/* RESET */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* VARIABLES */
:root {
    --primary: #1e3a8a;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --secondary: #10b981;
    --text: #1f2937;
    --text-light: #6b7280;
    --bg: #f9fafb;
    --white: #ffffff;
    --border: #e5e7eb;
}

/* BASE */
body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* HEADER */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--primary);
}

.nav-link-cta {
    background: var(--primary);
    color: var(--white);
    padding: 10px 20px;
    border-radius: 8px;
}

.nav-link-cta:hover {
    background: var(--primary-dark);
    color: var(--white);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text);
}

/* HERO */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #60a5fa 100%);
    color: var(--white);
    padding: 150px 0 100px;
    text-align: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn {
    padding: 15px 30px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: var(--white);
    color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

.hero-scroll {
    margin-top: 60px;
}

.hero-scroll span {
    display: block;
    width: 2px;
    height: 40px;
    background: rgba(255, 255, 255, 0.5);
    margin: 0 auto;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* SECTIONS */
.section {
    padding: 80px 0;
}

.section-header {
    margin-bottom: 50px;
}

.section-header-center {
    text-align: center;
}

.section-tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 10px;
}

.section-intro {
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* CARDS */
.cards-grid {
    display: grid;
    gap: 30px;
}

.cards-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.cards-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
}

.card-text {
    color: var(--text-light);
    margin-bottom: 20px;
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.card-link:hover {
    color: var(--primary-dark);
}

.card-highlight {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border: 2px solid var(--primary-light);
}

/* PREMIUM */
.section-premium {
    background: var(--primary);
    color: var(--white);
}

.premium-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 50px;
    max-width: 600px;
    margin: 0 auto;
}

.premium-card-content {
    text-align: center;
}

.premium-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.premium-subtitle {
    opacity: 0.9;
    margin-bottom: 30px;
}

.premium-details {
    display: grid;
    gap: 15px;
    margin-bottom: 30px;
}

.premium-detail {
    display: flex;
    justify-content: space-between;
    padding: 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.premium-detail-label {
    font-weight: 500;
}

.premium-detail-value {
    font-weight: 700;
}

/* FOOTER */
.footer {
    background: var(--text);
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-tagline {
    display: block;
    font-size: 0.875rem;
    opacity: 0.7;
    margin-top: 5px;
}

.footer-links {
    display: flex;
    gap: 20px;
}

.footer-link {
    color: var(--white);
    text-decoration: none;
    opacity: 0.7;
}

.footer-link:hover {
    opacity: 1;
}

.footer-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.875rem;
    opacity: 0.7;
}

/* FOOTER DISCLAIMER BANNER */
.footer-disclaimer {
    background: #1e293b;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 0;
    text-align: center;
}

.footer-disclaimer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.5;
}

.footer-disclaimer-content strong {
    color: #fbbf24;
}

/* GUIDE CONTENT */
.guide-content {
    max-width: 800px;
    margin: 0 auto;
}

.back-link {
    display: inline-block;
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    margin-bottom: 30px;
}

.back-link:hover {
    color: var(--primary-dark);
}

.guide-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 15px;
}

.guide-intro {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

.guide-section {
    margin-bottom: 40px;
    padding: 30px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.guide-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text);
}

.guide-section ul {
    list-style: none;
    padding-left: 0;
}

.guide-section ul li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
}

.guide-section ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.guide-note {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
}

.guide-cta {
    background: var(--primary);
    color: var(--white);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    margin-top: 40px;
}

.guide-cta-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

/* DISCLAIMER BANNER */
.disclaimer-banner {
    background: #fff3cd;
    border: 2px solid #ffc107;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.disclaimer-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.disclaimer-content {
    font-size: 0.95rem;
    color: #856404;
    line-height: 1.5;
}

.disclaimer-content strong {
    color: #dc3545;
}

/* LETTER CONTENT */
.letter-content {
    max-width: 800px;
    margin: 0 auto;
}

.letter-box {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border);
    margin-bottom: 30px;
}

.letter-header,
.letter-recipient {
    margin-bottom: 20px;
}

.letter-spacer {
    height: 30px;
}

.letter-body {
    line-height: 1.8;
}

.letter-body ul {
    list-style: none;
    padding-left: 0;
    margin: 15px 0;
}

.letter-body ul li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.letter-body ul li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.letter-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.letter-actions button {
    flex: 1;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .cards-grid-2,
    .cards-grid-3 {
        grid-template-columns: 1fr;
    }
    
    .footer-inner {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 10px;
    }
    
    .guide-title,
    .letter-title {
        font-size: 2rem;
    }
    
    .letter-actions {
        flex-direction: column;
    }
}