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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    text-align: center;
}

/* Header */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 12px 0;
    background: rgba(0,0,0,0.15);
    backdrop-filter: blur(6px);
    z-index: 1100;
}

.brand-mark {
    width: 36px;
    height: 36px;
    margin-right: 10px;
}

.app-title {
    font-family: 'Arial', sans-serif;
    font-weight: 800;
    font-size: 24px;
    letter-spacing: 0.5px;
    color: #fff;
    background: linear-gradient(135deg, #ffeb3b 0%, #ffffff 40%, #ffeb3b 60%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
}

/* Language Switcher */
.lang-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    padding: 6px 10px;
    background: rgba(0,0,0,0.25);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 999px;
}

.lang-switcher label {
    color: #ffffff;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.lang-switcher select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding: 6px 28px 6px 10px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.6);
    background: rgba(255,255,255,0.9);
    color: #1f2937; /* dark slate */
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    cursor: pointer;
}

.lang-switcher select:focus {
    outline: 2px solid #ffeb3b;
    outline-offset: 2px;
}

.lang-switcher select:hover {
    background: #ffffff;
}

/* Menú Principal */
.menu {
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
}

.menu-content {
    background-color: white;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    min-width: 500px;
    max-width: 600px;
}

.menu-content h1 {
    margin-bottom: 10px;
    color: #1f2937; /* stronger contrast */
    font-size: 2.5em;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-subtitle {
    margin-bottom: 30px;
    color: #374151; /* improve contrast */
    font-size: 1.1em;
}

.menu-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.menu-button {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: white;
    border: 3px solid #667eea;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    text-decoration: none;
}

.menu-button:hover {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.menu-button:hover .menu-button-text h3,
.menu-button:hover .menu-button-text p {
    color: white;
}

.menu-button-icon {
    font-size: 3em;
    min-width: 60px;
    text-align: center;
}

.menu-button-text h3 {
    margin: 0 0 5px 0;
    color: #1f2937;
    font-size: 1.5em;
    transition: color 0.3s;
}

.menu-button-text p {
    margin: 0;
    color: #374151;
    font-size: 0.95em;
    transition: color 0.3s;
}

/* Responsive */
@media (max-width: 768px) {
    .menu-content {
        min-width: 90%;
        max-width: 90%;
        padding: 30px 20px;
    }

    .menu-content h1 {
        font-size: 2em;
    }

    .menu-button {
        padding: 15px;
        gap: 15px;
    }

    .menu-button-icon {
        font-size: 2.5em;
        min-width: 50px;
    }

    .menu-button-text h3 {
        font-size: 1.2em;
    }

    .menu-button-text p {
        font-size: 0.85em;
    }
}