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

:root {
    --accent-color: #22c55e;
    --accent-dark: #166534;
}

body {
    font-family: 'JetBrains Mono', monospace;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0a0a0a;
    padding: 20px;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(0deg,
            transparent,
            transparent 2px,
            rgba(0, 0, 0, 0.1) 2px,
            rgba(0, 0, 0, 0.1) 4px);
    pointer-events: none;
    z-index: 1000;
}

.container {
    background: #111;
    border: 2px solid var(--accent-color);
    padding: 40px;
    width: 100%;
    max-width: 440px;
    position: relative;
}

.container::before,
.container::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent-dark);
}

.container::before {
    top: -6px;
    left: -6px;
    border-right: none;
    border-bottom: none;
}

.container::after {
    bottom: -6px;
    right: -6px;
    border-left: none;
    border-top: none;
}

.header {
    margin-bottom: 32px;
    position: relative;
}

.ascii-decorator {
    color: #22c55e;
    font-size: 11px;
    letter-spacing: 2px;
    margin-bottom: 8px;
    opacity: 0.7;
}

h1 {
    color: #fff;
    font-size: 24px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 4px;
    font-family: 'Space Mono', monospace;
}

h1 span {
    color: #22c55e;
}

.subtitle {
    color: #666;
    font-size: 11px;
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.form-group {
    margin-bottom: 24px;
}

label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #22c55e;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

label::before {
    content: '>';
    color: var(--accent-dark);
}

.resolution-inputs {
    display: flex;
    gap: 16px;
}

.resolution-inputs .input-wrapper {
    flex: 1;
    position: relative;
}

.input-wrapper span {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: #444;
    font-size: 11px;
    pointer-events: none;
    text-transform: uppercase;
}

input[type="number"] {
    width: 100%;
    background: #0a0a0a;
    border: 1px solid #333;
    padding: 14px 40px 14px 14px;
    color: #fff;
    font-size: 14px;
    font-family: 'JetBrains Mono', monospace;
    transition: border-color 0.15s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-color);
}

input[type="number"]::placeholder {
    color: #444;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
    background: #0a0a0a;
    border: 1px solid #333;
    padding: 8px 16px 8px 8px;
    transition: border-color 0.15s ease;
}

.color-picker-wrapper:focus-within {
    border-color: var(--accent-color);
}

input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    width: 48px;
    height: 48px;
    border: none;
    cursor: pointer;
    background: transparent;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 2px solid #333;
}

input[type="color"]::-moz-color-swatch {
    border: 2px solid #333;
}

.hex-display {
    color: #fff;
    font-size: 14px;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.preview-section {
    margin-bottom: 28px;
}

.preview {
    width: 100%;
    aspect-ratio: 16 / 9;
    border: 1px solid #333;
    position: relative;
}

.preview::before {
    content: 'PREVIEW';
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 9px;
    color: #333;
    letter-spacing: 2px;
}

button {
    width: 100%;
    background: var(--accent-color);
    color: #0a0a0a;
    border: none;
    padding: 16px 24px;
    font-size: 12px;
    font-weight: 700;
    font-family: 'Space Mono', monospace;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

button:hover {
    background: #fff;
}

button:active {
    background: var(--accent-dark);
}

button svg {
    width: 16px;
    height: 16px;
}

.footer {
    margin-top: 24px;
    text-align: center;
    color: #333;
    font-size: 10px;
    letter-spacing: 1px;
}

.error-message {
    background: #1a0a0a;
    border: 1px solid #dc2626;
    color: #ef4444;
    padding: 12px 14px;
    margin-bottom: 20px;
    font-size: 11px;
    letter-spacing: 0.5px;
    display: none;
}

.error-message::before {
    content: '> ';
    color: #dc2626;
}

.error-message.visible {
    display: block;
    animation: glitch 0.1s ease-in-out;
}

@keyframes glitch {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-2px);
    }

    75% {
        transform: translateX(2px);
    }
}

/* Hide number input spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}