/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-section h2 {
    font-size: 3em;
    font-weight: 800;
    margin-bottom: 30px;
    line-height: 1.2;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    color: white;
}

.highlight-yellow {
    color: var(--secondary-color);
    text-shadow: 0 2px 10px rgba(252, 215, 105, 0.5);
}

.hero-intro {
    font-size: 1.3em;
    line-height: 1.7;
    margin-bottom: 40px;
    opacity: 0.95;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    color: white;
}

.hero-features {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    margin: 50px auto;
    max-width: 800px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-features h3 {
    font-size: 1.5em;
    margin-bottom: 25px;
    font-weight: 700;
    color: white;
}

.hero-features ul {
    list-style: none;
    padding: 0;
    text-align: left;
    max-width: 700px;
    margin: 0 auto;
}

.hero-features li {
    font-size: 1.15em;
    line-height: 1.6;
    margin-bottom: 20px;
    padding-left: 40px;
    position: relative;
    color: white;
}

.hero-features li:before {
    content: "✨";
    position: absolute;
    left: 0;
    font-size: 1.3em;
}

.cta-box {
    margin-top: 50px;
}

.cta-text {
    font-size: 1.2em;
    font-weight: 600;
    margin-top: 18px;
    color: white;
}

.cta-button {
    display: inline-block;
    padding: 18px 50px;
    font-size: 1.2em;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.cta-button.primary {
    background: var(--secondary-color);
    color: var(--text-primary);
}

.cta-button.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(252, 215, 105, 0.5);
    background: var(--secondary-hover);
}

.cta-button.secondary {
    background: var(--primary-color);
    color: white;
}

.cta-button.secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(132, 77, 255, 0.4);
    background: var(--primary-hover);
}

.cta-button.large {
    font-size: 1.4em;
    padding: 22px 60px;
}

/* Problem Section */
.problem-section {
    background: #ffffff;
    color: var(--text-primary);
    padding: 100px 20px;
    text-align: center;
    position: relative;
}

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

.problem-section h2 {
    font-size: 2.8em;
    font-weight: 800;
    margin-bottom: 30px;
    text-shadow: none;
    color: var(--text-primary);
}

.problem-intro {
    font-size: 1.4em;
    line-height: 1.6;
    margin-bottom: 60px;
    font-weight: 500;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-secondary);
}

.problems-two-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1100px;
    margin: 0 auto;
    align-items: stretch;
}

.problems-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.problem-item-interactive {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 25px;
    border-radius: 12px;
    background: #ffffff;
    border: 2px solid transparent;
    transition: all 0.3s ease;
    cursor: pointer;
}

.problem-item-interactive:hover {
    border-color: var(--primary-color);
    background: var(--bg-purple-light);
    transform: translateX(5px);
}

.problem-number {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5em;
    font-weight: 700;
}

.problem-content-inline h4 {
    font-size: 1.3em;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
    text-align: left;
}

.problem-content-inline p {
    font-size: 1em;
    line-height: 1.5;
    color: var(--text-secondary);
    margin: 0;
    text-align: left;
}

.problems-detail {
    position: relative;
    background: var(--bg-purple-light);
    border-radius: 20px;
    padding: 50px 40px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--primary-border-alpha);
}

.problem-detail-content {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.problem-detail-content.active {
    display: block;
    opacity: 1;
}

.problem-detail-content p {
    font-size: 1.4em;
    line-height: 1.8;
    color: var(--text-primary);
    font-style: italic;
    margin: 0;
    text-align: center;
}

/* Solution Section */
.solution-section {
    background: var(--primary-lighter);
    color: var(--text-primary);
    padding: 100px 20px 150px;
    text-align: center;
    position: relative;
    overflow: visible;
}

.solution-section::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    height: 80px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 120' preserveAspectRatio='none'%3E%3Cpath fill='%23ffffff' d='M0,0 L0,40 Q360,100 720,40 T1440,40 L1440,0 Z'%3E%3C/path%3E%3C/svg%3E");
    background-size: 100% 100%;
    background-repeat: no-repeat;
    z-index: 1;
}

.solution-section::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 80px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 120' preserveAspectRatio='none'%3E%3Cpath fill='%23ffffff' d='M0,120 L0,80 Q360,20 720,80 T1440,80 L1440,120 Z'%3E%3C/path%3E%3C/svg%3E");
    background-size: 100% 100%;
    background-repeat: no-repeat;
    z-index: 1;
}

.solution-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.solution-section h2 {
    font-size: 2.8em;
    font-weight: 800;
    margin-bottom: 30px;
    padding-top: 40px;
    text-shadow: none;
    color: var(--text-primary);
}

.solution-intro {
    font-size: 1.4em;
    line-height: 1.6;
    margin-bottom: 60px;
    font-weight: 500;
    color: var(--text-secondary);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.benefit-card {
    background: transparent;
    padding: 20px;
    transition: all 0.3s ease;
    text-align: center;
}

.benefit-card:hover {
    transform: translateY(-5px);
}

.benefit-image {
    width: 120px;
    height: 120px;
    margin: 0 auto 25px;
    display: block;
    object-fit: contain;
}

.benefit-icon {
    font-size: 4.5em;
    margin-bottom: 25px;
    display: block;
}

.benefit-card h3 {
    font-size: 1.2em;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.benefit-card p {
    font-size: 0.95em;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Letter Section */
.letter-section {
    background: #ffffff;
    color: var(--text-primary);
    padding: 100px 20px;
}

.letter-container {
    max-width: 900px;
    margin: 0 auto;
}

.letter-section h2 {
    font-size: 2.8em;
    font-weight: 800;
    margin-bottom: 50px;
    text-align: center;
    text-shadow: none;
    color: var(--text-primary);
}

.letter-content {
    background: var(--bg-purple-light);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 60px;
    border: 1px solid var(--primary-border-alpha);
    margin-bottom: 60px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.letter-content p {
    font-size: 1.2em;
    line-height: 1.8;
    margin-bottom: 25px;
    text-align: left;
    color: var(--text-secondary);
}

.letter-content p.closing {
    font-size: 1.3em;
    font-weight: 600;
    margin-top: 40px;
    text-align: center;
    color: var(--text-primary);
}

.signature {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 25px;
    margin-top: 50px;
    padding-top: 30px;
}

.signature-image {
    width: 300px;
    height: 300px;
    object-fit: cover;
}

.signature-text {
    text-align: left;
}

.signature-built {
    font-size: 1em;
    font-weight: 400;
    font-style: italic;
    margin: 0 0 50px 0 !important;
    color: var(--text-secondary);
}

.signature-name {
    font-size: 1.2em;
    font-weight: 700;
    margin: 0 0 2px 0 !important;
    color: var(--text-primary);
    line-height: 1.2;
}

.signature-title {
    font-size: 0.95em;
    font-weight: 400;
    margin: 0 !important;
    color: var(--text-secondary);
    line-height: 1.2;
}

.final-cta {
    text-align: center;
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-section h2 {
        font-size: 2.2em;
    }
    
    .hero-intro {
        font-size: 1.1em;
    }
    
    .hero-features {
        padding: 30px 20px;
    }
    
    .hero-features h3 {
        font-size: 1.3em;
    }
    
    .hero-features li {
        font-size: 1em;
    }
    
    .problem-section h2,
    .solution-section h2,
    .letter-section h2 {
        font-size: 2em;
    }
    
    .problems-two-column {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .problems-detail {
        display: none;
    }
    
    .problem-item-interactive {
        cursor: default;
    }
    
    .problem-item-interactive:hover {
        transform: none;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .problem-item,
    .benefit-card {
        padding: 30px 25px;
    }
    
    .problem-icon,
    .benefit-icon {
        font-size: 3em;
    }
    
    .problem-intro,
    .solution-intro {
        font-size: 1.1em;
    }
    
    .letter-content {
        padding: 40px 30px;
    }
    
    .letter-content p {
        font-size: 1.05em;
    }
    
    .signature {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .signature-text {
        text-align: center;
    }
    
    .signature-image {
        width: 150px;
        height: 150px;
    }
    
    .cta-button {
        padding: 15px 35px;
        font-size: 1em;
    }
    
    .cta-button.large {
        font-size: 1.2em;
        padding: 18px 45px;
    }
    
    .hero-section,
    .problem-section,
    .solution-section,
    .letter-section {
        padding: 60px 20px;
    }
}

@media (max-width: 480px) {
    .hero-section h2 {
        font-size: 1.8em;
    }
    
    .problem-section h2,
    .solution-section h2,
    .letter-section h2 {
        font-size: 1.6em;
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .problem-number {
        width: 40px;
        height: 40px;
        font-size: 1.2em;
    }
    
    .problem-content-inline h4 {
        font-size: 1.1em;
    }
    
    .problem-content-inline p {
        font-size: 0.9em;
    }
    
    .hero-features {
        padding: 25px 15px;
    }
    
    .hero-features li {
        font-size: 0.95em;
        padding-left: 35px;
    }
    
    .letter-content {
        padding: 30px 20px;
    }
    
    .letter-content p {
        font-size: 1em;
    }
    
    .signature {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .signature-text {
        text-align: center;
    }
    
    .signature-image {
        width: 100px;
        height: 100px;
    }
    
    .signature-built {
        font-size: 0.9em;
    }
    
    .signature-name {
        font-size: 1.1em;
    }
    
    .signature-title {
        font-size: 0.85em;
    }
    
    .cta-button {
        padding: 12px 28px;
        font-size: 0.95em;
    }
    
    .cta-button.large {
        font-size: 1.1em;
        padding: 15px 35px;
    }
}