/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Color Palette - Hacker Theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-terminal: #0d1117;
    --text-primary: #e0e0e0;
    --text-secondary: #8b949e;
    --accent-green: #00ff41;
    --accent-green-dim: #00cc33;
    --accent-cyan: #00d4ff;
    --accent-purple: #a855f7;
    --accent-red: #ff4757;
    --accent-yellow: #ffd93d;
    --border-color: #1e2430;

    /* Typography */
    --font-pixel: 'Press Start 2P', cursive;
    --font-terminal: 'VT323', monospace;

    /* Spacing */
    --section-padding: 100px 0;
    --container-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-terminal);
    font-size: 18px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   Matrix Background Canvas
   ======================================== */
#matrix-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.08;
}

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: var(--section-padding);
    position: relative;
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 15px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-brand {
    font-family: var(--font-pixel);
    font-size: 14px;
    color: var(--accent-green);
    display: flex;
    align-items: center;
    gap: 8px;
}

.terminal-prompt {
    color: var(--accent-cyan);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-links a {
    font-family: var(--font-terminal);
    font-size: 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-normal);
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-green);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-green);
    transition: var(--transition-normal);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--accent-green);
    transition: var(--transition-normal);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 20px 60px;
    position: relative;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

/* Avatar Styles */
.avatar-container {
    position: relative;
    width: 200px;
    height: 200px;
}

.avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-green);
    position: relative;
    z-index: 2;
    transition: var(--transition-normal);
}

.avatar:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(0, 255, 65, 0.4);
}

.avatar-glow {
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--accent-green), var(--accent-cyan));
    opacity: 0.3;
    animation: pulse-glow 2s ease-in-out infinite;
    z-index: 1;
}

@keyframes pulse-glow {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.3;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.5;
    }
}

.avatar-scanline {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: repeating-linear-gradient(0deg,
            transparent,
            transparent 2px,
            rgba(0, 255, 65, 0.03) 2px,
            rgba(0, 255, 65, 0.03) 4px);
    z-index: 3;
    pointer-events: none;
}

/* Hero Text */
.hero-text {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.typing-text {
    font-family: var(--font-terminal);
    font-size: 24px;
    color: var(--text-secondary);
}

.hero h1 {
    font-family: var(--font-pixel);
    font-size: 48px;
    color: var(--accent-green);
    text-shadow: 0 0 20px rgba(0, 255, 65, 0.5);
}

/* Glitch Effect */
.glitch {
    position: relative;
    animation: glitch-skew 3s infinite linear alternate-reverse;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    color: var(--accent-cyan);
    animation: glitch-effect 2s infinite linear alternate-reverse;
    clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
    transform: translate(-2px, 2px);
    opacity: 0.8;
}

.glitch::after {
    color: var(--accent-purple);
    animation: glitch-effect 3s infinite linear alternate-reverse;
    clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
    transform: translate(2px, -2px);
    opacity: 0.8;
}

@keyframes glitch-effect {
    0% {
        transform: translate(0);
    }

    20% {
        transform: translate(-3px, 3px);
    }

    40% {
        transform: translate(-3px, -3px);
    }

    60% {
        transform: translate(3px, 3px);
    }

    80% {
        transform: translate(3px, -3px);
    }

    100% {
        transform: translate(0);
    }
}

@keyframes glitch-skew {
    0% {
        transform: skew(0deg);
    }

    20% {
        transform: skew(-0.5deg);
    }

    40% {
        transform: skew(0.5deg);
    }

    60% {
        transform: skew(-0.5deg);
    }

    80% {
        transform: skew(0.5deg);
    }

    100% {
        transform: skew(0deg);
    }
}

.tagline {
    font-family: var(--font-terminal);
    font-size: 24px;
    color: var(--text-secondary);
}

.separator {
    color: var(--accent-green);
    margin: 0 10px;
}

/* Buttons */
.hero-buttons {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.btn {
    font-family: var(--font-pixel);
    font-size: 12px;
    padding: 15px 30px;
    text-decoration: none;
    border: 2px solid var(--accent-green);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: transparent;
    color: var(--accent-green);
}

.btn-primary:hover {
    background: var(--accent-green);
    color: var(--bg-primary);
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.btn-secondary:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.4);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    font-family: var(--font-terminal);
    font-size: 14px;
    color: var(--text-secondary);
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--accent-green);
    border-bottom: 2px solid var(--accent-green);
    transform: rotate(45deg);
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(10px);
    }
}

/* ========================================
   Section Title
   ======================================== */
.section-title {
    font-family: var(--font-pixel);
    font-size: 24px;
    color: var(--accent-green);
    margin-bottom: 50px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.section-title .terminal-prompt {
    color: var(--accent-cyan);
}

/* ========================================
   About Section
   ======================================== */
.about {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.terminal-window {
    background: var(--bg-terminal);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.terminal-header {
    background: var(--bg-secondary);
    padding: 12px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

.terminal-btn {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-btn.red {
    background: var(--accent-red);
}

.terminal-btn.yellow {
    background: var(--accent-yellow);
}

.terminal-btn.green {
    background: var(--accent-green);
}

.terminal-title {
    margin-left: 10px;
    font-family: var(--font-terminal);
    font-size: 14px;
    color: var(--text-secondary);
}

.terminal-body {
    padding: 25px;
}

.terminal-body p {
    margin-bottom: 15px;
    font-size: 20px;
}

.prompt {
    color: var(--accent-green);
    margin-right: 8px;
}

.output {
    color: var(--text-secondary);
    padding-left: 20px;
}

.highlight {
    color: var(--accent-cyan);
    font-weight: bold;
}

.cursor {
    color: var(--accent-green);
    animation: blink 1s step-end infinite;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    padding: 20px;
    margin-bottom: 20px;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    background: rgba(0, 255, 65, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    transition: var(--transition-normal);
}

.skill-item:hover {
    border-color: var(--accent-green);
    background: rgba(0, 255, 65, 0.1);
    transform: translateX(5px);
}

.skill-icon {
    font-size: 20px;
}

.skill-name {
    font-family: var(--font-terminal);
    font-size: 16px;
    color: var(--text-primary);
}

/* ========================================
   Competitions Section
   ======================================== */
.competitions {
    background: var(--bg-secondary);
}

.competitions-intro {
    font-family: var(--font-terminal);
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.competitions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.competition-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 25px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.competition-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-green), var(--accent-cyan));
    opacity: 0;
    transition: var(--transition-normal);
}

.competition-card:hover {
    border-color: var(--accent-green);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 255, 65, 0.1);
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-year {
    font-family: var(--font-terminal);
    font-size: 16px;
    color: var(--text-secondary);
}

.card-rank {
    font-family: var(--font-pixel);
    font-size: 12px;
    color: var(--accent-yellow);
    background: rgba(255, 217, 61, 0.1);
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid var(--accent-yellow);
}

.card-title {
    font-family: var(--font-pixel);
    font-size: 14px;
    color: var(--accent-green);
    margin-bottom: 12px;
    line-height: 1.5;
}

.card-description {
    font-family: var(--font-terminal);
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    font-family: var(--font-terminal);
    font-size: 14px;
    padding: 5px 12px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    border-radius: 3px;
    transition: var(--transition-fast);
}

.tag:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
}

/* ========================================
   Coin Animations for Rankings
   ======================================== */
.coin-container {
    position: absolute;
    top: -15px;
    right: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 10;
}

.coin-animation {
    font-size: 40px;
    animation: coinSpin 2s ease-in-out infinite, coinBounce 1s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.gold-coin .coin-animation {
    animation: coinSpin 2s ease-in-out infinite, coinBounce 1s ease-in-out infinite, goldGlow 1.5s ease-in-out infinite alternate;
}

.silver-coin .coin-animation {
    animation: coinSpin 2.5s ease-in-out infinite, coinBounce 1.2s ease-in-out infinite, silverGlow 1.5s ease-in-out infinite alternate;
}

.coin-label {
    font-family: var(--font-pixel);
    font-size: 10px;
    margin-top: 5px;
    padding: 3px 8px;
    border-radius: 10px;
}

.gold-coin .coin-label {
    color: #ffd700;
    background: rgba(255, 215, 0, 0.15);
    border: 1px solid #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.silver-coin .coin-label {
    color: #c0c0c0;
    background: rgba(192, 192, 192, 0.15);
    border: 1px solid #c0c0c0;
    text-shadow: 0 0 10px rgba(192, 192, 192, 0.5);
}

@keyframes coinSpin {

    0%,
    100% {
        transform: rotateY(0deg);
    }

    50% {
        transform: rotateY(180deg);
    }
}

@keyframes coinBounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

@keyframes goldGlow {
    0% {
        filter: drop-shadow(0 0 5px rgba(255, 215, 0, 0.5)) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    }

    100% {
        filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.8)) drop-shadow(0 0 40px rgba(255, 215, 0, 0.4)) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    }
}

@keyframes silverGlow {
    0% {
        filter: drop-shadow(0 0 5px rgba(192, 192, 192, 0.5)) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    }

    100% {
        filter: drop-shadow(0 0 15px rgba(192, 192, 192, 0.7)) drop-shadow(0 0 30px rgba(192, 192, 192, 0.3)) drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
    }
}

/* Card positioning for coin */
.competition-card {
    position: relative;
    overflow: visible;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-terminal);
    border-top: 1px solid var(--border-color);
    padding: 30px 20px;
    text-align: center;
}

.footer p {
    font-family: var(--font-terminal);
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.footer-note {
    font-size: 14px;
}

.heart {
    color: var(--accent-red);
    animation: heartbeat 1.5s ease infinite;
}

@keyframes heartbeat {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.2);
    }
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.98);
        flex-direction: column;
        align-items: center;
        padding: 30px 0;
        gap: 25px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-normal);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

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

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero h1 {
        font-size: 28px;
    }

    .avatar-container {
        width: 150px;
        height: 150px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .section-title {
        font-size: 18px;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }

    .competitions-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 22px;
    }

    .tagline {
        font-size: 18px;
    }

    .btn {
        font-size: 10px;
        padding: 12px 20px;
    }

    .card-title {
        font-size: 12px;
    }
}

/* ========================================
   Utility Classes
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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