body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #ff6b6b;
}

.nav-buttons {
    display: flex;
    gap: 15px;
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
}

.hero-content {
    text-align: center;
    padding: 80px 20px;
    color: white;
}

.hero-content h1 {
    font-size: 56px;
    margin: 0 0 20px 0;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.tagline {
    font-size: 24px;
    margin: 0 0 40px 0;
    opacity: 0.95;
}

.cta-section {
    margin-top: 40px;
}

.signup-hint {
    margin-top: 15px;
    font-size: 14px;
    opacity: 0.9;
}

/* Features */
.features {
    display: flex;
    justify-content: center;
    gap: 60px;
    padding: 60px 20px;
    flex-wrap: wrap;
}

.feature {
    text-align: center;
    max-width: 300px;
    color: white;
}

.feature-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.feature h3 {
    font-size: 24px;
    margin: 0 0 10px 0;
}

.feature p {
    opacity: 0.9;
    font-size: 16px;
}

/* Buttons */
.btn-primary {
    background: #ff6b6b;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    background: #ff5252;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #333;
    border: 2px solid #333;
    padding: 10px 28px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: #333;
    color: white;
}

.btn-large {
    padding: 18px 50px;
    font-size: 20px;
}

.btn-block {
    width: 100%;
    padding: 14px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 40px;
    border-radius: 20px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: slideIn 0.3s;
}

@keyframes slideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: #aaa;
    float: right;
    font-size: 32px;
    font-weight: bold;
    cursor: pointer;
    line-height: 20px;
}

.close:hover {
    color: #000;
}

.modal-content h2 {
    margin: 0 0 10px 0;
    color: #ff6b6b;
    font-size: 32px;
}

.modal-subtitle {
    color: #666;
    margin: 0 0 30px 0;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 16px;
    transition: border-color 0.3s;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: #ff6b6b;
}

.form-group.checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
}

.form-group.checkbox input {
    width: auto;
}

.form-group.checkbox label {
    margin: 0;
    font-weight: normal;
    font-size: 14px;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
}

.forgot-password {
    color: #ff6b6b;
    text-decoration: none;
    font-size: 14px;
}

.forgot-password:hover {
    text-decoration: underline;
}

.switch-form {
    text-align: center;
    margin-top: 20px;
    color: #666;
}

.switch-form a {
    color: #ff6b6b;
    text-decoration: none;
    font-weight: 600;
}

.switch-form a:hover {
    text-decoration: underline;
}

/* Messages */
.error-message {
    color: #d32f2f;
    background: #ffebee;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    display: none;
    font-size: 14px;
}

.error-message.show {
    display: block;
}

.success-message {
    color: #388e3c;
    background: #e8f5e9;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    display: none;
    font-size: 14px;
}

.success-message.show {
    display: block;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
    }

    .hero-content h1 {
        font-size: 36px;
    }

    .tagline {
        font-size: 18px;
    }

    .features {
        gap: 40px;
    }

    .modal-content {
        margin: 10% auto;
        padding: 30px 20px;
    }
}