* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Inter", Arial, sans-serif;
}

body {
    background: #f5f7fa;
    color: #333;
    overflow-x: hidden;
}

nav {
    width: 100%;
    padding: 18px 60px;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

nav .logo {
    font-size: 22px;
    font-weight: 700;
    color: #0086c9;
}

nav a {
    margin-left: 30px;
    color: #444;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
}

nav a:hover {
    color: #0086c9;
}

.hero {
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 40px 60px;
    background: linear-gradient(135deg, #c7f5ff, #e8fcff);
    gap: 50px;
}

.hero img {
    width: 480px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.18);
    max-width: 100%;
}

.hero-text {
    max-width: 520px;
}

.hero-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 20px;
    color: #0a3d62;
}

.hero-desc {
    font-size: 18px;
    color: #555;
    margin-bottom: 35px;
}

.hero-btn {
    padding: 16px 32px;
    background: #0086c9;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 700;
    display: inline-block;
    transition: 0.3s;
    box-shadow: 0 6px 14px rgba(0,134,201,0.4);
}

.hero-btn:hover {
    background: #006da7;
    transform: translateY(-3px);
}

.section-title {
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 10px;
    text-align: center;
}

.section-subtitle {
    text-align: center;
    max-width: 700px;
    margin: auto;
    margin-bottom: 40px;
    color: #666;
    font-size: 16px;
}

.section-dark,
.section-light {
    padding: 60px 40px;
}

.section-dark {
    background: #111b24;
    color: white;
}

.feature-grid,
.voices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    width: 100%;
}

.feature-card,
.voice-card {
    background: #1b2a34;
    border-radius: 14px;
    padding: 16px;
    box-shadow: 0 8px 18px rgba(0,0,0,0.3);
    transition: 0.3s;
}

.section-light .voice-card {
    background: white;
    box-shadow: 0 8px 18px rgba(0,0,0,0.1);
}

.feature-card:hover,
.voice-card:hover {
    transform: translateY(-6px);
}

.feature-card img,
.voice-card img {
    width: 100%;
    height: auto;
    border-radius: 12px;
}

.feature-card-title,
.voice-title {
    font-size: 18px;
    font-weight: 700;
    margin-top: 12px;
}

.feature-card-desc,
.voice-desc {
    font-size: 14px;
    margin-top: 6px;
    color: #cce0ed;
}

.section-light .voice-desc {
    color: #555;
}

footer {
    background: #0d1a22;
    padding: 20px;
    text-align: center;
    color: white;
}