:root {
    --bg-primary: #f8fafb;
    --bg-secondary: #ffffff;
    --bg-gradient: linear-gradient(135deg, #2b6cb0 0%, #553c9a 50%, #9f7aea 100%);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent-primary: #2b6cb0;
    --accent-secondary: #2c5282;
    --accent-tertiary: #3182ce;
    --border-light: #e2e8f0;
    --border-medium: #cbd5e1;
    --code-bg: #f1f5f9;
    --highlight-bg: #ebf8ff;
    --success-color: #38a169;
    --warning-color: #ed8936;
    --danger-color: #e53e3e;
    --toptal-blue: #204ecf;
    --toptal-green: #3aa5a5;
    --gpt2-orange: #ff6b35;
    --gpt2-red: #e74c3c;
    --t5-purple: #9f7aea;
    --t5-blue: #4299e1;
    --transformer-gold: #ecc94b;
    --expert-blue: #3182ce;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f2e;
    --bg-gradient: linear-gradient(135deg, #1a365d 0%, #2d3748 50%, #553c9a 100%);
    --text-primary: #f7fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #a0aec0;
    --accent-primary: #63b3ed;
    --accent-secondary: #3182ce;
    --accent-tertiary: #4299e1;
    --border-light: #2d3748;
    --border-medium: #4a5568;
    --code-bg: #2d3748;
    --highlight-bg: #2a4365;
    --success-color: #68d391;
    --warning-color: #fbb045;
    --danger-color: #fc8181;
    --toptal-blue: #63b3ed;
    --toptal-green: #4fd1c7;
    --gpt2-orange: #ff8c69;
    --gpt2-red: #f87171;
    --t5-purple: #b794f6;
    --t5-blue: #63b3ed;
    --transformer-gold: #f6e05e;
    --expert-blue: #63b3ed;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 17px;
}

.theme-toggle {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 1000;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.theme-toggle i {
    margin-right: 8px;
    color: var(--accent-primary);
    transition: transform 0.3s ease;
}

.theme-toggle:hover i {
    transform: rotate(180deg);
}

.container {
    max-width: 920px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Hero Section */
.hero {
    background: var(--bg-gradient);
    padding: 140px 0 90px;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 60vh;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="toptal-pattern" width="30" height="30" patternUnits="userSpaceOnUse"><circle cx="15" cy="15" r="2" fill="rgba(255,255,255,0.08)"/><path d="M8,8 L22,22 M22,8 L8,22" stroke="rgba(255,255,255,0.04)" stroke-width="0.5"/><rect x="10" y="10" width="10" height="10" fill="none" stroke="rgba(255,255,255,0.03)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23toptal-pattern)"/></svg>');
    opacity: 0.6;
}

.hero::after {
    content: '🧠';
    position: absolute;
    top: 20%;
    right: 8%;
    font-size: 5rem;
    opacity: 0.15;
    animation: float 12s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-20px) rotate(5deg); }
    50% { transform: translateY(-35px) rotate(0deg); }
    75% { transform: translateY(-20px) rotate(-5deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.toptal-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--toptal-green);
    color: white;
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: var(--shadow-md); }
    50% { box-shadow: 0 0 20px rgba(58, 165, 165, 0.4); }
}

.toptal-badge i {
    color: rgba(255, 255, 255, 0.9);
}

.original-post-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 32px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.original-post-link:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    color: white;
    margin-bottom: 18px;
    line-height: 1.1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 36px;
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-meta {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.meta-item i {
    color: rgba(255, 255, 255, 0.9);
}

/* Article Content */
.article {
    background: var(--bg-secondary);
    margin: -50px auto 60px;
    padding: 70px;
    border-radius: 24px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    position: relative;
    z-index: 2;
}

.article h2 {
    font-size: 2.2rem;
    color: var(--text-primary);
    margin: 52px 0 28px;
    font-weight: 700;
    position: relative;
    padding-left: 20px;
}

.article h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--toptal-blue), var(--toptal-green));
    border-radius: 2px;
}

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

.article h3 {
    font-size: 1.7rem;
    color: var(--text-primary);
    margin: 40px 0 20px;
    font-weight: 600;
}

.article h4 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin: 32px 0 16px;
    font-weight: 600;
}

.article h5 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin: 24px 0 12px;
    font-weight: 600;
}

.article p {
    margin-bottom: 26px;
    color: var(--text-primary);
    line-height: 1.8;
}

.article a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.article a:hover {
    color: var(--accent-secondary);
    border-bottom-color: var(--accent-secondary);
}

.article code {
    background: var(--code-bg);
    color: var(--text-primary);
    padding: 2px 8px;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9em;
    border: 1px solid var(--border-light);
}

/* Intro Section */
.intro-section {
    margin-bottom: 40px;
    font-size: 1.1rem;
    line-height: 1.8;
}

/* Expert Verification */
.expert-verification {
    margin: 40px 0;
}

.expert-badge {
    background: linear-gradient(135deg, var(--expert-blue), var(--toptal-green));
    color: white;
    padding: 24px 32px;
    border-radius: 16px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    position: relative;
    overflow: hidden;
}

.expert-badge::before {
    content: '✓';
    position: absolute;
    top: 20px;
    right: 32px;
    font-size: 2rem;
    opacity: 0.3;
}

.expert-badge i {
    font-size: 1.8rem;
    margin-top: 4px;
    color: rgba(255, 255, 255, 0.9);
}

.expert-info h4 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: white;
    font-weight: 600;
}

.expert-info p {
    margin: 0;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
}

/* Transformer Showcase */
.transformer-showcase {
    background: linear-gradient(135deg, var(--transformer-gold), #f6ad55);
    color: var(--text-primary);
    padding: 32px;
    border-radius: 16px;
    margin: 48px 0;
    position: relative;
    overflow: hidden;
}

.transformer-showcase::before {
    content: '⚡';
    position: absolute;
    top: 20px;
    right: 32px;
    font-size: 2.5rem;
    opacity: 0.4;
}

.transformer-showcase h3 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
}

.transformer-showcase h3 i {
    color: var(--text-primary);
    font-size: 1.3rem;
    opacity: 0.8;
}

.transformer-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 32px;
    align-items: center;
}

.transformer-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border: 2px solid rgba(255, 255, 255, 0.8);
    transition: transform 0.3s ease;
}

.transformer-image:hover {
    transform: scale(1.05);
}

.transformer-description p {
    margin-bottom: 16px;
    line-height: 1.7;
    color: var(--text-primary);
}

.transformer-description p:last-child {
    margin-bottom: 0;
}

/* Model Highlights */
.model-highlight {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 28px;
    margin: 40px 0;
    border: 2px solid var(--border-medium);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.model-highlight:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.model-highlight.gpt2 {
    border-color: var(--gpt2-orange);
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(231, 76, 60, 0.05));
}

.model-highlight.t5 {
    border-color: var(--t5-purple);
    background: linear-gradient(135deg, rgba(159, 122, 234, 0.05), rgba(66, 153, 225, 0.05));
}

.model-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.model-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    flex-shrink: 0;
}

.model-highlight.gpt2 .model-icon {
    background: linear-gradient(135deg, var(--gpt2-orange), var(--gpt2-red));
}

.model-highlight.t5 .model-icon {
    background: linear-gradient(135deg, var(--t5-purple), var(--t5-blue));
}

.model-info h3 {
    font-size: 1.6rem;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 700;
}

.model-stats {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 500;
    margin: 0;
}

.model-controversy, .model-advantage {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-radius: 12px;
    margin-top: 16px;
}

.model-controversy {
    background: rgba(231, 76, 60, 0.1);
    border-left: 4px solid var(--gpt2-red);
}

.model-advantage {
    background: rgba(56, 161, 105, 0.1);
    border-left: 4px solid var(--success-color);
}

.model-controversy i {
    color: var(--gpt2-red);
    font-size: 1.2rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.model-advantage i {
    color: var(--success-color);
    font-size: 1.2rem;
    margin-top: 2px;
    flex-shrink: 0;
}

.model-controversy p, .model-advantage p {
    margin: 0;
    line-height: 1.6;
    color: var(--text-primary);
}

/* Use Cases Grid */
.use-cases-grid {
    margin: 48px 0;
}

.use-cases-grid h3 {
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-primary);
}

.use-case-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.use-case-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--gpt2-orange), var(--gpt2-red));
}

.use-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.use-case-card i {
    font-size: 2.5rem;
    color: var(--gpt2-orange);
    margin-bottom: 16px;
    display: block;
}

.use-case-card h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.use-case-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* Text Examples */
.text-examples {
    margin: 32px 0;
    display: grid;
    gap: 20px;
}

.example-block {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 20px;
    position: relative;
}

.example-block h5 {
    font-size: 1rem;
    color: var(--gpt2-orange);
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.generated-text {
    font-style: italic;
    line-height: 1.6;
    color: var(--text-secondary);
    border-left: 3px solid var(--gpt2-orange);
    padding-left: 16px;
    margin: 0;
}

/* Q&A Examples */
.qa-examples {
    margin: 32px 0;
    display: grid;
    gap: 20px;
}

.qa-block {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 20px;
}

.qa-block p {
    margin-bottom: 8px;
    line-height: 1.6;
}

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

.qa-note {
    font-size: 0.9rem;
    font-style: italic;
    margin-top: 8px;
}

/* T5 Tasks */
.t5-tasks {
    margin: 40px 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 28px;
}

.t5-tasks h3 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.t5-tasks > p {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-secondary);
}

.task-example {
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.task-example:last-child {
    margin-bottom: 0;
}

.task-type {
    font-weight: 600;
    color: var(--t5-purple);
}

.output {
    color: var(--success-color);
    font-weight: 500;
}

/* Summaries Section */
.summaries-section {
    margin: 32px 0;
    display: grid;
    gap: 20px;
}

.summary-example {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 20px;
    position: relative;
}

.summary-example h5 {
    font-size: 1rem;
    color: var(--t5-purple);
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-example p {
    font-style: italic;
    line-height: 1.6;
    color: var(--text-secondary);
    border-left: 3px solid var(--t5-purple);
    padding-left: 16px;
    margin: 0;
}

/* Comprehension Examples */
.comprehension-examples {
    margin: 40px 0;
    display: grid;
    gap: 24px;
}

.comprehension-example {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s ease;
}

.comprehension-example:hover {
    box-shadow: var(--shadow-md);
}

.comprehension-example h5 {
    font-size: 1.1rem;
    color: var(--t5-purple);
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comprehension-example p {
    margin-bottom: 12px;
    line-height: 1.6;
}

.comprehension-example p:last-child {
    margin-bottom: 0;
}

/* Business Applications */
.business-applications {
    margin: 48px 0;
}

.business-applications h3 {
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.business-applications h3 i {
    color: var(--toptal-blue);
}

.application-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.app-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--toptal-blue), var(--toptal-green));
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.app-card i {
    font-size: 2.5rem;
    color: var(--toptal-blue);
    margin-bottom: 16px;
    display: block;
}

.app-card h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.app-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* FAQ Section */
.faq-section {
    margin: 48px 0;
}

.faq-section h3 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: 24px;
    font-weight: 600;
    text-align: center;
}

.faq-item {
    background: var(--bg-primary);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
}

.faq-item h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.faq-item p {
    margin: 0;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* Author Section */
.author-section {
    margin: 48px 0;
}

.author-card {
    background: var(--bg-primary);
    border: 2px solid var(--toptal-blue);
    border-radius: 16px;
    padding: 32px;
    position: relative;
    overflow: hidden;
}

.author-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--toptal-blue), var(--toptal-green));
}

.author-info h3 {
    font-size: 1.6rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    font-weight: 700;
}

.author-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.badge {
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    color: white;
}

.badge.expert {
    background: var(--toptal-blue);
}

.badge.location {
    background: var(--toptal-green);
}

.badge.member {
    background: var(--text-muted);
}

.author-info p {
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.author-info p:last-child {
    margin-bottom: 0;
}

.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.expertise-tag {
    background: var(--expert-blue);
    color: white;
    padding: 6px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
}

/* One Model Philosophy */
.one-model-philosophy {
    background: linear-gradient(135deg, var(--t5-purple), var(--t5-blue));
    color: white;
    padding: 32px;
    border-radius: 16px;
    margin: 48px 0;
    position: relative;
    overflow: hidden;
}

.one-model-philosophy::before {
    content: '👑';
    position: absolute;
    top: 20px;
    right: 32px;
    font-size: 2.5rem;
    opacity: 0.3;
}

.one-model-philosophy h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.one-model-philosophy h3 i {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.3rem;
}

.one-model-philosophy p {
    line-height: 1.7;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.95);
}

.one-model-philosophy p:last-child {
    margin-bottom: 0;
}

/* Conclusion Vision */
.conclusion-vision {
    background: linear-gradient(135deg, var(--success-color), var(--toptal-green));
    color: white;
    padding: 32px;
    border-radius: 16px;
    margin: 48px 0;
    position: relative;
    overflow: hidden;
}

.conclusion-vision::before {
    content: '🔮';
    position: absolute;
    top: 20px;
    right: 32px;
    font-size: 2.5rem;
    opacity: 0.3;
}

.conclusion-vision h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
    color: white;
}

.conclusion-vision h3 i {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.3rem;
}

.conclusion-vision p {
    line-height: 1.7;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.95);
}

.conclusion-vision p:last-child {
    margin-bottom: 0;
}

/* Tags Section */
.tags-section {
    margin: 48px 0;
}

.tags-section h3 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
}

.tags-section h3 i {
    color: var(--toptal-blue);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tag {
    background: var(--toptal-blue);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tag:hover {
    background: var(--accent-secondary);
    transform: translateY(-2px);
}

/* Navigation */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 28px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    margin: 80px 0 60px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-md);
}

.back-link:hover {
    background: var(--toptal-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.back-link i {
    transition: transform 0.3s ease;
}

.back-link:hover i {
    transform: translateX(-4px);
}

/* Footer */
.footer {
    text-align: center;
    padding: 60px 0;
    border-top: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: 14px;
    background: var(--bg-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 100px 0 70px;
        min-height: 50vh;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .hero-meta {
        gap: 16px;
        flex-direction: column;
        align-items: center;
    }
    
    .meta-item {
        padding: 6px 12px;
    }
    
    .article {
        padding: 40px 24px;
        margin: -30px auto 40px;
    }
    
    .article h2 {
        font-size: 1.8rem;
        margin: 40px 0 24px;
    }
    
    .article h3 {
        font-size: 1.5rem;
        margin: 32px 0 16px;
    }
    
    .article h4 {
        font-size: 1.3rem;
        margin: 28px 0 14px;
    }
    
    .transformer-content {
        grid-template-columns: 1fr;
        gap: 24px;
        text-align: center;
    }
    
    .transformer-image {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .use-case-cards, .application-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .model-header {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .expert-badge {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .transformer-showcase, .one-model-philosophy, .conclusion-vision {
        padding: 24px;
    }
    
    .author-card {
        padding: 24px;
    }
    
    .theme-toggle {
        top: 16px;
        right: 16px;
        padding: 10px 16px;
    }
    
    body {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .article {
        padding: 28px 16px;
    }
    
    .article h2 {
        font-size: 1.6rem;
    }
    
    .article h3 {
        font-size: 1.3rem;
    }
    
    .transformer-showcase, .one-model-philosophy, .conclusion-vision {
        padding: 20px;
    }
    
    .expert-badge {
        padding: 20px;
    }
    
    .author-card {
        padding: 20px;
    }
    
    .use-case-card, .app-card {
        padding: 20px;
    }
    
    .comprehension-example {
        padding: 20px;
    }
    
    .tags {
        gap: 8px;
    }
    
    .tag {
        font-size: 13px;
        padding: 6px 12px;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 0 32px;
    }
    
    .article {
        padding: 80px;
    }
    
    .transformer-content {
        grid-template-columns: 1fr 1.5fr;
        gap: 40px;
    }
}

/* Print Styles */
@media print {
    .theme-toggle,
    .back-link {
        display: none;
    }
    
    .hero {
        background: none;
        color: black;
        padding: 40px 0;
    }
    
    .article {
        box-shadow: none;
        border: 1px solid #ddd;
        margin: 0;
    }
    
    .transformer-showcase,
    .one-model-philosophy,
    .conclusion-vision,
    .expert-badge {
        background: none;
        border: 1px solid #ddd;
        color: black;
    }
}