:root {
    --primary-color: #6200ea;
    --secondary-color: #03dac6;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --completed-color: #4bb71b;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

body.dark-mode {
    --text-color: #f5f5f5;
    --bg-color: #333;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

body.dark-mode header {
    background-color: #222;
}

.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    text-align: center;
    padding: 150px 0 100px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

.cta-button {
    display: inline-block;
    background-color: #fff;
    color: var(--primary-color);
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.cta-button:hover {
    background-color: var(--secondary-color);
    color: #fff;
}

.project-details {
    padding: 80px 0;
}

.project-details h2, .project-details h3 {
    color: var(--primary-color);
}

.project-details ul {
    list-style-type: disc;
    padding-left: 20px;
}

.completed {
    color: var(--completed-color);
}

.project-progress {
    padding: 80px 0;
    background-color: #f9f9f9;
}

body.dark-mode .project-progress {
    background-color: #2a2a2a;
}

.project-progress h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
}

.battery {
    display: flex;
    justify-content: center;
    margin-bottom: 40px;
}

.cell {
    width: 30px;
    height: 60px;
    margin: 0 5px;
    border: 2px solid var(--primary-color);
    background-color: transparent;
}

.cell.completed {
    background-color: var(--completed-color);
}

.progress-steps {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.progress-steps li {
    margin-bottom: 10px;
}

.progress-steps .completed {
    color: var(--completed-color);
}

.invest {
    padding: 80px 0;
}

.invest h2 {
    color: var(--primary-color);
}

footer {
    background-color: var(--primary-color);
    color: #fff;
    text-align: center;
    padding: 20px 0;
}