/* General Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Header */
header {
    background: #0077ff;
    color: #fff;
    padding: 1rem 0;
}

header .logo {
    font-size: 1.8rem;
    font-weight: bold;
}

header nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

header nav a {
    text-decoration: none;
    color: #fff;
    font-weight: bold;
}

#theme-toggle {
    background: #fff;
    color: #0077ff;
    border: none;
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 4px;
}

/* Hero Section */
.hero {
    background: url('B2.jpg') center/cover no-repeat;
    color: white;
    text-align: center;
    padding: 100px 20px;
}

.hero-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    background: #0077ff;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    transition: background 0.3s;
}

.cta-btn:hover {
    background: #005fcc;
}

/* Features */
.features {
    padding: 50px 20px;
    text-align: center;
}

.feature-grid {
    display: flex;
    gap: 20px;
    margin-top: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.feature {
    background: #fff;
    padding: 20px;
    border-radius: 8px;
    width: 250px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* About */
.about {
    padding: 40px 20px;
    text-align: center;
}

/* Subscribe */
.subscribe {
    background: #0077ff;
    color: #fff;
    text-align: center;
    padding: 50px 20px;
}

.subscribe input {
    padding: 10px;
    width: 250px;
    border: none;
    border-radius: 4px;
}

.subscribe button {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    background: #fff;
    color: #0077ff;
    cursor: pointer;
    margin-left: 5px;
}

#form-message {
    margin-top: 15px;
    font-weight: bold;
}

/* Footer */
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 20px;
}

/* Dark Mode */
body.dark-mode {
    background: #121212;
    color: #e0e0e0;
}

body.dark-mode header {
    background: #1e1e1e;
}

body.dark-mode .cta-btn {
    background: #444;
}

body.dark-mode .feature {
    background: #1e1e1e;
}

body.dark-mode .subscribe {
    background: #1e1e1e;
}