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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) 0;
    overflow: hidden;
}

.hero__background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(217, 74, 46, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(61, 255, 143, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-bg-dark) 0%, var(--color-bg-medium) 100%);
    z-index: -2;
}

.hero__background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255, 255, 255, 0.02) 2px, rgba(255, 255, 255, 0.02) 4px);
    z-index: -1;
}

.hero__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, transparent 0%, var(--color-bg-dark) 100%);
}

.hero__container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero__content {
    z-index: 1;
}

.hero__title {
    margin-bottom: var(--spacing-xl);
}

.hero__title-main {
    display: block;
    font-size: var(--font-size-6xl);
    color: var(--color-primary);
    text-shadow: 0 0 30px rgba(217, 74, 46, 0.5);
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.hero__title-sub {
    display: block;
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-normal);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.hero__tagline {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: var(--line-height-relaxed);
}

.hero__tagline strong {
    color: var(--color-accent);
    font-style: italic;
}

.hero__cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero__book {
    position: relative;
    z-index: 1;
}

.hero__book-img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.8));
    animation: float 6s ease-in-out infinite;
}

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

.hero__scroll {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.hero__scroll-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-muted);
    transition: color var(--transition-normal);
}

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

.hero__scroll-text {
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero__scroll-icon {
    font-size: var(--font-size-2xl);
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ==================================
   SINOPSIS SECTION
   ================================== */

.sinopsis {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-medium);
    position: relative;
}

.sinopsis::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}

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

.sinopsis__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.sinopsis__intro {
    font-size: var(--font-size-lg);
    font-family: var(--font-primary);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-lg);
}

.sinopsis__text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.sinopsis__highlight {
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    font-style: italic;
    color: var(--color-accent);
    margin-top: var(--spacing-xl);
    padding-left: var(--spacing-lg);
    border-left: 3px solid var(--color-accent);
}

.sinopsis__features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.feature {
    background-color: var(--color-bg-light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: all var(--transition-normal);
}

.feature:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.feature__icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
}

.feature__title {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.feature__text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

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

.book-details {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-dark);
}

.book-details__grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.book-details__cover {
    position: relative;
}

.book-details__cover-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-slow);
}

.book-details__cover:hover .book-details__cover-img {
    transform: scale(1.05);
}

.book-specs {
    margin: var(--spacing-xl) 0;
}

.book-specs__item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.book-specs__item:last-child {
    border-bottom: none;
}

.book-specs__label {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.book-specs__value {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

.book-details__cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-xl);
}

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

.author-teaser {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-bg-medium) 0%, var(--color-bg-dark) 100%);
    position: relative;
}

.author-teaser::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="%23d94a2e" opacity="0.1"/></svg>');
    opacity: 0.5;
}

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

.author-teaser__text p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.author-teaser__text p:last-of-type {
    color: var(--color-text-primary);
    font-style: italic;
    margin-bottom: var(--spacing-xl);
}

/* ==================================
   NEWSLETTER SECTION
   ================================== */

.newsletter {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-medium);
    position: relative;
}

.newsletter::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.newsletter__content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.newsletter__text {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

.newsletter__form {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.newsletter__input {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-bg-light);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.newsletter__input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow-green);
}

.newsletter__privacy {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin: 0;
}

/* ==================================
   BUY SECTION
   ================================== */

.buy {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-dark);
}

.buy__options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.buy__option {
    background-color: var(--color-bg-medium);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
}

.buy__option:hover:not(.buy__option--coming) {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-5px);
}

.buy__option--coming {
    opacity: 0.6;
}

.buy__option-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.buy__option-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.buy__option-price {
    margin: 0;
}

.buy__option-price-amount {
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.buy__option-coming {
    font-size: var(--font-size-xl);
    color: var(--color-text-muted);
    font-style: italic;
}

.buy__option-features {
    list-style: none;
    margin-bottom: var(--spacing-xl);
    flex: 1;
}

.buy__option-features li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
}

.buy__option-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: var(--font-weight-bold);
}

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

.footer {
    background-color: var(--color-bg-medium);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer__title {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.footer__text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

.footer__links,
.footer__social {
    list-style: none;
}

.footer__links li,
.footer__social li {
    margin-bottom: var(--spacing-sm);
}

.footer__links a,
.footer__social a {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer__links a:hover,
.footer__social a:hover {
    color: var(--color-primary);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer__bottom p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* ==================================
   RESPONSIVE - TABLET & MOBILE
   ================================== */

@media (max-width: 968px) {
    .hero__container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .hero__content {
        text-align: center;
    }
    
    .hero__cta {
        justify-content: center;
    }
    
    .book-details__grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: calc(60px + var(--spacing-xl)) 0 var(--spacing-xl);
    }
    
    .hero__title-main {
        font-size: var(--font-size-4xl);
    }
    
    .hero__title-sub {
        font-size: var(--font-size-base);
    }
    
    .hero__tagline {
        font-size: var(--font-size-base);
    }
    
    .sinopsis__features {
        grid-template-columns: 1fr;
    }
    
    .newsletter__form {
        flex-direction: column;
    }
    
    .buy__options {
        grid-template-columns: 1fr;
    }
    
    .book-specs__item {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
}