/* ===============================
   Global Variables & Base Styles
   =============================== */
:root {
    --primary: #5A9;
    --bg: #f9f9f9;
    --text: #222;
    --card-bg: #fff;
    --card-border: #ddd;
    --focus-outline: 3px dashed var(--primary);
}

body {
    font-family: Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 2rem;
}

h1 {
    margin: 0;
    color: #333;
}

/* ===============================
   Header & Footer
   =============================== */
header {
    background-color: var(--primary);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
}

footer {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.9rem;
    color: #666;
}

/* ===============================
   Layout Containers
   =============================== */
.container {
    margin-top: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* ===============================
   Cards
   =============================== */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

.card h2 {
    margin-top: 0;
    font-size: 1.2rem;
}

.card a {
    display: inline-block;
    margin-top: 0.5rem;
    color: var(--primary);
    text-decoration: none;
}

/* ===============================
   Buttons & Links
   =============================== */
a:focus,
button:focus {
    outline: var(--focus-outline);
}

a.button,
a.button:visited {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    margin-top: 1rem;
}

a.button:hover {
    background: #4a8;
}

/* ===============================
   Tables
   =============================== */
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

th,
td {
    padding: 0.75rem;
    border: 1px solid #ccc;
    text-align: left;
}

th {
    background: #eee;
}

/* ===============================
   Forms
   =============================== */
.form-container {
    max-width: 500px;
    margin: 2rem auto;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--card-border);
}

form label {
    display: block;
    margin-top: 1rem;
    font-weight: bold;
}

form input[type="text"],
form input[type="number"],
form textarea,
form select {
    width: 100%;
    padding: 0.5rem;
    margin-top: 0.25rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 1rem;
    background-color: #fff;
}

form input[type="text"]:focus,
form input[type="number"]:focus,
form textarea:focus,
form select:focus {
    outline: var(--focus-outline);
}

button[type="submit"] {
    margin-top: 1.5rem;
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
}

button[type="submit"]:hover {
    background-color: #4a8;
}

/* ===============================
   Error Messages
   =============================== */
.error {
    color: red;
    margin-top: 1rem;
    font-weight: bold;
}