:root {
    --primary: #2563eb;
    --text: #1e293b;
    --text-muted: #64748b;
    --bg: #ffffff;
    --secondary-bg: #f8fafc;
    --border: #e2e8f0;
}

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

body {
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.5;
}

/* Navbar */
.navbar {
    padding: 20px 8%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; background: rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(15px); z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
}

.logo span { color: var(--text); }

.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { text-decoration: none; color: var(--text); font-weight: 500; font-size: 0.95rem; }
.nav-links .login-btn { background: none; border: none; font-weight: 600; cursor: pointer; color: var(--text); }

.signup-btn {
    background: var(--primary);
    color: white; border: none;
    padding: 10px 20px; border-radius: 8px;
    font-weight: 600; cursor: pointer; transition: 0.3s;
}

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

/* Hero */
.hero {
    padding: 100px 8%;
    display: flex;
    align-items: center;
    gap: 100px;
    background: radial-gradient(circle at top right, #eff6ff 0%, transparent 40%);
}

.hero-text { flex: 1; }
.hero-image { flex: 1.2; position: relative; }

.hero-text h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 25px;
    letter-spacing: -2px;
}

.hero-text h1 span { color: var(--primary); }

.hero-text p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 550px;
}

.input-group {
    display: flex;
    background: white;
    padding: 8px;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
    max-width: 500px;
}

.input-group input {
    flex: 1;
    border: none;
    padding: 10px 20px;
    outline: none;
    font-size: 1rem;
}

.input-group button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
}

.social-proof p { font-size: 0.9rem; margin-bottom: 15px; }
.social-proof .icons { display: flex; gap: 30px; color: var(--text-muted); }

/* Window effect */
.window-frame {
    background: white;
    padding: 15px;
    border-radius: 12px;
    box-shadow: 10px 40px 100px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    transition: 0.5s;
}

.window-frame:hover { transform: perspective(1000px) rotateY(0) rotateX(0); }

.window-frame .dots { display: flex; gap: 8px; margin-bottom: 15px; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.red { background: #ff5f57; }
.yellow { background: #febc2e; }
.green { background: #28c840; }

.window-frame img { width: 100%; border-radius: 5px; }

/* Features */
.features { padding: 100px 8%; text-align: center; background: var(--secondary-bg); }
.features h2 { font-size: 2.5rem; font-weight: 800; margin-bottom: 60px; }

.feature-grid { display: flex; gap: 30px; justify-content: center; }
.feature {
    background: white;
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--border);
    flex: 1;
    transition: 0.3s;
}

.feature:hover { border-color: var(--primary); transform: translateY(-10px); }

.ico-box {
    width: 60px; height: 60px;
    background: #eff6ff;
    color: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.feature h3 { margin-bottom: 15px; }
.feature p { color: var(--text-muted); font-size: 0.95rem; }

@media (max-width: 1024px) {
    .hero { flex-direction: column; text-align: center; }
    .hero-text h1 { font-size: 2.8rem; }
    .input-group { margin-inline: auto; }
    .social-proof .icons { justify-content: center; }
    .feature-grid { flex-direction: column; }
    .navbar { padding: 20px 5%; }
    .nav-links { display: none; }
}