/* --- Core Variables & Theming --- */
:root {
    --primary: #1D4ED8;
    --primary-hover: #1e40af;
    --bg-color: #f3f6f9;
    --card-bg: #ffffff;
    --text-color: #111827;
    --text-muted: #4b5563; 
    --border: #d1d5db; 
    --input-bg: #f9fafb;
    
    /* NHS/WHO Status Colors */
    --status-very-high: #9f1239; 
    --status-high: #e11d48;      
    --status-good: #16a34a;      
    --status-low: #e11d48;       
    --status-very-low: #9f1239;  
    
    --font-base: 17px; /* Increased default text size */
    --transition: all 0.2s ease-in-out;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #f8fafc;
    --text-muted: #cbd5e1;
    --border: #475569;
    --input-bg: #0f172a;
}

[data-text-size="large"] { --font-base: 19px; }
[data-text-size="xlarge"] { --font-base: 21px; }

* { box-sizing: border-box; margin: 0; padding: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }

body { background-color: var(--bg-color); color: var(--text-color); font-size: var(--font-base); -webkit-font-smoothing: antialiased; line-height: 1.6; }

.hidden { display: none !important; }

/* Typography */
h2 { font-size: 1.8rem; margin-bottom: 20px; }
h3 { font-size: 1.4rem; margin-bottom: 20px; font-weight: 600; }
p { margin-bottom: 15px; }
label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--text-color); }

/* Login */
#loginScreen { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 20px; }
.login-container { background: var(--card-bg); padding: 50px 40px; border-radius: 16px; box-shadow: 0 10px 25px -5px rgba(0,0,0,0.08); width: 100%; max-width: 450px; text-align: center; }
.login-logo { max-width: 140px; width: 100%; margin: 0 auto 30px; display: block; }

/* Forms & Inputs */
.input-group { position: relative; margin-bottom: 25px; text-align: left; }
input[type="text"], input[type="password"], input[type="number"], input[type="date"], input[type="time"], select, textarea {
    width: 100%; padding: 16px; border: 1px solid var(--border); border-radius: 10px; background: var(--input-bg); color: var(--text-color); font-size: 1rem; margin-bottom: 25px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.15); }
.pass-group i { position: absolute; right: 16px; top: 40%; transform: translateY(-50%); color: var(--text-muted); cursor: pointer; font-size: 1.4rem; }
.remember-group { display: flex; align-items: center; gap: 10px; margin-bottom: 30px; }
.remember-group input[type="checkbox"] { width: 20px; height: 20px; margin-bottom: 0; accent-color: var(--primary); }
.remember-group label { margin-bottom: 0; font-weight: normal; }

/* Buttons */
.btn-primary { background-color: var(--primary); color: #ffffff; border: none; padding: 16px 24px; border-radius: 10px; cursor: pointer; width: 100%; font-weight: 600; font-size: 1.05rem; box-shadow: 0 4px 6px -1px rgba(29,78,216,0.2); transition: var(--transition); margin-bottom: 15px; }
.btn-primary:hover { background-color: var(--primary-hover); transform: translateY(-2px); }

/* Layout & Navigation */
.top-nav { display: flex; justify-content: space-between; align-items: center; background-color: var(--card-bg); padding: 15px 5%; box-shadow: 0 2px 5px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
.nav-left { display: flex; align-items: center; gap: 15px; font-weight: 700; font-size: 1.3rem; }
.nav-left img { height: 40px; }
.nav-center { display: flex; gap: 10px; }
.nav-center button { background: transparent; border: none; padding: 12px 18px; color: var(--text-muted); font-weight: 600; font-size: 1rem; cursor: pointer; border-radius: 8px; transition: var(--transition); }
.nav-center button:hover, .nav-center button.active { background: var(--bg-color); color: var(--primary); }
.nav-right { display: flex; align-items: center; gap: 18px; }
.nav-right i { font-size: 1.6rem; cursor: pointer; color: var(--text-muted); transition: var(--transition); }
.nav-right i:hover { color: var(--primary); }

main { padding: 40px 5%; max-width: 1100px; margin: 0 auto; display: flex; flex-direction: column; gap: 30px; }
.card { background: var(--card-bg); border-radius: 16px; padding: 35px; box-shadow: 0 4px 10px rgba(0,0,0,0.04); border: 1px solid var(--border); }

/* Status Text & Borders */
.status-good { color: var(--status-good); font-weight: 700; }
.status-high, .status-low { color: var(--status-high); font-weight: 700; }
.status-very-high, .status-very-low { color: var(--status-very-high); font-weight: 700; }

.border-good { border: 2px solid var(--status-good) !important; }
.border-high, .border-low { border: 2px solid var(--status-high) !important; }
.border-very-high, .border-very-low { border: 2px solid var(--status-very-high) !important; }

/* Admin Table */
.admin-table { width: 100%; border-collapse: collapse; margin-top: 15px; margin-bottom: 25px; }
.admin-table th, .admin-table td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(--border); }
.admin-table th { font-weight: 600; color: var(--text-muted); }

/* Modals */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal-box { background: var(--card-bg); padding: 40px; border-radius: 16px; width: 90%; max-width: 450px; text-align: center; }

@media (max-width: 850px) {
    .top-nav { flex-direction: column; gap: 15px; padding: 20px 15px; }
    .nav-left, .nav-right { width: 100%; justify-content: center; }
    .nav-center { width: 100%; overflow-x: auto; padding-bottom: 5px; justify-content: flex-start; -ms-overflow-style: none; scrollbar-width: none; }
    .nav-center::-webkit-scrollbar { display: none; }
    .card { padding: 25px 20px; }
}

/* --- Desktop Grid Layouts for Compacting UI --- */
.dashboard-grid, .admin-grid {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.dashboard-averages-wrapper {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

@media (min-width: 900px) {
    .dashboard-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: min-content;
        gap: 20px;
    }
    .dashboard-grid .card-full {
        grid-column: 1 / -1;
    }
    
    .dashboard-averages-wrapper {
        flex-wrap: nowrap;
    }
    
    .dashboard-grid .card {
        padding: 25px;
    }
    .dashboard-grid h3 {
        margin-bottom: 15px;
    }

    /* Admin Panel Grid Layout */
    .admin-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    .admin-grid .admin-form {
        background: var(--bg-color);
        padding: 20px;
        border-radius: 12px;
        border: 1px solid var(--border);
    }
}