/* ============================================
   CSS Variables & Design Tokens
   ============================================ */
:root {
    /* Colors */
    --color-primary: #135bec;
    --color-primary-hover: #1047c4;

    /* Light Mode Colors */
    --color-bg-light: #f6f6f8;
    --color-surface-light: #ffffff;
    --color-text-light: #0f172a;
    --color-text-secondary-light: #475569;
    --color-border-light: #e2e8f0;

    /* Dark Mode Colors */
    --color-bg-dark: #101622;
    --color-surface-dark: #1a2233;
    --color-text-dark: #f1f5f9;
    --color-text-secondary-dark: #92a4c9;
    --color-border-dark: #232f48;

    /* Active Theme Colors */
    --bg-color: var(--color-bg-light);
    --surface-color: var(--color-surface-light);
    --text-color: var(--color-text-light);
    --text-secondary: var(--color-text-secondary-light);
    --border-color: var(--color-border-light);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Typography */
    --font-family: 'Inter', sans-serif;
    --font-size-xs: 0.625rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-6xl: 3.75rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --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);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 1000ms ease;
}

/* Dark Mode Variables */
.dark {
    --bg-color: var(--color-bg-dark);
    --surface-color: var(--color-surface-dark);
    --text-color: var(--color-text-dark);
    --text-secondary: var(--color-text-secondary-dark);
    --border-color: var(--color-border-dark);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Material Symbols */
.material-symbols-outlined {
    font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ============================================
   Layout Components
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: 4rem 0;
}

.section-lg {
    padding: 6rem 0;
}

.section-border {
    border-top: 1px solid var(--border-color);
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(246, 246, 248, 0.8);
    backdrop-filter: blur(12px);
}

.dark .nav {
    background-color: rgba(16, 22, 34, 0.8);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.nav-logo {
    width: 2rem;
    height: 2rem;
    background-color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.nav-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.nav-menu {
    display: none;
    flex: 1;
    justify-content: flex-end;
    align-items: center;
    gap: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
}

.nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.625rem var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: var(--font-size-sm);
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    min-width: 100px;
}

.btn-primary:hover {
    filter: brightness(1.1);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--surface-color);
}

.dark .btn-secondary:hover {
    background-color: var(--color-surface-dark);
}

.btn-lg {
    height: 3rem;
    padding: 0 var(--spacing-xl);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
}

.card-hover:hover {
    border-color: rgba(19, 91, 236, 0.5);
}

.card-content {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

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

/* Project Card */
.project-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.project-image {
    aspect-ratio: 16 / 9;
    width: 100%;
    background-size: cover;
    background-position: center;
}

/* Tech Stack Card */
.tech-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.tech-card:hover {
    background-color: rgba(19, 91, 236, 0.05);
}

.tech-card .material-symbols-outlined {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.tech-card:hover .material-symbols-outlined {
    transform: scale(1.1);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 4rem 0;
}

@media (min-width: 768px) {
    .hero {
        padding: 6rem 0;
    }
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .hero-content {
        flex-direction: row;
    }
}

.hero-image-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
}

@media (min-width: 768px) {
    .hero-image-wrapper {
        width: 50%;
    }
}

.hero-image-group {
    position: relative;
}

.hero-image-glow {
    position: absolute;
    inset: -0.25rem;
    background: linear-gradient(to right, var(--color-primary), #60a5fa);
    border-radius: var(--radius-2xl);
    filter: blur(16px);
    opacity: 0.25;
    transition: opacity var(--transition-slow);
}

.hero-image-group:hover .hero-image-glow {
    opacity: 0.5;
}

.hero-image {
    position: relative;
    width: 16rem;
    height: 16rem;
    background-color: #e2e8f0;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .hero-image {
        width: 20rem;
        height: 20rem;
    }
}

.dark .hero-image {
    background-color: var(--color-surface-dark);
}

.hero-image-bg {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.hero-text {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
}

@media (min-width: 768px) {
    .hero-text {
        width: 50%;
        text-align: left;
    }
}

.hero-text-inner {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

@media (min-width: 768px) {
    .hero-actions {
        justify-content: flex-start;
    }
}

/* Article Hero */
.article-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2xl);
    text-align: center;
}

.article-image-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
}

.article-image-group {
    position: relative;
    max-width: 56rem;
    width: 100%;
}

.article-image {
    position: relative;
    width: 100%;
    height: 20rem;
    background-color: #e2e8f0;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

@media (min-width: 768px) {
    .article-image {
        height: 24rem;
    }
}

.dark .article-image {
    background-color: var(--color-surface-dark);
}

.article-content {
    width: 100%;
    max-width: 48rem;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.article-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.article-author-image {
    width: 2rem;
    height: 2rem;
    border-radius: var(--radius-full);
    object-fit: cover;
}

.article-author-name {
    font-weight: 500;
    color: var(--text-color);
}

.dark .article-author-name {
    color: #e2e8f0;
}

/* ============================================
   Typography
   ============================================ */
.heading-1 {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

@media (min-width: 768px) {
    .heading-1 {
        font-size: var(--font-size-6xl);
    }
}

.heading-2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.025em;
}

.heading-3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    line-height: 1.4;
}

.text-lead {
    font-size: var(--font-size-lg);
    line-height: 1.75;
    color: var(--text-secondary);
    max-width: 40rem;
}

.text-body {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.text-caption {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.text-label {
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
}

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

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

.text-semibold {
    font-weight: 600;
}

.text-medium {
    font-weight: 500;
}

.text-uppercase {
    text-transform: uppercase;
}

.text-tracking-wide {
    letter-spacing: 0.05em;
}

.text-tracking-tight {
    letter-spacing: -0.025em;
}

.line-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   Links
   ============================================ */
.link {
    color: var(--color-primary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.link:hover {
    text-decoration: underline;
}

.link-icon {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.icon-link {
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.icon-link:hover {
    color: var(--color-primary);
}

/* ============================================
   Badges & Tags
   ============================================ */
.badge {
    padding: 0.25rem 0.5rem;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background-color: rgba(19, 91, 236, 0.1);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
}

/* ============================================
   Grid Layouts
   ============================================ */
.grid {
    display: grid;
    gap: var(--spacing-xl);
}

.grid-cols-1 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
}

@media (min-width: 640px) {
    .grid-cols-sm-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (min-width: 768px) {
    .grid-cols-md-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .grid-cols-md-4 {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }
}

@media (min-width: 1024px) {
    .grid-cols-lg-3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .grid-cols-lg-6 {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }
}

.grid-gap-sm {
    gap: var(--spacing-md);
}

/* ============================================
   Flex Utilities
   ============================================ */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

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

.items-start {
    align-items: flex-start;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-1 {
    gap: 0.25rem;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-4 {
    gap: var(--spacing-md);
}

.gap-6 {
    gap: var(--spacing-lg);
}

.gap-8 {
    gap: var(--spacing-xl);
}

/* ============================================
   Section Headers
   ============================================ */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2.5rem;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
}

@media (min-width: 768px) {
    .footer-container {
        flex-direction: row;
    }
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
}

@media (min-width: 768px) {
    .footer-brand {
        text-align: left;
    }
}

.footer-logo-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    justify-content: center;
}

@media (min-width: 768px) {
    .footer-logo-wrapper {
        justify-content: flex-start;
    }
}

.footer-logo {
    width: 1.5rem;
    height: 1.5rem;
    background-color: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.footer-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.footer-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.footer-social {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-social-link {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-social-link:hover {
    color: var(--color-primary);
}

/* ============================================
   Prose (Article Content)
   ============================================ */
.prose {
    max-width: 48rem;
    margin: 0 auto;
    line-height: 1.75;
}

.prose p {
    margin-bottom: var(--spacing-md);
}

.prose h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-md);
}

.prose h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.prose ul,
.prose ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}

.prose li {
    margin-bottom: var(--spacing-sm);
}

.prose strong {
    font-weight: 600;
}

.prose pre {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

.prose code {
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
}

.prose figure {
    margin: var(--spacing-xl) 0;
}

.prose img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.prose figcaption {
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.dark .prose {
    color: var(--color-text-dark);
}

/* ============================================
   Utility Classes
   ============================================ */
.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}

.mt-auto {
    margin-top: auto;
}

.rounded-lg {
    border-radius: var(--radius-md);
}

.rounded-xl {
    border-radius: var(--radius-xl);
}

.rounded-2xl {
    border-radius: var(--radius-2xl);
}

.rounded-full {
    border-radius: var(--radius-full);
}

.transition {
    transition: all var(--transition-fast);
}

.cursor-pointer {
    cursor: pointer;
}

.overflow-hidden {
    overflow: hidden;
}

.aspect-video {
    aspect-ratio: 16 / 9;
}

.object-cover {
    object-fit: cover;
}

.bg-cover {
    background-size: cover;
}

.bg-center {
    background-position: center;
}

/* ============================================
   Dashboard Config Display
   ============================================ */
.config-grid {
    display: grid;
    gap: var(--spacing-md);
}

.config-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--bg-color);
    border-radius: var(--radius-md);
}

.config-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.config-value {
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
    font-size: var(--font-size-sm);
    color: var(--text-color);
    background-color: var(--surface-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    word-break: break-all;
}

.admin-card-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
}

.admin-card-title .material-symbols-outlined {
    font-size: 1.25rem;
    color: var(--color-primary);
}

/* ============================================
   Admin Table Footer (no pagination)
   ============================================ */
.admin-table-footer {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-color);
}

.table-count-info {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}