:root {
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: rgba(255, 255, 255, 0.9);
    --text-color: #333;
    --number-bg: #fff;
    --number-border: #ddd;
    --btn-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.dark-mode {
    --bg-gradient: linear-gradient(135deg, #2c3e50 0%, #000000 100%);
    --card-bg: rgba(30, 30, 30, 0.9);
    --text-color: #f0f2f5;
    --number-bg: #444;
    --number-border: #555;
    --btn-gradient: linear-gradient(135deg, #434343 0%, #000000 100%);
}

body {
    font-family: 'Helvetica Neue', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background 0.3s ease;
    padding: 2rem 0;
}

.container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.card {
    background-color: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
    width: 100%;
    max-width: 400px;
    transition: background-color 0.3s ease;
}

.partnership-card h3 {
    margin-bottom: 1.5rem;
    color: var(--text-color);
    text-align: center;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--number-border);
    border-radius: 0.5rem;
    background-color: var(--number-bg);
    color: var(--text-color);
    box-sizing: border-box;
    font-family: inherit;
    font-size: 1rem;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.submit-btn {
    background: var(--btn-gradient);
    color: #fff;
    border: none;
    padding: 1rem;
    border-radius: 0.5rem;
    font-size: 1.1rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    width: 100%;
    font-weight: bold;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

#disqus_thread_container {
    width: 100%;
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: 1rem;
    box-sizing: border-box;
}

#theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 100;
    background: var(--btn-gradient);
    color: #fff;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: bold;
}