/* === CSS Variables - SDK Color Scheme === */
:root {
    --sdk-green-primary: #4A7C59;
    --sdk-green-light: #8FBC5A;
    --sdk-orange-accent: #F5A623;
    --text-dark: #2C3E50;
    --text-light: #6C757D;
    --background-white: #FFFFFF;
    --background-light: #F8F9FA;
    --border-color: #E9ECEF;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-white);
}

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

/* === Header === */
header {
    background: linear-gradient(135deg, var(--sdk-green-primary) 0%, var(--sdk-green-light) 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
    box-shadow: var(--shadow);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: 0.5rem;
}

.subtitle-detail {
    font-size: 0.95rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
}

/* === Hero Section - Video === */
.hero {
    background-color: var(--background-light);
    padding: 3rem 0 2rem 0;
}

.video-container {
    max-width: 900px;
    margin: 0 auto;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    background-color: var(--background-white);
}

video {
    width: 100%;
    max-width: 320px; /* Smartphone-optimized size for vertical videos */
    height: auto;
    display: block;
    border-radius: 12px;
    margin: 0 auto; /* Center the video */
}

.video-placeholder {
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--text-light);
    border: 2px dashed var(--border-color);
}

video {
    width: 100%;
    height: auto;
    display: block;
}

/* === Greeting Section === */
.greeting {
    padding: 4rem 0;
    background: linear-gradient(135deg, #E8F5E9 0%, #F1F8E9 100%); /* Light SDK green gradient */
}

/* === Skills Section === */
.skills {
    padding: 4rem 0 2.5rem 0;
    background-color: #f8f9fa;
}

.skills h2 {
    color: var(--sdk-green-primary);
    font-size: 2rem;
    margin-bottom: 3rem;
    text-align: center;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-item {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    border-left: 5px solid var(--sdk-green-primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.skill-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 20px rgba(74, 124, 89, 0.2);
}

.skill-icon {
    font-size: 2rem;
    color: white;
    font-weight: bold;
    background: var(--sdk-green-primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.2rem;
}

.skill-item h3 {
    color: var(--sdk-green-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.4;
}

.skill-item p {
    color: var(--text-dark);
    font-size: 0.95rem;
    line-height: 1.7;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.text-content h2 {
    color: var(--sdk-green-primary);
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.text-content p {
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

.profile-photo {
    width: 100%;
    max-width: 300px;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
}

/* === Quote Section === */
.quote-section {
    background: linear-gradient(135deg, var(--sdk-green-primary) 0%, #3a6249 100%);
    color: white;
    padding: 1.5rem 0;
    position: relative;
}

.quote-section::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 8rem;
    opacity: 0.08;
    font-family: Georgia, serif;
}

.featured-quote {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.quote-text {
    font-size: 1.5rem;
    font-style: italic;
    line-height: 1.8;
    margin-bottom: 1rem;
    font-family: Georgia, serif;
}

.quote-author {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0.5rem 0;
    padding: 0.8rem 2rem;
    background-color: rgba(44, 62, 80, 0.8);
    color: var(--sdk-orange-accent);
    display: inline-block;
    border-radius: 4px;
}

.quote-translation {
    font-size: 1rem;
    opacity: 0.9;
    font-style: italic;
    margin-top: 0.5rem;
}

/* === CTA Section === */
.cta {
    padding: 2.5rem 0 4rem 0;
    background-color: #f8f9fa;
    text-align: center;
}

.cta h3 {
    font-size: 2rem;
    color: var(--sdk-green-primary);
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
}

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.9rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

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

.btn-primary:hover {
    background-color: #3a6249;
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: white;
    color: var(--sdk-green-primary);
    border: 2px solid var(--sdk-green-primary);
}

.btn-secondary:hover {
    background-color: var(--sdk-green-primary);
    color: white;
    transform: translateY(-2px);
}

/* === Footer === */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    max-width: 900px;
    margin: 0 auto;
}

.disclaimer {
    margin-bottom: 2rem;
    line-height: 1.7;
}

.disclaimer h4 {
    color: var(--sdk-green-light);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.disclaimer p {
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

.footer-info {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.9rem;
}

.footer-info p {
    margin: 0.3rem 0;
}

/* === Responsive Design === */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .photo-content {
        text-align: center;
    }

    .profile-photo {
        max-width: 250px;
    }

    .text-content h2 {
        font-size: 1.6rem;
    }

    .quote-text {
        font-size: 1.2rem;
    }

    .cta h3 {
        font-size: 1.6rem;
    }

    .button-group {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .skill-item {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 2rem 0;
    }

    header h1 {
        font-size: 1.7rem;
    }

    .hero,
    .greeting,
    .quote-section,
    .cta {
        padding: 2.5rem 0;
    }

    .quote-text {
        font-size: 1.1rem;
    }
}