/* ==========================================================================
   Felipe Barbosa Souza - Personal Site Styles
   Theme: Apple Minimalist / Premium High-Contrast
   Vanilla CSS - Modern, Responsive, and Clean
   ========================================================================== */

/* --- 1. Variables & Design Tokens --- */
:root {
    /* Fonts */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;

    /* Transition Speeds (ease-in-out) */
    --transition-fast: 0.2s ease-in-out;
    --transition-normal: 0.35s ease-in-out;
    --transition-slow: 0.5s ease-in-out;

    /* Border Radius (Specified 16px for cards) */
    --radius-sm: 8px;
    --radius-md: 16px; /* Cards specification */
    --radius-lg: 20px;
    --radius-full: 9999px;
}

/* --- Dark Theme (Default) --- */
[data-theme="dark"] {
    --bg-primary: #000000;      /* Preto Puro */
    --bg-secondary: #0d0d0d;    /* Componentes/Fundo alternativo */
    --bg-tertiary: #1a1a1a;     /* Tons de cinza escuro para profundidade */
    
    --text-primary: #ffffff;    /* Alto contraste */
    --text-secondary: #a3a3a3;  /* Cinza claro para leitura */
    --text-muted: #6b7280;      /* Cinza médio */
    
    --accent: #2563eb;          /* Azul Apple */
    --accent-hover: #3b82f6;
    --accent-light: rgba(37, 99, 235, 0.15);
    
    --card-bg: #0d0d0d;         /* Cards em cinza muito escuro */
    --card-hover-bg: #141414;
    --border-color: #262626;    /* Linhas finas */
    --card-hover-border: #404040;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.8);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.9);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.95);

    --navbar-bg: rgba(0, 0, 0, 0.7);
    --modal-overlay-bg: rgba(0, 0, 0, 0.85);
}

/* --- Light Theme --- */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f7;    /* Cinza claro Apple */
    --bg-tertiary: #e8e8ed;
    
    --text-primary: #1d1d1f;    /* Preto Apple */
    --text-secondary: #515154;  /* Cinza escuro */
    --text-muted: #86868b;
    
    --accent: #0071e3;          /* Azul link Apple */
    --accent-hover: #0077ed;
    --accent-light: rgba(0, 113, 227, 0.08);
    
    --card-bg: #f5f5f7;         /* Cards claros */
    --card-hover-bg: #e8e8ed;
    --border-color: #d2d2d7;
    --card-hover-border: #86868b;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.08);

    --navbar-bg: rgba(255, 255, 255, 0.7);
    --modal-overlay-bg: rgba(29, 29, 31, 0.4);
}

/* --- 2. Base Resets --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
    outline: none;
}

ul {
    list-style: none;
}

/* --- 3. Layout Utilities --- */
.container {
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
    position: relative;
}

/* --- 4. Shared Components --- */

/* Buttons (Apple style rounded/capsule buttons) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-full); /* Capsule shape */
    transition: all var(--transition-fast);
    gap: 8px;
}

.btn-primary {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border: 1px solid var(--text-primary);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.btn-outline {
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--text-primary);
    transform: scale(1.02);
}

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.05rem;
}

/* Section Title (High Contrast) */
.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800; /* Extra bold */
    text-align: center;
    margin-bottom: 60px;
    color: var(--text-primary);
    letter-spacing: -0.8px;
}

/* Icons styling */
.icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    display: block;
}

.theme-icon {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    display: block;
}

/* Toggle Sun/Moon icons depending on active theme */
[data-theme="dark"] .icon-sun {
    display: block;
}
[data-theme="dark"] .icon-moon {
    display: none;
}
[data-theme="light"] .icon-sun {
    display: none;
}
[data-theme="light"] .icon-moon {
    display: block;
}

/* --- 5. Navigation Bar (Glassmorphism Blur) --- */
.menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background-color: var(--navbar-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.menu-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800; /* Extra Bold */
    color: var(--text-primary);
    letter-spacing: -0.8px;
}

.logo span {
    font-weight: 300; /* Light weight contrast */
    color: var(--text-secondary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.theme-switch-container {
    display: flex;
    align-items: center;
}

.theme-toggle-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background-color: transparent;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.theme-toggle-btn:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* --- 6. Hero / Header Section --- */
.hero {
    min-height: 80vh;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 120px;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.perfil {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.img-wrapper {
    position: relative;
    margin-bottom: 28px;
}

.img-perfil {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.status-badge {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 5px 12px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 500;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
    position: relative;
}

.pulse-dot::after {
    content: '';
    width: 100%;
    height: 100%;
    position: absolute;
    left: 0;
    top: 0;
    background-color: #10b981;
    border-radius: 50%;
    animation: pulse 2.5s infinite;
}

.site-title {
    font-family: var(--font-heading);
    font-size: 3.5rem; /* Large size */
    font-weight: 800; /* Extra bold */
    letter-spacing: -1.5px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.site-subtitle {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 300; /* Light weight for contrast */
    color: var(--text-secondary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.hero-tech-stack {
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-bottom: 32px;
    letter-spacing: 0.8px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* --- 7. Sobre Mim Section --- */
.sobre {
    background-color: var(--bg-primary);
}

.sobre-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 64px;
    align-items: start;
}

.sobre-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-align: justify;
}

.sobre-text p strong {
    font-weight: 600;
    color: var(--text-primary);
}

.sobre-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.stat-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--radius-md); /* 16px border radius */
    text-align: center;
    transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--card-hover-border);
    background-color: var(--card-hover-bg);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 800; /* Extra Bold */
    display: block;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

/* --- 8. Experiência Section --- */
.experiencia {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 1px;
    background-color: var(--border-color);
    top: 6px;
    bottom: 6px;
    left: 20px;
}

.timeline-item {
    position: relative;
    margin-bottom: 48px;
    padding-left: 52px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--text-primary);
    left: 15px;
    top: 6px;
    z-index: 2;
}

.timeline-date {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.timeline-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md); /* 16px border-radius */
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.timeline-content:hover {
    transform: translateY(-2px);
    border-color: var(--card-hover-border);
    background-color: var(--card-hover-bg);
    box-shadow: var(--shadow-md);
}

.timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.company-name {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 16px;
    display: inline-block;
}

.timeline-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.timeline-bullets {
    padding-left: 20px;
    margin-bottom: 24px;
}

.timeline-bullets li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    list-style-type: square;
}

.timeline-bullets li strong {
    color: var(--text-primary);
    font-weight: 600;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.timeline-tags span {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

/* --- 9. Skills Section --- */
.skills {
    background-color: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.skill-category {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: var(--radius-md); /* 16px border-radius */
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.skill-category:hover {
    transform: translateY(-2px);
    border-color: var(--card-hover-border);
    background-color: var(--card-hover-bg);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.skill-icon {
    width: 22px;
    height: 22px;
    stroke: var(--text-primary);
    display: block;
}

.skill-header h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
}

.skill-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.skill-list li {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.skill-list li::before {
    content: '';
    width: 5px;
    height: 5px;
    background-color: var(--text-muted);
    border-radius: 50%;
    display: inline-block;
}

/* Language category specific styles */
.skill-languages {
    grid-column: span 2;
}

.languages-wrapper {
    display: flex;
    gap: 32px;
}

.lang-item {
    flex: 1;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 16px 24px;
    border-radius: var(--radius-md); /* 16px border-radius */
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lang-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.lang-level {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 2px 10px;
    border-radius: var(--radius-sm);
}

/* --- 10. Contato Section --- */
.contato {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.contato-intro {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 50px;
}

.social-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto 60px;
}

.social-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 32px;
    border-radius: var(--radius-md); /* 16px border-radius */
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.social-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.social-svg {
    width: 22px;
    height: 22px;
    display: block;
}

.social-card:hover .social-icon {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.social-card h3 {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.social-card p {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.contato-cta p {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: 20px;
}

/* --- 11. Footer --- */
.site-footer {
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    text-align: center;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* --- 12. Modal Styles (High Contrast & Apple-Like) --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    background-color: var(--modal-overlay-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-normal);
    padding: 24px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 500px;
    border-radius: var(--radius-md); /* 16px border-radius */
    padding: 40px;
    box-shadow: var(--shadow-lg);
    position: relative;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal-card {
    transform: translateY(0);
}

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    color: var(--text-muted);
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close-btn:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.close-icon {
    width: 22px;
    height: 22px;
    stroke: currentColor;
    display: block;
}

.modal-header {
    margin-bottom: 24px;
    padding-right: 28px;
}

.modal-header h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800; /* Extra bold */
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.modal-header p {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 0.92rem;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--text-primary);
}

.form-group textarea {
    resize: none;
}

/* --- 13. Scroll Reveal Animations (Smooth ease-in-out) --- */
.reveal-element {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Sequence delays for grid components */
.skill-category:nth-child(1).reveal-element { transition-delay: 0.05s; }
.skill-category:nth-child(2).reveal-element { transition-delay: 0.1s; }
.skill-category:nth-child(3).reveal-element { transition-delay: 0.15s; }
.skill-category:nth-child(4).reveal-element { transition-delay: 0.2s; }
.skill-category:nth-child(5).reveal-element { transition-delay: 0.25s; }

/* --- 14. Responsive Layouts --- */

@media (max-width: 900px) {
    .sobre-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .sobre-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
    
    .skill-languages {
        grid-column: span 1;
    }
    
    .social-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        max-width: 340px;
        margin: 0 auto 40px;
    }
}

@media (max-width: 640px) {
    section {
        padding: 60px 0;
    }

    .site-title {
        font-size: 2.25rem;
        letter-spacing: -1px;
    }
    
    .site-subtitle {
        font-size: 1.15rem;
    }
    
    .sobre-stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .languages-wrapper {
        flex-direction: column;
        gap: 10px;
    }

    .timeline::before {
        left: 10px;
    }
    
    .timeline-dot {
        left: 10px;
        transform: translateX(-50%);
    }
    
    .timeline-item {
        padding-left: 32px;
    }

    .timeline-content {
        padding: 20px;
    }

    .menu-container {
        height: 56px;
    }
    
    .nav-links {
        display: none; /* Collapsed nav on tiny devices */
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 250px;
        margin: 0 auto;
    }
    
    .btn {
        width: 100%;
    }
}

@media (min-width: 641px) {
    .nav-links {
        display: flex;
    }
}