:root {
    --primary-green: #008069;
    --dark-green: #00a884;
    --bg-color: #efeae2;
    --text-color: #111b21;
    --received-bubble: #ffffff;
    --sent-bubble: #d9fdd3;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--white);
    color: var(--text-color);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: var(--primary-green);
    color: var(--white);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

nav a {
    color: var(--white);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
}

nav a:hover {
    text-decoration: underline;
}

/* Hero */
.hero {
    background-color: var(--bg-color);
    padding: 80px 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.hero-text p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #54656f;
    line-height: 1.6;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background-color: var(--primary-green);
    color: var(--white);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary-green);
    color: var(--primary-green);
}

/* Phone Mockup */
.phone-mockup {
    width: 300px;
    height: 600px;
    background-color: #000;
    border-radius: 40px;
    border: 8px solid #333;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}

.screen {
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    padding: 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 15px;
    padding-bottom: 40px;
}

.chat-bubble {
    padding: 10px 15px;
    border-radius: 10px;
    font-size: 0.9rem;
    max-width: 80%;
    box-shadow: 0 1px 1px rgba(0,0,0,0.1);
}

.received {
    background-color: var(--received-bubble);
    align-self: flex-start;
    border-top-left-radius: 0;
}

.sent {
    background-color: var(--sent-bubble);
    align-self: flex-end;
    border-top-right-radius: 0;
}

/* Features */
.features {
    padding: 80px 0;
}

.features h2, .privacy h2, .support h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    border-radius: 20px;
    background-color: #f0f2f5;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-green);
    margin-bottom: 20px;
}

/* Privacy */
.privacy {
    background-color: #f9f9f9;
    padding: 80px 0;
}

.policy-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.policy-content h3 {
    margin-top: 20px;
    margin-bottom: 10px;
    color: var(--primary-green);
}

.policy-content p {
    margin-bottom: 15px;
    line-height: 1.6;
    color: #54656f;
}

/* Support */
.support {
    padding: 80px 0;
    text-align: center;
}

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

/* Footer */
footer {
    background-color: #111b21;
    color: #aebac1;
    padding: 30px 0;
    text-align: center;
}

@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .phone-mockup {
        display: none;
    }
}