:root {
    --bg: #f4efe7;
    --bg-accent: #e4d3bb;
    --panel: rgba(255, 252, 247, 0.92);
    --line: #d4c3aa;
    --text: #2f2418;
    --muted: #74644f;
    --brand: #1f6f5f;
    --brand-dark: #174f45;
    --danger: #9f3a2b;
    --shadow: 0 24px 60px rgba(47, 36, 24, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Georgia, "Times New Roman", serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(255, 255, 255, 0.7), transparent 30%),
        linear-gradient(135deg, var(--bg) 0%, #efe4d4 52%, var(--bg-accent) 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(116, 100, 79, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(116, 100, 79, 0.03) 1px, transparent 1px);
    background-size: 28px 28px;
}

.auth-page,
.chat-shell {
    display: grid;
    place-items: center;
    padding: 24px;
}

.card,
.chat-panel {
    width: min(100%, 1080px);
    background: var(--panel);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(212, 195, 170, 0.8);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.card {
    max-width: 440px;
    padding: 32px;
}

.stack {
    display: grid;
    gap: 18px;
}

.eyebrow {
    margin: 0 0 8px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 0.78rem;
    color: var(--muted);
}

h1 {
    margin: 0;
    font-size: clamp(2rem, 4vw, 3rem);
}

.subtitle,
.helper {
    color: var(--muted);
}

label {
    display: grid;
    gap: 8px;
    font-weight: 700;
}

input,
textarea,
button,
.ghost-button {
    font: inherit;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.8);
    color: var(--text);
}

textarea {
    resize: vertical;
    min-height: 88px;
}

button,
.ghost-button {
    border: 0;
    border-radius: 999px;
    padding: 12px 18px;
    background: var(--brand);
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    transition: transform 0.16s ease, background 0.16s ease;
}

button:hover,
.ghost-button:hover {
    transform: translateY(-1px);
    background: var(--brand-dark);
}

.ghost-button {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--line);
}

.alert {
    margin: 18px 0;
    padding: 12px 14px;
    border-radius: 14px;
    background: rgba(159, 58, 43, 0.09);
    color: var(--danger);
}

.chat-shell {
    align-content: start;
    gap: 18px;
}

.chat-header {
    width: min(100%, 1080px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.chat-panel {
    padding: 20px;
}

.messages {
    height: min(60vh, 620px);
    overflow-y: auto;
    display: grid;
    gap: 14px;
    padding-right: 4px;
}

.message {
    max-width: min(100%, 720px);
    padding: 16px 18px;
    border-radius: 20px 20px 20px 8px;
    background: #fffaf3;
    border: 1px solid rgba(212, 195, 170, 0.8);
}

.message.mine {
    margin-left: auto;
    border-radius: 20px 20px 8px 20px;
    background: #eef7f3;
    border-color: rgba(31, 111, 95, 0.22);
}

.meta {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 0.92rem;
}

.message p,
.empty-state {
    margin: 0;
    line-height: 1.5;
    white-space: pre-wrap;
}

.composer {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(212, 195, 170, 0.7);
}

.composer-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-top: 12px;
}

@media (max-width: 720px) {
    .card,
    .chat-panel {
        padding: 18px;
        border-radius: 20px;
    }

    .chat-header,
    .composer-footer,
    .meta {
        display: grid;
    }
}