/* ============================================================================
   ForgeAI Govern™ - Main Stylesheet
   Healthcare AI Governance Platform
   ============================================================================ */

/* Screen-reader-only utility (WCAG 2.1 AA) */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

:root {
    --primary: #0F2A4A;
    --primary-light: #1a3a5c;
    --primary-dark: #060f1a;
    --accent: #14b8a6;
    --accent-light: #5eead4;
    --success: #059669;
    --success-light: #d1fae5;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --info: #0D9488;
    --info-light: #ccfbf1;
    --bg: #f8fafc;
    --bg-white: #ffffff;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --sidebar-width: 240px;
    --nav-height: 120px;
    --radius: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px 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: 1.5;
    font-size: 14px;
}

/* Screens */
.screen { display: none; }
.screen.active { display: block; }

/* Login */
#login-screen, #register-screen {
    background: linear-gradient(135deg, #060f1a 0%, #0F2A4A 50%, #060f1a 100%);
    min-height: 100vh;
}
.login-container {
    max-width: 420px;
    margin: 80px auto;
    padding: 40px;
    background: rgba(15, 42, 74, 0.6);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    border: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(12px);
}
.login-header { text-align: center; margin-bottom: 32px; }
.logo-full { margin-bottom: 16px; }
.logo-full-img { max-width: 260px; height: auto; }
.login-title { font-size: 22px; color: #ffffff; font-weight: 700; margin: 0 0 4px 0; }
.login-title sup { font-size: 10px; }
.logo { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 8px; }
.logo-img { width: 36px; height: 36px; }
.logo-icon { font-size: 28px; color: #14b8a6; }
.logo h1 { font-size: 22px; color: #ffffff; font-weight: 700; margin: 0; }
.logo h1 sup { font-size: 10px; }
.subtitle { color: rgba(148, 163, 184, 0.8); font-size: 14px; }
.login-footer { text-align: center; margin-top: 16px; }

/* Login form overrides for dark theme */
#login-screen .form-group label,
#register-screen .form-group label { color: #e2e8f0; }
#login-screen .form-group input,
#login-screen .form-group select,
#register-screen .form-group input,
#register-screen .form-group select {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255,255,255,0.15);
    color: #ffffff;
}
#login-screen .form-group input:focus,
#register-screen .form-group input:focus {
    border-color: #14b8a6;
    box-shadow: 0 0 0 3px rgba(20,184,166,0.2);
}
#login-screen .form-group input::placeholder,
#register-screen .form-group input::placeholder { color: rgba(148,163,184,0.5); }
#login-screen .btn-link,
#register-screen .btn-link { color: #14b8a6; }
#login-screen .error-message,
#register-screen .error-message { color: #f87171; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 13px; color: var(--text); }
.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; transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-group textarea { resize: vertical; min-height: 80px; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
    border-radius: 6px; font-size: 13px; font-weight: 600; cursor: pointer;
    border: 1px solid transparent; transition: all 0.2s;
}
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: #0f766e; }
.btn-success { background: var(--success); color: white; }
.btn-warning { background: var(--warning); color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); }
.btn-sm { padding: 4px 10px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; padding: 12px; }
.btn-link { background: none; border: none; color: var(--accent); cursor: pointer; font-size: 13px; }
.btn-link:hover { text-decoration: underline; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* Error */
.error-message { color: var(--danger); font-size: 13px; margin-top: 12px; text-align: center; }
.hidden { display: none !important; }

/* Navigation */
.top-nav {
    position: fixed; top: 0; left: 0; right: 0; height: var(--nav-height);
    background: #060f1a; color: white; display: flex;
    align-items: center; justify-content: space-between; padding: 0 20px;
    z-index: 100; box-shadow: var(--shadow);
    border-bottom: 1px solid rgba(20, 184, 166, 0.15);
}
.nav-left { display: flex; align-items: center; gap: 10px; }
.nav-logo-img { width: 160px; height: auto; }
.top-nav .logo-icon { color: #14b8a6; }
.nav-title { font-size: 16px; font-weight: 700; }
.nav-title sup { font-size: 8px; }
.nav-right { display: flex; align-items: center; gap: 16px; }
.user-info { font-size: 13px; opacity: 0.9; }
.top-nav .btn-outline { border-color: rgba(255,255,255,0.3); color: white; }
.top-nav .btn-outline:hover { background: rgba(255,255,255,0.1); }

/* Sidebar */
.sidebar {
    position: fixed; top: var(--nav-height); left: 0; bottom: 0; width: var(--sidebar-width);
    background: linear-gradient(180deg, #0F2A4A 0%, #060f1a 100%);
    border-right: 1px solid rgba(255,255,255,0.06); overflow-y: auto;
    z-index: 50; display: flex; flex-direction: column;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }
.nav-menu { list-style: none; padding: 12px 0; flex: 1; }
.nav-item {
    padding: 10px 20px; cursor: pointer; display: flex; align-items: center; gap: 10px;
    color: #ffffff; font-size: 13px; font-weight: 500; transition: all 0.2s;
}
.nav-item:hover { background: rgba(255,255,255,0.05); color: #e2e8f0; }
.nav-item.active { background: rgba(20, 184, 166, 0.1); color: #14b8a6; border-right: 3px solid #14b8a6; }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.sidebar-footer { padding: 16px; border-top: 1px solid rgba(255,255,255,0.08); }
.compliance-badge { display: flex; flex-wrap: wrap; gap: 4px; }
.compliance-badge span {
    font-size: 10px; padding: 2px 6px; background: rgba(255,255,255,0.06); border-radius: 3px;
    color: rgba(148, 163, 184, 0.7); border: 1px solid rgba(255,255,255,0.1);
}

/* Content */
.content {
    margin-top: var(--nav-height); margin-left: var(--sidebar-width);
    padding: 24px; min-height: calc(100vh - var(--nav-height));
}

/* Page Header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; }
.page-header h2 { font-size: 20px; font-weight: 700; color: var(--primary-dark); }
.page-header p { color: var(--text-secondary); font-size: 13px; margin-top: 2px; }

/* Cards */
.card {
    background: var(--bg-white); border-radius: var(--radius); border: 1px solid var(--border);
    padding: 20px; box-shadow: var(--shadow);
}
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.card-header h3 { font-size: 15px; font-weight: 600; }
.card-grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Stats */
.stat-card { text-align: center; }
.stat-value { font-size: 28px; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 12px; color: var(--text-secondary); margin-top: 4px; }

/* Badges */
.badge {
    display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 11px;
    font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;
}
.badge-critical { background: var(--danger-light); color: var(--danger); }
.badge-high { background: #fef2f2; color: #b91c1c; }
.badge-moderate { background: var(--warning-light); color: var(--warning); }
.badge-low { background: var(--success-light); color: var(--success); }
.badge-info { background: var(--info-light); color: var(--info); }
.badge-draft { background: #f1f5f9; color: var(--text-secondary); }
.badge-approved { background: var(--success-light); color: var(--success); }
.badge-rejected { background: var(--danger-light); color: var(--danger); }
.badge-deployed { background: var(--success-light); color: var(--success); }
.badge-proposed { background: var(--info-light); color: var(--info); }
.badge-validating { background: var(--warning-light); color: var(--warning); }
.badge-decommissioned { background: #f1f5f9; color: var(--text-muted); }
.badge-implemented { background: var(--success-light); color: var(--success); }
.badge-planned { background: var(--info-light); color: var(--info); }
.badge-partially_implemented { background: var(--warning-light); color: var(--warning); }

/* Tables */
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
thead th {
    text-align: left; padding: 10px 12px; background: var(--bg); font-weight: 600;
    color: var(--text-secondary); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border);
}
tbody td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tbody tr:hover { background: #fafbfc; }

/* Progress Bar */
.progress-bar { width: 100%; height: 8px; background: var(--bg); border-radius: 4px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 4px; transition: width 0.3s ease; }
.progress-fill.green { background: var(--success); }
.progress-fill.yellow { background: var(--warning); }
.progress-fill.red { background: var(--danger); }
.progress-fill.blue { background: var(--accent); }

/* Modal */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 200;
    display: flex; align-items: center; justify-content: center;
}
.modal {
    background: var(--bg-white); border-radius: var(--radius); width: 90%; max-width: 640px;
    max-height: 85vh; overflow-y: auto; box-shadow: var(--shadow-md);
}
.modal-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 20px; border-bottom: 1px solid var(--border);
}
.modal-header h3 { font-size: 16px; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); }
.modal-body { padding: 20px; }
.modal-footer { padding: 12px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* Score displays */
.score-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.score-item { text-align: center; padding: 12px; background: var(--bg); border-radius: 6px; }
.score-item .score-value { font-size: 24px; font-weight: 700; }
.score-item .score-label { font-size: 11px; color: var(--text-secondary); }

/* Radar chart placeholder */
.radar-chart { width: 100%; max-width: 300px; margin: 0 auto; }

/* Empty state */
.empty-state { text-align: center; padding: 48px; color: var(--text-secondary); }
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { margin-bottom: 16px; }

/* Toast */
.toast {
    position: fixed; bottom: 24px; right: 24px; padding: 12px 20px;
    background: var(--primary-dark); color: white; border-radius: 6px;
    font-size: 13px; z-index: 300; animation: slideIn 0.3s ease;
}
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
@keyframes slideIn { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* Loading */
.loading { display: flex; align-items: center; justify-content: center; padding: 48px; }
.spinner {
    width: 32px; height: 32px; border: 3px solid var(--border);
    border-top-color: var(--accent); border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .sidebar { display: none; }
    .content { margin-left: 0; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}