/**
 * Modern Clean Template
 * Light colors, white background, red buttons
 */

/* Reset & Variables */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #eeeeee;
    --gray-300: #e0e0e0;
    --gray-400: #bdbdbd;
    --gray-500: #9e9e9e;
    --gray-600: #757575;
    --gray-700: #616161;
    --gray-800: #424242;
    --gray-900: #212121;
    
    --red-500: #ef4444;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    
    --green-500: #22c55e;
    --green-600: #16a34a;
    
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    
    --yellow-400: #facc15;
    --yellow-500: #eab308;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    
    --radius: 8px;
    --radius-lg: 12px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: var(--blue-600);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--blue-500);
}

img {
    max-width: 100%;
    height: auto;
}

/* Header */
.site-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo img {
    width: 300px;
    height: 100px;
    object-fit: contain;
}

/* Navigation */
.main-nav {
    position: relative;
}

.nav-dropdown {
    position: relative;
}

.nav-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-toggle:hover {
    background: var(--gray-200);
}

.nav-toggle svg {
    transition: transform 0.2s ease;
}

.nav-dropdown.open .nav-toggle svg {
    transform: rotate(180deg);
}

.nav-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
}

.nav-dropdown.open .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-menu li {
    border-bottom: 1px solid var(--gray-100);
}

.nav-menu li:last-child {
    border-bottom: none;
}

.nav-menu a {
    display: block;
    padding: 12px 16px;
    color: var(--gray-700);
    font-size: 0.95rem;
    transition: background 0.2s ease;
}

.nav-menu a:hover {
    background: var(--gray-50);
    color: var(--gray-900);
}

/* Main */
.site-main {
    min-height: calc(100vh - 200px);
    padding: 48px 0 64px;
}

/* Page Hero */
.page-hero {
    margin-bottom: 48px;
}

.page-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 16px;
}

.page-headline {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 720px;
    margin-bottom: 24px;
}

/* Author Bar */
.author-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
    padding: 20px 24px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.author-block {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--white);
    box-shadow: var(--shadow);
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-label,
.date-label,
.lang-label {
    font-size: 0.75rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
}

.author-link {
    color: inherit;
}

.author-link:hover .author-name {
    color: var(--blue-600);
}

.update-date time {
    font-weight: 500;
    color: var(--gray-700);
}

.lang-versions {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.lang-links {
    display: flex;
    gap: 6px;
}

.lang-link {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--gray-600);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: 4px;
    transition: all 0.2s ease;
}

.lang-link:hover {
    border-color: var(--blue-500);
    color: var(--blue-600);
}

.lang-link.active {
    background: var(--gray-800);
    border-color: var(--gray-800);
    color: var(--white);
}

/* Product Cards */
.rating-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 48px;
}

.product-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: box-shadow 0.2s ease;
}

.product-card:hover {
    box-shadow: var(--shadow-md);
}

.product-row {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-100);
}

.product-row:last-child {
    border-bottom: none;
}

/* Product Header */
.product-header {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--gray-50);
}

.product-logo {
    flex-shrink: 0;
    width: 120px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.product-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.product-title {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.product-title-top {
    display: flex;
    align-items: center;
    gap: 16px;
}

.product-rank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--red-500);
    color: var(--white);
    font-size: 1rem;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}

.product-title h2 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.product-slogan {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--blue-600);
    font-style: italic;
    margin: 0;
    padding-left: 56px;
}

.product-rating {
    flex-shrink: 0;
    align-self: flex-start;
    padding-top: 4px;
}

.stars {
    display: flex;
    gap: 2px;
}

.star {
    fill: var(--gray-300);
}

.star.filled {
    fill: var(--yellow-400);
}

/* Product Description */
.product-description p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* Pros & Cons */
.product-proscons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.pros-list h4,
.cons-list h4 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.pros-list h4 {
    color: var(--green-600);
}

.cons-list h4 {
    color: var(--red-600);
}

.pros-list ul,
.cons-list ul {
    list-style: none;
}

.pros-list li,
.cons-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: 0.95rem;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
}

.pros-list li:last-child,
.cons-list li:last-child {
    border-bottom: none;
}

.icon-check {
    color: var(--green-500);
    font-weight: bold;
}

.icon-cross {
    color: var(--red-500);
    font-weight: bold;
}

/* Product Action */
.product-action {
    text-align: center;
    padding: 24px;
    background: var(--gray-50);
}

.btn-buy {
    display: inline-block;
    padding: 16px 48px;
    background: var(--red-500);
    color: var(--white);
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: var(--radius);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-buy:hover {
    background: var(--red-600);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
}

/* Content Block (Article) */
.content-block {
    background: var(--white);
    padding: 40px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}

.content-block h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 40px 0 16px 0;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gray-200);
}

.content-block h2:first-child {
    margin-top: 0;
}

.content-block h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 32px 0 12px 0;
}

.content-block h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
    margin: 24px 0 10px 0;
}

.content-block p {
    margin-bottom: 16px;
    color: var(--gray-700);
    line-height: 1.8;
}

.content-block ul,
.content-block ol {
    margin: 16px 0 24px 0;
    padding-left: 24px;
}

.content-block li {
    margin-bottom: 10px;
    color: var(--gray-700);
    line-height: 1.7;
}

.content-block ul li {
    list-style: disc;
}

.content-block ol li {
    list-style: decimal;
}

.content-block ul ul,
.content-block ol ol {
    margin: 8px 0;
}

/* Figure & Images */
.content-block figure {
    margin: 32px 0;
    text-align: center;
}

.content-block figure img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.content-block figcaption {
    margin-top: 12px;
    font-size: 0.875rem;
    color: var(--gray-500);
    font-style: italic;
}

/* Tables */
.content-block table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.95rem;
}

.content-block thead {
    background: var(--gray-100);
}

.content-block th {
    padding: 14px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-800);
    border-bottom: 2px solid var(--gray-300);
}

.content-block tbody tr {
    border-bottom: 1px solid var(--gray-200);
}

.content-block tbody tr:hover {
    background: var(--gray-50);
}

.content-block td {
    padding: 14px 16px;
    color: var(--gray-700);
}

/* Blockquote */
.content-block blockquote {
    margin: 24px 0;
    padding: 20px 24px;
    background: var(--gray-50);
    border-left: 4px solid var(--red-500);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-size: 1.05rem;
    color: var(--gray-700);
    font-style: italic;
}

.content-block blockquote p:last-child {
    margin-bottom: 0;
}

/* YouTube Video */
.content-block iframe[src*="youtube"],
.content-block iframe[src*="youtu.be"] {
    display: block;
    width: 100%;
    max-width: 720px;
    height: 405px;
    margin: 32px auto;
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

/* Author Page */
.author-page {
    max-width: 800px;
    margin: 0 auto;
}

.author-hero {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 32px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    margin-bottom: 32px;
}

.author-photo-large {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--white);
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.author-info-main h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.author-socials {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.social-link {
    display: inline-block;
    padding: 8px 16px;
    background: var(--white);
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 20px;
    transition: all 0.2s ease;
}

.social-link:hover {
    background: var(--gray-800);
    border-color: var(--gray-800);
    color: var(--white);
}

.author-bio {
    margin-bottom: 32px;
}

.author-works {
    background: var(--white);
    padding: 24px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    margin-bottom: 24px;
}

.author-works h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--gray-200);
}

.works-list {
    list-style: none;
}

.works-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
}

.works-list li:last-child {
    border-bottom: none;
}

.works-list a {
    font-weight: 500;
    color: var(--gray-800);
}

.works-list a:hover {
    color: var(--red-500);
}

/* Error Page */
.error-page {
    text-align: center;
    padding: 80px 20px;
}

.error-code {
    font-size: 8rem;
    font-weight: 700;
    color: var(--gray-200);
    line-height: 1;
}

.error-page h1 {
    font-size: 2rem;
    color: var(--gray-800);
    margin-bottom: 16px;
}

.error-page p {
    color: var(--gray-500);
    margin-bottom: 32px;
}

/* Footer */
.site-footer {
    background: var(--gray-900);
    padding: 24px 0;
    text-align: center;
}

.site-footer p {
    color: var(--gray-500);
    font-size: 0.9rem;
}

/* ===========================================
   RESPONSIVE DESIGN
   =========================================== */

/* Large Desktop (1200px+) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
    
    .product-logo {
        width: 150px;
        height: 100px;
    }
}

/* Desktop (992px - 1199px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
}

/* Tablet Landscape (768px - 991px) */
@media (min-width: 768px) and (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    .page-hero h1 {
        font-size: 2rem;
    }
    
    .product-header {
        gap: 16px;
    }
    
    .product-logo {
        width: 100px;
        height: 70px;
    }
    
    .product-title h2 {
        font-size: 1.25rem;
    }
    
    .product-slogan {
        padding-left: 0;
    }
}

/* Tablet Portrait (576px - 767px) */
@media (min-width: 576px) and (max-width: 767px) {
    .container {
        max-width: 540px;
    }
    
    .site-header .container {
        flex-direction: column;
        gap: 16px;
    }
    
    .logo img {
        width: 220px;
        height: 73px;
    }
    
    .page-hero h1 {
        font-size: 1.75rem;
    }
    
    .page-headline {
        font-size: 1rem;
    }
    
    .author-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        padding: 16px;
    }
    
    .author-block {
        justify-content: flex-start;
    }
    
    .product-header {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        padding: 16px;
    }
    
    .product-logo {
        width: 100%;
        height: 120px;
        max-width: 200px;
        margin: 0 auto;
    }
    
    .product-title {
        align-items: center;
        text-align: center;
    }
    
    .product-title-top {
        flex-direction: column;
        gap: 12px;
    }
    
    .product-slogan {
        padding-left: 0;
        text-align: center;
    }
    
    .product-rating {
        align-self: center;
    }
    
    .product-proscons {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .product-row {
        padding: 16px;
    }
    
    .btn-buy {
        width: 100%;
        padding: 14px 24px;
    }
    
    .content-block {
        padding: 24px;
    }
    
    .content-block iframe[src*="youtube"] {
        height: 280px;
    }
    
    .author-hero {
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding: 24px;
    }
    
    .author-photo-large {
        width: 120px;
        height: 120px;
    }
    
    .author-socials {
        justify-content: center;
    }
    
    .author-info-main .lang-versions {
        align-items: center;
    }
}

/* Mobile (max-width: 575px) */
@media (max-width: 575px) {
    html {
        font-size: 15px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .site-header {
        padding: 12px 0;
    }
    
    .site-header .container {
        flex-direction: column;
        gap: 12px;
    }
    
    .logo img {
        width: 180px;
        height: 60px;
    }
    
    .nav-toggle {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    
    .nav-menu {
        left: 0;
        right: 0;
        min-width: auto;
    }
    
    .site-main {
        padding: 32px 0 48px;
    }
    
    .page-hero {
        margin-bottom: 32px;
    }
    
    .page-hero h1 {
        font-size: 1.5rem;
        margin-bottom: 12px;
    }
    
    .page-headline {
        font-size: 0.95rem;
        margin-bottom: 20px;
    }
    
    .author-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
        padding: 14px;
    }
    
    .author-avatar {
        width: 40px;
        height: 40px;
    }
    
    .author-label,
    .date-label,
    .lang-label {
        font-size: 0.7rem;
    }
    
    .author-name {
        font-size: 0.9rem;
    }
    
    .update-date time {
        font-size: 0.9rem;
    }
    
    .lang-links {
        flex-wrap: wrap;
    }
    
    .lang-link {
        padding: 3px 8px;
        font-size: 0.75rem;
    }
    
    /* Product Cards Mobile */
    .rating-list {
        gap: 16px;
        margin-bottom: 32px;
    }
    
    .product-card {
        border-radius: var(--radius);
    }
    
    .product-row {
        padding: 14px;
    }
    
    .product-header {
        flex-direction: column;
        align-items: stretch;
        gap: 14px;
        padding: 14px;
    }
    
    .product-logo {
        width: 100%;
        height: 100px;
        max-width: 160px;
        margin: 0 auto;
    }
    
    .product-title {
        align-items: center;
        text-align: center;
    }
    
    .product-title-top {
        flex-direction: column;
        gap: 10px;
    }
    
    .product-rank {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .product-title h2 {
        font-size: 1.125rem;
    }
    
    .product-slogan {
        padding-left: 0;
        text-align: center;
        font-size: 0.9rem;
    }
    
    .product-rating {
        align-self: center;
    }
    
    .stars svg {
        width: 18px;
        height: 18px;
    }
    
    .product-description p {
        font-size: 0.9rem;
    }
    
    .product-proscons {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .pros-list h4,
    .cons-list h4 {
        font-size: 0.8rem;
        margin-bottom: 10px;
    }
    
    .pros-list li,
    .cons-list li {
        font-size: 0.875rem;
        padding: 6px 0;
    }
    
    .product-action {
        padding: 16px 14px;
    }
    
    .btn-buy {
        width: 100%;
        padding: 14px 20px;
        font-size: 1rem;
    }
    
    /* Content Block Mobile */
    .content-block {
        padding: 20px;
        border-radius: var(--radius);
    }
    
    .content-block h2 {
        font-size: 1.375rem;
        margin: 28px 0 12px 0;
    }
    
    .content-block h3 {
        font-size: 1.125rem;
        margin: 24px 0 10px 0;
    }
    
    .content-block h4 {
        font-size: 1rem;
    }
    
    .content-block p {
        font-size: 0.95rem;
        line-height: 1.7;
    }
    
    .content-block ul,
    .content-block ol {
        padding-left: 20px;
    }
    
    .content-block li {
        font-size: 0.95rem;
    }
    
    .content-block table {
        font-size: 0.85rem;
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    .content-block th,
    .content-block td {
        padding: 10px 12px;
    }
    
    .content-block blockquote {
        padding: 16px;
        font-size: 0.95rem;
    }
    
    .content-block iframe[src*="youtube"] {
        height: 180px;
    }
    
    .content-block figure {
        margin: 24px 0;
    }
    
    .content-block figcaption {
        font-size: 0.8rem;
    }
    
    /* Author Page Mobile */
    .author-hero {
        flex-direction: column;
        text-align: center;
        gap: 16px;
        padding: 20px;
    }
    
    .author-photo-large {
        width: 100px;
        height: 100px;
    }
    
    .author-info-main h1 {
        font-size: 1.5rem;
        margin-bottom: 12px;
    }
    
    .author-socials {
        justify-content: center;
        gap: 8px;
    }
    
    .social-link {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    
    .author-info-main .lang-versions {
        align-items: center;
    }
    
    .author-bio {
        margin-bottom: 24px;
    }
    
    .author-works {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    .author-works h2 {
        font-size: 1.125rem;
    }
    
    .works-list li {
        padding: 10px 0;
    }
    
    .works-list a {
        font-size: 0.95rem;
    }
    
    /* Error Page Mobile */
    .error-page {
        padding: 60px 16px;
    }
    
    .error-code {
        font-size: 5rem;
    }
    
    .error-page h1 {
        font-size: 1.5rem;
    }
    
    /* Footer Mobile */
    .site-footer {
        padding: 20px 0;
    }
    
    .site-footer p {
        font-size: 0.85rem;
    }
}

/* Extra Small Mobile (max-width: 360px) */
@media (max-width: 360px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 12px;
    }
    
    .logo img {
        width: 150px;
        height: 50px;
    }
    
    .page-hero h1 {
        font-size: 1.35rem;
    }
    
    .product-title h2 {
        font-size: 1rem;
    }
    
    .btn-buy {
        padding: 12px 16px;
        font-size: 0.95rem;
    }
}