@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #E0E0E0;
    --primary-container: #404040;
    --on-primary: #0A0A0A;
    --on-primary-container: #F5F5F5;
    
    --accent: #FFFFFF;
    --accent-hover: #D0D0D0;
    
    --surface: #1A1A1A;
    --surface-container: #242424;
    --surface-container-high: #2E2E2E;
    --surface-container-highest: #383838;
    --on-surface: #E8E8E8;
    --on-surface-variant: #B8B8B8;
    
    --outline: #606060;
    --outline-variant: #3A3A3A;
    
    --background: #0F0F0F;
    --on-background: #E8E8E8;
    
    --elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.3), 0px 1px 2px 0px rgba(0, 0, 0, 0.5);
    --elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.3), 0px 1px 2px 0px rgba(0, 0, 0, 0.5);
    --elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.3), 0px 1px 3px 0px rgba(0, 0, 0, 0.5);
    --elevation-4: 0px 6px 10px 4px rgba(0, 0, 0, 0.3), 0px 2px 3px 0px rgba(0, 0, 0, 0.5);
    --elevation-5: 0px 8px 12px 6px rgba(0, 0, 0, 0.3), 0px 4px 4px 0px rgba(0, 0, 0, 0.5);
}

*, *::before, *::after {
    box-sizing: border-box;
}

* {
    font-family: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

html, body {
    height: auto;
    overflow-x: hidden;
    width: 100vw;
}

body {
    background: var(--background);
    color: var(--on-background);
    max-width: 100vw;
    overflow-x: hidden;
    min-height: 100vh;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link {
    color: var(--on-surface-variant);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--surface-container-high);
    color: var(--primary);
    transform: translateY(-2px);
}

.lang-toggle {
    background: var(--surface-container-high);
    color: var(--on-surface);
    border: 1px solid var(--outline-variant);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 14px;
}

.lang-toggle:hover {
    background: var(--primary-container);
    border-color: var(--outline);
    transform: translateY(-2px);
}

.social-icon {
    background: var(--surface-container-high) !important;
    color: var(--on-surface) !important;
    border: 1px solid var(--outline-variant);
    box-shadow: var(--elevation-2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
}

.social-icon:hover {
    background: var(--primary-container) !important;
    color: var(--on-primary-container) !important;
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--elevation-4);
    border-color: var(--outline);
}

.text-accent {
    color: var(--accent);
    font-weight: 700;
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: materialFadeIn 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.fade-in-delay-1 {
    animation-delay: 0.2s;
}

.fade-in-delay-2 {
    animation-delay: 0.4s;
}

.fade-in-delay-3 {
    animation-delay: 0.6s;
}

@keyframes materialFadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.typing-text {
    overflow: hidden;
    white-space: nowrap;
    border-right: 3px solid var(--accent);
    padding-right: 4px;
    border-radius: 2px;
    animation: materialBlink 1s infinite;
}

@keyframes materialBlink {
    0%, 50% {
        border-color: var(--accent);
    }
    51%, 100% {
        border-color: transparent;
    }
}

.bio-card {
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--elevation-2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.bio-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--elevation-3);
    border-color: var(--outline);
}

.bio-placeholder {
    background: var(--surface-container-high);
    border: 2px dashed var(--outline-variant);
    border-radius: 12px;
    padding: 20px;
    position: relative;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
}

.skill-tag {
    background: var(--surface-container-high);
    border: 1px solid var(--outline-variant);
    border-radius: 16px;
    padding: 8px 16px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-tag:hover {
    background: var(--primary-container);
    color: var(--on-primary-container);
    transform: scale(1.05);
    border-color: var(--outline);
}

.project-card {
    background: var(--surface-container);
    border: 1px solid var(--outline-variant);
    border-radius: 20px;
    padding: 24px;
    box-shadow: var(--elevation-2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.project-status {
    background: var(--primary-container);
    color: var(--on-primary-container);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.project-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.project-link {
    background: var(--surface-container-high);
    color: var(--on-surface);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--outline-variant);
}

.project-link:hover {
    background: var(--primary-container);
    color: var(--on-primary-container);
    transform: translateY(-2px);
    border-color: var(--outline);
}

.falling-icons {
    will-change: transform;
    margin-bottom: 1.5rem;
    padding: 16px;
    background: var(--surface-container);
    border-radius: 28px;
    border: 1px solid var(--outline-variant);
    box-shadow: var(--elevation-3);
    backdrop-filter: blur(20px);
}

.notube-icon .notube-svg .notube-n {
    transition: filter 0.3s, text-shadow 0.3s;
}

.notube-icon:hover .notube-svg .notube-n {
    filter: brightness(1.5) drop-shadow(0 0 8px #FFFFFF);
}

@media (max-width: 768px) {
    .nav-link {
        display: none;
    }
    
    .nav-link:first-child {
        display: block;
    }
    
    .bio-card, .project-card {
        padding: 20px;
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }
    
    .project-links {
        flex-direction: column;
    }
}

@media (max-width: 640px) {
    .falling-icons {
        animation: none !important;
        transform: none !important;
        margin-bottom: 1.5rem;
        border-radius: 20px;
        padding: 12px;
    }
    
    .social-icon {
        width: 56px !important;
        height: 56px !important;
        font-size: 1.5rem !important;
    }
}

.social-icon:focus, .nav-link:focus, .project-link:focus, .lang-toggle:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

::selection {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

::-moz-selection {
    background: var(--primary-container);
    color: var(--on-primary-container);
}

section {
    scroll-margin-top: 80px;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}