:root {
    --primary: #cc0000;
    --primary-hover: #ff0000;
    --bg-dark: #0a0b0d;
    --card-bg: rgba(15, 17, 21, 0.95);
    --border: rgba(255, 255, 255, 0.1);
}

body.auth-page {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: white;
    overflow-x: hidden;
}

/* Fondo con imagen */
.auth-wrapper {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
}

.auth-bg-image {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover;
    z-index: -1;
    filter: brightness(0.3) grayscale(0.2);
}

/* Contenedor Principal */
.auth-container {
    width: 100%;
    max-width: 500px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

/* Tabs */
.auth-tabs {
    display: flex;
    background: rgba(0,0,0,0.2);
    border-bottom: 1px solid var(--border);
}

.auth-tab {
    flex: 1;
    padding: 18px;
    text-align: center;
    cursor: pointer;
    font-weight: bold;
    font-size: 14px;
    color: #666;
    transition: 0.3s;
}

.auth-tab.active {
    color: white;
    background: rgba(204, 0, 0, 0.1);
    border-bottom: 2px solid var(--primary);
}

/* Formularios */
.auth-body { padding: 40px; }
.auth-form { display: none; }
.auth-form.active { display: block; animation: fadeIn 0.4s ease; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-group { margin-bottom: 20px; }

.form-group label {
    display: block;
    font-size: 13px;
    margin-bottom: 8px;
    color: #aaa;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: white;
    font-size: 15px;
    box-sizing: border-box;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255,255,255,0.1);
}

/* Botón Principal */
.btn-main {
    width: 100%;
    padding: 15px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-weight: bold;
    font-size: 16px;
    cursor: pointer;
    transition: 0.3s;
    margin-top: 10px;
}

.btn-main:hover { background: var(--primary-hover); transform: translateY(-2px); }

.back-link {
    color: white;
    text-decoration: none;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: 0.3s;
    opacity: 0.8;
}

.back-link:hover { opacity: 1; color: var(--primary); }

/* Modal */
.modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.8);
    display: none; align-items: center; justify-content: center; z-index: 1000;
}
.modal.active { display: flex; }
.modal-content {
    background: #1a1d23; padding: 40px; border-radius: 12px; width: 90%; max-width: 400px;
    position: relative; border: 1px solid var(--border);
}
.close-modal { position: absolute; top: 15px; right: 20px; font-size: 24px; cursor: pointer; color: #888; }