/* style.css */

:root {
    --primary-color: #0056b3; /* Professional Blue */
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --background-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --border-radius: 8px;
    --spacing-unit: 16px;
}

* {
    box_sizing: border_box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px; /* Readable base size */
}

/* Layout */
.container {
    max-width: 800px; /* Mobile-focused max width */
    margin: 0 auto;
    padding: var(--spacing-unit);
}

/* Typography */
h1, h2, h3 {
    margin-bottom: var(--spacing-unit);
    color: var(--primary-color);
}

h1 { font-size: 1.8rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.2rem; }

/* Forms */
.form-group {
    margin-bottom: var(--spacing-unit);
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 12px; /* Large touch target */
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 16px;
}

button, .btn {
    display: inline-block;
    padding: 12px 24px; /* Large touch target */
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    width: 100%; /* Full width on mobile by default */
}

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

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

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

/* Cards */
.card {
    background-color: var(--card-bg);
    padding: var(--spacing-unit);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: var(--spacing-unit);
}

/* Alerts */
.alert {
    padding: 12px;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-unit);
    background-color: #e2e6ea;
    border: 1px solid #d6d8db;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

/* Navigation */
.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-unit);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar a {
    color: white;
    text-decoration: none;
    margin-left: 10px;
}

/* Utilities */
.text-center { text-align: center; }
.mt-2 { margin-top: var(--spacing-unit); }
.mb-2 { margin-bottom: var(--spacing-unit); }

/* Responsive */
@media (min-width: 600px) {
    button, .btn {
        width: auto; /* Natural width on larger screens */
    }
}