/* ========================================
   FitLife Hub - The Body Coach Style Design System
   现代运动健康风格 - 明亮蓝色主题
   ======================================== */

/* CSS Custom Properties (Design Tokens) */
:root {
    /* 主色 - The Body Coach Blue */
    --color-primary: #0066CC;
    --color-primary-hover: #0052A3;
    --color-primary-light: #E8F4FD;
    --color-primary-dark: #004C99;

    /* 强调色 */
    --color-accent: #95C93D;
    --color-accent-light: #F2FBE8;
    --color-accent-hover: #7DB830;
    --color-secondary: #3b82f6;

    /* 背景 - 亮色主题 */
    --color-bg-primary: #FFFFFF;
    --color-bg-secondary: #F0F4F8;
    --color-bg-tertiary: #E2E8F0;

    /* 文字 */
    --color-text-primary: #1A1A2E;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    --color-text-inverse: #FFFFFF;

    /* 语义色 */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* 边框 */
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;

    /* 字体 - 全无衬线 */
    --font-family-display: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-family-heading: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-family-body: 'Inter', 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* 字号 */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1.0625rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3.25rem;
    --font-size-5xl: 4rem;

    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* 阴影 - 轻阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.06);

    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Base Styles
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: 900;
}
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }

p {
    margin-bottom: var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: all var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

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

/* ========================================
   Utility Classes
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.hidden-lg {
    display: inline;
}

@media (min-width: 1024px) {
    .hidden-lg {
        display: none;
    }
}

.section {
    padding: var(--space-20) 0;
}

.section-alt {
    background-color: var(--color-bg-secondary);
}

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

.text-primary {
    color: var(--color-primary);
}

/* ========================================
   Wave Divider
   ======================================== */
.section-wave {
    position: relative;
}

.section-wave::after {
    display: none;
}

/* ========================================
   Components - Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-8);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: none;
    border-radius: 9999px;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    line-height: 1;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: var(--color-text-inverse);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-text-primary);
}

.btn-accent:hover {
    background: var(--color-accent-hover);
    color: var(--color-text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-white {
    background: var(--color-bg-primary);
    color: var(--color-primary);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.btn-white:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: var(--space-4) var(--space-10);
    font-size: var(--font-size-base);
}

/* ========================================
   Components - Navigation (Blue Bar)
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-6) 0;
    transition: all var(--transition-normal);
    background: var(--color-primary);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: var(--space-4) 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: 'Space Grotesk', var(--font-family-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-inverse);
    text-decoration: none;
    letter-spacing: -0.03em;
}

.nav-logo .logo-accent {
    color: var(--color-accent);
}

.nav-logo:hover {
    color: var(--color-text-inverse);
    opacity: 0.9;
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    object-fit: cover;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
}

.nav-links a {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: rgba(255, 255, 255, 0.85);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    position: relative;
    padding: var(--space-2) 0;
    transition: all var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-text-inverse);
    transition: width var(--transition-normal);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-text-inverse);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-2);
    background: transparent;
    border: none;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-text-inverse);
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* ========================================
   Components - Cards (White, Light Shadow)
   ======================================== */
.card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
}

.card-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.card:hover .card-image {
    transform: scale(1.03);
}

.card-content {
    padding: var(--space-6);
}

.card-category {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-3);
}

.card-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    line-height: 1.3;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
}

/* ========================================
   Components - Hero Section (Blue Background)
   ======================================== */
.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    overflow: hidden;
    padding: 100px 0 60px;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(255, 255, 255, 0.08), transparent 60%),
        radial-gradient(ellipse at 70% 80%, rgba(255, 255, 255, 0.05), transparent 60%);
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 2;
    max-width: 800px;
    text-align: center;
}

.hero .container.hero-layout {
    max-width: 1200px;
    text-align: left;
}

.hero-content {
    animation: fadeInUp 1s ease-out;
}

.hero h1 {
    font-family: var(--font-family-heading);
    font-size: clamp(2.5rem, 5.5vw, 4.5rem);
    font-weight: 900;
    color: var(--color-text-inverse);
    margin-bottom: var(--space-6);
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.hero h1 .highlight {
    color: var(--color-accent);
}

.hero p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: var(--space-8);
    line-height: 1.7;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 6px 18px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-full);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-text-inverse);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-6);
}

.hero-buttons {
    display: flex;
    gap: var(--space-4);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-12);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-12);
    padding-top: var(--space-10);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    flex-wrap: wrap;
}

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

.hero-stat-number {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-3xl);
    font-weight: 900;
    color: var(--color-text-inverse);
    line-height: 1;
    margin-bottom: 4px;
}

.hero-stat-label {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 600;
}

/* Page Hero (Secondary Pages) */
.page-hero {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--color-primary);
    overflow: hidden;
    padding: 140px 0 90px;
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(255, 255, 255, 0.06), transparent 60%);
    z-index: 0;
}

.page-hero .container {
    position: relative;
    z-index: 2;
}

.page-hero h1 {
    font-family: var(--font-family-heading);
    font-size: clamp(2.2rem, 4.5vw, 3.5rem);
    font-weight: 900;
    color: var(--color-text-inverse);
    margin-bottom: var(--space-4);
    line-height: 1.12;
}

.page-hero p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    max-width: 560px;
}

/* Hero Badge (light variant for non-blue hero sections) */
.hero-badge-light {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 5px 16px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

/* ========================================
   Hero for light-bg pages (blog, about, etc.)
   ======================================== */
.hero-light {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--color-bg-secondary);
    overflow: hidden;
    padding: 130px 0 80px;
}

.hero-light::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 25% 50%, var(--color-primary-light), transparent 60%);
    z-index: 0;
}

.hero-light .container {
    position: relative;
    z-index: 2;
}

.hero-light h1 {
    font-family: var(--font-family-heading);
    font-size: clamp(2.2rem, 4.5vw, 3.5rem);
    font-weight: 900;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
    line-height: 1.12;
}

.hero-light p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 560px;
}

/* ========================================
   Components - Featured Post
   ======================================== */
.featured-post {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
    padding: var(--space-12) 0;
}

.featured-post-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.featured-post-image img {
    width: 100%;
    height: 480px;
    object-fit: cover;
}

.featured-post-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-accent);
    color: var(--color-text-primary);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-6);
}

.featured-post-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
    line-height: 1.15;
}

.featured-post-excerpt {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
}

/* ========================================
   Components - Article Cards (Blog List)
   ======================================== */
.article-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border);
}

.article-card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.article-card-body {
    padding: var(--space-6);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-card-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    line-height: 1.3;
}

.article-card-excerpt {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    margin-bottom: var(--space-4);
    flex: 1;
}

.article-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

/* Blog Post Card (Horizontal, for blog list) */
.blog-post-card {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 0;
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-6);
}

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

.blog-post-card-image {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
}

.blog-post-card-body {
    padding: var(--space-8);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* ========================================
   Components - Forms
   ======================================== */
.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.12);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

/* ========================================
   Components - Newsletter
   ======================================== */
.newsletter {
    background: var(--color-primary);
    border-radius: 0;
    padding: var(--space-16);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.newsletter::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 70%);
}

.newsletter .container {
    position: relative;
    z-index: 2;
}

.newsletter h2 {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-3xl);
    color: var(--color-text-inverse);
    margin-bottom: var(--space-4);
    font-weight: 800;
}

.newsletter p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-8);
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-form {
    display: flex;
    gap: var(--space-3);
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    background: var(--color-bg-primary);
    border: 2px solid transparent;
    border-radius: 9999px;
    color: var(--color-text-primary);
    font-family: var(--font-family-body);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(149, 201, 61, 0.2);
}

.newsletter-form .btn {
    border-radius: 9999px;
}

/* ========================================
   Components - Footer (Dark)
   ======================================== */
.footer {
    background: #0F172A;
    color: rgba(255, 255, 255, 0.7);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand {
    font-family: 'Space Grotesk', var(--font-family-heading);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-inverse);
    margin-bottom: var(--space-4);
    letter-spacing: -0.03em;
}

.footer-description {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-6);
    line-height: 1.8;
}

.footer-social {
    display: flex;
    gap: var(--space-3);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    font-size: var(--font-size-base);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    transform: translateY(-3px);
}

.footer-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-base);
    font-weight: 800;
    color: var(--color-text-inverse);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-6);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-links a:hover {
    color: var(--color-text-inverse);
    transform: translateX(4px);
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a:hover {
    color: var(--color-text-inverse);
}

/* ========================================
   Components - Category Pills
   ======================================== */
.category-pill {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-5);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    cursor: pointer;
}

.category-pill:hover,
.category-pill.active {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* ========================================
   Components - Author Box
   ======================================== */
.author-box {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-8);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    margin-top: var(--space-12);
}

.author-avatar {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 3px solid var(--color-primary);
}

.author-name {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.author-bio {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ========================================
   Components - Blockquote
   ======================================== */
blockquote {
    padding: var(--space-6) var(--space-8);
    background: var(--color-primary-light);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: var(--space-8) 0;
    font-style: italic;
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.8;
}

/* ========================================
   Components - Tags
   ======================================== */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-6);
}

.tag {
    display: inline-block;
    padding: var(--space-1) var(--space-3);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.tag:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* ========================================
   Components - Pagination
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-12);
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-secondary);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.pagination a:hover,
.pagination span.current {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}

/* ========================================
   Components - Back to Top
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border: none;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    font-size: var(--font-size-xl);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-primary-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   Article Body Styles
   ======================================== */
.article-body {
    max-width: 740px;
    margin: 0 auto;
}

.article-body h2 {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-3xl);
    color: var(--color-text-primary);
    margin: 3rem 0 1rem;
    line-height: 1.25;
}

.article-body h3 {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin: 2rem 0 0.75rem;
}

.article-body p {
    color: var(--color-text-secondary);
    line-height: 1.85;
    margin-bottom: 1.25rem;
    font-size: var(--font-size-base);
}

.article-body ul,
.article-body ol {
    color: var(--color-text-secondary);
    line-height: 1.85;
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-body li {
    margin-bottom: 0.5rem;
}

.article-body .tip-box {
    background: var(--color-primary-light);
    border-left: 3px solid var(--color-primary);
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.article-body .tip-box strong {
    color: var(--color-primary);
}

.article-body .exercise-box {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border: 1px solid var(--color-border);
}

.article-body .exercise-box h4 {
    font-family: var(--font-family-heading);
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
    font-size: var(--font-size-lg);
}

.article-body .meta-bar {
    display: flex;
    gap: 1.5rem;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-up {
    animation: fadeInUp 0.8s ease-out;
}

.animate-fade-right {
    animation: fadeInRight 0.8s ease-out;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .featured-post {
        grid-template-columns: 1fr;
    }

    .blog-post-card {
        grid-template-columns: 1fr;
    }

    .blog-post-card-image {
        height: 240px;
        min-height: auto;
    }

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

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-primary);
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-4);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-stats {
        gap: var(--space-6);
    }

    .hero-stat-number {
        font-size: var(--font-size-2xl);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .featured-post {
        gap: var(--space-8);
    }

    .featured-post-image img {
        height: 320px;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }

    .section {
        padding: var(--space-12) 0;
    }

    .blog-post-card-body {
        padding: var(--space-6);
    }
}

/* ========================================
   Modal Overlay
   ======================================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.modal-overlay.active {
    display: flex;
}

.modal-content {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-12);
    text-align: center;
    max-width: 420px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: var(--space-4);
    color: var(--color-accent);
}

.modal-content h3 {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-2xl);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.modal-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-8);
    line-height: 1.6;
}

/* ========================================
   Hero Layout (Left Text + Right Image)
   ======================================== */
.hero-layout {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    position: relative;
    z-index: 10;
    padding-top: 2rem;
    padding-bottom: 2rem;
}

@media (min-width: 1024px) {
    .hero-layout {
        display: grid;
        grid-template-columns: 5fr 6fr;
        gap: 4rem;
        align-items: center;
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
}

.hero-text-side {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 1.25rem;
}

@media (min-width: 1024px) {
    .hero-text-side {
        text-align: left;
        align-items: flex-start;
        gap: 1.5rem;
    }
}

.hero-star-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 2rem;
    padding: 0.5rem 1.25rem;
    width: fit-content;
}

.hero-star-badge .star-num {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-inverse);
    text-transform: uppercase;
}

.hero-star-badge svg {
    width: 16px;
    height: 16px;
    color: var(--color-accent);
    fill: var(--color-accent);
}

.hero-star-badge .star-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-inverse);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.hero-layout h1 {
    font-size: clamp(2rem, 4.5vw, 3.5rem);
    font-weight: 900;
    color: var(--color-text-inverse);
    line-height: 1.1;
    margin-bottom: 0;
    text-transform: uppercase;
    letter-spacing: -0.02em;
}

.hero-layout .hero-highlight {
    color: var(--color-accent);
}

.hero-layout p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.85);
    max-width: 36rem;
    margin-bottom: 0;
}

.hero-layout .hero-cta {
    margin-top: 0.5rem;
    display: flex;
    justify-content: center;
}

@media (min-width: 1024px) {
    .hero-layout .hero-cta {
        justify-content: flex-start;
    }
}

.hero-image-side {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 100%;
}

@media (min-width: 1024px) {
    .hero-image-side {
        width: 100%;
    }
}

.hero-image-wrapper {
    position: relative;
    width: 100%;
}

.hero-image-container {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-radius: 1rem 1rem 0 0;
}

@media (min-width: 768px) {
    .hero-image-container {
        aspect-ratio: 16 / 9;
        border-radius: 1.25rem 1.25rem 0 0;
    }
}

.hero-image-container img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-quote-block {
    background: #1368DE;
    color: var(--color-text-inverse);
    font-style: normal;
    font-weight: 400;
    font-size: var(--font-size-base);
    padding: 1.25rem 1.5rem;
    border-radius: 0 0 1rem 1rem;
}

@media (min-width: 768px) {
    .hero-quote-block {
        font-size: var(--font-size-lg);
        padding: 1.5rem 2rem;
        border-radius: 0 0 1.25rem 1.25rem;
    }
}

.hero-quote-block p {
    color: var(--color-text-inverse);
    margin-bottom: 0;
    line-height: 1.6;
}

.hero-quote-block .quote-author {
    color: var(--color-text-inverse);
    font-weight: 600;
}

/* ========================================
   Blog Grid Cards (Vertical, 3 columns)
   ======================================== */
.blog-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 4rem;
}

@media (min-width: 768px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .blog-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.blog-grid-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.blog-grid-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.blog-grid-card-image {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.blog-grid-card:hover .blog-grid-card-image {
    transform: scale(1.03);
}

.blog-grid-card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-grid-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.blog-grid-card-tag {
    display: inline-block;
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    text-decoration: none;
}

.blog-grid-card-tag:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

.blog-grid-card-tag::after {
    content: '/';
    margin-left: 0.5rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

.blog-grid-card-tag:last-child::after {
    content: '';
}

.blog-grid-card-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-text-primary);
    margin-bottom: 0.75rem;
    line-height: 1.25;
    text-decoration: none;
}

.blog-grid-card-title a {
    color: inherit;
    text-decoration: none;
}

.blog-grid-card-title a:hover {
    color: var(--color-primary);
}

.blog-grid-card-excerpt {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    flex: 1;
}

/* ========================================
   Load More Button
   ======================================== */
.load-more-wrapper {
    text-align: center;
    padding-bottom: 5rem;
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2.5rem;
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.load-more-btn:hover {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .navbar,
    .footer,
    .back-to-top,
    .newsletter {
        display: none;
    }

    body {
        color: black;
        background: white;
    }
}