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

body {
    font-family: Arial, Helvetica, sans-serif;
    color: #333;
    background: #f5f5f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header */
.header {
    width: 100%;
    background: #fafafa;
    border-bottom: 1px solid #ddd;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-logo {
    display: block;
    line-height: 0;
}

.header-logo img {
    height: 74px;
    width: auto;
}

/* Card central */
.card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 4px;
    max-width: 460px;
    width: 100%;
    margin: 60px 20px;
    padding: 40px 36px;
}

.card h1 {
    font-size: 22px;
    color: #333;
    margin-bottom: 16px;
}

.card p {
    font-size: 14px;
    line-height: 1.6;
    color: #555;
    margin-bottom: 12px;
}

.card p:last-of-type {
    margin-bottom: 24px;
}

.card a:not(.oauth-btn) {
    color: #e53935;
    text-decoration: none;
}

.card a:not(.oauth-btn):hover {
    text-decoration: underline;
}

/* Botones OAuth */
.oauth-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.oauth-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 12px 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 15px;
    font-weight: 500;
    color: #333;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
}

.oauth-btn:hover {
    background: #fafafa;
    border-color: #bbb;
    text-decoration: none;
}

.oauth-btn svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.oauth-btn--google:hover {
    border-color: #4285f4;
}

.oauth-btn--facebook:hover {
    border-color: #1877f2;
}

/* Sin proveedores */
.no-providers {
    font-size: 14px;
    color: #999;
    font-style: italic;
}

/* Footer */
.footer {
    margin-top: auto;
    padding: 20px;
    font-size: 12px;
    color: #999;
}

.footer a {
    color: #999;
    text-decoration: none;
}

.footer a:hover {
    color: #e53935;
}