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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #1a1a1a;
    color: white;
    min-height: 100vh;
    overflow: hidden;
}


.main-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    padding: 20px;
}

.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 0.4fr;
    gap: 20px;
    width: 100%;
    height: 100%;
    max-width: 1200px;
    max-height: 800px;
}

.grid-container .menu-item:nth-child(1),
.grid-container .menu-item:nth-child(2) {
    grid-row: 1;
}

.grid-container .menu-item:nth-child(3) {
    grid-row: 2;
    grid-column: 1 / -1;
}

.menu-item.centered {
    margin: 0 auto;
    max-width: 50%;
    width: 80%;
}

.menu-item {
    background-color: #555;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.menu-item.small {
    grid-column: span 1;
    max-height: 150px;
}

.menu-item:hover {
    background-color: #666;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.menu-item:active {
    transform: translateY(0);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.menu-title {
    font-size: 2.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 4px;
    color: white;
    text-align: center;
}

/* Lock Screen Styles */
.lock-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.lock-container {
    text-align: center;
    padding: 20px;
}

.pattern-container {
    position: relative;
    display: inline-block;
}

.pattern-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 60px;
    padding: 40px;
}

.pattern-dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: #555;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.pattern-dot:hover {
    background-color: #666;
    transform: scale(1.2);
}

.pattern-dot.active {
    background-color: #4a9eff;
    transform: scale(1.3);
    box-shadow: 0 0 15px rgba(74, 158, 255, 0.5);
}

.pattern-dot.error {
    background-color: #ff4444;
    box-shadow: 0 0 15px rgba(255, 68, 68, 0.5);
}

.pattern-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* Responsive design for tablets */
@media (max-width: 1024px) {
    .menu-title {
        font-size: 2.2rem;
        letter-spacing: 3px;
    }

    .menu-item.small .menu-title {
        font-size: 1.5rem;
        letter-spacing: 2px;
    }
}

@media (max-width: 768px) {
    .grid-container {
        gap: 15px;
    }

    .menu-title {
        font-size: 1.8rem;
        letter-spacing: 2px;
    }

    .menu-item.small .menu-title {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }
}

@media (max-width: 480px) {
    .grid-container {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(4, 1fr);
        gap: 10px;
    }

    .menu-title {
        font-size: 1.5rem;
        letter-spacing: 1px;
    }

    .menu-item.small {
        max-height: 100px;
    }

    .menu-item.small .menu-title {
        font-size: 1rem;
    }
}