:root {
    --bg: #0f1220;
    --bg-panel: #171b2e;
    --bg-panel-2: #1e2338;
    --border: #2a3050;
    --text: #e7e9f5;
    --text-dim: #9aa0c0;
    --accent: #6c8bff;
    --accent-hover: #8aa2ff;
    --danger: #ff6b6b;
    --radius: 10px;
    font-size: 16px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
}
.site-header .brand { font-size: 1.3rem; font-weight: 700; color: var(--text); }
.site-header nav a { margin-left: 16px; color: var(--text-dim); }

.site-main {
    flex: 1;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 24px;
}

.site-footer {
    text-align: center;
    padding: 16px;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.hero { text-align: center; margin-bottom: 28px; }
.hero h1 { margin-bottom: 6px; }
.hero p { color: var(--text-dim); }
.you-are { margin-top: 10px; }

.room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.room-card {
    display: block;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    color: var(--text);
    transition: border-color .15s, transform .1s;
}
.room-card:hover {
    border-color: var(--accent);
    text-decoration: none;
    transform: translateY(-2px);
}
.room-card-top {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 6px;
}
.room-name { font-weight: 600; font-size: 1.05rem; }
.room-count { font-size: 0.75rem; color: var(--text-dim); }
.room-desc { color: var(--text-dim); font-size: 0.9rem; margin: 0; }

.card {
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    max-width: 420px;
    margin: 40px auto;
}
.nickname-card form { display: flex; flex-direction: column; gap: 10px; margin-top: 12px; }
.nickname-card input[type=text] {
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
}
.nickname-card button,
.chat-form button {
    padding: 10px 16px;
    border: none;
    border-radius: 8px;
    background: var(--accent);
    color: #0b0d18;
    font-weight: 600;
    cursor: pointer;
}
.nickname-card button:hover,
.chat-form button:hover { background: var(--accent-hover); }
.error { color: var(--danger); font-size: 0.9rem; }

.chat-wrap { display: flex; flex-direction: column; height: calc(100vh - 160px); min-height: 480px; }
.chat-topbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
}
.chat-topbar h1 { margin: 0 0 2px 0; font-size: 1.3rem; }
.room-desc-inline { margin: 0; color: var(--text-dim); font-size: 0.85rem; }
.chat-you { font-size: 0.85rem; color: var(--text-dim); }

.chat-body {
    flex: 1;
    display: flex;
    gap: 12px;
    min-height: 0;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.chat-empty { color: var(--text-dim); }

.chat-msg { font-size: 0.95rem; line-height: 1.4; word-wrap: break-word; }
.chat-msg-nick { color: var(--accent); font-weight: 600; }
.chat-msg-time { float: right; color: var(--text-dim); font-size: 0.72rem; margin-left: 8px; }
.chat-msg-system { color: var(--text-dim); font-style: italic; font-size: 0.85rem; }

.chat-online {
    width: 180px;
    flex-shrink: 0;
    border-left: 1px solid var(--border);
    background: var(--bg-panel-2);
    padding: 14px;
    overflow-y: auto;
}
.chat-online h2 { font-size: 0.8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-dim); margin: 0 0 8px 0; }
.chat-online ul { list-style: none; margin: 0; padding: 0; font-size: 0.88rem; }
.chat-online li { padding: 3px 0; }
.muted { color: var(--text-dim); }

.chat-form { display: flex; gap: 8px; margin-top: 10px; }
.chat-form input {
    flex: 1;
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-panel);
    color: var(--text);
    font-size: 1rem;
}
.chat-status { min-height: 1.2em; font-size: 0.8rem; color: var(--danger); margin: 6px 2px 0; }

.chat-image-btn {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-panel-2);
    color: var(--text);
    font-size: 1.1rem;
    line-height: 1;
    cursor: pointer;
}
.chat-image-btn:hover { border-color: var(--accent); }
.chat-image-btn:disabled { opacity: .5; cursor: default; }

.chat-msg-image-link { display: block; margin-top: 4px; }
.chat-msg-image {
    display: block;
    max-width: min(320px, 100%);
    max-height: 320px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

/* Admin */
.admin-table { width: 100%; border-collapse: collapse; margin-top: 16px; }
.admin-table th, .admin-table td {
    text-align: left;
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
.admin-table th { color: var(--text-dim); font-weight: 600; }
.admin-actions form { display: inline; }
.btn-danger { background: var(--danger) !important; color: #1a0000 !important; }
.admin-nav { display: flex; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.admin-nav a { color: var(--text-dim); }
.admin-nav a.active { color: var(--text); font-weight: 600; }