/* Reset e Variáveis */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Futuristic Theme */
    --primary-color: #0a0e27;
    --secondary-color: #00d9ff;
    --accent-color: #00ff88;
    --accent-purple: #b744ff;
    --bg-color: #0f1419;
    --code-bg: #1a1f2e;
    --border-color: #1e2738;
    --border-glow: #00d9ff;
    --text-color: #e8eaed;
    --text-light: #9ca3af;
    --header-bg: linear-gradient(135deg, #0a0e27 0%, #1a1f2e 50%, #0f1419 100%);
    --card-bg: #151b2b;
    --glow-cyan: 0 0 10px rgba(0, 217, 255, 0.5), 0 0 20px rgba(0, 217, 255, 0.3);
    --glow-green: 0 0 10px rgba(0, 255, 136, 0.5), 0 0 20px rgba(0, 255, 136, 0.3);
    --glow-purple: 0 0 10px rgba(183, 68, 255, 0.5), 0 0 20px rgba(183, 68, 255, 0.3);
}

/* Tipografia */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

/* Header */
header {
    background: var(--header-bg);
    color: white;
    padding: 3rem 0;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.2), 0 0 40px rgba(0, 217, 255, 0.1);
    border-bottom: 2px solid var(--border-glow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 217, 255, 0.1), transparent);
    animation: slide 3s infinite;
}

@keyframes slide {
    0%, 100% { left: -100%; }
    50% { left: 100%; }
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.6), 0 0 40px rgba(0, 217, 255, 0.3);
    letter-spacing: 2px;
}

header .subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    color: var(--accent-color);
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.4);
}

/* Navegação */
nav {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.2);
    border-bottom: 1px solid var(--border-glow);
}

.nav-menu {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0;
}

.nav-menu li {
    margin: 0;
    position: relative;
}

.nav-menu a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    padding: 1rem 1.5rem;
    transition: all 0.3s ease;
    font-weight: 500;
    position: relative;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    width: 80%;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--secondary-color);
    text-shadow: var(--glow-cyan);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Main Content */
main {
    padding: 2rem 1.5rem;
}

/* Módulos */
.module {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
    transition: all 0.4s ease;
}

.module::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color), var(--accent-purple));
    background-size: 200% 100%;
    animation: gradient-shift 3s ease infinite;
}

@keyframes gradient-shift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.module:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 217, 255, 0.2), 0 0 40px rgba(0, 217, 255, 0.1);
    border-color: var(--border-glow);
}

.module h2 {
    color: var(--secondary-color);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: var(--glow-cyan);
}

.module h3 {
    color: var(--accent-color);
    font-size: 1.5rem;
    margin-top: 1.5rem;
    margin-bottom: 1rem;
    text-shadow: var(--glow-green);
}

.module h4 {
    color: var(--text-color);
    font-size: 1.2rem;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

/* Content Blocks */
.content-block {
    margin-bottom: 2rem;
}

.content-block:last-child {
    margin-bottom: 0;
}

.content-block ul,
.content-block ol {
    margin-left: 2rem;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
}

.content-block li {
    margin-bottom: 0.5rem;
}

/* Code Blocks */
code {
    background-color: var(--code-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
    color: var(--accent-purple);
    border: 1px solid rgba(183, 68, 255, 0.3);
    box-shadow: 0 0 10px rgba(183, 68, 255, 0.1);
}

pre {
    background-color: var(--code-bg);
    border: 1px solid var(--border-glow);
    border-radius: 8px;
    padding: 1.25rem;
    overflow-x: auto;
    margin: 1rem 0;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4), inset 0 0 20px rgba(0, 217, 255, 0.05);
}

pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--secondary-color), transparent);
}

pre code {
    background: none;
    padding: 0;
    color: var(--accent-color);
    font-size: 0.9rem;
    line-height: 1.5;
    border: none;
    box-shadow: none;
}

/* Links */
a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

a:hover {
    color: var(--accent-color);
    text-shadow: var(--glow-cyan);
}

/* Good/Bad Examples */
.good-bad-examples {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1rem;
}

.good, .bad {
    padding: 1.25rem;
    border-radius: 8px;
    position: relative;
    backdrop-filter: blur(5px);
}

.good {
    background-color: rgba(0, 255, 136, 0.05);
    border: 1px solid var(--accent-color);
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.1);
}

.bad {
    background-color: rgba(255, 68, 68, 0.05);
    border: 1px solid #ff4444;
    box-shadow: 0 0 15px rgba(255, 68, 68, 0.1);
}

.good h4 {
    color: var(--accent-color);
    text-shadow: var(--glow-green);
}

.bad h4 {
    color: #ff6b6b;
    text-shadow: 0 0 10px rgba(255, 68, 68, 0.4);
}

/* Exercise */
.exercise {
    background: linear-gradient(135deg, rgba(183, 68, 255, 0.1), rgba(0, 217, 255, 0.1));
    border: 2px solid var(--accent-purple);
    border-radius: 12px;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(183, 68, 255, 0.2);
}

.exercise::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(183, 68, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* Cheat Sheet */
.cheatsheet {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.05) 0%, rgba(183, 68, 255, 0.05) 100%);
}

.cheat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.cheat-category {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.cheat-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
}

.cheat-category:hover {
    transform: translateX(5px);
    border-color: var(--secondary-color);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.2);
}

.cheat-category h3 {
    color: var(--secondary-color);
    font-size: 1.2rem;
    margin-top: 0;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    text-shadow: var(--glow-cyan);
}

/* Congratulations Section */
.congratulations {
    background: linear-gradient(135deg, var(--primary-color) 0%, rgba(183, 68, 255, 0.3) 50%, var(--primary-color) 100%);
    color: white;
    text-align: center;
    padding: 3rem 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border: 2px solid var(--accent-purple);
    box-shadow: 0 0 40px rgba(183, 68, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.congratulations::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
    animation: rotate 10s linear infinite;
}

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

.congratulations h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    border: none;
    color: white;
    position: relative;
    z-index: 1;
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.6), 0 0 40px rgba(183, 68, 255, 0.4);
}

.congratulations p {
    font-size: 1.2rem;
    position: relative;
    z-index: 1;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    border-top: 2px solid var(--border-glow);
    box-shadow: 0 -4px 20px rgba(0, 217, 255, 0.1);
}

footer a {
    color: var(--secondary-color);
    transition: all 0.3s ease;
}

footer a:hover {
    color: var(--accent-color);
    text-shadow: var(--glow-cyan);
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    header .subtitle {
        font-size: 1rem;
    }

    .nav-menu {
        flex-direction: column;
    }

    .nav-menu a {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .module {
        padding: 1.5rem;
    }

    .module h2 {
        font-size: 1.5rem;
    }

    .module h3 {
        font-size: 1.2rem;
    }

    .good-bad-examples {
        grid-template-columns: 1fr;
    }

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

    .congratulations h2 {
        font-size: 2rem;
    }

    .congratulations p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .module {
        padding: 1rem;
    }

    pre {
        padding: 0.75rem;
        font-size: 0.85rem;
    }
}

/* Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background-color: var(--secondary-color);
    color: white;
}

/* Scrollbar (Webkit) */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--primary-color);
    border-left: 1px solid var(--border-color);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--secondary-color), var(--accent-color));
    border-radius: 10px;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.5);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--accent-color), var(--accent-purple));
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.6);
}

/* Futuristic Grid Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: -1;
}

/* Scan Line Effect */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--secondary-color), transparent);
    box-shadow: 0 0 20px var(--secondary-color);
    animation: scan 4s linear infinite;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.3;
}

@keyframes scan {
    0% { top: 0; }
    100% { top: 100%; }
}

/* Glow Effects for Headings */
h1, h2 {
    position: relative;
}

/* Button Styles (if any) */
button, .btn {
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border: none;
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0, 217, 255, 0.3);
    position: relative;
    overflow: hidden;
}

button::before, .btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:hover::before, .btn:hover::before {
    width: 300px;
    height: 300px;
}

button:hover, .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 217, 255, 0.5);
}

/* Floating Animation for Important Elements */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Selection Style */
::selection {
    background: var(--secondary-color);
    color: var(--primary-color);
    text-shadow: none;
}

::-moz-selection {
    background: var(--secondary-color);
    color: var(--primary-color);
    text-shadow: none;
}

/* Enhanced Focus States */
*:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Neon Border Animation */
@keyframes neon-border {
    0%, 100% {
        box-shadow:
            0 0 5px var(--secondary-color),
            0 0 10px var(--secondary-color),
            0 0 20px var(--secondary-color);
    }
    50% {
        box-shadow:
            0 0 10px var(--accent-color),
            0 0 20px var(--accent-color),
            0 0 40px var(--accent-color);
    }
}