:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-color: #dee2e6;
    --error-color: #dc3545;
    --success-color: #28a745;
    
    /* Dark Mode bases for Radiology */
    --radiology-black: #000000;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

/* Login Page Only */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #ece9e6 0%, #ffffff 100%);
}

.login-container {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

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

.login-header h1 {
    margin: 0;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input[type="text"],
input[type="password"],
input[type="date"],
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-block {
    display: block;
    width: 100%;
}

.alert {
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Dashboard Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: white;
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    margin-bottom: 2rem;
    font-size: 1.25rem;
    font-weight: bold;
    text-align: center;
}

.nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
    flex-grow: 1;
}

.nav-links li {
    margin-bottom: 0.5rem;
}

.nav-links a {
    color: #bdc3c7;
    text-decoration: none;
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 4px;
}

.nav-links a:hover, .nav-links a.active {
    background-color: #34495e;
    color: white;
}

.user-info {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid #34495e;
    font-size: 0.9rem;
    text-align: center;
}

.main-content {
    flex-grow: 1;
    padding: 2rem;
    overflow-y: auto;
}

.header-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
}

.status-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.status-unassigned { background-color: #e2e3e5; color: #383d41; }
.status-assigned { background-color: #cce5ff; color: #004085; }
.status-reported { background-color: #d4edda; color: #155724; }

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 3rem;
    text-align: center;
    background: white;
    cursor: pointer;
    transition: border-color 0.2s;
}

.upload-area:hover {
    border-color: var(--primary-color);
}