/* CSS Variables for Theme Management */
:root {
    --primary-color: #1e87f0;
    --secondary-color: #32d296;
    --accent-color: #faa05a;
    --text-primary: #333;
    --text-secondary: #666;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-card: #ffffff;
    --border-color: #e5e5e5;
    --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    --sun: orange;
}

/* Dark theme variables */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #ffffff;
        --text-secondary: #b0b0b0;
        --bg-primary: #1a1a1a;
        --bg-secondary: #2d2d2d;
        --bg-card: #2d2d2d;
        --border-color: #404040;
        --shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
        --sun: white;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: all 0.3s ease;
}

h2, h3, h4, h5 {
    color: var(--text-secondary) !important;
}

/* Custom UIkit overrides */
.uk-navbar-container {
    background-color: var(--bg-card) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    align-items: left;
}

.uk-navbar-nav > li > a {
    color: var(--text-primary) !important;
    text-transform: none;
    font-weight: 500;
}

.uk-navbar-nav > li:hover > a {
    color: var(--primary-color) !important;
}

.uk-card {
    background-color: var(--bg-card) !important;
    color: var(--text-primary) !important;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.uk-card iframe{
    width: 100% !important;
    height: 100% !important;
    background-color: #b0b0b0;
}

.uk-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.uk-text-meta {
    color: var(--text-secondary) !important;
}

@media (prefers-color-scheme: dark) {
    .uk-card:hover {
        box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    }
}

.profile-image {
    max-width: 450px;
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.uk-section {
    background-color: var(--bg-primary);
}

.uk-section-secondary {
    color: var(--text-primary) !important;
    background-color: var(--bg-secondary) !important;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.uk-label {
    background-color: transparent !important;
    color: var(--text-primary) !important;
}

.uk-button-default {
    color: var(--text-primary);
    background-color: transparent;
    border-color: var(--text-primary);
}

.uk-button-default:hover {
    color: var(--primary-color);
    background-color: transparent;
    border-color: var(--primary-color);
}

.uk-text-lead {
    color: var(--text-secondary) !important;
}

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

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="rgba(255,255,255,0.1)" points="0,0 1000,300 1000,1000 0,700"/></svg>');
    background-size: cover;
}

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

/* Skills Section */
.skill-item {
    text-align: center;
    padding: 2rem 1rem;
}

.skill-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

.project-card .uk-card-body {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-card .uk-card-footer {
    margin-top: auto;
}

/* Contact Section */
.contact-info {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive typography */
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    font-weight: 300;
}

/* Button styles */
.uk-button-primary {
    color: var(--text-primary);
    background-color: transparent;
    border-color: var(--text-primary);
}

.uk-button-secondary {
    color: var(--text-primary);
    background-color: transparent;
    border-color: var(--text-primary);
}

.uk-button-primary:hover {
    color: var(--text-primary);
    background-color: var(--secondary-color);
    border-color: var(--text-primary);
}

.uk-button-secondary:hover {
    color: var(--text-primary);
    background-color: var(--accent-color);
    border-color: var(--text-primary);
}

.uk-button-linkedin {
    background-color: transparent;
    color: var(--text-primary) !important;
    border: 1px solid var(--text-primary);
}

.uk-button-linkedin:hover {
    background-color: #0d65bf;
    color: white !important;
}

.button-pdf {
    color: var(--text-primary) !important;
    background-color: transparent;
    border: 1px solid var(--text-primary);
}

.button-pdf:hover {
    background-color: #F40F02;
    color: white !important;
}

.uk-button-text {
    text-transform: none;
    color: var(--text-primary);
}

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

/* Skills Page Styles */
.skills-container {
    transition: opacity 0.3s ease-in-out, min-height 0.3s ease-in-out;
    position: relative;
}

.skills-category {
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    position: relative;
    width: 100%;
}

.skills-category.active {
    display: block !important;
    opacity: 1 !important;
}

.skill-card {
    height: 150px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 12px;
    overflow: hidden;
}

.skill-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

@media (prefers-color-scheme: dark) {
    .skill-card:hover {
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    }
}

.skill-card .uk-card-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    padding: 1rem;
}

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 0.8rem;
    transition: transform 0.3s ease;
}

.skill-card:hover .skill-icon {
    transform: scale(1.1);
}

.skill-card .uk-card-title {
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
    line-height: 1.2;
    margin: 0;
    color: var(--text-primary) !important;
}

/* Tab Styles */
.uk-tab {
    justify-content: center;
    flex-wrap: wrap;
}

.uk-tab > li {
    margin-bottom: 0px;
    padding: 0px;
}

.uk-tab > li > a {
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    padding: 1rem 0rem;
    font-weight: 500;
    transition: all 0.3s ease;
    text-decoration: none;
}

.uk-tab > li.uk-active > a,
.uk-tab > li > a:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: var(--bg-card);
}

/* Responsive adjustments for skills grid */
@media (max-width: 640px) {
    .skill-card {
        height: 130px;
    }
    
    .skill-icon {
        font-size: 2rem;
        margin-bottom: 0.5rem;
    }
    
    .skill-card .uk-card-title {
        font-size: 0.8rem;
    }
    
    .uk-tab > li > a {
        padding: 0.8rem 1rem;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .uk-tab {
        justify-content: flex-start;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }
    
    .uk-tab > li {
        flex-shrink: 0;
    }
}

/* Animation for category switching */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.skills-category.active {
    animation: fadeInScale 0.4s ease-out;
}

/* Custom scrollbar for mobile tab navigation */
.uk-tab::-webkit-scrollbar {
    height: 4px;
}

.uk-tab::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.uk-tab::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 2px;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* ==========================================
   PROJECT PAGE STYLES (Formula Student)
   ========================================== */

/* Background patterns */
body {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(30, 135, 240, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(50, 210, 150, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(250, 160, 90, 0.03) 0%, transparent 50%);
    background-attachment: fixed;
}

/* Subtle grid pattern overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(30, 135, 240, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(30, 135, 240, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--bg-primary);
        background-image: 
            radial-gradient(circle at 20% 50%, rgba(30, 135, 240, 0.05) 0%, transparent 50%),
            radial-gradient(circle at 80% 80%, rgba(50, 210, 150, 0.05) 0%, transparent 50%),
            radial-gradient(circle at 40% 20%, rgba(250, 160, 90, 0.05) 0%, transparent 50%);
        background-attachment: fixed;
    }

    body::before {
        background-image: 
            linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    }
}

/* Premium styling enhancements */
.uk-card-hover {
    transition: transform 0.3s ease, box-shadow 0.3s ease !important;
}

.uk-card-hover:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
}

.uk-breadcrumb > * > * {
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.uk-breadcrumb > * > *:hover {
    color: var(--text-primary);
}

.uk-heading-medium {
    background: linear-gradient(135deg, #1e87f0 0%, #0f6ecd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Button enhancements for project pages */
.uk-button-primary {
    color: var(--text-primary) !important;
    background-color: transparent !important;
    border-color: var(--text-primary) !important;
    transition: all 0.3s ease !important;
}

.uk-button-primary:hover {
    color: var(--text-primary) !important;
    background-color: var(--secondary-color) !important;
    border-color: var(--text-primary) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 5px 15px rgba(30, 135, 240, 0.4) !important;
}

.uk-button-default {
    transition: all 0.3s ease !important;
}

.uk-button-default:hover {
    transform: translateY(-2px) !important;
}

/* Section background variations */
.uk-section-default {
    background-color: transparent;
}

.uk-section-muted {
    background-color: rgba(248, 249, 250, 0.6);
    backdrop-filter: blur(10px);
}

@media (prefers-color-scheme: dark) {
    [data-theme="dark"] .uk-heading-medium {
        background: linear-gradient(135deg, #3aa0ff 0%, #1e87f0 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .uk-section-muted {
        background-color: rgba(45, 45, 45, 0.6);
        backdrop-filter: blur(10px);
    }
}

/* Core Technologies Cards - Equal Heights */
.uk-card-small {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.uk-card-small .uk-text-small {
    flex-grow: 1;
}