* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    background-color: #000;
    color: #fff;
    font-family: "Inter", "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: visible;
}

.controls {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(10, 10, 10, 0.85);
    padding: 16px 24px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 12px;
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.controls button {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 10px 18px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 500;
    font-size: 13px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.02em;
}

.controls button:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(255, 255, 255, 0.1);
}

.controls button:active {
    transform: translateY(0);
}

.controls button.active {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
}

.ratio-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ratio-control label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    font-weight: 500;
}

.ratio-control input {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    width: 80px;
    max-width: 80px;
    min-width: 80px;
    padding: 10px 12px;
    border-radius: 10px;
    text-align: center;
    overflow: hidden;
    font-size: 13px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.ratio-control input:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.12);
}

.ratio-control input::-webkit-outer-spin-button,
.ratio-control input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.ratio-control input[type=number] {
    -moz-appearance: textfield;
    appearance: textfield;
}

#canvas {
    cursor: grab;
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
}

#canvas:active {
    cursor: grabbing;
}

.message {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(10, 10, 10, 0.9);
    padding: 16px 28px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.message.show {
    opacity: 1;
}

@media (max-width: 768px) {
    .controls {
        flex-wrap: wrap;
        justify-content: center;
        width: calc(100% - 20px);
        left: 10px;
        right: 10px;
        transform: none;
        padding: 12px 16px;
        gap: 8px;
        bottom: 10px;
    }

    .controls button {
        padding: 10px 14px;
        font-size: 12px;
    }

    .ratio-control {
        width: 100%;
        justify-content: center;
    }

    .ratio-control input {
        width: 100px;
    }

    .message {
        max-width: 85vw;
        padding: 14px 20px;
        font-size: 14px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .controls {
        flex-wrap: wrap;
        justify-content: center;
        gap: 6px;
        padding: 10px 14px;
    }

    .controls button {
        padding: 8px 10px;
        font-size: 11px;
    }

    .ratio-control {
        flex-basis: 100%;
        justify-content: center;
        gap: 6px;
    }

    .ratio-control label {
        font-size: 11px;
    }

    .ratio-control input {
        width: 100px;
        padding: 8px;
        font-size: 11px;
    }
}