/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --primary-light: #e6f0ff;
    --accent: #00a3ff;
    --text: #1a2332;
    --text-secondary: #5a6a7a;
    --background: #ffffff;
    --background-alt: #f8fafc;
    --border: #e2e8f0;
    --success: #10b981;
    --gradient: linear-gradient(135deg, #0066cc 0%, #00a3ff 100%);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    background: var(--background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 48px;
    position: relative;
    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

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

.highlight {
    color: var(--primary);
}

/* Hero Section */
.hero {
    min-height: 50vh;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--background) 100%);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 650px;
    margin: 0 auto;
    padding: 60px 24px 120px;
    text-align: center;
    position: relative;
    z-index: 5;
}

.badge {
    display: inline-block;
    background: var(--gradient);
    color: white;
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 24px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

/* Signup Form */
.signup-form {
    max-width: 480px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 12px;
    background: white;
    padding: 8px;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0, 102, 204, 0.12), 0 1px 3px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border);
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.input-group:focus-within {
    border-color: var(--primary);
    box-shadow: 0 4px 32px rgba(0, 102, 204, 0.2), 0 0 0 3px var(--primary-light);
}

.input-group input {
    flex: 1;
    padding: 14px 20px;
    border: none;
    background: transparent;
    font-size: 1rem;
    color: var(--text);
    outline: none;
}

.input-group input::placeholder {
    color: #94a3b8;
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

.form-hint {
    margin-top: 16px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-message {
    display: none;
    margin-top: 20px;
    padding: 16px 24px;
    border-radius: 12px;
    font-weight: 500;
}

.success-message {
    background: #ecfdf5;
    color: var(--success);
}

.error-message {
    background: #fef2f2;
    color: #b91c1c;
}

.status-message:target {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Floating Cards */
.hero-visual {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
}

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 20px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    font-weight: 500;
    font-size: 0.9rem;
    animation: float 6s ease-in-out infinite;
}

.card-icon {
    font-size: 1.25rem;
}

.card-1 {
    top: 25%;
    left: 8%;
    animation-delay: 0s;
}

.card-2 {
    top: 40%;
    right: 10%;
    animation-delay: -2s;
}

.card-3 {
    bottom: 30%;
    left: 12%;
    animation-delay: -4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* About Planet Section */
.about-planet {
    padding: 10px 24px 80px;
    background: var(--background);
}

.about-card {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-icon {
    font-size: 4rem;
    margin-bottom: 24px;
}

.about-card h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text);
}

.about-card p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-card p strong {
    color: var(--primary);
}

.about-card p em {
    color: var(--text);
    font-style: normal;
    font-weight: 500;
}

/* Features Section */
.features {
    padding: 100px 24px;
    background: var(--background-alt);
}

.features h2 {
    text-align: center;
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 60px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    padding: 32px;
    background: var(--background-alt);
    border-radius: 20px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 102, 204, 0.1);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Submit Section */
.submit-section {
    padding: 80px 24px;
    background: var(--background-alt);
}

.submit-card {
    max-width: 700px;
    margin: 0 auto;
    background: var(--gradient);
    border-radius: 24px;
    padding: 60px 48px;
    text-align: center;
}

.submit-content h2 {
    color: white;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.submit-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 32px;
    line-height: 1.7;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 32px;
    background: white;
    color: var(--primary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Footer */
.footer {
    padding: 48px 24px;
    background: var(--background);
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-text a {
    color: var(--primary);
    text-decoration: none;
}

.footer-text a:hover {
    text-decoration: underline;
}

.footer-disclaimer {
    font-size: 0.8rem;
    color: #94a3b8;
    line-height: 1.6;
    max-width: 500px;
    margin: 8px auto 16px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
}

.footer-links a:hover {
    color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        padding: 20px 24px;
    }
    
    .hero-content {
        padding: 40px 20px 80px;
    }
    
    .input-group {
        flex-direction: column;
        padding: 12px;
    }
    
    .btn-primary {
        width: 100%;
        justify-content: center;
    }
    
    .floating-card {
        display: none;
    }
    
    .submit-card {
        padding: 40px 24px;
    }
    
    .features {
        padding: 60px 24px;
    }

    .about-planet {
        padding: 90px 24px 70px;
    }
}