/**
 * 3wi.com.br - Styles
 * Design System Minimalista
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #8b5cf6;

    --color-bg: #fafafa;
    --color-bg-alt: #ffffff;
    --color-bg-dark: #0f0f23;

    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Plus Jakarta Sans', sans-serif;

    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;

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

    /* Shadows */
    --shadow-sm: 0 1px 2px 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);

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

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Container
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ============================================
   Language Selector
   ============================================ */
.lang-selector {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    display: flex;
    gap: var(--space-xs);
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: var(--space-xs);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

.lang-btn {
    background: transparent;
    border: none;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.lang-btn:hover {
    color: var(--color-primary);
}

.lang-btn.active {
    background: var(--color-primary);
    color: white;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, #1a1a3e 50%, #2d1b4e 100%);
    color: white;
    position: relative;
    overflow: hidden;
    padding: var(--space-3xl) var(--space-lg);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.logo {
    display: inline-flex;
    align-items: baseline;
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.8s ease;
}

.logo-icon {
    font-family: var(--font-heading);
    font-size: 5rem;
    font-weight: 800;
    color: var(--color-primary-light);
    line-height: 1;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    color: white;
    margin-left: -0.1em;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: 700;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 0.8s ease 0.1s both;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto var(--space-xl);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-wave {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    color: var(--color-bg);
    line-height: 0;
}

.hero-wave svg {
    width: 100%;
    height: 80px;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

/* ============================================
   Projects Section
   ============================================ */
.projects {
    padding: var(--space-3xl) 0;
    background: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.project-card {
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
}

.project-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.project-description {
    color: var(--color-text-muted);
    line-height: 1.7;
    flex-grow: 1;
    margin-bottom: var(--space-lg);
}

.project-tags {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 600;
}

.project-link {
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.project-link::after {
    content: '→';
    transition: var(--transition-fast);
}

.project-card:hover .project-link::after {
    transform: translateX(4px);
}

/* ============================================
   Philosophy Section
   ============================================ */
.philosophy {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-alt);
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.philosophy-item {
    text-align: center;
    padding: var(--space-xl);
}

.philosophy-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
}

.philosophy-item h3 {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text);
}

.philosophy-item p {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg-dark);
    color: white;
    padding: var(--space-3xl) 0 var(--space-xl);
    text-align: center;
}

.footer-brand {
    display: inline-flex;
    align-items: baseline;
    margin-bottom: var(--space-md);
}

.logo-icon-small {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary-light);
}

.logo-text-small {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-left: -0.05em;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-xl);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary-light);
}

.footer-divider {
    color: rgba(255, 255, 255, 0.3);
}

.footer-copyright {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll animations */
.philosophy-item,
.project-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.philosophy-item.visible,
.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    .logo-icon {
        font-size: 3.5rem;
    }

    .logo-text {
        font-size: 2.8rem;
    }

    .section-title {
        font-size: var(--text-2xl);
    }

    .lang-selector {
        top: var(--space-md);
        right: var(--space-md);
    }

    .projects-grid,
    .philosophy-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .container {
        padding: 0 var(--space-md);
    }

    .btn {
        width: 100%;
    }
}