:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --primary-color: #6200ee;
    --primary-variant: #3700b3;
    --secondary-color: #03dac6;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-radius: 12px;
    --spacing-unit: 16px;
    --bottom-nav-height: 60px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header/Content Area */
.main-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-unit);
    padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-unit));
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

h2 {
    margin-bottom: var(--spacing-unit);
    font-weight: 600;
    color: var(--text-primary);
}

/* Form Elements */
.form-group {
    margin-bottom: 24px;
    background: var(--surface-color);
    padding: 16px;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.9em;
    font-weight: 500;
}

/* Slider */
input[type=range] {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    margin-top: -8px;
    box-shadow: 0 0 10px rgba(98, 0, 238, 0.5);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: #444;
    border-radius: 2px;
}

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

.slider-value {
    text-align: right;
    font-size: 0.85em;
    color: var(--primary-color);
    margin-top: 4px;
}

/* Select */
select {
    width: 100%;
    padding: 12px;
    background-color: #2c2c2c;
    color: var(--text-primary);
    border: 1px solid #444;
    border-radius: 8px;
    font-size: 1em;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Description Box */
.description-box {
    width: 100%;
    min-height: 100px;
    padding: 12px;
    background-color: #2c2c2c;
    color: #ddd;
    border: 1px solid #444;
    border-radius: 8px;
    font-size: 0.95em;
    line-height: 1.5;
    resize: none;
}

/* Tags Box */
.tags-box {
    width: 100%;
    min-height: 80px;
    padding: 12px;
    background-color: #2c2c2c;
    color: #ddd;
    border: 1px solid #444;
    border-radius: 8px;
    font-size: 0.95em;
    line-height: 1.5;
    resize: none;
    font-family: monospace;
    /* To make tags look code-like */
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    width: 100%;
    height: var(--bottom-nav-height);
    background-color: var(--surface-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    border-top: 1px solid #333;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
    z-index: 100;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    padding: 8px;
    cursor: pointer;
    transition: color 0.2s;
    width: 50%;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-icon {
    width: 24px;
    height: 24px;
    margin-bottom: 4px;
    fill: currentColor;
}

.nav-label {
    font-size: 0.75em;
}