/* Gizat Analytics Platform — Main Stylesheet */
:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --bg: #f5f7fa;
    --surface: #ffffff;
    --text: #202124;
    --text-secondary: #5f6368;
    --border: #dadce0;
    --success: #34a853;
    --warning: #fbbc04;
    --danger: #ea4335;
    --shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
    --radius: 8px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; flex-direction: column; }

/* Navbar */
.navbar { background: var(--surface); border-bottom: 1px solid var(--border); padding: 0 24px; display: flex; align-items: center; height: 56px; box-shadow: var(--shadow); position: sticky; top: 0; z-index: 100; }
.nav-brand { display: flex; align-items: center; gap: 8px; margin-right: 32px; }
.nav-logo { font-size: 24px; }
.nav-title { font-size: 16px; font-weight: 600; color: var(--text); }
.nav-links { display: flex; gap: 4px; flex: 1; }
.nav-link { text-decoration: none; color: var(--text-secondary); padding: 8px 16px; border-radius: var(--radius); font-size: 14px; font-weight: 500; transition: all 0.15s; }
.nav-link:hover { background: var(--bg); color: var(--text); }
.nav-link.active { background: #e8f0fe; color: var(--primary); }
.nav-user { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.user-name { font-weight: 500; }
.badge-admin { background: #e8f0fe; color: var(--primary); padding: 2px 8px; border-radius: 12px; font-size: 11px; font-weight: 600; text-transform: uppercase; }
.badge-viewer { background: #f1f3f4; color: var(--text-secondary); padding: 2px 8px; border-radius: 12px; font-size: 11px; font-weight: 600; text-transform: uppercase; }
.btn-logout { color: var(--text-secondary); text-decoration: none; padding: 6px 12px; border-radius: var(--radius); font-size: 13px; transition: all 0.15s; }
.btn-logout:hover { background: #fce8e6; color: var(--danger); }

/* Content */
.content { flex: 1; padding: 24px; max-width: 1400px; margin: 0 auto; width: 100%; }

/* Footer */
.footer { text-align: center; padding: 16px; font-size: 12px; color: var(--text-secondary); border-top: 1px solid var(--border); }

/* Cards / KPIs */
.kpi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-bottom: 24px; }
.kpi-card { background: var(--surface); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.kpi-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-secondary); margin-bottom: 4px; }
.kpi-value { font-size: 28px; font-weight: 700; color: var(--text); }
.kpi-delta { font-size: 13px; margin-top: 4px; }
.kpi-delta.up { color: var(--success); }
.kpi-delta.down { color: var(--danger); }
.kpi-delta.flat { color: var(--text-secondary); }

/* Panels */
.panel { background: var(--surface); border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 24px; overflow: hidden; }
.panel-header { padding: 16px 20px; border-bottom: 1px solid var(--border); font-size: 15px; font-weight: 600; display: flex; align-items: center; justify-content: space-between; }
.panel-body { padding: 20px; }
.panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 900px) { .panel-grid { grid-template-columns: 1fr; } }

/* Tables */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th { text-align: left; padding: 10px 12px; background: var(--bg); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-secondary); border-bottom: 2px solid var(--border); }
.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
.data-table tbody tr:hover { background: #f8f9fa; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: #e37400; }
.text-muted { color: var(--text-secondary); }

/* Alerts */
.alert-bar { background: #fff3e0; border-left: 4px solid var(--warning); padding: 12px 16px; border-radius: 0 var(--radius) var(--radius) 0; margin-bottom: 16px; font-size: 13px; display: flex; align-items: center; gap: 8px; }
.alert-bar.danger { background: #fce8e6; border-color: var(--danger); }
.alert-bar.success { background: #e6f4ea; border-color: var(--success); }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border: none; border-radius: var(--radius); font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.15s; text-decoration: none; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #e8eaed; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* Login page */
.login-container { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: var(--bg); }
.login-box { background: var(--surface); border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.12); padding: 40px; width: 100%; max-width: 400px; }
.login-box h1 { font-size: 22px; margin-bottom: 8px; }
.login-box .subtitle { color: var(--text-secondary); font-size: 14px; margin-bottom: 28px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; color: var(--text-secondary); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px; outline: none; transition: border-color 0.15s; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,0.15); }
.form-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; padding: 8px 12px; background: #fce8e6; border-radius: 6px; }
.btn-login { width: 100%; padding: 12px; font-size: 15px; margin-top: 8px; }

/* Chat */
.chat-container { display: flex; flex-direction: column; height: calc(100vh - 56px - 60px); }
.chat-messages { flex: 1; overflow-y: auto; padding: 20px; }
.chat-message { margin-bottom: 16px; max-width: 85%; }
.chat-message.user { margin-left: auto; }
.chat-message .bubble { padding: 12px 16px; border-radius: 12px; font-size: 14px; line-height: 1.6; }
.chat-message.user .bubble { background: var(--primary); color: white; border-bottom-right-radius: 4px; }
.chat-message.assistant .bubble { background: var(--surface); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.chat-message .bubble table { width: 100%; border-collapse: collapse; margin: 8px 0; font-size: 13px; }
.chat-message .bubble th, .chat-message .bubble td { padding: 6px 10px; border: 1px solid var(--border); text-align: left; }
.chat-message .bubble th { background: var(--bg); font-weight: 600; }
.chat-input-area { padding: 16px 20px; border-top: 1px solid var(--border); background: var(--surface); display: flex; gap: 12px; }
.chat-input { flex: 1; padding: 12px 16px; border: 1px solid var(--border); border-radius: 24px; font-size: 14px; outline: none; resize: none; min-height: 44px; max-height: 120px; }
.chat-input:focus { border-color: var(--primary); }
.chat-send { padding: 10px 20px; background: var(--primary); color: white; border: none; border-radius: 24px; font-size: 14px; font-weight: 500; cursor: pointer; }
.chat-send:hover { background: var(--primary-dark); }
.chat-send:disabled { background: var(--border); cursor: not-allowed; }
.chat-typing { padding: 8px 16px; font-size: 13px; color: var(--text-secondary); font-style: italic; }
.suggested-questions { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 20px; }
.suggested-q { padding: 6px 14px; background: #e8f0fe; color: var(--primary); border-radius: 16px; font-size: 12px; cursor: pointer; border: none; transition: all 0.15s; }
.suggested-q:hover { background: #d2e3fc; }

/* Loading */
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay { position: absolute; inset: 0; background: rgba(255,255,255,0.7); display: flex; align-items: center; justify-content: center; z-index: 10; }

/* Responsive */
@media (max-width: 768px) {
    .navbar { padding: 0 12px; }
    .nav-links { gap: 0; }
    .nav-link { padding: 8px 10px; font-size: 13px; }
    .content { padding: 16px; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}