/**
 * Universo Python - Design System
 * Tema: Exploração Espacial
 */

/* ==================== RESET E BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    overflow-x: hidden;
}

:root {
    /* Paleta de Cores Espacial */
    --color-deep-space: #0a0e27;
    --color-dark-matter: #151935;
    --color-nebula: #1e2749;
    --color-cosmic-blue: #2d3561;
    --color-star-white: #f8f9fc;
    --color-moon-gray: #a0a8c7;
    --color-galaxy-purple: #6366f1;
    --color-supernova: #8b5cf6;
    --color-solar-orange: #f59e0b;
    --color-comet-cyan: #06b6d4;
    --color-alien-green: #10b981;
    --color-mars-red: #ef4444;

    /* Gradientes */
    --gradient-cosmic: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-nebula: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-aurora: linear-gradient(90deg, #06b6d4 0%, #6366f1 50%, #8b5cf6 100%);
    --gradient-sunset: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);

    /* Tipografia */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', 'Inter', sans-serif;
    --font-code: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

    /* Espaçamentos */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* Bordas */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);
    --shadow-glow-strong: 0 0 40px rgba(99, 102, 241, 0.5);

    /* Transições */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ==================== FONTES ==================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Poppins:wght@600;700;800;900&display=swap');

/* ==================== BODY E ELEMENTOS BASE ==================== */
body {
    font-family: var(--font-primary);
    background: var(--color-deep-space);
    color: var(--color-star-white);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}


/* ==================== TIPOGRAFIA ==================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
    color: var(--color-star-white);
}

h1 { font-size: 3rem; font-weight: 900; }
h2 { font-size: 2.25rem; font-weight: 800; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--color-moon-gray);
}

a {
    color: var(--color-galaxy-purple);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-supernova);
}

strong {
    font-weight: 600;
    color: var(--color-star-white);
}

code {
    font-family: var(--font-code);
    background: var(--color-dark-matter);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    color: var(--color-comet-cyan);
}

pre {
    background: var(--color-dark-matter);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin-bottom: var(--space-md);
    border: 1px solid var(--color-nebula);
}

pre code {
    background: none;
    padding: 0;
    color: var(--color-star-white);
}

/* ==================== CONTAINER E LAYOUT ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
    position: relative;
    z-index: 1;
}

.container-wide {
    max-width: 1400px;
}

.container-narrow {
    max-width: 800px;
}

/* ==================== HEADER E NAVEGAÇÃO ==================== */
header {
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(99, 102, 241, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--gradient-nebula);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo:hover {
    opacity: 0.9;
}

.nav-menu {
    display: flex;
    gap: var(--space-lg);
    list-style: none;
    align-items: center;
}

.nav-menu a {
    color: var(--color-moon-gray);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-nebula);
    transition: width var(--transition-base);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-star-white);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

/* Menu hamburguer (mobile) */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-star-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-toggle:hover {
    color: var(--color-galaxy-purple);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    font-family: var(--font-primary);
    font-size: 1rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-nebula);
    color: white;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--color-galaxy-purple);
    border: 2px solid var(--color-galaxy-purple);
}

.btn-secondary:hover {
    background: var(--color-galaxy-purple);
    color: white;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ==================== CARDS ==================== */
.card {
    background: var(--color-dark-matter);
    border: 1px solid var(--color-nebula);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-nebula);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-galaxy-purple);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-sm);
}

.card-text {
    color: var(--color-moon-gray);
}

/* ==================== BADGES E TAGS ==================== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    background: var(--color-nebula);
    color: var(--color-star-white);
}

.badge-primary {
    background: var(--gradient-nebula);
}

.badge-success {
    background: var(--color-alien-green);
}

.badge-warning {
    background: var(--color-solar-orange);
}

/* ==================== GRID SYSTEM ==================== */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ==================== UTILITÁRIOS ==================== */
.text-center { text-align: center; }
.text-gradient {
    background: var(--gradient-nebula);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }

.py-1 { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-2 { padding-top: var(--space-md); padding-bottom: var(--space-md); }
.py-3 { padding-top: var(--space-lg); padding-bottom: var(--space-lg); }
.py-4 { padding-top: var(--space-xl); padding-bottom: var(--space-xl); }
.py-5 { padding-top: var(--space-2xl); padding-bottom: var(--space-2xl); }
.py-6 { padding-top: var(--space-3xl); padding-bottom: var(--space-3xl); }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    :root {
        font-size: 14px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    /* Header responsivo */
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        gap: 0;
    }

    .logo img {
        height: 32px !important;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        max-width: 85vw;
        height: 100vh;
        background: var(--color-dark-matter);
        flex-direction: column;
        gap: 0;
        padding: 5rem 2rem 2rem;
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.5);
        transition: right 0.3s ease;
        z-index: 1000;
        overflow-y: auto;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu li {
        width: 100%;
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--color-nebula);
    }

    .nav-menu li:last-child {
        border-bottom: none;
        margin-top: var(--space-md);
    }

    .nav-menu a {
        display: block;
        padding: 0.5rem 0;
        font-size: 1.1rem;
    }

    .nav-menu a::after {
        display: none;
    }

    .nav-menu .btn {
        width: 100%;
        text-align: center;
    }

    /* Overlay para fechar menu */
    .menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.7);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }
}

/* ==================== FOOTER ==================== */
footer {
    background: var(--color-dark-matter);
    border-top: 1px solid var(--color-nebula);
    margin-top: var(--space-3xl);
    padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-nebula);
    color: var(--color-moon-gray);
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-nebula);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.social-links a:hover {
    background: var(--gradient-nebula);
    transform: translateY(-3px);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}