:root {
    --primary: #3a86ff;
    --primary-dark: #4361ee;
    --secondary: #8338ec;
    --light: #343a40;
    --dark: #f8f9fa;
    --bg: #121212;
    --text: #e9ecef;
    --card-bg: #1e1e1e;
    --input-bg: #2d2d2d;
    --output-bg: #252525;
    --border: #444;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
}

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

h1 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.file-upload {
    margin-bottom: 2rem;
    text-align: center;
}

.upload-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.upload-btn:hover {
    background-color: var(--primary-dark);
}

#vsh-upload {
    display: none;
}

.gradient-editor {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.gradient-header {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 0.5fr 1fr 0.5fr;
    gap: 1rem;
    padding: 0.5rem 0;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1rem;
}

.gradient-item {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 0.5fr 1fr 0.5fr;
    gap: 1rem;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border);
}

.color-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-input input[type="color"] {
    width: 30px;
    height: 30px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
}

.color-input input[type="text"] {
    flex: 1;
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid var(--border);
    background-color: var(--input-bg);
    color: var(--text);
}

.speed-input {
    width: 100%;
    padding: 0.5rem;
    border-radius: 5px;
    border: 1px solid var(--border);
    background-color: var(--input-bg);
    color: var(--text);
}

.gradient-preview {
    height: 30px;
    border-radius: 5px;
    border: 1px solid var(--border);
}

.action-btn {
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-size: 1rem;
    transition: color 0.3s;
}

.action-btn:hover {
    color: var(--primary);
}

.add-btn {
    background-color: var(--secondary);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.add-btn:hover {
    background-color: var(--primary-dark);
}

.output-section {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.code-output {
    background-color: var(--output-bg);
    border-radius: 5px;
    padding: 1rem;
    font-family: monospace;
    white-space: pre;
    overflow-x: auto;
    margin-bottom: 1rem;
    min-height: 100px;
}

.download-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.download-btn:hover {
    background-color: var(--primary-dark);
}

footer {
    text-align: center;
    padding: 1rem;
    color: var(--text);
    opacity: 0.7;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.copy-btn {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 5px;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.copy-btn:hover {
    background-color: var(--primary-dark);
}

.copy-btn.success {
    background-color: #4CAF50;
}

.copy-btn.error {
    background-color: #F44336;
}