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

html, body {
    height: 100%;
    margin: 0;              /* enlève la marge par défaut du body */
}

body {
    min-height: 100vh;      /* au moins la hauteur de la fenêtre */
    display: flex;
    flex-direction: column; /* empile header, main, footer */
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f6f8;
    overflow-x: hidden; /* cache tout débordement horizontal */
}

header {
    background-color: #1f2937;
    color: #ffffff;
    padding: 20px;
    text-align: center;
    width: 100%;
}

.content {
    display: flex;
    justify-content: center;
    align-items: center;
    flex: 1;
}

main {
    flex: 1;
    max-width: 900px;
    margin: 40px auto 0;   /* marge en haut seulement, pas en bas */
    background-color: #ffffff;
    padding: 30px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}


.login-container {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

h2 {
    margin-bottom: 20px;
    text-align: center;
}

label {
    font-size: 16px;
    margin-bottom: 5px;
    display: block;
}

input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    box-sizing: border-box;
}

.button-normal {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    background-color: #2563eb;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.button-big {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    background-color: #2563eb;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

button:hover {
    background-color: #1d4ed8;
}

.error-message {
    color: red;
    text-align: center;
    margin-top: 10px;
}

footer {
    text-align: center;
    font-size: 14px;
    color: #6b7280;
    padding: 20px;
    margin-top: auto;      /* pousse le footer en bas si possible */
}

table {
    width: 100%;
    border-collapse: collapse;
}
th, td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
}
th {
    background-color: #f9fafb;
}
.up {
    color: #166534;
    font-weight: bold;
}
.down {
    color: #991b1b;
    font-weight: bold;
}