:root {
    --rme-bg: #050b12;
    --rme-bg-deep: #02060a;
    --rme-surface: rgba(255, 255, 255, 0.03);
    --rme-surface-strong: rgba(255, 255, 255, 0.07);
    --rme-border: rgba(0, 183, 255, 0.15);
    --rme-border-strong: rgba(0, 183, 255, 0.5);
    --rme-text: #ffffff;
    --rme-text-soft: #d8d8d8;
    --rme-text-muted: #bfbfbf;
    --rme-accent: #00b7ff;
    --rme-accent-hover: #008fd6;
    --rme-radius: 20px;
    --rme-control-radius: 18px;
    --rme-font: Arial, Helvetica, sans-serif;
    font-family: var(--rme-font);
    color: var(--rme-text);
    background: var(--rme-bg);
    color-scheme: dark;
}

* { box-sizing: border-box; }

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    background:
        radial-gradient(circle at 50% 0, rgba(0, 183, 255, 0.08), transparent 42%),
        var(--rme-bg);
}

body {
    min-height: 100dvh;
    color: var(--rme-text);
    font-family: var(--rme-font);
    line-height: 1.6;
}

.public-shell {
    width: min(1180px, 100%);
    height: 100dvh;
    min-height: 420px;
    margin: 0 auto;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    position: relative;
    overflow: hidden;
    background: var(--rme-surface);
    border-inline: 1px solid var(--rme-border);
    box-shadow: 0 0 40px rgba(0, 183, 255, 0.08);
}

.public-shell[data-mode="embed"] {
    width: 100%;
    border: 0;
    box-shadow: none;
    grid-template-rows: minmax(0, 1fr) auto;
}

.public-shell[data-mode="embed"] > header {
    display: none;
}

header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    min-height: 94px;
    padding: 18px 30px;
    background: rgba(2, 6, 10, 0.92);
    border-bottom: 1px solid var(--rme-border);
}

h1 {
    margin: 2px 0 0;
    color: var(--rme-text);
    font-size: clamp(1.3rem, 3vw, 2rem);
    line-height: 1.15;
    text-shadow: 0 0 12px rgba(0, 183, 255, 0.25);
}

.eyebrow {
    display: block;
    color: var(--rme-accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.status {
    color: var(--rme-accent);
    padding: 6px 12px;
    border: 1px solid var(--rme-border-strong);
    border-radius: 999px;
    background: rgba(0, 183, 255, 0.08);
    font-size: 0.8rem;
    font-weight: 700;
}

.messages {
    min-height: 1px;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-color: var(--rme-accent-hover) var(--rme-bg-deep);
    padding: clamp(18px, 3vw, 34px);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.welcome {
    width: min(520px, 100%);
    margin: auto;
    padding: clamp(24px, 5vw, 42px);
    display: grid;
    gap: 9px;
    text-align: center;
    color: var(--rme-text-soft);
    background: var(--rme-surface);
    border: 1px solid var(--rme-border);
    border-radius: var(--rme-radius);
    box-shadow: 0 0 25px rgba(0, 183, 255, 0.08);
}

.welcome strong {
    color: var(--rme-accent);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.message {
    max-width: min(76%, 620px);
    padding: 12px 15px;
    border: 1px solid var(--rme-border);
    border-radius: var(--rme-control-radius);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    line-height: 1.5;
}

.message.INTERLOCUTOR {
    align-self: flex-end;
    color: var(--rme-bg-deep);
    background: var(--rme-accent);
    border-color: var(--rme-accent);
    border-bottom-right-radius: 5px;
}

.message.ARMEIA,
.message.HUMAN_OPERATOR {
    align-self: flex-start;
    color: var(--rme-text);
    background: var(--rme-surface-strong);
    border-bottom-left-radius: 5px;
}

.author {
    display: block;
    margin-bottom: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    opacity: 0.75;
}

form {
    padding: 16px clamp(14px, 3vw, 28px) max(16px, env(safe-area-inset-bottom));
    background: rgba(2, 6, 10, 0.94);
    border-top: 1px solid var(--rme-border);
}

label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.compose-row {
    display: flex;
    gap: 12px;
    align-items: end;
}

textarea {
    width: 100%;
    min-height: 50px;
    max-height: 140px;
    resize: none;
    padding: 12px 16px;
    color: var(--rme-text);
    background: var(--rme-surface-strong);
    border: 1px solid var(--rme-border-strong);
    border-radius: var(--rme-control-radius);
    font: inherit;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
}

textarea::placeholder { color: var(--rme-text-muted); }

textarea:hover { border-color: var(--rme-accent); }

textarea:focus-visible {
    border-color: var(--rme-accent);
    box-shadow: 0 0 0 3px rgba(0, 183, 255, 0.2);
}

button {
    min-width: 92px;
    min-height: 50px;
    padding: 12px 22px;
    border: 0;
    border-radius: var(--rme-control-radius);
    color: var(--rme-text);
    background: var(--rme-accent);
    font: 700 0.95rem/1 var(--rme-font);
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
}

button:hover:not(:disabled) {
    background: var(--rme-accent-hover);
    transform: translateY(-2px);
}

button:focus-visible {
    outline: 3px solid var(--rme-text);
    outline-offset: 3px;
}

button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

#feedback {
    min-height: 1em;
    margin: 6px 2px 0;
    color: var(--rme-text-muted);
    font-size: 0.78rem;
}

.new-messages {
    position: absolute;
    bottom: 98px;
    left: 50%;
    min-height: 42px;
    padding: 8px 15px;
    transform: translateX(-50%);
    box-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
}

@media (max-width: 600px) {
    header {
        min-height: 78px;
        padding: 12px 14px;
    }

    .messages { padding: 14px; }
    .welcome { padding: 24px 18px; }
    .message { max-width: 88%; }
    form { padding: 10px max(10px, env(safe-area-inset-right)) max(10px, env(safe-area-inset-bottom)) max(10px, env(safe-area-inset-left)); }
    .compose-row { gap: 8px; }
    button { min-width: 74px; padding-inline: 14px; }
    .public-shell { min-height: 320px; }
}

@media (max-height: 520px) {
    .welcome { padding: 16px; }
    .messages { padding-block: 10px; }
    header { min-height: 70px; padding-block: 8px; }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}