:root {
    --graphite-bg: #0E1116;
    --graphite-surface: #171B22;
    --graphite-panel: #1E232B;
    --line: #2A303A;
    --accent: #FF7A1A;
    --accent-dim: #B85413;
    --text-primary: #EDEFF2;
    --text-secondary: #9AA3AE;
    --error: #E5484D;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--graphite-bg);
    color: var(--text-primary);
    font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

/* --- Login --- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.login-card {
    background: var(--graphite-surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 360px;
}
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.subtitle { color: var(--text-secondary); margin: 0 0 24px; }
.login-card label { display: block; font-size: 13px; color: var(--text-secondary); margin: 14px 0 6px; }
.login-card input {
    width: 100%;
    background: var(--graphite-panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    color: var(--text-primary);
    font-size: 15px;
}
.login-card button {
    margin-top: 22px;
    width: 100%;
    background: var(--accent);
    color: #1A0E00;
    border: none;
    border-radius: 8px;
    padding: 12px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
}
.error-banner {
    background: rgba(229, 72, 77, 0.15);
    border: 1px solid var(--error);
    color: var(--error);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 14px;
}

/* --- Feed --- */
.app { max-width: 720px; margin: 0 auto; padding: 0 16px 40px; }
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    border-bottom: 1px solid var(--line);
}
.topbar h1 { font-size: 18px; margin: 0; }
.link-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filter-chip {
    text-decoration: none;
    color: var(--text-secondary);
    background: var(--graphite-panel);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 13px;
}
.filter-chip.active { color: #1A0E00; background: var(--accent); border-color: var(--accent); }

.search-form { display: flex; gap: 8px; }
.search-form input {
    background: var(--graphite-panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 12px;
    color: var(--text-primary);
    min-width: 180px;
}
.search-form button {
    background: var(--graphite-panel);
    border: 1px solid var(--line);
    color: var(--text-primary);
    border-radius: 8px;
    padding: 8px 14px;
    cursor: pointer;
}

.feed { display: flex; flex-direction: column; gap: 10px; }
.empty { color: var(--text-secondary); text-align: center; padding: 40px 0; }

.date-divider {
    color: var(--text-secondary);
    font-size: 13px;
    margin: 18px 0 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.message-card {
    background: var(--graphite-surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 14px 16px;
}
.message-card.role-child { border-left: 3px solid var(--accent); }
.message-card.role-ai { border-left: 3px solid var(--line); }

.message-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    font-size: 12px;
}
.role-label { font-weight: 600; color: var(--text-primary); }
.time-label { color: var(--text-secondary); }
.deleted-badge {
    margin-left: auto;
    color: var(--error);
    background: rgba(229, 72, 77, 0.12);
    border-radius: 999px;
    padding: 3px 10px;
    font-size: 11px;
}

.message-text { margin: 0; line-height: 1.5; white-space: pre-wrap; }
.message-image {
    max-width: 100%;
    max-height: 320px;
    border-radius: 8px;
    display: block;
    margin-bottom: 8px;
}

@media (max-width: 480px) {
    .toolbar { flex-direction: column; align-items: stretch; }
    .search-form input { min-width: 0; flex: 1; }
}