:root {
    --primary: #4669fa;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-gradient: linear-gradient(180deg, #f0f4ff 0%, #ffffff 100%);
    --white: #ffffff;
    --bg-body: #ffffff;
    --bg-card: #ffffff;
    --nav-bg: #ffffff;
    --border-color: #edf2f7;
}

.dark-theme {
    --text-dark: #f8fafc;
    --text-light: #94a3b8;
    --bg-gradient: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
    --white: #0f172a;
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --nav-bg: #0f172a;
    --border-color: #334155;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Plus Jakarta Sans', sans-serif;
    transition: background 0.3s ease, color 0.3s ease;
}

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

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

.navbar {
    background: var(--nav-bg);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
    transition: all 0.4s ease;
}

.navbar.scrolled {
    margin: 0 15px;
    border-radius: 0 0 12px 12px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.07);
    padding: 10px 0;
}

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

.logo {
    font-weight: 800;
    font-size: 1.4rem;
    color: var(--primary);
}

.logo span { color: #f59e0b; }

.nav-right {
    display: flex;
    gap: 12px;
}

.icon-btn, .btn-login-small {
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    padding: 10px 15px;
    border-radius: 10px;
    cursor: pointer;
    color: var(--text-dark);
}

.btn-login-small {
    background: var(--primary);
    color: white;
    border: none;
}

.hero {
    background: var(--bg-gradient);
    padding: 60px 0 20px;
    text-align: center;
}

.hero-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 15px;
}

.hero-subtitle {
    color: var(--text-light);
    font-size: 1rem;
    max-width: 500px;
    margin: 0 auto 30px;
}

.btn-login-main {
    background: var(--primary);
    color: white;
    text-decoration: none;
    padding: 14px 40px;
    border-radius: 12px;
    font-weight: 600;
    display: inline-block;
    box-shadow: 0 10px 20px rgba(70, 105, 250, 0.2);
}

.illustration-container {
    margin-top: 50px;
    position: relative;
    display: flex;
    justify-content: center;
}

.mockup-wrapper {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.phone-img {
    width: 200px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.floating-element {
    position: absolute;
    background: var(--bg-card);
    color: var(--text-dark);
    padding: 10px 15px;
    border-radius: 10px;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.f-left { top: 20%; left: 0; }
.f-right { bottom: 30%; right: 0; }

.features {
    padding: 60px 0;
    text-align: center;
}

.badge-blue {
    background: #ebf0ff;
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 700;
}

.section-title {
    margin-top: 15px;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-dark);
}

.section-title span { font-weight: 400; color: var(--text-light); }

.section-subtitle {
    color: var(--text-light);
    margin: 10px auto 50px;
    max-width: 500px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 20px;
}

.icon-wrapper {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.feature-item h3 {
    font-size: 1.1rem;
    background: #718096;
    border-radius: 5px;
    padding: 7px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.feature-item p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.5;
}

@media (max-width: 480px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
}