:root {
    /* Medical Clean Palette */
    --primary-blue: #0284c7;       /* Professional Medical Blue */
    --secondary-teal: #0d9488;    /* Trustworthy Teal */
    --bg-light: #f8fafc;          /* Soft background */
    --bg-white: #ffffff;
    --text-main: #1e293b;         /* Slate 800 */
    --text-muted: #64748b;        /* Slate 500 */
    --border-light: #e2e8f0;      /* Soft borders */
    --accent-gold: #eab308;
    --success-green: #10b981;
    --danger-red: #ef4444;
    
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);

    --font-display: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
}

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

body {
    background: var(--bg-light);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

h1, h2, h3, .logo {
    font-family: var(--font-display);
    font-weight: 600;
}

/* Navbar */
.navbar {
    background: var(--bg-white);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.logo {
    font-size: 1.25rem;
    color: var(--primary-blue);
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 1.5rem;
}

/* Layout */
.app-container {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: calc(100vh - 64px);
}

/* Sidebar */
.sidebar {
    background: var(--bg-white);
    border-right: 1px solid var(--border-light);
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.nav-item i {
    width: 20px;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.nav-item:hover {
    background: #f1f5f9;
    color: var(--primary-blue);
}

.nav-item.active {
    background: rgba(2, 132, 199, 0.08);
    color: var(--primary-blue);
}

/* Main Content */
.main-content {
    padding: 2rem;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Cards */
.card {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
    font-family: inherit;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
}

.btn-primary:hover {
    background: #0369a1;
}

.btn-outline {
    border-color: var(--border-light);
    background: transparent;
    color: var(--text-muted);
}

.btn-outline:hover {
    background: #f1f5f9;
    color: var(--text-main);
}

.btn-danger {
    background: var(--danger-red);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

/* Responsive */
/* Form Controls */
.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.form-group label.required::after {
    content: " *";
    color: var(--danger-red);
}

.form-control {
    width: 100%;
    height: 42px; /* Uniform height for all fields */
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    background-color: var(--bg-white);
    color: var(--text-main);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}

.form-control.is-invalid {
    border-color: var(--danger-red);
    background-color: rgba(239, 68, 68, 0.02);
}

.form-control.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.invalid-feedback {
    display: none;
    color: var(--danger-red);
    font-size: 0.75rem;
    margin-top: 0.375rem;
    font-weight: 500;
}

.form-control.is-invalid + .invalid-feedback {
    display: block;
}

.form-control.is-warning {
    border-color: var(--accent-gold);
    background-color: rgba(234, 179, 8, 0.02);
}

.form-control.is-warning:focus {
    box-shadow: 0 0 0 3px rgba(234, 179, 8, 0.1);
}

.warning-feedback {
    display: none;
    color: #854d0e; /* Darker gold for text readability */
    font-size: 0.75rem;
    margin-top: 0.375rem;
    font-weight: 500;
}

.form-control.is-warning + .warning-feedback {
    display: block;
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 80px 1fr;
    }
    .nav-item span {
        display: none;
    }
    .nav-item i {
        margin-right: 0;
    }
}

@media (max-width: 768px) {
    .app-container {
        display: block;
    }
    .sidebar {
        display: none;
    }
}

/* Tables */
.patient-table {
    width: 100%;
    border-collapse: collapse;
}

.patient-table th {
    text-align: left;
    padding: 1rem;
    border-bottom: 2px solid var(--border-light);
    color: var(--text-muted);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.patient-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.9375rem;
}

.patient-table tr:hover {
    background: #f8fafc;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-white);
    width: 100%;
    max-width: 800px;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow-y: auto;
    padding: 2.5rem;
}

.badge {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-warning { background: #fff7ed; color: #9a3412; }
.badge-success { background: #f0fdf4; color: #166534; }
.badge-primary { background: #eff6ff; color: #1e40af; }
.badge-info { background: #f0f9ff; color: #075985; }
.badge-danger { background: #fef2f2; color: #991b1b; }

.badge-status {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

/* Notifications */
.toast-container {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--primary-blue);
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast-success { border-left-color: var(--success-green); }
.toast-success i { color: var(--success-green); }

.toast-error { border-left-color: var(--danger-red); }
.toast-error i { color: var(--danger-red); }

.toast-warning { border-left-color: var(--accent-gold); }
.toast-warning i { color: var(--accent-gold); }

.toast i {
    font-size: 1.25rem;
}

.toast-content {
    flex-grow: 1;
}

.toast-title {
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--text-main);
}

.toast-message {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Casing Utilities */
.text-title { text-transform: capitalize; }
.text-upper { text-transform: uppercase; }
.text-lower { text-transform: lowercase; }

.name-display { text-transform: capitalize; }
.code-display { text-transform: uppercase; font-family: monospace; font-weight: 600; }
.email-display { text-transform: lowercase; }
/* Flatpickr Custom Theme - Medical Clean */
.flatpickr-calendar {
    background: #ffffff;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    font-family: var(--font-body);
}

.flatpickr-day.selected, .flatpickr-day.startRange, .flatpickr-day.endRange, 
.flatpickr-day.selected.prevMonthDay, .flatpickr-day.startRange.prevMonthDay, 
.flatpickr-day.endRange.prevMonthDay, .flatpickr-day.selected.nextMonthDay, 
.flatpickr-day.startRange.nextMonthDay, .flatpickr-day.endRange.nextMonthDay {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
}

.flatpickr-day.selected:hover, .flatpickr-day.startRange:hover, .flatpickr-day.endRange:hover, 
.flatpickr-day.selected.prevMonthDay:hover, .flatpickr-day.startRange.prevMonthDay:hover, 
.flatpickr-day.endRange.prevMonthDay:hover, .flatpickr-day.selected.nextMonthDay:hover, 
.flatpickr-day.startRange.nextMonthDay:hover, .flatpickr-day.endRange.nextMonthDay:hover {
    background: #0369a1;
    border-color: #0369a1;
}

.flatpickr-months .flatpickr-month {
    color: var(--text-main);
    fill: var(--text-main);
}

.flatpickr-current-month .flatpickr-monthDropdown-months {
    font-weight: 600;
}

.flatpickr-current-month input.cur-year {
    font-weight: 700;
    color: var(--primary-blue);
}

.flatpickr-day.today {
    border-color: var(--secondary-teal);
}

.flatpickr-day.today:hover {
    background: var(--secondary-teal);
    color: white;
}

.flatpickr-calendar.arrowTop:before, .flatpickr-calendar.arrowTop:after {
    border-bottom-color: var(--border-light);
}

.flatpickr-weekday {
    color: var(--text-muted);
    font-weight: 600;
}

.flatpickr-time input:hover, .flatpickr-time .flatpickr-am-pm:hover, 
.flatpickr-time input:focus, .flatpickr-time .flatpickr-am-pm:focus {
    background: #f1f5f9;
}