/* ============================================
   Patrick Passos Personal Website - Styles
   Modern, accessible, responsive design
   ============================================ */

/* ============================================
   CSS Variables - Theme System
   ============================================ */
:root {
    /* Colors - Light Theme */
    --color-primary: #0EA5E9;
    --color-primary-dark: #0284C7;
    --color-primary-light: #38BDF8;
    --color-accent: #22C55E;
    
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F8FAFC;
    --color-bg-tertiary: #F1F5F9;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748B;
    --color-border: #E2E8F0;
    --color-card-bg: #FFFFFF;
    --color-shadow: rgba(15, 23, 42, 0.1);
    --color-shadow-hover: rgba(15, 23, 42, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Effects */
    --transition-speed: 0.2s;
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --border-radius-full: 9999px;
    
    /* Layout */
    --container-width: 1200px;
    --header-height: 72px;
}

/* Dark Theme */
[data-theme="dark"] {
    --color-bg: #0F172A;
    --color-bg-secondary: #1E293B;
    --color-bg-tertiary: #334155;
    --color-text: #F8FAFC;
    --color-text-secondary: #CBD5E1;
    --color-text-tertiary: #94A3B8;
    --color-border: #334155;
    --color-card-bg: #1E293B;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-hover: rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: background-color var(--transition-speed) var(--transition-smooth),
                color var(--transition-speed) var(--transition-smooth);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

h1 {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

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

.lead {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-smooth);
}

a:hover,
a:focus {
    color: var(--color-primary-dark);
}

/* ============================================
   Utility Classes
   ============================================ */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-md);
}

.section-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    margin: 0 auto var(--spacing-md);
    border-radius: var(--border-radius-full);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 100;
}

.skip-link:focus {
    top: 0;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-decoration: none;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-smooth);
    white-space: nowrap;
}

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

.btn-primary:hover,
.btn-primary:focus {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--color-shadow);
}

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

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--color-bg-secondary);
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.header.scrolled {
    box-shadow: 0 2px 8px var(--color-shadow);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-brand {
    display: flex;
    align-items: center;
}

.logo {
    color: var(--color-primary);
    transition: transform var(--transition-speed) var(--transition-smooth);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) var(--transition-smooth);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.theme-toggle:hover,
.theme-toggle:focus {
    background: var(--color-primary);
    color: white;
    transform: rotate(15deg);
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: opacity var(--transition-speed) var(--transition-smooth),
                transform var(--transition-speed) var(--transition-smooth);
}

[data-theme="light"] .moon-icon,
[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: scale(0.5);
}

[data-theme="light"] .sun-icon,
[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: scale(1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
}

.hamburger {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    margin: 3px 0;
    transition: all var(--transition-speed) var(--transition-smooth);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-2xl);
}

/* Social Links */
.social-links {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.social-links a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-full);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.social-links a:hover,
.social-links a:focus {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.social-links svg {
    width: 18px;
    height: 18px;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--color-bg);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    text-align: center;
}

.interests {
    margin-top: var(--spacing-xl);
}

.interests h3 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.interests-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    list-style: none;
}

.interests-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-weight: 500;
    color: var(--color-text);
    transition: all var(--transition-speed) var(--transition-smooth);
}

.interests-list li:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--color-shadow);
}

.interests-list svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ============================================
   Journey Section
   ============================================ */
.journey {
    background: var(--color-bg-secondary);
}

.journey-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.journey-card {
    padding: var(--spacing-xl);
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.journey-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--color-shadow);
    border-color: var(--color-primary);
}

.journey-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--border-radius);
    color: white;
}

.journey-card h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.journey-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ============================================
   Projects Section
   ============================================ */
.projects {
    background: var(--color-bg);
}

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

.project-card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px var(--color-shadow);
    border-color: var(--color-primary);
}

.project-image {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s var(--transition-smooth);
}

/* Special styling for logo images that need contain instead of cover */
.project-image img[src*="solia-logo"] {
    object-fit: contain;
    padding: var(--spacing-xl);
    background: white;
}

.project-image img[src*="earth"] {
    object-fit: cover;
    padding: 0;
}

.project-card:hover .project-image img[src*="solia-logo"] {
    transform: scale(1.02);
}

.project-card:hover .project-image img[src*="earth"] {
    transform: scale(1.05);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.project-status {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(14, 165, 233, 0.9);
    color: white;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--border-radius-full);
    backdrop-filter: blur(4px);
}

.project-content {
    padding: var(--spacing-lg);
}

.project-content h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.project-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--border-radius-full);
    border: 1px solid var(--color-border);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-primary);
    font-weight: 600;
    transition: gap var(--transition-speed) var(--transition-smooth);
}

.project-link:hover,
.project-link:focus {
    gap: var(--spacing-sm);
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-item {
    display: flex;
    gap: var(--spacing-md);
}

.contact-item svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-item h3 {
    font-size: var(--font-size-lg);
    margin-bottom: 0.25rem;
}

.contact-item p,
.contact-item a {
    color: var(--color-text-secondary);
}

.contact-item a:hover,
.contact-item a:focus {
    color: var(--color-primary);
}

/* Contact Form */
.contact-form {
    background: var(--color-card-bg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed) var(--transition-smooth);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-note {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.form-note code {
    padding: 0.125rem 0.375rem;
    background: var(--color-bg-tertiary);
    border-radius: 0.25rem;
    font-family: 'Courier New', monospace;
    font-size: 0.875em;
    color: var(--color-primary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.footer-brand p {
    color: var(--color-text-secondary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--color-text-secondary);
    transition: color var(--transition-speed) var(--transition-smooth);
}

.footer-column a:hover,
.footer-column a:focus {
    color: var(--color-primary);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin: 0;
}

/* ============================================
   Responsive Design
   ============================================ */

/* Tablets and below */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --spacing-3xl: 4rem;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--header-height));
        background: var(--color-bg);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding: var(--spacing-xl);
        gap: var(--spacing-md);
        border-right: 1px solid var(--color-border);
        transition: left 0.3s var(--transition-smooth);
        overflow-y: auto;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle[aria-expanded="true"] .hamburger:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .mobile-menu-toggle[aria-expanded="true"] .hamburger:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle[aria-expanded="true"] .hamburger:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .journey-content {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile devices */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .social-links {
        flex-direction: column;
    }
    
    .social-links a {
        justify-content: center;
        width: 100%;
    }
    
    .interests-list {
        grid-template-columns: 1fr;
    }
}

/* Large screens */
@media (min-width: 1400px) {
    :root {
        --container-width: 1320px;
    }
}

/* Focus visible styles for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .theme-toggle,
    .mobile-menu-toggle,
    .hero-actions,
    .contact-form {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}