/* Fluent 2 Design Tokens and CSS Variables */

:root {
    /* Colors - Light Mode */
    --fluent-color-brand-primary: #0078d4;
    --fluent-color-brand-secondary: #106ebe;
    --fluent-color-text-primary: #242424;
    --fluent-color-text-secondary: #616161;
    --fluent-color-text-tertiary: #a19f9d;
    --fluent-color-text-disabled: #d9d9d9;
    --fluent-color-background-primary: #ffffff;
    --fluent-color-background-secondary: #f3f3f3;
    --fluent-color-background-tertiary: #efefef;
    --fluent-color-background-neutral: #fafafa;
    --fluent-color-stroke-primary: #e0e0e0;
    --fluent-color-stroke-secondary: #d0d0d0;
    --fluent-color-status-success: #107c10;
    --fluent-color-status-warning: #ffb900;
    --fluent-color-status-error: #d13438;
    --fluent-color-status-info: #0078d4;

    /* Typography */
    --fluent-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --fluent-font-size-base: 14px;
    --fluent-font-size-small: 12px;
    --fluent-font-size-large: 16px;
    --fluent-font-size-xlarge: 20px;
    --fluent-font-size-xxlarge: 28px;
    --fluent-font-size-huge: 36px;
    --fluent-font-weight-regular: 400;
    --fluent-font-weight-semibold: 600;
    --fluent-font-weight-bold: 700;
    --fluent-line-height-base: 1.5;

    /* Spacing */
    --fluent-spacing-xs: 4px;
    --fluent-spacing-s: 8px;
    --fluent-spacing-m: 16px;
    --fluent-spacing-l: 24px;
    --fluent-spacing-xl: 32px;
    --fluent-spacing-xxl: 48px;

    /* Border Radius */
    --fluent-border-radius-small: 4px;
    --fluent-border-radius-medium: 8px;
    --fluent-border-radius-large: 12px;

    /* Shadows */
    --fluent-shadow-small: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --fluent-shadow-medium: 0 3px 6px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.12);
    --fluent-shadow-large: 0 10px 20px rgba(0, 0, 0, 0.15), 0 3px 6px rgba(0, 0, 0, 0.10);

    /* Animation */
    --fluent-animation-duration-fast: 150ms;
    --fluent-animation-duration-normal: 200ms;
    --fluent-animation-duration-slow: 300ms;
}

/* Dark Mode */
[data-theme="dark"] {
    --fluent-color-brand-primary: #0078d4;
    --fluent-color-brand-secondary: #4da6ff;
    --fluent-color-text-primary: #ffffff;
    --fluent-color-text-secondary: #d9d9d9;
    --fluent-color-text-tertiary: #949494;
    --fluent-color-text-disabled: #626262;
    --fluent-color-background-primary: #1f1f1f;
    --fluent-color-background-secondary: #2d2d2d;
    --fluent-color-background-tertiary: #3c3c3c;
    --fluent-color-background-neutral: #252525;
    --fluent-color-stroke-primary: #3c3c3c;
    --fluent-color-stroke-secondary: #4c4c4c;
    --fluent-color-status-success: #107c10;
    --fluent-color-status-warning: #ffb900;
    --fluent-color-status-error: #f14949;
    --fluent-color-status-info: #0078d4;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

.fluent-body {
    font-family: var(--fluent-font-family);
    font-size: var(--fluent-font-size-base);
    font-weight: var(--fluent-font-weight-regular);
    line-height: var(--fluent-line-height-base);
    color: var(--fluent-color-text-primary);
    background-color: var(--fluent-color-background-primary);
    transition: background-color var(--fluent-animation-duration-normal), color var(--fluent-animation-duration-normal);
}

/* Container */
.fluent-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--fluent-spacing-m);
}

/* Navigation */
.fluent-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--fluent-color-stroke-primary);
    transition: background-color var(--fluent-animation-duration-normal);
}

[data-theme="dark"] .fluent-nav {
    background-color: rgba(31, 31, 31, 0.8);
}

.fluent-nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    padding: 0 var(--fluent-spacing-m);
}

.fluent-nav-brand {
    font-size: var(--fluent-font-size-xxlarge);
    font-weight: var(--fluent-font-weight-bold);
    background: linear-gradient(135deg, #0078d4, #6200ea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: opacity var(--fluent-animation-duration-fast);
}

.fluent-nav-brand:hover {
    opacity: 0.8;
}

.fluent-nav-items {
    display: flex;
    align-items: center;
    gap: var(--fluent-spacing-l);
}

.fluent-nav-link {
    font-size: var(--fluent-font-size-base);
    font-weight: var(--fluent-font-weight-semibold);
    color: var(--fluent-color-text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: color var(--fluent-animation-duration-fast);
    position: relative;
}

.fluent-nav-link:hover {
    color: var(--fluent-color-brand-primary);
}

.fluent-nav-link-active {
    color: var(--fluent-color-brand-primary);
}

.fluent-nav-link-active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--fluent-color-brand-primary);
    border-radius: var(--fluent-border-radius-small);
}

/* Theme Toggle */
.fluent-theme-toggle {
    width: 40px;
    height: 40px;
    padding: var(--fluent-spacing-s);
    background-color: var(--fluent-color-background-secondary);
    border: 1px solid var(--fluent-color-stroke-primary);
    border-radius: var(--fluent-border-radius-medium);
    color: var(--fluent-color-text-primary);
    cursor: pointer;
    transition: all var(--fluent-animation-duration-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.fluent-theme-toggle:hover {
    background-color: var(--fluent-color-background-tertiary);
}

.fluent-icon {
    width: 20px;
    height: 20px;
}

.fluent-icon-hidden {
    display: none;
}

/* Hero Section */
.fluent-hero {
    padding: var(--fluent-spacing-xxl) var(--fluent-spacing-m);
    background: linear-gradient(135deg, rgba(0, 120, 212, 0.1), rgba(98, 0, 234, 0.1));
    text-align: center;
}

.fluent-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.fluent-hero-title {
    font-size: var(--fluent-font-size-huge);
    font-weight: var(--fluent-font-weight-bold);
    margin-bottom: var(--fluent-spacing-l);
    color: var(--fluent-color-text-primary);
}

@media (max-width: 768px) {
    .fluent-hero-title {
        font-size: 28px;
    }
}

.fluent-hero-subtitle {
    font-size: var(--fluent-font-size-large);
    color: var(--fluent-color-text-secondary);
    margin-bottom: var(--fluent-spacing-l);
}

.fluent-hero-actions {
    display: flex;
    gap: var(--fluent-spacing-m);
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.fluent-button {
    padding: 12px 24px;
    border: none;
    border-radius: var(--fluent-border-radius-medium);
    font-size: var(--fluent-font-size-base);
    font-weight: var(--fluent-font-weight-semibold);
    cursor: pointer;
    transition: all var(--fluent-animation-duration-fast);
    text-decoration: none;
    display: inline-block;
    user-select: none;
}

.fluent-button-primary {
    background-color: var(--fluent-color-brand-primary);
    color: white;
}

.fluent-button-primary:hover {
    background-color: var(--fluent-color-brand-secondary);
    box-shadow: var(--fluent-shadow-small);
}

.fluent-button-primary:active {
    transform: scale(0.98);
}

.fluent-button-secondary {
    background-color: var(--fluent-color-background-secondary);
    color: var(--fluent-color-text-primary);
    border: 1px solid var(--fluent-color-stroke-primary);
}

.fluent-button-secondary:hover {
    background-color: var(--fluent-color-background-tertiary);
}

.fluent-button-light {
    background-color: white;
    color: var(--fluent-color-brand-primary);
}

.fluent-button-light:hover {
    background-color: rgba(255, 255, 255, 0.9);
}

/* Posts Section */
.fluent-posts-section {
    padding: var(--fluent-spacing-xxl) var(--fluent-spacing-m);
}

.fluent-section-title {
    font-size: var(--fluent-font-size-xxlarge);
    font-weight: var(--fluent-font-weight-bold);
    margin-bottom: var(--fluent-spacing-xl);
    color: var(--fluent-color-text-primary);
}

.fluent-posts-grid {
    display: grid;
    gap: var(--fluent-spacing-l);
    grid-template-columns: repeat(4, 1fr);
}

/* Post Card */
.fluent-post-card {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--fluent-spacing-m);
    background-color: var(--fluent-color-background-secondary);
    border: 1px solid var(--fluent-color-stroke-primary);
    border-radius: var(--fluent-border-radius-large);
    overflow: hidden;
    transition: all var(--fluent-animation-duration-normal);
    cursor: pointer;
    flex-direction: column;
}

.fluent-post-card:hover {
    box-shadow: var(--fluent-shadow-medium);
    border-color: var(--fluent-color-brand-primary);
    transform: translateY(-2px);
}

.fluent-post-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.fluent-post-content {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--fluent-spacing-m);
    flex-grow: 1;
}

.fluent-post-meta {
    display: flex;
    gap: var(--fluent-spacing-s);
    align-items: center;
    margin-bottom: var(--fluent-spacing-s);
    flex-wrap: wrap;
}

.fluent-post-tag {
    background-color: rgba(0, 120, 212, 0.1);
    color: var(--fluent-color-brand-primary);
    padding: 4px 8px;
    border-radius: var(--fluent-border-radius-small);
    font-size: var(--fluent-font-size-small);
    font-weight: var(--fluent-font-weight-semibold);
}

.fluent-post-date {
    font-size: var(--fluent-font-size-small);
    color: var(--fluent-color-text-secondary);
}

.fluent-post-title {
    font-size: var(--fluent-font-size-large);
    font-weight: var(--fluent-font-weight-bold);
    margin: 0 0 var(--fluent-spacing-s) 0;
    color: var(--fluent-color-text-primary);
    line-height: 1.4;
}

.fluent-post-excerpt {
    font-size: var(--fluent-font-size-base);
    color: var(--fluent-color-text-secondary);
    margin: 0 0 var(--fluent-spacing-m) 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.fluent-post-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--fluent-spacing-s);
    border-top: 1px solid var(--fluent-color-stroke-primary);
}

.fluent-post-readtime {
    font-size: var(--fluent-font-size-small);
    color: var(--fluent-color-text-secondary);
}

.fluent-post-link {
    color: var(--fluent-color-brand-primary);
    font-weight: var(--fluent-font-weight-semibold);
    font-size: var(--fluent-font-size-small);
    transition: all var(--fluent-animation-duration-fast);
}

.fluent-post-card:hover .fluent-post-link {
    transform: translateX(4px);
}

/* Responsive Grid Layout */
@media (max-width: 1200px) {
    .fluent-posts-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .fluent-posts-grid {
        grid-template-columns: 1fr;
    }
}

/* Skeleton Loading */
.fluent-skeleton {
    display: grid;
    gap: var(--fluent-spacing-m);
}

.fluent-skeleton-line {
    height: 16px;
    background: linear-gradient(90deg, var(--fluent-color-background-secondary), var(--fluent-color-background-tertiary), var(--fluent-color-background-secondary));
    background-size: 200% 100%;
    border-radius: var(--fluent-border-radius-small);
    animation: skeleton-loading 1.5s ease-in-out infinite;
}

.fluent-skeleton-line-lg {
    height: 28px;
    width: 60%;
}

.fluent-skeleton-line-sm {
    height: 12px;
    width: 40%;
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Newsletter Section */
.fluent-newsletter {
    padding: var(--fluent-spacing-xxl) var(--fluent-spacing-m);
    background: linear-gradient(135deg, #0078d4, #6200ea);
    color: white;
    text-align: center;
}

.fluent-newsletter-title {
    font-size: var(--fluent-font-size-xxlarge);
    font-weight: var(--fluent-font-weight-bold);
    margin-bottom: var(--fluent-spacing-m);
}

.fluent-newsletter-description {
    font-size: var(--fluent-font-size-base);
    margin-bottom: var(--fluent-spacing-l);
    opacity: 0.9;
}

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

.fluent-input {
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: var(--fluent-border-radius-medium);
    font-size: var(--fluent-font-size-base);
    color: var(--fluent-color-text-primary);
    background-color: white;
}

.fluent-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.1);
}

/* Footer */
.fluent-footer {
    padding: var(--fluent-spacing-xxl) var(--fluent-spacing-m);
    background-color: #1a1a1a;
    border-top: 3px solid rgb(126, 11, 2);
    color: #c0c0c0;
}

.fluent-footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--fluent-spacing-xl);
    margin-bottom: var(--fluent-spacing-xl);
}

.fluent-footer-title {
    font-size: var(--fluent-font-size-large);
    font-weight: var(--fluent-font-weight-bold);
    color: white;
    margin-bottom: var(--fluent-spacing-m);
}

.fluent-footer-text {
    font-size: var(--fluent-font-size-small);
    line-height: 1.6;
}

.fluent-footer-heading {
    font-size: var(--fluent-font-size-base);
    font-weight: var(--fluent-font-weight-semibold);
    color: white;
    margin-bottom: var(--fluent-spacing-m);
}

.fluent-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.fluent-footer-links li {
    margin-bottom: var(--fluent-spacing-s);
}

.fluent-footer-links a {
    color: #c0c0c0;
    text-decoration: none;
    font-size: var(--fluent-font-size-small);
    transition: color var(--fluent-animation-duration-fast);
}

.fluent-footer-links a:hover {
    color: #0078d4;
}

.fluent-footer-divider {
    height: 1px;
    background-color: rgba(255, 255, 255, 0.1);
    margin-bottom: var(--fluent-spacing-l);
}

.fluent-footer-bottom {
    text-align: center;
    font-size: var(--fluent-font-size-small);
    color: #808080;
}

/* Utility Classes */
.fluent-text-center {
    text-align: center;
}

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

.fluent-text-secondary {
    color: var(--fluent-color-text-secondary);
}

.fluent-mt-l {
    margin-top: var(--fluent-spacing-l);
}

.fluent-mb-l {
    margin-bottom: var(--fluent-spacing-l);
}

.fluent-mt-xl {
    margin-top: var(--fluent-spacing-xl);
}

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

/* Responsive */
@media (max-width: 768px) {
    .fluent-container {
        padding: 0 var(--fluent-spacing-m);
    }

    .fluent-hero {
        padding: var(--fluent-spacing-xl) var(--fluent-spacing-m);
    }

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

    .fluent-nav-items {
        gap: var(--fluent-spacing-m);
    }
}

/* Print Styles */
@media print {
    .fluent-nav,
    .fluent-newsletter,
    .fluent-footer {
        display: none;
    }
}