/*
 * Claude Code Demos - Portfolio Stylesheet
 * A modern, responsive design with CSS custom properties for theming
 */

/* ========================================
   CSS Custom Properties (Theming)
   ======================================== */
:root {
    /* Colors - Professional Blue/Gray Palette */
    --color-primary: #2563eb;
    --color-primary-light: #3b82f6;
    --color-primary-dark: #1d4ed8;
    --color-primary-subtle: #eff6ff;

    --color-accent: #8b5cf6;
    --color-accent-light: #a78bfa;

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    /* Neutrals */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    --color-white: #ffffff;
    --color-black: #000000;

    /* Semantic Colors */
    --color-text-primary: var(--color-gray-900);
    --color-text-secondary: var(--color-gray-600);
    --color-text-tertiary: var(--color-gray-500);
    --color-text-inverse: var(--color-white);

    --color-bg-primary: var(--color-white);
    --color-bg-secondary: var(--color-gray-50);
    --color-bg-tertiary: var(--color-gray-100);

    --color-border: var(--color-gray-200);
    --color-border-light: var(--color-gray-100);

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, 'Courier New', monospace;

    --font-size-xs: 0.75rem;
    --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-5xl: 3rem;
    --font-size-6xl: 3.75rem;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Layout */
    --container-max: 1200px;
    --header-height: 4rem;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ========================================
   Layout Components
   ======================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.main-content {
    flex: 1;
}

/* ========================================
   Navigation
   ======================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border-light);
}

.navbar {
    height: var(--header-height);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
    color: var(--color-text-primary);
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    border-radius: var(--radius-lg);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

.logo-text {
    display: none;
}

@media (min-width: 640px) {
    .logo-text {
        display: inline;
    }
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-primary);
    background-color: var(--color-bg-tertiary);
}

.nav-link.active {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.nav-toggle:hover {
    background-color: var(--color-bg-tertiary);
}

.hamburger {
    position: relative;
    width: 1.25rem;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -6px;
}

.hamburger::after {
    bottom: -6px;
}

.nav-toggle.active .hamburger {
    background-color: transparent;
}

.nav-toggle.active .hamburger::before {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.active .hamburger::after {
    transform: translateY(-6px) rotate(-45deg);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: var(--spacing-2);
        padding: var(--spacing-4);
        background-color: var(--color-bg-primary);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }

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

    .nav-link {
        width: 100%;
        justify-content: center;
        padding: var(--spacing-3) var(--spacing-4);
    }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background-color: var(--color-gray-200);
    color: var(--color-text-primary);
}

.btn-small {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-xs);
}

.btn-large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-base);
}

.btn-icon {
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.btn:hover .btn-icon {
    transform: translateX(2px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding: var(--spacing-16) 0 var(--spacing-20);
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.hero .container {
    display: grid;
    gap: var(--spacing-12);
    align-items: center;
}

@media (min-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-16);
    }
}

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

@media (min-width: 1024px) {
    .hero-content {
        text-align: left;
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-4);
    margin-bottom: var(--spacing-6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
    border-radius: var(--radius-full);
}

.badge-icon {
    font-size: var(--font-size-lg);
}

.hero-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-6);
}

@media (min-width: 640px) {
    .hero-title {
        font-size: var(--font-size-5xl);
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-6xl);
    }
}

.gradient-text {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-8);
    max-width: 36rem;
}

@media (min-width: 1024px) {
    .hero-description {
        margin-left: 0;
        margin-right: auto;
    }
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
    justify-content: center;
}

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

/* Code Window */
.hero-visual {
    display: flex;
    justify-content: center;
}

.code-window {
    width: 100%;
    max-width: 28rem;
    background-color: var(--color-gray-900);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: var(--color-gray-800);
    border-bottom: 1px solid var(--color-gray-700);
}

.code-dots {
    display: flex;
    gap: var(--spacing-2);
}

.dot {
    width: 0.75rem;
    height: 0.75rem;
    border-radius: var(--radius-full);
}

.dot-red {
    background-color: #ef4444;
}

.dot-yellow {
    background-color: #f59e0b;
}

.dot-green {
    background-color: #10b981;
}

.code-filename {
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
}

.code-body {
    padding: var(--spacing-6);
    overflow-x: auto;
}

.code-body pre {
    margin: 0;
}

.code-body code {
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    color: var(--color-gray-300);
}

.code-keyword {
    color: #f472b6;
}

.code-string {
    color: #a5d6a7;
}

.code-decorator {
    color: #ffd54f;
}

.code-function {
    color: #90caf9;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--spacing-20) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

@media (min-width: 640px) {
    .section-title {
        font-size: var(--font-size-4xl);
    }
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 36rem;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    gap: var(--spacing-8);
}

@media (min-width: 768px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.feature-card {
    padding: var(--spacing-8);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    margin-bottom: var(--spacing-4);
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
}

.feature-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-3);
}

.feature-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

/* ========================================
   CTA Section
   ======================================== */
.cta-section {
    padding: var(--spacing-16) 0;
    background-color: var(--color-bg-secondary);
}

.cta-content {
    text-align: center;
    max-width: 36rem;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

.cta-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-8);
}

/* ========================================
   Page Header
   ======================================== */
.page-header {
    padding: var(--spacing-16) 0 var(--spacing-12);
    background-color: var(--color-bg-secondary);
    text-align: center;
}

.page-title {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

@media (min-width: 640px) {
    .page-title {
        font-size: var(--font-size-5xl);
    }
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 36rem;
    margin: 0 auto;
}

/* ========================================
   About Page
   ======================================== */
.about-section {
    padding: var(--spacing-16) 0;
}

.about-grid {
    display: grid;
    gap: var(--spacing-12);
}

@media (min-width: 1024px) {
    .about-grid {
        grid-template-columns: 2fr 1fr;
        gap: var(--spacing-16);
    }
}

.about-main {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-12);
}

.about-card {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-6);
    padding: var(--spacing-8);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

@media (min-width: 640px) {
    .about-card {
        flex-direction: row;
        gap: var(--spacing-8);
    }
}

.about-avatar {
    flex-shrink: 0;
}

.avatar-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 6rem;
    height: 6rem;
    background: linear-gradient(135deg, var(--color-primary-subtle), var(--color-bg-tertiary));
    color: var(--color-primary);
    border-radius: var(--radius-full);
}

.about-intro h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

.bio-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-4);
}

.bio-text:last-child {
    margin-bottom: 0;
}

/* Skills Section */
.skills-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-6);
}

.skills-grid {
    display: grid;
    gap: var(--spacing-8);
}

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

.skill-category h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

.skill-category h3 svg {
    color: var(--color-primary);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
}

.skill-tag {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    background-color: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
}

/* Sidebar */
.about-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-8);
}

.contact-card {
    padding: var(--spacing-8);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.contact-card h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-3);
}

.contact-card > p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-6);
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.contact-item svg {
    flex-shrink: 0;
    color: var(--color-primary);
}

.contact-item a {
    color: var(--color-text-secondary);
    word-break: break-all;
}

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

.highlight-card {
    padding: var(--spacing-6);
    background: linear-gradient(135deg, var(--color-primary-subtle), var(--color-bg-secondary));
    border-radius: var(--radius-xl);
}

.highlight-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    margin-bottom: var(--spacing-4);
    background-color: var(--color-white);
    color: var(--color-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.highlight-card h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
}

.highlight-card p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

/* ========================================
   Projects Page
   ======================================== */
.projects-section {
    padding: var(--spacing-16) 0;
}

.projects-grid {
    display: grid;
    gap: var(--spacing-8);
}

@media (min-width: 640px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

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

.project-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.project-image {
    position: relative;
    aspect-ratio: 16 / 10;
    background-color: var(--color-bg-tertiary);
    overflow: hidden;
}

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

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    gap: var(--spacing-2);
    color: var(--color-gray-400);
}

.image-placeholder span {
    font-size: var(--font-size-sm);
}

.project-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: var(--spacing-6);
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-3);
}

.project-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-4);
    flex: 1;
}

.project-technologies {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.tech-tag {
    padding: var(--spacing-1) var(--spacing-2);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
    background-color: var(--color-primary-subtle);
    border-radius: var(--radius-sm);
}

.project-actions {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-16) var(--spacing-8);
    text-align: center;
}

.empty-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 6rem;
    height: 6rem;
    margin-bottom: var(--spacing-6);
    background-color: var(--color-bg-tertiary);
    color: var(--color-gray-400);
    border-radius: var(--radius-full);
}

.empty-state h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-3);
}

.empty-state p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 24rem;
}

/* Projects CTA */
.projects-cta {
    padding: var(--spacing-12) 0;
    background-color: var(--color-bg-secondary);
}

.cta-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-6);
    padding: var(--spacing-8);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-align: center;
}

@media (min-width: 768px) {
    .cta-box {
        flex-direction: row;
        text-align: left;
    }
}

.cta-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 4rem;
    height: 4rem;
    flex-shrink: 0;
    background-color: var(--color-primary-subtle);
    color: var(--color-primary);
    border-radius: var(--radius-xl);
}

.cta-text {
    flex: 1;
}

.cta-text h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-2);
}

.cta-text p {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    padding: var(--spacing-12) 0 var(--spacing-8);
    background-color: var(--color-gray-900);
    color: var(--color-gray-400);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-8);
    padding-bottom: var(--spacing-8);
    border-bottom: 1px solid var(--color-gray-800);
}

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-white);
    margin-bottom: var(--spacing-3);
}

.footer-brand .logo-icon {
    width: 2rem;
    height: 2rem;
    font-size: var(--font-size-xs);
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

.footer-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    text-align: center;
}

@media (min-width: 640px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
    }
}

.copyright,
.powered-by {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ========================================
   Utility Classes
   ======================================== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus Styles for Accessibility */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Selection Styles */
::selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* Smooth Scrolling */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}