.main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: fadeInFromTop 1.5s ease-in-out;
}
@keyframes fadeInFromTop {
    0% {
        opacity: 0;
        transform: translateY(-50px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}
#toggleSnow {
    display: block;
    margin: 20px auto;
    padding: 10px;
    font-size: 16px;
    border-radius: 5px;
    background-color: var(--background-color);
    cursor: pointer;
    outline: none;
}
.regin{
    position: relative;
    background: #007BFF;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    padding: 20px;
    max-width: 400px;
    margin: 20px auto;
    text-align: center;
    animation: fadeInFromTop 1.5s ease-in-out;
    cursor: pointer;
}
.welcome-message{
    font-size: 1.5rem;
    color: var(--text-color);
}
.learning-progress {
    margin: 40px 0;
    padding: 32px 0;
}
.year-cards {
    display: flex;
    flex-direction: column;
    gap: 32px;
    margin-top: 24px;
    color: var(--text-color);
    position: relative;
}

.year-cards::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 8px;
    background: rgba(102, 126, 234, 0.3);
    transform: translateX(-50%);
    z-index: 0;
    border-radius: 4px;
}

.year-card {
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.08);
    padding: 32px 40px;
    min-width: 220px;
    min-height: 180px;
    max-width: 420px;
    text-align: left;
    width: 100%;
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s cubic-bezier(.4,0,.2,1);
    position: relative;
    z-index: 1;
    background: var(--background-color, white);
}
.year-card.visible {
    opacity: 1;
    transform: translateX(0);
}
.year-card ul{
    margin: 0;
    padding: 0;
}
.year-card ul li a{
    color: var(--a-color);
}
.year-card:nth-child(even) {
    text-align: right;
    align-self: flex-end;
    transform: translateX(40px);
}

.year-card ul {
    text-align: left;
}

.year-card ul li {
    text-align: left;
}

.year-card.visible:nth-child(even) {
    transform: translateX(0);
}
@media screen and (max-width: 900px) {
    .main-image {
        padding-top: 0;
    }
    
    .year-cards::before {
        display: none;
    }
    
    .year-card,
    .year-card:nth-child(even) {
        text-align: center;
        align-self: center;
        transform: translateX(0);
        padding: 20px 5vw;
        min-width: 0;
        max-width: 98vw;
        width: 100%;
        box-sizing: border-box;
    }
}
@media screen and (min-width: 1201px){
    .main-image {
        padding-top: 20px;
    }
}
.language-cards {
    max-width: 100%;
    margin: 40px auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    padding: 20px;
    position: relative;
}

.lang-card {
    background: var(--background-color);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    padding: 32px 24px;
    text-align: center;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.lang-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-radius: 16px;
    z-index: 1;
    transition: opacity 0.3s ease;
    opacity: 0;
}

.lang-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.lang-card:hover {
    transform: translateY(-12px) scale(1.05);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 20px rgba(var(--primary-color), 0.2);
}

.lang-card:hover::before {
    opacity: 1;
}

.lang-card .icon-container {
    position: relative;
    display: inline-block;
    margin-bottom: 20px;
    z-index: 2;
}

.lang-card img {
    width: 56px;
    height: 56px;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
    z-index: 2;
    position: relative;
}

.lang-card:hover img {
    transform: scale(1.1) rotate(5deg);
}

.lang-card h3 {
    margin: 16px 0 12px 0;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-color);
    position: relative;
    z-index: 2;
}

.lang-card p {
    color: var(--text-color);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
    opacity: 0.8;
    position: relative;
    z-index: 2;
}

.lang-card.java { 
    border-top: 4px solid #f89820;
    background: linear-gradient(135deg, rgba(248, 152, 32, 0.05) 0%, rgba(248, 152, 32, 0.02) 100%);
}

.lang-card.c { 
    border-top: 4px solid #a8b9cc;
    background: linear-gradient(135deg, rgba(168, 185, 204, 0.05) 0%, rgba(168, 185, 204, 0.02) 100%);
}

.lang-card.cpp { 
    border-top: 4px solid #00599c;
    background: linear-gradient(135deg, rgba(0, 89, 156, 0.05) 0%, rgba(0, 89, 156, 0.02) 100%);
}

.lang-card.csharp { 
    border-top: 4px solid #239120;
    background: linear-gradient(135deg, rgba(35, 145, 32, 0.05) 0%, rgba(35, 145, 32, 0.02) 100%);
}

.lang-card.python { 
    border-top: 4px solid #3776ab;
    background: linear-gradient(135deg, rgba(55, 118, 171, 0.05) 0%, rgba(255, 212, 59, 0.02) 100%);
}

.lang-card.dart { 
    border-top: 4px solid #0175c2;
    background: linear-gradient(135deg, rgba(1, 117, 194, 0.05) 0%, rgba(1, 117, 194, 0.02) 100%);
}

.lang-card.javascript { 
    border-top: 4px solid #f7df1e;
    background: linear-gradient(135deg, rgba(247, 223, 30, 0.05) 0%, rgba(247, 223, 30, 0.02) 100%);
}

.lang-card.html { 
    border-top: 4px solid #e34f26;
    background: linear-gradient(135deg, rgba(227, 79, 38, 0.05) 0%, rgba(227, 79, 38, 0.02) 100%);
}

.lang-card.sql { 
    border-top: 4px solid #4479a1;
    background: linear-gradient(135deg, rgba(68, 121, 161, 0.05) 0%, rgba(68, 121, 161, 0.02) 100%);
}

@media (max-width: 768px) {
    .language-cards {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        padding: 16px;
    }
    
    .lang-card {
        padding: 24px 20px;
    }
    
    .lang-card img {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .language-cards {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 12px;
    }
    
    .lang-card {
        padding: 20px 16px;
    }
}

.lang-card {
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: calc(var(--animation-order, 0) * 0.1s);
}

.lang-card:nth-child(1) { --animation-order: 1; }
.lang-card:nth-child(2) { --animation-order: 2; }
.lang-card:nth-child(3) { --animation-order: 3; }
.lang-card:nth-child(4) { --animation-order: 4; }
.lang-card:nth-child(5) { --animation-order: 5; }
.lang-card:nth-child(6) { --animation-order: 6; }
.lang-card:nth-child(7) { --animation-order: 7; }
.lang-card:nth-child(8) { --animation-order: 8; }
.lang-card:nth-child(9) { --animation-order: 9; }

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

.icon-container::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 70px;
    height: 70px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(0);
    transition: transform 0.3s ease;
    z-index: 1;
}

.lang-card:hover .icon-container::after {
    transform: translate(-50%, -50%) scale(1);
}

.lang-card h3 {
    transition: color 0.3s ease, transform 0.3s ease;
}

.lang-card:hover h3 {
    transform: translateY(-2px);
}

.lang-card p {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.lang-card:hover p {
    opacity: 1;
    transform: translateY(-1px);
}

.dark-theme .lang-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.dark-theme .lang-card:hover {
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    }
    50% {
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    }
}

.lang-card:hover {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes iconRotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.lang-card.java:hover img { animation: iconRotate 0.8s ease-in-out; }
.lang-card.python:hover img { animation: iconRotate 0.8s ease-in-out; }
.lang-card.javascript:hover img { animation: iconRotate 0.8s ease-in-out; }

.snowflake {
    position: fixed;
    top: -30px;
    background: white;
    border-radius: 50%;
    pointer-events: none;
    box-shadow: 0 0 8px #fff, 0 0 2px #aaf;
    z-index: 10;    
    animation-name: snow-fall;
    animation-timing-function: linear;
    pointer-events: none;
    z-index: 9999;
    animation-duration: 5s;
    animation-iteration-count: infinite; 
    will-change: transform, opacity;
}

@keyframes snow-fall {
    0% {
        transform: translateY(0) rotate(0deg);
    }
    100% {
        transform: translateY(100vh) rotate(360deg);
        opacity: 0.5;
    }
}

.hero-section {
    display: flex;
    align-items: center;
    padding: 60px 20px;
    margin: 40px auto;
    max-width: 1200px;
    gap: 40px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102,126,234,0.1) 0%, transparent 70%);
    animation: backgroundMove 15s ease-in-out infinite;
    z-index: -1;
}

@keyframes backgroundMove {
    0%, 100% { transform: rotate(0deg) scale(1); }
    50% { transform: rotate(180deg) scale(1.1); }
}

.main-image {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.main-image:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 25px 50px rgba(0,0,0,0.3);
}

.hero-card {
    flex: 1;
    min-width: 0;
}

.hero-content {
    text-align: left;
    padding: 0;
    position: relative;
}

.hero-icon {
    margin-bottom: 20px;
    font-size: 3rem;
    opacity: 0.8;
}

.hero-title {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    line-height: 1.2;
}

.hero-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
    animation: titleUnderline 2s ease-out;
}

@keyframes titleUnderline {
    0% { width: 0; }
    100% { width: 60px; }
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 30px;
    line-height: 1.8;
    color: var(--text-color);
    opacity: 0.9;
    position: relative;
    padding-left: 20px;
}

.hero-description::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

.hero-actions {
    margin-top: 30px;
}

.snow-toggle-btn {
    border: 2px solid transparent;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.snow-toggle-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
    transition: left 0.5s ease;
}

.snow-toggle-btn:hover::before {
    left: 100%;
}

.snow-toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(102,126,234,0.4);
}

.btn-icon {
    font-size: 1.3rem;
    animation: iconSpin 3s ease-in-out infinite;
}

@keyframes iconSpin {
    0%, 100% { transform: rotate(0deg); }
    50% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .hero-section {
        flex-direction: column;
        text-align: center;
        padding: 40px 20px;
        gap: 30px;
    }
    
    .main-image {
        width: 400px;
        height: 250px;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
        padding-left: 0;
    }
    
    .hero-description::before {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 30px 15px;
        margin: 20px auto;
        gap: 20px;
    }
    
    .main-image {
        width: 200px;
        height: 200px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .snow-toggle-btn {
        padding: 12px 24px;
        font-size: 1rem;
    }
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-color);
    opacity: 0.8;
    margin: 0;
    font-weight: 400;
    line-height: 1.6;
}

@media (max-width: 768px) {
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .section-header {
        margin: 40px 0 30px 0;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
}

.skill-level {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 3;
}

.level-indicator {
    font-size: 0.9rem;
    color: #ffd700;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-weight: bold;
    letter-spacing: 2px;
    opacity: 0.9;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.lang-card:hover .level-indicator {
    opacity: 1;
    transform: scale(1.1);
}

.lang-card.python .level-indicator,
.lang-card.java .level-indicator,
.lang-card.javascript .level-indicator,
.lang-card.html .level-indicator,
.lang-card.c .level-indicator,
.lang-card.cpp .level-indicator,
.lang-card.csharp .level-indicator,
.lang-card.sql .level-indicator,.lang-card.dart .level-indicator {
    color: #ffd700;
    filter: drop-shadow(0 0 4px rgba(255, 215, 0, 0.6));
}

@keyframes twinkle {
    0%, 100% { opacity: 0.9; }
    50% { opacity: 1; }
}

.lang-card:hover .level-indicator {
    animation: twinkle 1.5s ease-in-out infinite;
}

.lang-card .card-details {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.7));
    color: white;
    padding: 16px;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    z-index: 5;
}

.lang-card:hover .card-details {
    transform: translateY(0);
}

.card-details h4 {
    margin: 0 0 8px 0;
    font-size: 0.9rem;
    color: #ffd700;
    font-weight: 600;
}

.card-details ul {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.8rem;
    line-height: 1.4;
}

.card-details li {
    margin: 4px 0;
    padding-left: 12px;
    position: relative;
}

.card-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #ffd700;
    font-size: 0.8rem;
}

.lang-card:hover .icon-container,
.lang-card:hover h3,
.lang-card:hover p {
    opacity: 0.3;
    transition: opacity 0.3s ease;
}

.lang-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 2px solid transparent;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.1)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: source-out;
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lang-card:hover::after {
    opacity: 1;
}

.lang-card.python:hover::after,
.lang-card.java:hover::after,
.lang-card.javascript:hover::after,
.lang-card.html:hover::after,
.lang-card.css:hover::after,
.lang-card.c:hover::after,
.lang-card.cpp:hover::after,
.lang-card.csharp:hover::after,
.lang-card.sql:hover::after,
.lang-card.dart:hover::after {
    background: linear-gradient(135deg, #3776ab, #ffd43b) border-box;
}

.lang-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.lang-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.language-cards {
    opacity: 0;
    animation: slideInFromBottom 1s ease-out 0.3s forwards;
}

@keyframes slideInFromBottom {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lang-card:nth-child(1) { animation-delay: 0.1s; }
.lang-card:nth-child(2) { animation-delay: 0.2s; }
.lang-card:nth-child(3) { animation-delay: 0.3s; }
.lang-card:nth-child(4) { animation-delay: 0.4s; }
.lang-card:nth-child(5) { animation-delay: 0.5s; }
.lang-card:nth-child(6) { animation-delay: 0.6s; }
.lang-card:nth-child(7) { animation-delay: 0.7s; }
.lang-card:nth-child(8) { animation-delay: 0.8s; }
.lang-card:nth-child(9) { animation-delay: 0.9s; }

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.lang-card.visible {
    animation: fadeInUp 0.8s ease forwards, float 6s ease-in-out infinite;
}

.lang-card.visible:nth-child(1) { animation-delay: 0s, 0s; }
.lang-card.visible:nth-child(2) { animation-delay: 0s, 0.5s; }
.lang-card.visible:nth-child(3) { animation-delay: 0s, 1s; }
.lang-card.visible:nth-child(4) { animation-delay: 0s, 1.5s; }
.lang-card.visible:nth-child(5) { animation-delay: 0s, 2s; }
.lang-card.visible:nth-child(6) { animation-delay: 0s, 2.5s; }
.lang-card.visible:nth-child(7) { animation-delay: 0s, 3s; }
.lang-card.visible:nth-child(8) { animation-delay: 0s, 3.5s; }
.lang-card.visible:nth-child(9) { animation-delay: 0s, 4s; }

:root {
    --card-hover-duration: 0.3s;
    --card-hover-timing: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.lang-card {
    transition: all var(--card-hover-duration) var(--card-hover-timing);
}

@media (prefers-reduced-motion: reduce) {
    .lang-card,
    .language-cards,
    .section-header h2::after {
        animation: none;
        transition: none;
    }
    
    .lang-card {
        opacity: 1;
        transform: none;
    }
    
    .language-cards {
        opacity: 1;
    }
}

.language-cards {
    perspective: 1000px;
}

.lang-card {
    transform-style: preserve-3d;
    backface-visibility: hidden;
    will-change: transform;
}

.lang-card:hover {
    transform: translateY(-12px) scale(1.05) rotateX(5deg) rotateY(2deg);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 20px rgba(var(--primary-color), 0.2);
}

.lang-card::before {
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.lang-card.python {
    background: linear-gradient(135deg, rgba(55, 118, 171, 0.03) 0%, rgba(255, 212, 59, 0.03) 100%);
}

.lang-card.java {
    background: linear-gradient(135deg, rgba(248, 152, 32, 0.03) 0%, rgba(237, 139, 0, 0.03) 100%);
}

.lang-card.javascript {
    background: linear-gradient(135deg, rgba(247, 223, 30, 0.03) 0%, rgba(240, 219, 79, 0.03) 100%);
}

.lang-card.csharp {
    background: linear-gradient(135deg, rgba(35, 145, 32, 0.03) 0%, rgba(46, 125, 50, 0.03) 100%);
}

.lang-card.cpp {
    background: linear-gradient(135deg, rgba(0, 89, 156, 0.03) 0%, rgba(25, 118, 210, 0.03) 100%);
}

.lang-card.html {
    background: linear-gradient(135deg, rgba(227, 79, 38, 0.03) 0%, rgba(255, 87, 34, 0.03) 100%);
}

.lang-card.sql {
    background: linear-gradient(135deg, rgba(68, 121, 161, 0.03) 0%, rgba(33, 150, 243, 0.03) 100%);
}

.lang-card.c {
    background: linear-gradient(135deg, rgba(168, 185, 204, 0.03) 0%, rgba(144, 164, 174, 0.03) 100%);
}

.lang-card.dart {
    background: linear-gradient(135deg, rgba(1, 117, 194, 0.03) 0%, rgba(33, 150, 243, 0.03) 100%);
}

.lang-card.loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 2s infinite;
}

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

@media (max-width: 1200px) {
    .language-cards {
        grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .language-cards {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 16px;
        padding: 16px 12px;
    }
    
    .lang-card {
        padding: 24px 18px;
    }
    
    .lang-card:hover {
        transform: translateY(-8px) scale(1.02);
    }
}

@media (max-width: 480px) {
    .language-cards {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 12px 8px;
    }
    
    .lang-card {
        padding: 20px 16px;
        margin: 0 4px;
    }
    
    .lang-card:hover {
        transform: translateY(-4px) scale(1.01);
    }
    
    .card-details {
        padding: 12px;
    }
    
    .card-details h4 {
        font-size: 0.8rem;
    }
    
    .card-details ul {
        font-size: 0.7rem;
    }
}

.dark-theme .lang-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.dark-theme .lang-card:hover {
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 20px rgba(var(--primary-color), 0.3);
}

@media print {
    .language-cards {
        display: block;
        page-break-inside: avoid;
    }
    
    .lang-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: 20px;
    }
    
    .card-details {
        position: static;
        transform: none;
        background: none;
        color: inherit;
        padding: 10px 0;
    }
    
    .skill-level {
        position: static;
        display: block;
        margin-bottom: 10px;
    }
}

@media (prefers-contrast: high) {
    .lang-card {
        border: 2px solid;
        background: var(--background-color);
    }
    
    .lang-card:hover {
        border-color: var(--primary-color);
    }
}

@media (prefers-reduced-motion: reduce) {
    .lang-card {
        transition: none;
    }
    
    .lang-card:hover {
        transform: none;
    }
}