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

:root {
    --primary: #00A884;
    --primary-dark: #008F6F;
    --bg-main: #0A0E14;
    --bg-secondary: #111519;
    --bg-bubble-incoming: #1C2128;
    --bg-bubble-outgoing: #00A884;
    --text-primary: #FFFFFF;
    --text-secondary: #8B95A1;
    --border: #262C36;
    --shadow: rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    min-height: 100vh;
    background: var(--bg-secondary);
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 60px var(--shadow);
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.chat-container {
    flex: 1;
    padding: 40px 32px 80px;
    max-width: 720px;
    margin: 0 auto;
    width: 100%;
}

.timestamp {
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.message {
    margin-bottom: 16px;
    display: flex;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.4s ease forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.incoming {
    justify-content: flex-start;
}

.message.outgoing {
    justify-content: flex-end;
}

.bubble {
    max-width: 85%;
    padding: 16px 20px;
    border-radius: 16px;
    font-size: 16px;
    line-height: 1.5;
}

.incoming .bubble {
    background: var(--bg-bubble-incoming);
    border-bottom-left-radius: 4px;
    border: 1px solid var(--border);
}

.outgoing .bubble {
    background: var(--bg-bubble-outgoing);
    color: white;
    border-bottom-right-radius: 4px;
}

.typing-indicator {
    display: flex;
    gap: 6px;
    padding: 20px 24px;
    align-items: center;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 50%;
    animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-10px); }
}

.feature-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.feature-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.feature-item strong {
    display: block;
    font-size: 17px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.feature-item p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.bubble-cta {
    background: linear-gradient(135deg, var(--bg-bubble-incoming) 0%, #1A2029 100%);
    border: 2px solid var(--primary);
    padding: 32px 28px;
    text-align: center;
    max-width: 100%;
}

.bubble-cta h2 {
    font-size: 28px;
    margin-bottom: 12px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.bubble-cta p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.cta-button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 16px 48px;
    font-size: 17px;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    max-width: 280px;
    box-shadow: 0 4px 16px rgba(0, 168, 132, 0.3);
}

.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 168, 132, 0.4);
}

.cta-button:active {
    transform: translateY(0);
}

.social-proof {
    margin-top: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.avatars {
    display: flex;
    margin-left: 8px;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    border: 2px solid var(--bg-secondary);
    margin-left: -8px;
}

.avatar:nth-child(1) { background: #00A884; }
.avatar:nth-child(2) { background: #0088A8; }
.avatar:nth-child(3) { background: #6C00A8; }
.avatar:nth-child(4) { background: #A80067; }

.social-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer {
    padding: 24px 32px;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    border-top: 1px solid var(--border);
    background: var(--bg-main);
}

@media (max-width: 768px) {
    .header {
        padding: 20px 20px;
    }

    .logo {
        font-size: 18px;
    }

    .chat-container {
        padding: 32px 20px 60px;
    }

    .bubble {
        max-width: 90%;
        font-size: 15px;
        padding: 14px 16px;
    }

    .bubble-cta {
        padding: 28px 20px;
    }

    .bubble-cta h2 {
        font-size: 24px;
    }

    .cta-button {
        padding: 14px 40px;
        font-size: 16px;
    }

    .feature-icon {
        font-size: 24px;
    }

    .feature-item strong {
        font-size: 16px;
    }

    .feature-item p {
        font-size: 14px;
    }

    .social-proof {
        flex-direction: column;
        gap: 8px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .message {
        animation: none;
        opacity: 1;
        transform: none;
    }

    .status-dot {
        animation: none;
    }

    .typing-indicator span {
        animation: none;
    }
}