/* ===========================
   PORTFOLIO CSS - Google Developers Style
   =========================== */

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

:root {
    /* Color Palette - Google-inspired */
    --primary-blue: #1a73e8;
    --primary-blue-dark: #1557b0;
    --secondary-blue: #4285f4;
    --google-red: #ea4335;
    --google-yellow: #fbbc04;
    --google-green: #34a853;
    
    /* Neutral Colors */
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-light: #80868b;
    --background: #ffffff;
    --background-light: #f8f9fa;
    --background-dark: #f1f3f4;
    --border-color: #dadce0;
    
    /* Typography */
    --font-primary: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-logo: 'Gochi Hand', -apple-system, BlinkMacSystemFont, 'Segoe UI', serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-secondary);
    color: var(--text-primary);
    background-color: var(--background);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

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

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

/* Container */
.container, .dev-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   HEADER
   =========================== */
.header {
    background-color: var(--background);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
}

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

.logo h1 {
    font-size: 24px;
    font-weight: 500;
    font-family: var(--font-logo);
    color: var(--text-primary);
    margin: 0;
}

.logo-accent {
    color: var(--primary-blue);
}

a {
  text-decoration: none;
}

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

.nav-link {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-blue);
    background-color: var(--background-light);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xxl) 0;
    text-align: center;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 20px;
    opacity: 0.95;
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

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

/* ===========================
   BUTTONS
   =========================== */
.butn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    text-align: center;
}

.butn-primary {
    background-color: white;
    color: var(--primary-blue);
}

.butn-primary:hover {
    background-color: var(--background-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.butn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.butn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-link {
    color: var(--primary-blue);
    font-weight: 500;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    transition: all var(--transition-fast);
}

.btn-link:hover {
    color: var(--primary-blue-dark);
    transform: translateX(4px);
}

.btn-link-secondary {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    transition: all var(--transition-fast);
}

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

/* ===========================
   SECTIONS
   =========================== */
.section-title {
    font-size: 36px;
    font-weight: 500;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* ===========================
   PROJECTS SECTION
   =========================== */
.projects {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-light);
}

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

.project-card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.project-card-placeholder {
    opacity: 0.6;
    cursor: default;
}

.project-card-placeholder:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--border-color);
}

.project-icon {
    width: 48px;
    height: 48px;
    background-color: var(--background-light);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-blue);
}

.project-title {
    font-size: 24px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.project-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

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

.tag {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--background-light);
    color: var(--text-secondary);
    font-size: 12px;
    border-radius: 16px;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

/* ===========================
   ABOUT SECTION
   =========================== */
.about {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background);
}

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

.about-text {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

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

.tech-stack h3 {
    font-size: 20px;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-sm);
}

.tech-item {
    background-color: var(--background-light);
    padding: var(--spacing-sm);
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.tech-item:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

.tech-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

/* ===========================
   CONTACT SECTION
   =========================== */
.contact {
    padding: var(--spacing-xxl) 0;
    background-color: var(--background-light);
    text-align: center;
}

.contact-text {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.contact-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.contact-btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--primary-blue);
    color: white;
    border-radius: 4px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.contact-btn:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-2px);
    color: white;
    box-shadow: 0 4px 12px rgba(26, 115, 232, 0.3);
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    font-size: 14px;
    opacity: 0.8;
    margin: 0;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .nav {
        gap: var(--spacing-sm);
    }
    
    .nav-link {
        padding: var(--spacing-xs);
        font-size: 13px;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero {
        padding: var(--spacing-xl) 0;
    }
    
    .projects, .about, .contact {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .project-links {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .contact-links {
        flex-direction: column;
    }
    
    .contact-btn {
        width: 100%;
    }
}

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

.project-card {
    animation: fadeIn var(--transition-slow) ease-out;
}

/* ===========================
   UTILITY CLASSES
   =========================== */
.text-center {
    text-align: center;
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

/* ===========================
   SMOOTH SCROLLING
   =========================== */
html {
    scroll-behavior: smooth;
}