@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=Poppins:wght@400;500;600;700&display=swap');

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

:root {
    --primary-color: #1a1a2e;
    --secondary-color: #0f3460;
    --accent-color: #00d4ff;
    --accent-orange: #ff6b35;
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #2a2a3e;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #252540 100%);
    background-attachment: fixed;
    background-size: 100% 100vh;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    font-weight: 400;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    letter-spacing: -0.5px;
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
    max-width: 98%;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 30, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: center;
    align-items: center;
}

#about p a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
}

#about p a:hover{
    color: var(--accent-orange);
}


.nav-brand {
    font-size: 1rem;
    font-weight: 600;
    padding: 10px 24px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--accent-color);
}

@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 6px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, #00a8cc 100%);
    color: #000;
    border-color: var(--accent-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-color);
    border-color: var(--accent-color);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 48px;
    font-size: 1.1rem;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    padding: 20px 0;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 60px;
}

.hero-text {
    max-width: 800px;
    width: 100%;
}

.hero-text h1 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text .tagline {
    font-size: 1.2rem;
    color: var(--accent-orange);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-text .description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.3;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.book-cover {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.2);
    transition: var(--transition);
}

.book-cover:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(0, 212, 255, 0.3);
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-text .tagline {
        font-size: 1.2rem;
    }

    .hero {
        padding: 40px 0;
        min-height: auto;
    }
}

@media (max-width: 768px) {
    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-text .tagline {
        font-size: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   BOOK SECTION
   ============================================ */

.book-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(15, 52, 96, 0.3) 0%, rgba(15, 15, 30, 0.5) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.book-section h2 {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.book-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
    align-items: flex-start;
}

.book-info h3 {
    font-size: 1.8rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.book-info p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.3;
}

.features-list {
    list-style: none;
    margin: 1.5rem 0;
}

.features-list li {
    padding: 0.4rem 0;
    padding-left: 2rem;
    color: var(--text-secondary);
    position: relative;
    display: flex;
    align-items: center;
}

.features-list li:before {
    content: "▸";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-orange);
    font-size: 1.3rem;
    line-height: 1;
}

.book-cover-large {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.2);
}

.highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.highlight-card {
    padding: 2rem;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.highlight-card:hover {
    border-color: var(--accent-color);
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-5px);
}

.highlight-card h4 {
    font-size: 1.2rem;
    color: var(--accent-orange);
    margin-bottom: 1rem;
}

.highlight-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

@media (max-width: 1024px) {
    .book-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .highlights {
        grid-template-columns: 1fr;
    }

    .book-section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .book-section {
        padding: 60px 0;
    }

    .book-section h2 {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }
}

/* ============================================
   CONCEPTS SECTION
   ============================================ */

.concepts-section {
    padding: 100px 0;
    text-align: center;
}

.concepts-section h2 {
    font-size: 2.5rem;
    margin-bottom: 4rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.concepts-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 3rem;
}

.concept {
    padding: 2.5rem;
    background: rgba(15, 52, 96, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.concept:hover {
    border-color: var(--accent-color);
    background: rgba(0, 212, 255, 0.1);
    transform: translateY(-5px);
}

.concept-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.concept h3 {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.concept p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.concept.arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--accent-orange);
    background: transparent;
    border: none;
    padding: 0;
}

.concepts-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

@media (max-width: 1024px) {
    .concepts-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .concept.arrow {
        transform: rotate(90deg);
    }

    .concepts-section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .concepts-section {
        padding: 60px 0;
    }

    .concepts-section h2 {
        font-size: 1.5rem;
    }
}

/* ============================================
   AUTHOR SECTION
   ============================================ */

.author-section {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(15, 52, 96, 0.3) 0%, rgba(15, 15, 30, 0.5) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.author-section h2 {
    font-size: 2.5rem;
    margin-bottom: 0rem;
    text-align: center;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.author-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: flex-start;
}

.author-image {
    text-align: center;
}

.author-photo {
    width: 100%;
    max-width: 400px;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 212, 255, 0.2);
    border: 2px solid var(--accent-color);
    margin-top:20px;
}

.author-bio h3 {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 0.1rem;
}

.author-title {
    font-size: 1.1rem;
    color: var(--accent-orange);
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.author-bio p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.3;
    font-size: 1.05rem;
}

.author-highlights {
    list-style: none;
    margin: 1.5rem 0;
}

.author-highlights li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    color: var(--text-secondary);
    position: relative;
}

.author-highlights li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-orange);
    font-weight: bold;
    font-size: 1.2rem;
}

@media (max-width: 1024px) {
    .author-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .author-section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .author-section {
        padding: 60px 0;
    }

    .author-section h2 {
        font-size: 1.5rem;
    }

    .author-bio h3 {
        font-size: 1.5rem;
    }
}

/* ============================================
   TESTIMONIAL BANNER
   ============================================ */

.testimonial-banner {
    padding: 60px 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(255, 107, 53, 0.08) 100%);
    border-top: 2px solid var(--accent-color);
    border-bottom: 2px solid var(--accent-orange);
}

.featured-quote {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.featured-quote p {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-style: italic;
}

.featured-quote cite {
    font-size: 1rem;
    color: var(--accent-orange);
    font-style: normal;
    font-weight: 600;
}

@media (max-width: 768px) {
    .testimonial-banner {
        padding: 40px 0;
    }

    .featured-quote p {
        font-size: 1.2rem;
    }

    .featured-quote cite {
        font-size: 0.9rem;
    }
}

/* ============================================
   QUOTE SECTION
   ============================================ */

.quote-section {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05) 0%, rgba(255, 107, 53, 0.05) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

blockquote {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

blockquote p {
    font-size: 1.8rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-style: italic;
}

blockquote cite {
    font-size: 1.1rem;
    color: var(--accent-orange);
    font-style: normal;
    font-weight: 600;
}

@media (max-width: 768px) {
    .quote-section {
        padding: 60px 0;
    }

    blockquote p {
        font-size: 1.3rem;
    }
}

/* ============================================
   CTA SECTION
   ============================================ */

.cta-section {
    padding: 80px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}


.cta-section p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 0rem;
}

.cta-section em {
    color: var(--accent-orange);
    font-style: normal;
}

@media (max-width: 768px) {
    .cta-section {
        padding: 60px 0;
    }

    .cta-section h2 {
        font-size: 1.8rem;
    }

    .cta-section p {
        font-size: 1rem;
    }
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: linear-gradient(135deg, #0f0f1e 0%, #1a1a2e 100%);
    border-top: 1px solid var(--border-color);
    padding: 0px 0 20px 0;
    color: var(--text-secondary);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 1.1rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.footer-section p {
    line-height: 1.8;
    font-size: 0.95rem;
}

.footer-section a {
    color: var(--accent-orange);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

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

.mt-3 {
    margin-top: 3rem;
}

.mb-3 {
    margin-bottom: 3rem;
}