:root {
    --bg-base: #0f172a; /* Deep Slate */
    --bg-surface: rgba(30, 41, 59, 0.7); /* Glassmorphism surface */
    --bg-card: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    
    --accent-red: #ef4444;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --accent-orange: #f97316;
    --accent-purple: #a855f7;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    
    --font-sans: 'Inter', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-base);
    background-image: radial-gradient(circle at 15% 50%, rgba(239, 68, 68, 0.04), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(59, 130, 246, 0.04), transparent 25%);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
}

/* Glassmorphism Sidebar */
.sidebar {
    width: 280px;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-right: var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    z-index: 10;
}

.brand { margin-bottom: 2.5rem; }
.brand-logo { font-size: 1.75rem; font-weight: 800; letter-spacing: 2px; color: white; line-height: 1.1; }
.brand-sub { font-size: 0.7rem; font-weight: 700; color: var(--accent-red); letter-spacing: 1.5px; }

.sidebar-nav { flex: 1; display: flex; flex-direction: column; gap: 0.5rem; }
.nav-section { font-size: 0.75rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 0.5rem; letter-spacing: 1px; text-transform: uppercase; }

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.sidebar-footer { margin-top: auto; padding-top: 1.5rem; border-top: var(--glass-border); }
.tenant-selector label { display: block; font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 0.5rem; }
.tenant-selector select { width: 100%; padding: 0.5rem; border-radius: 6px; background: rgba(0,0,0,0.2); color: white; border: 1px solid var(--border-color); font-family: var(--font-sans); }

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 2rem 3rem;
}

.top-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.top-header h1 { font-size: 1.8rem; font-weight: 600; }

.btn-primary { background: var(--accent-red); color: white; border: none; padding: 0.6rem 1.2rem; border-radius: 6px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.btn-primary:hover { background: #dc2626; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3); }

.btn-danger { background: var(--accent-red); color: white; border: none; padding: 0.5rem 1rem; border-radius: 6px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.btn-danger:hover { background: #dc2626; transform: translateY(-1px); }

/* --- Cognito Auth Glassmorphism Modal --- */
.auth-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(8, 12, 22, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: var(--transition);
}

.auth-modal-backdrop.hidden {
    opacity: 0;
    pointer-events: none;
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: rgba(30, 41, 59, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 20px rgba(239, 68, 68, 0.15);
    border-radius: 16px;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-red), var(--accent-orange), var(--accent-blue));
}

.login-brand {
    text-align: center;
    margin-bottom: 2rem;
}

.login-brand-logo {
    font-size: 2.2rem;
    font-weight: 900;
    letter-spacing: 3px;
    color: white;
}

.login-brand-sub {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent-red);
    letter-spacing: 2px;
    margin-top: 2px;
}

.login-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-input {
    width: 100%;
    padding: 0.85rem 1rem;
    background: rgba(15, 23, 42, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-red);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
    background: rgba(15, 23, 42, 0.9);
}

.btn-login {
    width: 100%;
    padding: 0.9rem;
    background: linear-gradient(135deg, var(--accent-red), #dc2626);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 0.5rem;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(239, 68, 68, 0.4);
}

.auth-error-box {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 1.25rem;
    display: none;
}

.user-profile-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-red);
    color: white;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 700;
    font-size: 0.8rem;
}

.user-info-text {
    display: flex;
    flex-direction: column;
}

.user-email-text {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
}

.user-role-badge {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--accent-orange);
    text-transform: uppercase;
}

.btn-logout {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-secondary);
    padding: 0.3rem 0.6rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-logout:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--accent-red);
    border-color: var(--accent-red);
}

.btn-success { background: var(--accent-green); color: white; border: none; padding: 0.5rem 1rem; border-radius: 6px; font-weight: 600; cursor: pointer; transition: var(--transition); }

.spa-view { display: none; animation: fadeIn 0.4s ease forwards; }
.spa-view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Cards */
.card {
    background: var(--bg-surface);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--glass-shadow);
}

.instructions-card { border-left: 4px solid var(--accent-blue); }
.instructions-card .card-title { font-weight: 700; margin-bottom: 0.5rem; color: var(--accent-blue); }
.instructions-card ul { margin-left: 1.5rem; color: var(--text-secondary); font-size: 0.9rem; }
.instructions-card li { margin-bottom: 0.25rem; }

.scales-card { display: flex; flex-wrap: wrap; gap: 1.5rem; align-items: center; }
.scales-header { font-weight: 600; color: var(--text-secondary); }
.scale-group { display: flex; align-items: center; gap: 0.5rem; font-size: 0.85rem; }
.scale-label { font-weight: 600; }
.scale-label.blue { color: var(--accent-blue); }
.scale-label.orange { color: var(--accent-orange); }
.scale-label.purple { color: var(--accent-purple); }
.scale-label.green { color: var(--accent-green); }

.scale-group input {
    width: 60px; padding: 0.3rem; border-radius: 4px;
    background: rgba(0,0,0,0.3); border: 1px solid var(--border-color);
    color: white; font-family: var(--font-sans); text-align: center;
}

.chart-wrapper { position: relative; height: 500px; width: 100%; min-height: 400px; }