* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
}

body {
    overflow: hidden;
    background-color: #050510;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: white;
}

/* Scanline Overlay */
body::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.25) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.06), rgba(0, 255, 0, 0.02), rgba(0, 0, 255, 0.06));
    background-size: 100% 2px, 3px 100%;
    pointer-events: none;
    z-index: 999;
}

canvas {
    display: block;
    width: 100vw;
    height: 100vh;
}

#ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

#start-screen {
    background: rgba(10, 10, 20, 0.7);
    padding: 3rem;
    border-radius: 1rem;
    text-align: center;
    pointer-events: auto;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
}

h1 {
    margin-bottom: 1.5rem;
    font-size: 3rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 4px;
    background: linear-gradient(90deg, #ff00cc, #3333ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(51, 51, 255, 0.5);
}

button {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 1rem 3rem;
    color: white;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-radius: 0.5rem;
    cursor: pointer;
    margin-top: 2rem;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

button:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

button:active {
    transform: scale(0.98);
}

.small {
    font-size: 0.9rem;
    opacity: 0.6;
    margin-top: 1rem;
    letter-spacing: 1px;
}

/* --- New HUD Styles --- */

#top-bar {
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    pointer-events: none;
}

#timer {
    font-family: 'Courier New', monospace;
    font-size: 2rem;
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

#settings-btn {
    pointer-events: auto;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5rem;
    margin: 0;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

#settings-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 15px rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

#view-toggle {
    pointer-events: auto;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 0.7rem 1.4rem;
    border-radius: 999px;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
    cursor: pointer;
    margin: 0;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
}

#view-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.12);
}

#controls-hint {
    position: absolute;
    bottom: 40px;
    width: 100%;
    text-align: center;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    opacity: 0.5;
}

/* --- Modal Styles --- */

.modal {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: rgba(20, 20, 25, 0.9);
    padding: 2.5rem;
    border-radius: 1rem;
    width: 90%;
    max-width: 450px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 50px rgba(0, 0, 0, 0.8);
    text-align: center;
    animation: slideUp 0.3s ease;
}

.modal-content h2 {
    margin-bottom: 2rem;
    font-size: 2rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 1rem;
}

.setting-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
}

.setting-group label {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #aaa;
}

.setting-group.vertical {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.8rem;
}

/* Dropdown */
.dropdown {
    background: rgba(0, 0, 0, 0.3);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    font-size: 1rem;
    outline: none;
    cursor: pointer;
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #333;
    transition: .4s;
    border-radius: 34px;
    border: 1px solid #555;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: #aaa;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: #333;
    border-color: #33ff33;
}

input:checked+.slider:before {
    transform: translateX(24px);
    background-color: #33ff33;
    box-shadow: 0 0 10px #33ff33;
}

/* Segmented Control */
.segmented-control {
    background: rgba(0, 0, 0, 0.3);
    padding: 4px;
    border-radius: 0.5rem;
    display: flex;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.segmented-control input {
    display: none;
}

.segmented-control label {
    padding: 8px 16px;
    cursor: pointer;
    border-radius: 0.25rem;
    font-size: 0.8rem;
    transition: all 0.2s;
    color: #666;
    text-transform: uppercase;
    font-weight: bold;
}

.segmented-control input:checked+label {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

/* Action Buttons */
.action-buttons {
    margin-top: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.primary-btn {
    background: rgba(51, 255, 51, 0.1);
    border: 1px solid #33ff33;
    color: #33ff33;
    margin: 0;
}

.primary-btn:hover {
    background: rgba(51, 255, 51, 0.2);
    box-shadow: 0 0 20px rgba(51, 255, 51, 0.3);
}

.danger-btn {
    background: transparent;
    border: 1px solid #ff3333;
    color: #ff3333;
    margin: 0;
    font-size: 0.9rem;
    padding: 0.8rem;
    opacity: 0.8;
}

.danger-btn:hover {
    background: rgba(255, 51, 51, 0.1);
    opacity: 1;
    box-shadow: 0 0 15px rgba(255, 51, 51, 0.2);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}