:root {
    --primary: #4A90E2;
    --secondary: #00D2D3;
    --accent: #FF9F43;
    --purple: #5F27CD;
    --dark: #222F3E;
    --light: #F8F9FA;
    --white: #FFFFFF;
    --danger: #FF6B6B;
    --success: #1DD1A1;
    --gradient-main: linear-gradient(135deg, #4A90E2 0%, #00D2D3 100%);
    --gradient-accent: linear-gradient(135deg, #FF9F43 0%, #FF6B6B 100%);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

/* --- Landing Page Agressiva e Moderna --- */
.hero {
    background: var(--white);
    padding: 100px 20px 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(74,144,226,0.1) 0%, rgba(255,255,255,0) 70%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
    letter-spacing: -2px;
    line-height: 1.1;
}

.hero p {
    font-size: 1.4rem;
    color: #576574;
    margin-bottom: 40px;
    font-weight: 500;
}

.btn-cta {
    display: inline-block;
    background: var(--gradient-accent);
    color: var(--white);
    padding: 18px 50px;
    border: none;
    border-radius: 50px;
    font-size: 1.3rem;
    font-weight: 800;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(255, 159, 67, 0.4);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-cta:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 40px rgba(255, 159, 67, 0.6);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    border-top: 5px solid var(--primary);
    transition: transform 0.3s ease;
}

.feature-card:nth-child(2) { border-top-color: var(--secondary); }
.feature-card:nth-child(3) { border-top-color: var(--accent); }

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--dark);
}

/* --- Formulários de Auth --- */
.auth-container {
    max-width: 420px;
    margin: 60px auto;
    padding: 40px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.08);
    text-align: center;
}

.auth-container h2 {
    margin-bottom: 30px;
    color: var(--primary);
    font-size: 2rem;
}

.auth-container input {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: 2px solid #E1E8ED;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.auth-container input:focus {
    outline: none;
    border-color: var(--primary);
}

.auth-container button {
    width: 100%;
    padding: 15px;
    background: var(--gradient-main);
    color: var(--white);
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 10px;
    transition: opacity 0.3s;
}

.auth-container button:hover {
    opacity: 0.9;
}

.auth-link {
    display: block;
    margin-top: 20px;
    color: #576574;
    text-decoration: none;
    font-size: 0.95rem;
}

.auth-link:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* --- Footer --- */
.main-footer {
    margin-top