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

body {
    font-family: 'Inter', sans-serif;
    background: #f8fafc;
    color: #0f172a;
}

/* HEADER */
header {
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 10;
}

header a {
    text-decoration: none;
    margin-left: 25px;
    color: #0f172a;
    font-weight: 500;
    transition: 0.2s;
}

header a:hover {
    color: #2563eb;
}

/* HERO */
.hero {
    padding: 80px 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    flex-wrap: wrap;
}

.hero-text {
    max-width: 550px;
}

.hero-text h1 {
    font-size: 48px;
    line-height: 1.2;
    font-weight: 800;
    color: #0f172a;
}

.hero-text p {
    margin-top: 16px;
    font-size: 18px;
    color: #475569;
}

.cta-buttons {
    margin-top: 28px;
}

.cta-buttons a {
    padding: 14px 24px;
    border-radius: 8px;
    font-weight: 600;
    margin-right: 12px;
    text-decoration: none;
}

.btn-primary {
    background: #2563eb;
    color: white;
}

.btn-primary:hover {
    background: #1d4ed8;
}

.btn-secondary {
    background: white;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-secondary:hover {
    background: #eff6ff;
}

/* PHONE DEMO */
.phone {
    width: 320px;
    height: 620px;
    background: white;
    border-radius: 40px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    position: relative;
    overflow: hidden;
    border: 1px solid #cbd5e1;
}

.chat-bubble {
    background: #2563eb;
    color: white;
    padding: 12px 16px;
    border-radius: 14px;
    margin-bottom: 12px;
    max-width: 85%;
    font-size: 15px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.6s forwards;
}

.typing-indicator {
    width: 60px;
    height: 24px;
    background: #e2e8f0;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 14px;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: #475569;
    border-radius: 50%;
    margin: 0 3px;
    animation: blink 1.2s infinite;
}

.typing-indicator span:nth-child(2) { animation-delay: 0.2s; }
typing-indicator span:nth-child(3) { animation-delay: 0.4s; }

/* ANIMATIONS */
@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes blink {
    0%, 80%, 100% { opacity: 0.2; }
    40% { opacity: 1; }
}