/**
 * Bryan Portfolio - Main Stylesheet
 * Mobile-first responsive design
 */

/* ============================================
   CSS Variables (Design Tokens)
   ============================================ */
:root {
    /* Light theme (default) - Licht grijs met rode accenten */
    --color-primary: #ff6b6b;        /* Licht rood accent */
    --color-primary-dark: #ee5a6f;
    --color-primary-light: #ff8787;
    --color-text: #374151;           /* Donker grijs tekst */
    --color-text-light: #6b7280;
    --color-bg: #f3f4f6;             /* Licht grijs achtergrond */
    --color-bg-light: #e5e7eb;       /* Lichtere grijze achtergrond */
    --color-border: #d1d5db;         /* Lichte borders */
    --color-success: #10b981;
    --color-error: #f87171;
    --color-warning: #f59e0b;
    
    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-bg: var(--color-bg-light);
    --sidebar-text: var(--color-text);
    
    /* Spacing (8px base unit) */
    --spacing-xs: 0.5rem;   /* 8px */
    --spacing-sm: 1rem;     /* 16px */
    --spacing-md: 1.5rem;   /* 24px */
    --spacing-lg: 2rem;     /* 32px */
    --spacing-xl: 3rem;     /* 48px */
    --spacing-2xl: 4rem;    /* 64px */
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 1rem;      /* 16px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-lg: 1.125rem;      /* 18px */
    --font-size-xl: 1.25rem;       /* 20px */
    --font-size-2xl: 1.5rem;       /* 24px */
    --font-size-3xl: 2rem;         /* 32px */
    --font-size-4xl: 2.5rem;        /* 40px */
    --line-height-base: 1.6;
    --line-height-tight: 1.2;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 0.5rem;
    --border-radius-sm: 0.25rem;
    --border-radius-lg: 1rem;
    
    /* 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: all 0.3s ease;
}

/* ============================================
   Dark Theme
   ============================================ */
[data-theme="dark"] {
    --color-primary: #ff6b6b;        /* Licht rood accent (zelfde als light) */
    --color-primary-dark: #ee5a6f;
    --color-primary-light: #ff8787;
    --color-text: #e5e7eb;           /* Licht grijs tekst */
    --color-text-light: #9ca3af;
    --color-bg: #111827;             /* Donkere achtergrond */
    --color-bg-light: #1f2937;       /* Lichtere donkere achtergrond */
    --color-border: #374151;         /* Donkere borders */
    --color-success: #34d399;
    --color-error: #f87171;
    --color-warning: #fbbf24;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Admin pages - geen sidebar layout */
/* Fallback voor browsers zonder :has() support */
body.admin-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

body.admin-page .main-content,
body:not(:has(.app-wrapper)) .main-content {
    margin-left: 0 !important;
    width: 100% !important;
    padding: 0 !important;
}

/* Hide sidebar on admin pages */
body.admin-page .sidebar,
body:not(:has(.app-wrapper)) .sidebar {
    display: none !important;
}

/* ============================================
   App Wrapper (Sidebar + Main Content)
   ============================================ */
.app-wrapper {
    display: flex;
    min-height: 100vh;
    position: relative;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl) var(--spacing-lg);
    transition: var(--transition);
    width: calc(100% - var(--sidebar-width));
}

/* ============================================
   Sidebar (vCard Style)
   ============================================ */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

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

/* Sidebar Toggle (Mobile) */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    z-index: 1001;
    background: var(--color-primary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    cursor: pointer;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-xs);
    transition: var(--transition);
}

.sidebar-toggle span {
    width: 20px;
    height: 2px;
    background: white;
    transition: var(--transition);
    display: block;
}

.sidebar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.sidebar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.sidebar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Profile Section */
.sidebar-profile {
    text-align: center;
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.profile-image {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    overflow: hidden;
    border: 3px solid var(--color-primary);
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-image.placeholder {
    background: var(--color-primary);
    color: white;
    font-size: var(--font-size-4xl);
}

.profile-name {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.profile-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.sidebar-socials {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.sidebar-socials .social-link {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: var(--transition);
    font-size: var(--font-size-base);
}

.sidebar-socials .social-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* Navigation */
.sidebar-nav {
    flex: 1;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    color: var(--color-text);
    transition: var(--transition);
    text-decoration: none;
    font-weight: 500;
}

.nav-item i {
    width: 20px;
    text-align: center;
    font-size: var(--font-size-lg);
}

.nav-item:hover {
    background: var(--color-bg);
    color: var(--color-primary);
    transform: translateX(4px);
}

.nav-item.active {
    background: var(--color-primary);
    color: white;
}

.nav-item.active:hover {
    background: var(--color-primary-dark);
    transform: translateX(4px);
}

/* Social Media Section (replaces Contact Info) */
.sidebar-socials-section {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.sidebar-socials-list {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.sidebar-socials-list .social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: var(--transition);
    font-size: var(--font-size-base);
    text-decoration: none;
}

.sidebar-socials-list .social-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* Sidebar Actions */
.sidebar-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

/* Theme Toggle Switch */
.theme-toggle {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
    cursor: pointer;
}

.theme-toggle-input {
    opacity: 0;
    width: 0;
    height: 0;
}

.theme-switch-slider {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-border);
    border-radius: 26px;
    transition: var(--transition);
    cursor: pointer;
}

.theme-switch-slider:before {
    content: "";
    position: absolute;
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.theme-toggle-input:checked + .theme-switch-slider {
    background-color: var(--color-primary);
}

.theme-toggle-input:checked + .theme-switch-slider:before {
    transform: translateX(24px);
}

.theme-toggle:hover .theme-switch-slider {
    box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* Language Dropdown */
.sidebar-language-dropdown {
    flex: 1;
    max-width: 150px;
}

.language-select {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition);
}

.language-select:hover {
    border-color: var(--color-primary);
}

.language-select:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Mobile Only */
.mobile-only {
    display: none;
}

/* ============================================
   Responsive - Mobile
   ============================================ */
@media (max-width: 767px) {
    .mobile-only {
        display: block;
    }
    
    .sidebar {
        transform: translateX(-100%);
        box-shadow: var(--shadow-lg);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: var(--spacing-lg) var(--spacing-md);
        padding-top: calc(var(--spacing-xl) + 60px);
    }
    
    .sidebar-toggle {
        display: flex;
    }
    
    .sidebar-overlay {
        display: block;
    }
}

/* ============================================
   Responsive - Tablet
   ============================================ */
@media (min-width: 768px) and (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }
    
    .main-content {
        padding: var(--spacing-lg);
    }
}

/* ============================================
   Dark Theme Sidebar
   ============================================ */
[data-theme="dark"] {
    --sidebar-bg: var(--color-bg-light);
}

[data-theme="dark"] .sidebar {
    border-right-color: var(--color-border);
}

[data-theme="dark"] .nav-item.active {
    background: var(--color-primary);
    color: white;
}

/* Theme switch active state (already defined above) */

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-tight);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover, a:focus {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

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

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

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

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Header & Navigation
   ============================================ */
.site-header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(243, 244, 246, 0.95);
}

[data-theme="dark"] .site-header.scrolled {
    background-color: rgba(17, 24, 39, 0.95);
}

.main-nav {
    padding: var(--spacing-sm) 0;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    letter-spacing: -0.5px;
}

.logo:hover {
    text-decoration: none;
    color: var(--color-primary);
    transform: scale(1.05);
}

.nav-menu {
    display: none;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    position: relative;
    text-decoration: none;
    font-size: var(--font-size-sm);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-link:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

.nav-link.active::after {
    width: 80%;
}

.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    transition: var(--transition);
}

.mobile-menu-toggle:hover {
    opacity: 0.7;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
    display: block;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-left: auto;
}

/* Header Language Dropdown */
.header-language-dropdown {
    position: relative;
}

.header-language-dropdown .language-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition);
}

.header-language-dropdown .language-select:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-light);
}

.header-language-dropdown .language-select:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Hero Section
   ============================================ */
.hero-section {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
}

.hero-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.hero-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.hero-bio {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.hero-experience {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    line-height: 1.5;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    text-decoration: none;
    color: white;
}

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

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ============================================
   Skills Section
   ============================================ */
.skills-section {
    padding: var(--spacing-2xl) 0;
}

.skills-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--color-border);
    background-color: var(--color-bg);
    color: var(--color-text);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: var(--font-size-sm);
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.skill-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.skill-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-sm);
}

.skill-name {
    font-size: var(--font-size-lg);
    margin: 0;
}

.skill-category {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    background-color: var(--color-bg-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

.skill-description {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.skill-level {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.skill-level-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.skill-level-dots {
    display: flex;
    gap: 4px;
}

.level-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-border);
    transition: var(--transition);
}

.level-dot.active {
    background-color: var(--color-primary);
}

.skill-level-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
}

/* ============================================
   Projects Section
   ============================================ */
.projects-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-light);
}

.projects-filter {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.project-logo {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
}

.project-logo img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
}

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

.project-title {
    font-size: var(--font-size-xl);
    margin: 0;
}

.project-description {
    color: var(--color-text-light);
    flex: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-bg-light);
    color: var(--color-primary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--color-border);
}

.project-link {
    align-self: flex-start;
    margin-top: auto;
}

.external-icon {
    display: inline-block;
    margin-left: var(--spacing-xs);
}

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    padding: var(--spacing-2xl) 0;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-light);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.contact-icon {
    font-size: var(--font-size-2xl);
    flex-shrink: 0;
}

.contact-label {
    font-weight: 600;
    min-width: 100px;
}

.contact-link {
    color: var(--color-primary);
    word-break: break-all;
}

.contact-value {
    color: var(--color-text);
    word-break: break-all;
}

/* ============================================
   Main Content
   ============================================ */
#main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ============================================
   Highlights Section (Home)
   ============================================ */
.highlights-section {
    padding: var(--spacing-2xl) 0;
}

.highlights-block {
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

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

.skills-preview,
.projects-preview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.skill-preview-card,
.project-preview-card {
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    text-align: center;
    transition: var(--transition);
}

.skill-preview-card:hover,
.project-preview-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.skill-preview-card h3,
.project-preview-card h3 {
    font-size: var(--font-size-lg);
    margin: 0 0 var(--spacing-xs);
}

.skill-preview-card .skill-category {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
}

.project-preview-card img {
    width: 100%;
    max-width: 100px;
    height: auto;
    margin: 0 auto var(--spacing-sm);
    border-radius: var(--border-radius-sm);
}

/* ============================================
   About Section
   ============================================ */
.about-section {
    padding: var(--spacing-2xl) 0;
    flex: 1;
    display: flex;
    align-items: center;
}

.about-section .section-container {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content {
    margin-bottom: var(--spacing-xl);
}

.about-bio {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-base);
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto;
    text-align: left;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat-card {
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    min-width: 200px;
    text-align: center;
}

.stat-card h3 {
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    margin: 0 0 var(--spacing-xs);
}

.stat-card p {
    color: var(--color-text-light);
    margin: 0;
    font-size: var(--font-size-sm);
}

.about-location {
    margin-top: var(--spacing-lg);
    color: var(--color-text-light);
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    background-color: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-top: auto;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.footer-socials {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    font-size: var(--font-size-lg);
}

.social-link:hover {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
    text-decoration: none;
}

.social-link:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.footer-text {
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-text-light);
}

.footer-text p {
    margin: 0;
    line-height: var(--line-height-base);
}

.footer-copyright {
    margin-top: var(--spacing-sm);
    color: var(--color-text-light);
}

.footer-copyright p {
    margin: 0;
}

/* ============================================
   Loading Screen
   ============================================ */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.fade-out {
    opacity: 0;
    visibility: hidden;
}

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

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ============================================
   Mouse Trail
   ============================================ */
.mouse-trail-dot {
    position: fixed;
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9998;
    display: none;
    transition: transform 0.1s ease, opacity 0.1s ease;
    will-change: transform, opacity;
}

/* ============================================
   Hover Animations
   ============================================ */
.skill-card,
.project-card,
.skill-preview-card,
.project-preview-card {
    transition: var(--transition);
    will-change: transform, box-shadow;
}

.skill-card:hover,
.project-card:hover,
.skill-preview-card:hover,
.project-preview-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.btn {
    position: relative;
    overflow: hidden;
    will-change: transform;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: scale(1.05);
}

.social-link {
    will-change: transform, background-color;
}

.social-link:hover {
    transform: translateY(-3px) scale(1.1);
}

/* Image hover effects */
.project-logo img,
.project-preview-card img {
    transition: var(--transition);
    will-change: transform;
}

.project-card:hover .project-logo img,
.project-preview-card:hover img {
    transform: scale(1.05);
}

/* Icon hover effects */
.social-link i,
.contact-icon {
    transition: var(--transition);
}

.social-link:hover i {
    transform: rotate(5deg) scale(1.1);
}

/* ============================================
   Scroll Animations
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   Utility Classes
   ============================================ */
.no-content {
    text-align: center;
    color: var(--color-text-light);
    padding: var(--spacing-xl);
}

.hidden {
    display: none !important;
}

/* ============================================
   Mobile Menu
   ============================================ */
@media (max-width: 767px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 99;
    }
    
    .nav-menu.mobile-open {
        display: flex;
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-link {
        display: block;
        padding: var(--spacing-sm);
        width: 100%;
        text-align: center;
    }
}

/* ============================================
   Responsive Design - Tablet
   ============================================ */
@media (min-width: 768px) {
    .nav-menu {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: none;
    }
    
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
    
    .section-container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   Responsive Design - Desktop
   ============================================ */
@media (min-width: 1024px) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .section-container {
        padding: 0 var(--spacing-lg);
    }
}

/* ============================================
   vCard Style Components
   ============================================ */

/* Main Content Styling */
.main-content {
    max-width: 1000px;
    margin: 0 auto;
}

/* Section Styling */
.vcard-section {
    padding: var(--spacing-2xl) 0;
}

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

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.section-title i {
    color: var(--color-primary);
}

.section-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Cards */
.card {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

/* Grid Layouts */
.grid {
    display: grid;
    gap: var(--spacing-lg);
    grid-template-columns: 1fr;
}

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

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

/* Hero Section */
.vcard-hero {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-name {
    color: var(--color-primary);
    display: block;
    font-size: var(--font-size-4xl);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-base);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

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

.btn-secondary {
    background: var(--color-bg-light);
    color: var(--color-text);
    border-color: var(--color-border);
}

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

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
}

/* Highlights Section */
.highlights-section {
    padding: var(--spacing-2xl) 0;
}

.highlights-block {
    margin-bottom: var(--spacing-2xl);
}

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

.section-footer {
    text-align: center;
    margin-top: var(--spacing-xl);
}

/* Project Preview Cards */
.project-preview-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.project-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--spacing-md);
}

.project-info h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.project-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin: 0;
}

/* Skill Preview Cards */
.skill-preview-card {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.skill-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
}

.skill-info {
    flex: 1;
}

.skill-info h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.skill-category {
    display: inline-block;
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    background: rgba(255, 107, 107, 0.1);
    padding: 2px 8px;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-xs);
}

.skill-level {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.skill-level-bar {
    flex: 1;
    height: 6px;
    background: var(--color-bg);
    border-radius: 3px;
    overflow: hidden;
}

.skill-level-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.skill-level-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    min-width: 35px;
}

/* About Section */
.about-content {
    margin-bottom: var(--spacing-xl);
}

.about-bio {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text);
    margin: 0;
}

.about-stats {
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    text-align: center;
    padding: var(--spacing-xl);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: var(--font-size-2xl);
}

.stat-value {
    font-size: var(--font-size-4xl);
    color: var(--color-primary);
    margin: 0 0 var(--spacing-xs);
    font-weight: 700;
}

.stat-label {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin: 0;
}

.about-location {
    margin-top: var(--spacing-lg);
}

.location-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.location-content i {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-top: 4px;
}

.location-content strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.location-content p {
    margin: 0;
    color: var(--color-text-light);
}

/* Resume Section */
.resume-section {
    padding: var(--spacing-2xl) 0;
}

.resume-block {
    margin-bottom: var(--spacing-2xl);
}

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

.resume-block-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text);
}

.resume-block-title i {
    color: var(--color-primary);
}

.skill-category-group {
    margin-bottom: var(--spacing-xl);
}

.category-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

.skills-grid {
    display: grid;
    gap: var(--spacing-md);
    grid-template-columns: 1fr;
}

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

.skill-item {
    padding: var(--spacing-md);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.skill-header h4 {
    font-size: var(--font-size-base);
    margin: 0;
    font-weight: 600;
}

.skill-level-badge {
    background: var(--color-primary);
    color: white;
    padding: 2px 8px;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.skill-progress {
    margin-bottom: var(--spacing-sm);
}

.skill-progress-bar {
    height: 8px;
    background: var(--color-bg);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: 4px;
    transition: width 0.3s ease;
}

.skill-description {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin: 0;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-xl);
    padding-left: var(--spacing-xl);
}

.timeline-marker {
    position: absolute;
    left: -24px;
    top: var(--spacing-md);
    width: 16px;
    height: 16px;
    background: var(--color-primary);
    border: 3px solid var(--color-bg);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--color-primary);
}

.timeline-content h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

.timeline-period {
    display: inline-block;
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    background: rgba(255, 107, 107, 0.1);
    padding: 4px 12px;
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
}

.timeline-content p {
    color: var(--color-text-light);
    margin: 0;
}

/* Projects & Contact Sections */
.projects-section,
.contact-section {
    padding: var(--spacing-2xl) 0;
}