/* ============================
   Health Intelligence Agent
   Style Sheet
   ============================ */

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #f8fafc;
    --card-bg: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --success: #16a34a;
    --warning: #d97706;
    --danger: #dc2626;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* Navbar */
.navbar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 24px;
}
.nav-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}
.nav-links { display: flex; gap: 16px; }
.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    padding: 4px 8px;
    border-radius: 4px;
}
.nav-links a:hover { color: var(--primary); background: #eff6ff; }
.nav-user {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}
.nav-user a { color: var(--primary); text-decoration: none; }

/* Main */
.main-content { max-width: 1200px; margin: 0 auto; padding: 24px; min-height: calc(100vh - 120px); }
.footer { text-align: center; padding: 24px; color: var(--text-secondary); font-size: 12px; border-top: 1px solid var(--border); }

/* Cards */
.card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 16px; box-shadow: var(--shadow); }
.card h2 { font-size: 18px; margin-bottom: 12px; color: var(--text); }

/* Stats */
.stats-bar { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; text-align: center; }
.stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

/* Articles */
.article-card { display: flex; gap: 12px; align-items: flex-start; }
.article-score { flex-shrink: 0; }
.score-badge {
    display: inline-block;
    width: 40px; height: 40px;
    line-height: 40px;
    text-align: center;
    border-radius: 8px;
    font-weight: 700;
    font-size: 16px;
    color: white;
}
.score-0 { background: #94a3b8; }  /* 0-2 */
.score-1 { background: #f59e0b; }  /* 3-4 */
.score-2 { background: #f97316; }  /* 5-6 */
.score-3 { background: #dc2626; }  /* 7-8 */
.score-4 { background: #7c3aed; }  /* 9-10 */
.article-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.article-meta { font-size: 12px; color: var(--text-secondary); margin-bottom: 8px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.source-tag { background: #eff6ff; color: var(--primary); padding: 1px 8px; border-radius: 4px; font-size: 11px; }
.warning-tag { background: #fef3c7; color: var(--warning); padding: 1px 8px; border-radius: 4px; font-size: 11px; }
.article-summary { font-size: 13px; color: var(--text-secondary); margin-bottom: 8px; }
.entity-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.entity-tag { padding: 1px 6px; border-radius: 4px; font-size: 11px; background: #f1f5f9; color: var(--text-secondary); }

/* Filters */
.filter-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.filter-form select, .filter-form input { padding: 6px 12px; border: 1px solid var(--border); border-radius: 4px; font-size: 13px; }

/* Search */
.search-box { margin-bottom: 24px; }
.search-box form { display: flex; gap: 8px; }
.search-input { flex: 1; padding: 10px 16px; border: 2px solid var(--border); border-radius: var(--radius); font-size: 15px; }
.search-input:focus { outline: none; border-color: var(--primary); }
.result-count { margin-bottom: 16px; color: var(--text-secondary); }

/* Buttons */
.btn { padding: 8px 16px; border: none; border-radius: 4px; cursor: pointer; font-size: 14px; text-decoration: none; display: inline-block; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { border: 1px solid var(--border); color: var(--text); background: var(--card-bg); }
.btn-full { width: 100%; }
.btn-sm { padding: 4px 12px; font-size: 12px; }

/* Tabs */
.tab-bar { display: flex; gap: 4px; margin: 12px 0; }
.tab { padding: 6px 16px; border-radius: 4px; text-decoration: none; font-size: 14px; color: var(--text-secondary); background: var(--bg); }
.tab.active { background: var(--primary); color: white; }
.tab:hover:not(.active) { background: #eff6ff; }

/* Forms */
.form-group { margin-bottom: 12px; }
.form-group label { display: block; font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.form-group input { width: 100%; padding: 8px 12px; border: 1px solid var(--border); border-radius: 4px; font-size: 14px; }

/* Auth */
.auth-page { display: flex; justify-content: center; align-items: center; min-height: 60vh; }
.auth-card { width: 100%; max-width: 400px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px; padding: 32px; box-shadow: var(--shadow); }
.auth-card h1 { text-align: center; margin-bottom: 4px; }
.auth-subtitle { text-align: center; color: var(--text-secondary); font-size: 14px; margin-bottom: 24px; }
.auth-footer { text-align: center; margin-top: 16px; font-size: 13px; color: var(--text-secondary); }
.auth-footer a { color: var(--primary); }

/* Alerts */
.alert { padding: 10px 16px; border-radius: 4px; margin-bottom: 16px; font-size: 13px; }
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

/* Tables */
.entity-table table { width: 100%; border-collapse: collapse; }
.entity-table th { text-align: left; padding: 8px 12px; font-size: 12px; color: var(--text-secondary); border-bottom: 2px solid var(--border); }
.entity-table td { padding: 8px 12px; font-size: 13px; border-bottom: 1px solid var(--border); }
.entity-name-cell { font-weight: 600; }
.entity-canonical { color: var(--text-secondary); font-size: 12px; }

/* Badges */
.badge { background: #eff6ff; color: var(--primary); padding: 1px 8px; border-radius: 10px; font-size: 12px; }
.badge-green { background: #dcfce7; color: var(--success); }

/* Entity grid */
.entity-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.entity-item { display: flex; justify-content: space-between; padding: 6px 0; border-bottom: 1px solid var(--border); font-size: 13px; }
.entity-item:last-child { border-bottom: none; }
.entity-name { font-weight: 500; }
.entity-count { color: var(--text-secondary); }

/* Empty state */
.empty-state { text-align: center; padding: 40px; color: var(--text-secondary); }
.empty-state code { background: #f1f5f9; padding: 2px 8px; border-radius: 4px; font-size: 12px; }

/* Page header */
.page-header { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.page-header h1 { font-size: 24px; }

/* Source link */
.source-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 11px;
    padding: 1px 6px;
    border: 1px solid #bfdbfe;
    border-radius: 4px;
    white-space: nowrap;
}
.source-link:hover { background: #eff6ff; }

/* Digest content (Markdown rendered) */
.digest-meta { font-size: 12px; color: var(--text-secondary); margin-bottom: 16px; }
.digest-content { line-height: 1.8; }
.markdown-body h1 { font-size: 22px; margin: 24px 0 12px; padding-bottom: 8px; border-bottom: 2px solid var(--border); }
.markdown-body h2 { font-size: 18px; margin: 20px 0 10px; color: var(--primary); }
.markdown-body h3 { font-size: 15px; margin: 16px 0 8px; }
.markdown-body h4 { font-size: 14px; margin: 12px 0 6px; }
.markdown-body p { margin: 8px 0; line-height: 1.8; }
.markdown-body ul, .markdown-body ol { margin: 8px 0; padding-left: 24px; }
.markdown-body li { margin: 4px 0; line-height: 1.6; }
.markdown-body strong { color: var(--text); font-weight: 600; }
.markdown-body em { color: var(--text-secondary); }
.markdown-body hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }
.markdown-body code { background: #f1f5f9; padding: 1px 6px; border-radius: 3px; font-size: 13px; }
.markdown-body pre { background: #1e293b; color: #e2e8f0; padding: 12px 16px; border-radius: 6px; overflow-x: auto; }
.markdown-body pre code { background: none; color: inherit; padding: 0; }
.markdown-body blockquote { border-left: 3px solid var(--primary); margin: 12px 0; padding: 4px 16px; color: var(--text-secondary); background: #f8fafc; }
.markdown-body a { color: var(--primary); }

/* Chat */
.chat-container { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; height: calc(100vh - 140px); }
.chat-header { margin-bottom: 16px; }
.chat-header h1 { font-size: 24px; }
.chat-subtitle { color: var(--text-secondary); font-size: 14px; }
.chat-messages { flex: 1; overflow-y: auto; padding: 8px 0; }
.chat-message { display: flex; gap: 12px; margin-bottom: 16px; }
.chat-message.user { flex-direction: row-reverse; }
.chat-message.user .message-content { background: var(--primary); color: white; border-radius: 12px 12px 4px 12px; }
.chat-message.assistant .message-content { background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px 12px 12px 4px; }
.message-avatar { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; background: #f1f5f9; }
.message-content { padding: 12px 16px; max-width: 75%; font-size: 14px; line-height: 1.7; }
.message-content p { margin: 4px 0; }
.message-content ul { margin: 4px 0; padding-left: 20px; }
.message-content li { margin: 2px 0; }
.chat-sources { margin-top: 12px; padding-top: 8px; border-top: 1px solid var(--border); font-size: 12px; }
.chat-sources ul { margin: 4px 0; padding-left: 16px; }
.chat-sources li { margin: 2px 0; }
.chat-sources a { color: var(--primary); }
.chat-input-area { padding: 12px 0; border-top: 1px solid var(--border); background: var(--bg); }
.chat-input-row { display: flex; gap: 8px; }
.chat-input-row input { flex: 1; padding: 10px 16px; border: 2px solid var(--border); border-radius: 8px; font-size: 14px; }
.chat-input-row input:focus { outline: none; border-color: var(--primary); }
.chat-input-row button { padding: 10px 20px; white-space: nowrap; }

/* Responsive */
@media (max-width: 768px) {
    .nav-container { flex-wrap: wrap; height: auto; padding: 12px 0; }
    .main-content { padding: 12px; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); }
    .entity-grid { grid-template-columns: 1fr; }
    .message-content { max-width: 85%; }
    .chat-container { height: calc(100vh - 160px); }
}