/* Global resets and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: "Arial", sans-serif;
    line-height: 1.6;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Default card variables */
:root {
    --feature-card-bg: rgba(0,0,0,0.05);
    --recommend-card-bg: rgba(0,0,0,0.05);
    --card-border-color: rgba(0,0,0,0.1);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    text-decoration: underline;
}

/* Header styling */
header {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    z-index: 1000;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

header .logo h1 {
    margin: 0;
    font-size: 24px;
}

nav a {
    margin: 0 10px;
    font-weight: 600;
}

.theme-switcher {
    display: flex;
    align-items: center;
}

.theme-switcher label {
    margin-right: 5px;
    font-size: 14px;
}

.theme-switcher select {
    padding: 5px 10px;
    font-size: 14px;
}

/* Generic section styling */
.section {
    position: relative;
    padding: 80px 40px;
}

/* Hero section */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('images/hero.jpg');
    background-size: cover;
    background-position: center;
    text-align: center;
    box-shadow: inset 0 0 0 2000px rgba(0,0,0,0.4);
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #ffffff;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    color: #eeeeee;
}

.btn {
    display: inline-block;
    padding: 12px 25px;
    background-color: var(--accent-color);
    color: var(--bg-color);
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn:hover {
    filter: brightness(85%);
}

/* About section */
.about-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
}

.about-container img.book-cover {
    width: 100%;
    max-width: 300px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.about-container .about-text {
    flex: 1;
}

/* Features section */
.features {
    background-color: rgba(0,0,0,0.03);
}

.features h2 {
    text-align: center;
    margin-bottom: 40px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.feature {
    background-color: var(--feature-card-bg);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--card-border-color);
    backdrop-filter: blur(5px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.feature h3 {
    margin-bottom: 10px;
    font-size: 20px;
    color: var(--accent-color);
}

/* Gallery section */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.gallery-grid img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.2);
    transition: transform 0.3s ease;
}

.gallery-grid img:hover {
    transform: scale(1.05);
}

/* Testimonials */
.testimonials {
    background-color: rgba(0,0,0,0.03);
}

.testimonials h2 {
    text-align: center;
    margin-bottom: 30px;
}

.testimonial-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.testimonial-list blockquote {
    background-color: rgba(0,0,0,0.05);
    padding: 20px 30px;
    border-radius: 8px;
    position: relative;
    font-style: italic;
}

.testimonial-list cite {
    display: block;
    margin-top: 10px;
    font-style: normal;
    font-weight: bold;
    text-align: right;
}

/* Call to action */
.cta {
    text-align: center;
}

.cta h2 {
    margin-bottom: 15px;
    font-size: 32px;
}

.cta p {
    margin-bottom: 30px;
    font-size: 18px;
}

/* Price container in CTA */
.price-container {
    margin: 20px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: baseline;
    gap: 10px;
    font-size: 24px;
}
.price-old {
    text-decoration: line-through;
    opacity: 0.6;
    margin-right: 8px;
}
.price-new {
    font-weight: bold;
    color: var(--accent-color);
    font-size: 32px;
    margin-right: 8px;
}
.price-note {
    font-size: 14px;
    opacity: 0.8;
}

/* Recommended books */
.recommended {
    background-color: rgba(0,0,0,0.03);
}
.recommended h2 {
    text-align: center;
    margin-bottom: 30px;
}
.recommend-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); /* Было 220px, стало 110px */
    gap: 20px; /* Было 30px, стало 15px */
}
.recommend-item {
    background-color: var(--recommend-card-bg);
    border: 1px solid var(--card-border-color);
    padding: 15px;            /* Было 20px, стало 10px */
    border-radius: 6px;       /* Было 8px, стало 4px */
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    font-size: 1em;         /* Уменьшаем текст внутри карточки */
    align-items: center;
}
.recommend-item h3 {
    margin-bottom: 8px;       /* Было 10px, стало 6px */
    color: var(--accent-color);
    font-size: 1em;        /* Чуть меньше заголовок */
    text-align: center;
}

/* Recommended item image */
.recommend-img {
    width: 80px;              /* Было 100%/auto, теперь фиксированно */
    max-width: 80px;          /* Было 100%/auto, стало фиксированно */
    height: auto;
    margin-bottom: 10px;       /* Было 15px, стало 8px */
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.12);
    display: block;
}
.recommend-item p {
    flex-grow: 1;
    margin-bottom: 12px;      /* Было 15px, стало 10px */
    font-size: 1em;
    text-align: center;
}
.btn-secondary {
    display: inline-block;
    padding: 6px 12px;        /* Было 10px 20px, стало 6px 12px */
    border: 2px solid var(--accent-color);
    color: var(--accent-color);
    text-decoration: none;
    border-radius: 3px;       /* Было 4px, стало 3px */
    transition: all 0.3s ease;
    text-align: center;
    font-size: 12px;          /* Было 14px, стало 12px */
    margin-top: 6px;
}
.btn-secondary:hover {
    background-color: var(--accent-color);
    color: var(--bg-color);
}

/* Author section */
.author {
    background-color: rgba(0,0,0,0.03);
}
.author h2 {
    text-align: center;
    margin-bottom: 30px;
}
.author-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
}
.author-photo {
    width: 200px;
    max-width: 100%;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}
.author-text {
    flex: 1;
}
.author-text h3 {
    margin-bottom: 10px;
    font-size: 24px;
    color: var(--accent-color);
}

/* Sample section */
.sample h2 {
    text-align: center;
    margin-bottom: 30px;
}

/* Sample container styling */
.sample-container {
    max-height: 600px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    border: 1px solid rgba(0,0,0,0.1);
    padding: 10px;
}
.sample-container img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.15);
}

/* Footer */
.footer {
    background-color: rgba(0,0,0,0.05);
    text-align: center;
    padding: 20px 10px;
    font-size: 14px;
    /* Ensure the label is positioned relative to the footer */
    position: relative;
}

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

/* Label styling */
.label {
    position: absolute;
    top: 10px;
    left: 10px;
    padding: 4px 8px;
    font-size: 10px;
    font-weight: bold;
    background-color: var(--label-bg);
    color: var(--bg-color);
    border-radius: 3px;
    pointer-events: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    z-index: 1001;
}

/* Theme definitions using CSS variables */
.theme-white {
    --bg-color: #ffffff;
    --text-color: #222222;
    --accent-color: #c0392b;
    --label-bg: rgba(0,0,0,0.6);
    --feature-card-bg: rgba(0,0,0,0.05);
    --recommend-card-bg: rgba(0,0,0,0.05);
    --card-border-color: rgba(0,0,0,0.1);
}

.theme-dark {
    --bg-color: #121212;
    /* In dark mode all text and accents are golden */
    --text-color: #d4af37;
    --accent-color: #d4af37;
    --label-bg: rgba(255,255,255,0.2);
    --feature-card-bg: #1e1e1e;
    --recommend-card-bg: #1e1e1e;
    --card-border-color: #d4af37;
}

.theme-red {
    --bg-color: #8b1a1a;
    --text-color: #ffffff;
    --accent-color: #ffd700;
    --label-bg: rgba(255,255,255,0.2);
    --feature-card-bg: rgba(224,247,255,0.2);
    --recommend-card-bg: rgba(224,247,255,0.2);
    --card-border-color: rgba(255,255,255,0.3);
}

.theme-blue {
    --bg-color: #102a43;
    --text-color: #ffffff;
    --accent-color: #1f77ff;
    --label-bg: rgba(255,255,255,0.2);
    --feature-card-bg: rgba(255,229,229,0.2);
    --recommend-card-bg: rgba(255,229,229,0.2);
    --card-border-color: rgba(255,255,255,0.3);
}

.theme-yellow {
    --bg-color: #f6e58d;
    --text-color: #222222;
    --accent-color: #d35400;
    --label-bg: rgba(0,0,0,0.4);
    --feature-card-bg: rgba(0,0,0,0.05);
    --recommend-card-bg: rgba(0,0,0,0.05);
    --card-border-color: rgba(0,0,0,0.1);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        align-items: flex-start;
    }
    nav {
        margin-top: 10px;
    }
    .about-container {
        flex-direction: column;
    }
    .hero-content h2 {
        font-size: 36px;
    }
    .btn {
        font-size: 14px;
    }
}

/* Dark theme overrides for hero and buttons */
.theme-dark .hero-content h2,
.theme-dark .hero-content p {
    color: #d4af37;
}
.theme-dark .btn {
    background-color: #d4af37;
    color: #121212;
}
.theme-dark .btn:hover {
    filter: brightness(90%);
}
.theme-dark .btn-secondary {
    border-color: #d4af37;
    color: #d4af37;
}
.theme-dark .btn-secondary:hover {
    background-color: #d4af37;
    color: #121212;
}