:root {
    /* Geometric Silence Variables */
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;
    
    /* Fonts */
    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;
}

/* Dark Mode - Midnight Luxury (Padrão) */
body.dark-mode {
    --bg-main: #0A0A0A;
    --bg-surface: #1C1C1C;
    --text-primary: #F5F5F0;
    --text-secondary: #A0A0A0;
    --accent: #B59A5F;
    --border-color: #2A2A2A;
}

/* Light Mode - Minimalist Slate */
body.light-mode {
    --bg-main: #F4F4F9;
    --bg-surface: #FFFFFF;
    --text-primary: #2B303A;
    --text-secondary: #5C6B73;
    --accent: #5C6B73;
    --border-color: #D0D5D1;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 400;
    line-height: 1.2;
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--bg-main);
    z-index: 100;
    transition: background-color 0.4s ease, border-color 0.4s ease;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    position: relative;
    padding-bottom: 4px;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.main-nav a:hover {
    opacity: 1;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 1px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

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

#theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease;
}

#theme-toggle:hover {
    color: var(--accent);
}

/* Layout Utilities */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-sm);
}

.section-header h2 {
    font-size: 2.5rem;
    letter-spacing: -0.02em;
}

.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.grid-3-col {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.grid-4-col {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

@media (max-width: 1024px) {
    .grid-4-col { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .grid-2-col, .grid-3-col, .grid-4-col { grid-template-columns: 1fr; }
    .main-nav { display: none; }
    :root {
        --spacing-xl: 4rem;
        --spacing-lg: 2rem;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-main);
}

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

.btn-secondary {
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Hero Section */
.hero-section {
    min-height: 80vh;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.badge {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.3rem 0.8rem;
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.hero-title {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
}

/* Sobre Section */
.sobre-visual {
    height: 400px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.abstract-shape {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60%;
    height: 60%;
    border: 1px solid var(--border-color);
    border-radius: 50%;
}

.sobre-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

/* Cards (Atuação & Projetos) */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.card-icon {
    margin-bottom: var(--spacing-sm);
    color: var(--accent);
}

.card h3 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-body);
    font-weight: 500;
}

.card p {
    font-size: 0.95rem;
    margin-bottom: 0;
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--accent);
    border-radius: 50%;
    margin-bottom: var(--spacing-sm);
}

/* Princípios */
.principles-list {
    border-top: 1px solid var(--border-color);
}

.principle-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.principle-item .num {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--accent);
    line-height: 1;
}

.principle-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.principle-content p {
    margin-bottom: 0;
    max-width: 600px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    background-color: var(--bg-surface);
}

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

.footer-content h2 {
    font-size: 3rem;
    line-height: 1.1;
}

.footer-cta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
}

.social-links a {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .footer-content { grid-template-columns: 1fr; }
    .hero-title { font-size: 3rem; }
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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