:root {
    --bg: #fbfbfd;
    --bg-elevated: #ffffff;
    --bg-muted: #f5f5f7;
    --bg-dark: #0b0b0d;
    --text: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-on-dark: #f5f5f7;
    --text-secondary-on-dark: #a1a1a6;
    --accent: #0071e3;
    --accent-hover: #0059b3;
    --border: rgba(0, 0, 0, 0.08);
    --border-strong: rgba(0, 0, 0, 0.14);
    --border-on-dark: rgba(255, 255, 255, 0.14);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 24px 48px rgba(0, 0, 0, 0.12);

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    --spacing-xxxl: 6rem;

    --border-radius-sm: 6px;
    --border-radius-md: 10px;
    --border-radius-lg: 18px;
    --border-radius-xl: 24px;
    --border-radius-circle: 50%;

    --font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.375rem;
    --font-size-xxl: clamp(1.75rem, 1.4rem + 1.5vw, 2.25rem);
    --font-size-xxxl: clamp(2.25rem, 1.6rem + 3vw, 3.5rem);
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    --transition-slow: 0.6s cubic-bezier(0.22, 1, 0.36, 1);

    --container-max-width: 1120px;
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    padding-top: var(--nav-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Navegação fixa */
#nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    display: flex;
    align-items: center;
    background: rgba(251, 251, 253, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    width: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text);
    flex-shrink: 0;
}

.nav-brand:hover {
    color: var(--text);
}

.nav-brand-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: var(--border-radius-sm);
    background: var(--text);
    color: var(--bg);
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.nav-brand-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    letter-spacing: -0.01em;
    white-space: nowrap;
}

#nav-menu ul {
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
}

#nav-menu li a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

#nav-menu li a i {
    font-size: 0.85em;
}

#nav-menu li a::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -10px;
    height: 2px;
    background: var(--text);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

#nav-menu li a:hover,
#nav-menu li a.active {
    color: var(--text);
}

#nav-menu li a.active::after {
    transform: scaleX(1);
}

.lang-switch {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.lang-btn {
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-family);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.lang-btn.active {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
}

/* Hero (seção escura) */
.hero-section {
    position: relative;
    background: var(--bg-dark);
    color: var(--text-on-dark);
    padding: var(--spacing-xxxl) 0 calc(var(--spacing-xxxl) * 0.75);
    overflow: hidden;
}

.profile-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xxl);
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    flex-direction: row;
}

.profile-picture {
    position: relative;
    width: 176px;
    height: 176px;
    border-radius: var(--border-radius-circle);
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: 0 0 0 1px var(--border-on-dark), var(--shadow-lg);
}

.profile-picture img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.profile-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-info h1 {
    font-size: var(--font-size-xxxl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
    color: var(--text-on-dark);
}

.profile-info h2 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-regular);
    color: var(--text-secondary-on-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
    max-width: 640px;
}

.hero-tagline {
    font-size: var(--font-size-base);
    color: var(--text-secondary-on-dark);
    max-width: 480px;
    margin: 0 auto var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-circle);
    border: 1px solid var(--border-on-dark);
    color: var(--text-on-dark);
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--text-on-dark);
    color: var(--bg-dark);
    border-color: var(--text-on-dark);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: var(--spacing-xxl);
    justify-content: center;
}

.hero-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-stat-value {
    font-size: var(--font-size-xxl);
    font-weight: var(--font-weight-bold);
    color: var(--text-on-dark);
    letter-spacing: -0.01em;
}

.hero-stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary-on-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Seções */
.section {
    padding: var(--spacing-xxxl) 0;
}

.section-eyebrow {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: var(--font-size-xxxl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
    color: var(--text);
    margin-bottom: var(--spacing-xl);
}

.presentation-text {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 760px;
}

.skills-section {
    margin-top: var(--spacing-xxl);
}

.skills-section h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-lg);
    color: var(--text);
}

.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.skill-item {
    position: relative;
    z-index: 1;
    width: 64px;
    height: 64px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.skill-item:hover {
    z-index: 2;
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

.skill-item img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.skill-item::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -34px;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background: var(--text);
    color: var(--bg);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
    z-index: 10;
}

.skill-item:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Projetos */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.project-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

.project-image {
    width: 100%;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-muted);
}

.project-image img {
    width: auto;
    height: 62%;
    aspect-ratio: 1 / 1;
    object-fit: contain;
    border-radius: 22%;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.03);
}

.project-info {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-badge {
    display: inline-block;
    align-self: flex-start;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.3px;
    color: var(--text-secondary);
    background: var(--bg-muted);
    padding: 3px var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-sm);
}

.project-info h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--text);
    letter-spacing: -0.01em;
}

.project-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    flex: 1;
}

.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--border-radius-md);
    color: var(--text);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
}

.project-link:hover {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
}

/* Seções escuras (hero e contato) */
.section--dark {
    background: var(--bg-dark);
    color: var(--text-on-dark);
}

.section--dark .section-title {
    color: var(--text-on-dark);
}

.contact-section {
    margin-bottom: var(--spacing-xl);
}

.contact-subtitle {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: var(--text-on-dark);
}

.social-buttons-row {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-contact-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-on-dark);
    color: var(--text-on-dark);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    width: 100%;
    max-width: 220px;
    transition: all var(--transition-fast);
}

.social-contact-button:hover {
    background: var(--text-on-dark);
    color: var(--bg-dark);
    border-color: var(--text-on-dark);
}

.social-contact-button i {
    font-size: 1.15rem;
}

.email-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 520px;
}

.email-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-on-dark);
    transition: all var(--transition-fast);
}

.email-box:hover {
    border-color: var(--text-on-dark);
}

.email-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-on-dark);
    flex: 1;
}

.email-link:hover {
    color: var(--text-on-dark);
}

.email-text {
    font-size: var(--font-size-sm);
    word-break: break-all;
}

.copy-email-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: var(--border-radius-sm);
    background: transparent;
    border: 1px solid var(--border-on-dark);
    color: var(--text-on-dark);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-email-btn:hover {
    background: rgba(255, 255, 255, 0.08);
}

.copy-email-btn.copied {
    background: #1d8a4f;
    border-color: #1d8a4f;
}

.copy-email-btn.copied i {
    color: #fff;
}

/* Rodapé */
footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: var(--spacing-xxl) 0;
}

.back-to-top {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

#back-to-top-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-circle);
    background: var(--bg-elevated);
    color: var(--text);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    cursor: pointer;
    transition: all var(--transition-fast);
}

#back-to-top-btn:hover {
    background: var(--text);
    color: var(--bg);
    border-color: var(--text);
    transform: translateY(-2px);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-brand-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--border-radius-sm);
    background: var(--text);
    color: var(--bg);
    font-size: var(--font-size-base);
    flex-shrink: 0;
}

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

.footer-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-circle);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--bg);
    background: var(--text);
    border-color: var(--text);
    transform: translateY(-2px);
}

.copyright {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: left;
}

/* Scroll personalizado */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: #d2d2d7;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #b8b8bd;
}

/* Seleção de texto personalizada */
::selection {
    background: var(--accent);
    color: white;
}

::-moz-selection {
    background: var(--accent);
    color: white;
}