0 6px; }
.lani-intro-avatar__tags i {
    display: inline-block;
    margin: 0 3px;
    padding: 2px 9px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.06);
    color: #c4c4cc;
    font-size: 11px;
    font-style: normal;
}
.lani-intro-avatar__blurb { display: block; color: #7c818c; font-size: 12.5px; }

.lani-intro-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-bottom: 14px;
}
.lani-intro-row__label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #7c818c;
}
.lani-intro-row__note { color: #5b6472; font-size: 12px; margin-left: 8px; }
.lani-intro-seg {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px;
    border-radius: 11px;
    background: rgba(255, 255, 255, 0.05);
}
.lani-intro-seg button {
    border: none;
    background: transparent;
    color: #9ca3af;
    font-size: 13px;
    padding: 6px 13px;
    border-radius: 8px;
    cursor: pointer;
}
.lani-intro-seg button.active {
    background: rgba(59, 130, 246, 0.22);
    color: #fff;
}

/* ── Voice mode: early-access switch + honest disclaimer ── */
.lani-intro-switch {
    position: relative;
    width: 42px;
    height: 24px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
    cursor: pointer;
    transition: background 160ms ease, border-color 160ms ease;
}
.lani-intro-switch__knob {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #9ca3af;
    transition: transform 160ms ease, background 160ms ease;
}
.lani-intro-switch--on {
    background: rgba(59, 130, 246, 0.35);
    border-color: rgba(59, 130, 246, 0.6);
}
.lani-intro-switch--on .lani-intro-switch__knob {
    transform: translateX(18px);
    background: #fff;
}
.lani-intro-early {
    margin-left: 10px;
    font-size: 10.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: #e7c98a;
    border: 1px solid rgba(207, 146, 47, 0.4);
    border-radius: 6px;
    padding: 3px 7px;
    white-space: nowrap;
}
.lani-intro-voice-detail { margin: 10px 0 0; }
.lani-intro-voice-note {
    margin: 10px 0 0;
    max-width: 520px;
    font-size: 12.5px;
    line-height: 1.55;
    color: #8a8f9c;
}

.lani-intro-primary {
    margin-top: 16px;
    border: none;
    border-radius: 12px;
    padding: 13px 30px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(90deg, #3b82f6, #d946ef);
    cursor: pointer;
    box-shadow: 0 8px 26px rgba(59, 130, 246, 0.28);
}
.lani-intro-ghost {
    border: none;
    background: transparent;
    color: #7c818c;
    font-size: 13.5px;
    cursor: pointer;
    padding: 12px 16px;
}
.lani-intro-ghost:hover { color: #c4c4cc; }
.lani-intro-reassure { margin-top: 22px; color: #5b6472; font-size: 12.5px; }

/* ── Step 1: conversation ── */
.lani-intro-portrait {
    position: relative;
    width: 212px;
    height: 212px;
    margin: 0 auto 18px;
}
.lani-intro-portrait--sm { width: 128px; height: 128px; }
.lani-intro-portrait__face {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid var(--av-ring);
    background: radial-gradient(circle at 35% 30%, #8ab4ff, #3b82f6 45%, #9333ea 100%);
    box-shadow: 0 0 46px var(--av-halo);
}
.lani-intro-portrait__ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1px solid rgba(126, 176, 255, 0.45);
    animation: lani-intro-ring 2.6s ease-out infinite;
    pointer-events: none;
}
.lani-intro-portrait__ring--b { animation-delay: 1.3s; }
@keyframes lani-intro-ring {
    0%   { transform: scale(1);    opacity: 0.6; }
    100% { transform: scale(1.45); opacity: 0; }
}
.lani-intro-who {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}
.lani-intro-bars { display: inline-flex; gap: 3px; align-items: flex-end; height: 14px; }
.lani-intro-bars i {
    width: 3px;
    height: 6px;
    border-radius: 2px;
    background: #5b9dff;
    animation: lani-intro-bars 1s ease-in-out infinite;
}
.lani-intro-bars i:nth-child(2) { animation-delay: 0.15s; }
.lani-intro-bars i:nth-child(3) { animation-delay: 0.3s; }
.lani-intro-bars i:nth-child(4) { animation-delay: 0.45s; }
@keyframes lani-intro-bars {
    0%, 100% { height: 5px; opacity: 0.55; }
    50%      { height: 14px; opacity: 1; }
}
.lani-intro-line {
    max-width: 580px;
    margin: 0 auto 10px;
    font-size: 23px;
    line-height: 1.42;
    letter-spacing: -0.01em;
    text-wrap: pretty;
}
.lani-intro-line--sm { font-size: 18px; color: #c4c4cc; }
.lani-intro-counter { color: #5b6472; font-size: 12px; font-variant-numeric: tabular-nums; margin-bottom: 18px; }
.lani-intro-chips { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 8px; }
.lani-intro-chip {
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    color: #c4c4cc;
    font-size: 13px;
    padding: 8px 16px;
    cursor: pointer;
}
.lani-intro-chip:hover { border-color: rgba(59, 130, 246, 0.5); color: #fff; }

/* ── Step 2: brain ── */
.lani-intro-brain {
    position: relative;
    max-width: 580px;
    height: 312px;
    margin: 22px auto 8px;
}
.lani-intro-brain__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}
.lani-intro-brain__core {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 96px;
    height: 96px;
    margin: -48px 0 0 -48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6, #d946ef);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
    animation: lani-intro-core 2.8s ease-in-out infinite;
}
@keyframes lani-intro-core {
    0%, 100% { box-shadow: 0 0 30px rgba(59, 130, 246, 0.6); }
    50%      { box-shadow: 0 0 44px rgba(217, 70, 239, 0.5); }
}
.lani-intro-brain__node {
    position: absolute;
    transform: translate(-50%, -50%);
    padding: 9px 15px;
    border-radius: 12px;
    border: 1px solid color-mix(in srgb, var(--node-color) 60%, transparent);
    background: rgba(12, 12, 18, 0.9);
    box-shadow: 0 0 18px color-mix(in srgb, var(--node-color) 25%, transparent);
    font-size: 13px;
    font-weight: 600;
    color: var(--node-color);
}

/* ── Step 3: suggestion ── */
.lani-intro-card {
    display: flex;
    align-items: center;
    gap: 14px;
    max-width: 420px;
    margin: 20px auto;
    padding: 16px 18px;
    text-align: left;
    border: 1px solid rgba(47, 168, 109, 0.3);
    border-radius: 15px;
    background: rgba(47, 168, 109, 0.08);
}
.lani-intro-card__icon {
    flex: 0 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 11px;
    background: rgba(47, 168, 109, 0.15);
}
.lani-intro-card__text { font-size: 13.5px; color: #c4c4cc; line-height: 1.5; }
.lani-intro-card__text b { display: block; color: #fff; font-size: 15px; margin-bottom: 2px; }
.lani-intro-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

/* ── Reduced motion: everything settles static ── */
@media (prefers-reduced-motion: reduce) {
    .lani-intro,
    .lani-intro__stage--in { transition: none; }
    .lani-intro-portrait__ring,
    .lani-intro-bars i,
    .lani-intro-brain__core { animation: none; }
    .lani-intro-portrait__ring { opacity: 0.35; }
}

/* ── Narrow viewports: single-column avatar stack ── */
@media (max-width: 767px) {
    .lani-intro-title { font-size: 27px; }
    .lani-intro-line { font-size: 19px; }
    .lani-intro-avatar { width: min(300px, 84vw); }
    .lani-intro-brain { height: 260px; }
}