:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #ffffff;
    --border-color: #333333;
    --accent-color: #bb86fc;
    --pass-color: #03dac6;
    --fail-color: #cf6679;
    --font: 'Space Grotesk', sans-serif;
}

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

body {
    font-family: var(--font);
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
}

.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(#333 1px, transparent 1px), linear-gradient(90deg, #333 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.1;
    z-index: -1;
}

.container {
    width: 100%;
    max-width: 800px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #bb86fc, #03dac6);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: #888;
}

.glass-panel {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    gap: 1rem;
}

.color-input-group {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: #aaa;
}

.color-picker-wrapper {
    display: flex;
    gap: 0.5rem;
    background: #2d2d2d;
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

input[type="color"] {
    width: 40px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
}

input[type="text"] {
    background: transparent;
    border: none;
    color: #fff;
    font-family: monospace;
    font-size: 1rem;
    width: 100%;
    text-transform: uppercase;
}

input[type="text"]:focus {
    outline: none;
}

#swap-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.2s;
}

#swap-btn:hover {
    background: #333;
    transform: rotate(180deg);
}

.preview-area {
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.preview-title {
    margin-bottom: 1rem;
}

.preview-btn {
    margin-top: 1.5rem;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    border: 2px solid currentColor;
    background: transparent;
    font-weight: bold;
    cursor: pointer;
    font-family: var(--font);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.result-card {
    background: #252525;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.result-card .label {
    display: block;
    font-size: 0.8rem;
    color: #888;
    margin-bottom: 0.5rem;
}

.result-card .value {
    font-size: 1.5rem;
    font-weight: bold;
}

.status {
    font-weight: bold;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.9rem;
}

.status.pass {
    background: rgba(3, 218, 198, 0.2);
    color: var(--pass-color);
}

.status.fail {
    background: rgba(207, 102, 121, 0.2);
    color: var(--fail-color);
}

.simulation-panel h3 {
    margin-bottom: 1rem;
}

.sim-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.sim-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: #aaa;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.2s;
}

.sim-btn:hover,
.sim-btn.active {
    background: var(--accent-color);
    color: #000;
    border-color: var(--accent-color);
}

.sim-desc {
    font-size: 0.9rem;
    color: #666;
}

.text-btn {
    background: none;
    border: none;
    color: #666;
    text-decoration: underline;
    cursor: pointer;
    margin-top: 1rem;
}

.text-btn:hover {
    color: #fff;
}

@media (max-width: 600px) {
    .controls {
        flex-direction: column;
    }

    .swap-btn-container {
        transform: rotate(90deg);
    }

    #swap-btn:hover {
        transform: rotate(270deg);
    }
}