@font-face {
    font-family: 'Smiley Sans';
    src: url('../fonts/SmileySans-Oblique.ttf.woff2') format('woff2');
    font-display: swap;
}

:root {
    --primary-color: #ffffff;
    --secondary-color: #f8f9fa;
    --text-color: #212529;
    --accent-color: #6c757d;
    --card-bg: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --transition-speed: 0.4s;
    --easing: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="dark"] {
    --primary-color: #121212;
    --secondary-color: #1e1e1e;
    --text-color: #e6e6e6;
    --accent-color: #a0a0a0;
    --card-bg: #1a1a1a;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

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

html, body {
    font-family: 'Smiley Sans', sans-serif;
    background-color: var(--primary-color);
    color: var(--text-color);
    overflow-x: hidden;
    height: 100%;
    transition: background-color 0.8s ease, color 0.8s ease;
}

.pages-container {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    transition: transform 0.8s var(--easing), opacity 0.8s var(--easing);
    transform: translateY(100vh);
    opacity: 0;
    background-color: var(--primary-color);
}

.page.active {
    transform: translateY(0);
    opacity: 1;
    z-index: 10;
}

.page.prev {
    transform: translateY(-100vh);
    opacity: 0;
}

.page.next {
    transform: translateY(100vh);
    opacity: 0;
}

.nav-dots {
    position: fixed;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 1rem;
    z-index: 100;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-color);
    opacity: 0.5;
    transition: opacity var(--transition-speed), transform var(--transition-speed);
    cursor: pointer;
}

.dot.active {
    opacity: 1;
    transform: scale(1.2);
}

.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    z-index: 1000;
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    transition: transform var(--transition-speed);
}

.theme-toggle:hover {
    transform: rotate(15deg);
}

#theme-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--primary-color);
    z-index: 9998;
    pointer-events: none;
    opacity: 0;
    transition: all 0.9s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
}

.theme-transitioning #theme-transition-overlay {
    opacity: 0.9;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.intro-container {
    display: flex;
    max-width: 1200px;
    width: 100%;
    gap: 4rem;
    align-items: center;
}

.profile {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 1.5rem;
    border: 3px solid var(--accent-color);
    box-shadow: 0 8px 16px var(--shadow-color);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 20px var(--shadow-color);
}

.name {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.bio {
    font-size: 1.2rem;
    line-height: 1.6;
    max-width: 400px;
    opacity: 0.8;
}

.design-element {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.geometric-shapes {
    position: relative;
    width: 350px;
    height: 350px;
    margin-left: -20px;
}

.triangle-guide {
    display: none;
}

.shape {
    position: absolute;
    border: 2px solid var(--accent-color);
    opacity: 0.6;
    transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: pointer;
    z-index: 2;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.shape:hover {
    opacity: 0.9;
    transform: translate(-50%, -50%) scale(1.15);
}

.shape-1 {
    width: 150px;
    height: 150px;
    border-radius: 50%;
}

.shape-2 {
    width: 100px;
    height: 100px;
    border-radius: 20px;
}

.shape-3 {
    width: 120px;
    height: 120px;
    border-radius: 60px 0 60px 0;
}

.skills-container {
    max-width: 1200px;
    width: 100%;
    text-align: center;
    padding: 2rem 0;
    position: relative;
    z-index: 2;
}

.skills-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 600;
    position: relative;
    z-index: 2;
}

.background-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.deco-circle {
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 2px solid var(--accent-color);
    top: 20%;
    left: 10%;
    animation: float 6s ease-in-out infinite;
    opacity: 0.1;
}

.deco-square {
    position: absolute;
    width: 120px;
    height: 120px;
    border: 2px solid var(--accent-color);
    bottom: 15%;
    right: 8%;
    animation: float 8s ease-in-out infinite alternate;
    opacity: 0.1;
}

.deco-triangle {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 80px solid transparent;
    border-right: 80px solid transparent;
    border-bottom: 140px solid var(--accent-color);
    top: 60%;
    left: 5%;
    opacity: 0.08;
    animation: rotate 20s linear infinite;
}

.deco-dots {
    position: absolute;
    display: flex;
    gap: 15px;
    top: 25%;
    right: 15%;
    animation: pulse 4s ease-in-out infinite;
}

.deco-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-color);
    opacity: 0.1;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(5deg);
    }
}

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

@keyframes pulse {
    0%, 100% {
        opacity: 0.05;
        transform: scale(1);
    }
    50% {
        opacity: 0.1;
        transform: scale(1.1);
    }
}

.cards-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.card {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 10px 20px var(--shadow-color);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.card-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    opacity: 0.8;
    color: var(--accent-color);
}

.card-title {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    font-weight: 600;
    text-align: center;
    color: var(--text-color);
}

.card-desc {
    margin-bottom: 1.5rem;
    flex-grow: 1;
    opacity: 0.8;
    line-height: 1.6;
    font-size: 0.9rem;
    text-align: center;
}

.card-btn {
    background-color: transparent;
    border: 2px solid var(--accent-color);
    color: var(--text-color);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    font-family: 'Smiley Sans', sans-serif;
    font-size: 0.9rem;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    text-decoration: none;
    display: inline-block;
    margin-top: auto;
    text-align: center;
}

.card-btn:hover {
    background-color: var(--accent-color);
    color: var(--primary-color);
}

.mobile-cards-container {
    display: none;
    width: 100%;
    max-width: 400px;
    margin: 2rem auto;
    position: relative;
    z-index: 2;
}

.cards-viewport {
    width: 100%;
    position: relative;
    margin-bottom: 2rem;
    height: 260px;
}

.cards-wrapper {
    display: flex;
    position: relative;
    height: 100%;
}

.mobile-card {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 15px 30px var(--shadow-color);
    display: flex;
    flex-direction: column;
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1;
    opacity: 0;
    transform: scale(0.95) translateY(20px);
}

.mobile-card.active {
    opacity: 1;
    transform: scale(1) translateY(0);
    z-index: 3;
}

.mobile-card.exiting {
    opacity: 0;
    transform: scale(0.95) translateY(-20px);
}

.cards-navigation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 1rem;
}

.nav-btn {
    background: var(--card-bg);
    border: 2px solid var(--accent-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-color);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.nav-btn:hover {
    background: var(--accent-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-color);
}

.nav-btn:active {
    transform: translateY(0);
}

.nav-btn svg {
    width: 20px;
    height: 20px;
}

.cards-counter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    color: var(--text-color);
    opacity: 0.8;
    font-weight: 500;
    position: relative;
    height: 24px;
}

.current-card {
    color: var(--accent-color);
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.counter-divider {
    opacity: 0.5;
}

.contact-container {
    max-width: 1200px;
    width: 100%;
    text-align: center;
    padding: 2rem 0;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
}

.contact-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 600;
    position: relative;
    z-index: 2;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.contact-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 10px 20px var(--shadow-color);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--shadow-color);
}

.contact-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 1.5rem;
    opacity: 0.8;
}

.contact-info {
    font-size: 1.4rem;
    margin-bottom: 0;
    line-height: 1.6;
    color: var(--accent-color);
    font-weight: 500;
}

footer {
    text-align: center;
    padding: 3rem 2rem 6rem;
    color: var(--text-color);
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: auto;
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.8;
}

.signature {
    font-size: 0.9rem;
    opacity: 0.9;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@media (max-width: 1200px) {
    .cards-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 900px) {
    .intro-container {
        gap: 2rem;
    }
    
    .cards-container {
        grid-template-columns: repeat(2, 1fr);
        max-width: 600px;
    }
}

@media (max-width: 768px) {
    .intro-container {
        flex-direction: column;
        text-align: center;
    }
    
    .design-element {
        display: none;
    }
    
    .cards-container {
        display: none;
    }
    
    .mobile-cards-container {
        display: block;
    }
    
    .skills-title {
        margin-bottom: 2rem;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
        max-width: 340px;
    }
    
    .nav-dots {
        right: 1rem;
    }
    
    .theme-toggle {
        top: 1rem;
        right: 1rem;
    }
    
    .contact-card {
        padding: 2rem;
    }

    .mobile-card {
        padding: 1.5rem;
        justify-content: space-between;
    }

    .mobile-card .card-title {
        margin-bottom: 1.2rem;
    }

    .mobile-card .card-desc {
        margin-bottom: 2rem;
    }

    .mobile-card .card-btn {
        margin-top: auto;
        margin-bottom: 0.5rem;
    }

    .nav-btn {
        width: 45px;
        height: 45px;
    }

    .deco-circle,
    .deco-triangle {
        display: none;
    }

    .deco-square {
        width: 80px;
        height: 80px;
        bottom: 10%;
        right: 5%;
    }

    .deco-dots {
        top: 15%;
        right: 10%;
    }
}

@media (max-width: 480px) {
    .page {
        padding: 1.5rem;
    }
    
    .avatar {
        width: 150px;
        height: 150px;
    }
    
    .name {
        font-size: 2rem;
    }
    
    .bio {
        font-size: 1rem;
    }
    
    .skills-title, .contact-title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }
    
    .contact-info {
        font-size: 1.2rem;
    }
    
    footer {
        padding: 2rem 1.5rem 4rem;
    }

    .mobile-card {
        padding: 1.2rem;
        height: 250px;
    }

    .mobile-card .card-title {
        margin-bottom: 1rem;
        font-size: 1.2rem;
    }

    .mobile-card .card-desc {
        margin-bottom: 1.8rem;
        font-size: 0.85rem;
    }

    .mobile-card .card-btn {
        margin-bottom: 0.8rem;
        padding: 0.5rem 1.2rem;
    }

    .cards-viewport {
        height: 240px;
    }

    .cards-navigation {
        gap: 1.5rem;
    }

    .nav-btn {
        width: 40px;
        height: 40px;
    }

    .nav-btn svg {
        width: 18px;
        height: 18px;
    }

    .cards-counter {
        font-size: 1rem;
    }

    .background-decoration {
        opacity: 0.05;
    }
}