/* 
 * Nebula Portfolio - Main Stylesheet
 * Purple Nebula / Galaxy Theme
 */

/* ===================================
   CSS VARIABLES
   =================================== */
:root {
    /* Colors - Purple Nebula Palette */
    --color-primary: #8b5cf6;
    --color-primary-light: #a78bfa;
    --color-primary-dark: #6d28d9;
    --color-secondary: #ec4899;
    --color-accent: #f472b6;
    
    /* Background Colors */
    --color-bg-dark: #0a0a1f;
    --color-bg-darker: #050510;
    --color-bg-card: rgba(17, 17, 45, 0.6);
    --color-bg-card-hover: rgba(17, 17, 45, 0.8);
    
    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #c7d2fe;
    --color-text-muted: #94a3b8;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --gradient-nebula: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.15) 0%, transparent 70%);
    --gradient-accent: linear-gradient(135deg, #6d28d9 0%, #8b5cf6 50%, #ec4899 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Segoe UI', system-ui, sans-serif;
    
    /* Borders */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-header: 1000;
    --z-cosmic-bg: -1;
}

/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-darker);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ===================================
   COSMIC BACKGROUND
   =================================== */
.cosmic-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-cosmic-bg);
    overflow: hidden;
    background: var(--color-bg-darker);
}

.nebula-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

.nebula-1 {
    top: -10%;
    left: -10%;
    width: 50%;
    height: 50%;
    background: radial-gradient(circle at center, rgba(139, 92, 246, 0.15) 0%, transparent 60%);
    animation-delay: 0s;
}

.nebula-2 {
    bottom: -20%;
    right: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(circle at center, rgba(236, 72, 153, 0.12) 0%, transparent 65%);
    animation-delay: 5s;
}

.nebula-3 {
    top: 40%;
    left: 30%;
    width: 40%;
    height: 40%;
    background: radial-gradient(circle at center, rgba(109, 40, 217, 0.1) 0%, transparent 70%);
    animation-delay: 10s;
}

.stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 60px 70px, rgba(255, 255, 255, 0.2), transparent),
        radial-gradient(1px 1px at 50px 50px, rgba(255, 255, 255, 0.4), transparent),
        radial-gradient(1px 1px at 130px 80px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 90px 10px, rgba(255, 255, 255, 0.2), transparent);
    background-size: 200px 200px;
    background-repeat: repeat;
    animation: twinkle 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

@keyframes twinkle {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

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

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

/* ===================================
   LAYOUT
   =================================== */
.site-wrapper {
    position: relative;
    z-index: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* ===================================
   HEADER
   =================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-header);
    background: rgba(10, 10, 31, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    transition: all var(--transition-normal);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.25rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo .logo-link {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Navigation */
.primary-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: translateX(-50%);
    transition: width var(--transition-fast);
}

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

.nav-link:hover::after {
    width: 80%;
}

.nav-cta {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-icon {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.menu-icon span {
    width: 25px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* ===================================
   BUTTONS
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.5);
    color: var(--color-text-primary);
}

.btn-secondary {
    background: rgba(139, 92, 246, 0.1);
    color: var(--color-primary-light);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: rgba(139, 92, 246, 0.2);
    transform: translateY(-3px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary-light);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-text-primary);
    transform: translateY(-3px);
}

.btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ===================================
   HERO SECTION (HOME)
   =================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-xl) 0;
    overflow: hidden;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-title-line {
    display: block;
    margin-bottom: 0.5rem;
}

.hero-title-accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Hero Background Accents */
.hero-bg-accent {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 15s ease-in-out infinite;
}

.accent-1 {
    width: 400px;
    height: 400px;
    background: var(--color-primary);
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.accent-2 {
    width: 500px;
    height: 500px;
    background: var(--color-secondary);
    bottom: 10%;
    right: -15%;
    animation-delay: 5s;
}

.accent-3 {
    width: 300px;
    height: 300px;
    background: var(--color-primary-dark);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 10s;
}

/* ===================================
   SECTION HEADERS
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.page-header {
    padding-top: calc(var(--spacing-xl) + 80px);
    text-align: center;
}

.page-title {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   CARDS & GRIDS
   =================================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.service-card:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-10px);
    border-color: var(--color-primary);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.3);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary-light);
}

.service-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.service-description {
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ===================================
   FOOTER
   =================================== */
.site-footer {
    background: rgba(5, 5, 16, 0.9);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    position: relative;
    z-index: 2;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col h3,
.footer-col h4 {
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.75rem;
}

.footer-tagline {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer-heading {
    color: var(--color-text-primary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
}

.footer-menu {
    list-style: none;
}

.footer-menu li {
    margin-bottom: 0.5rem;
}

.footer-menu a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-menu a:hover {
    color: var(--color-primary-light);
    padding-left: 5px;
}

.footer-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.footer-btn {
    display: inline-flex;
    padding: 0.75rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    border-radius: var(--border-radius-md);
    font-weight: 600;
    transition: all var(--transition-normal);
}

.footer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.4);
    color: var(--color-text-primary);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(139, 92, 246, 0.1);
}

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

.copyright,
.footer-credits {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (max-width: 768px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }
    
    .menu-toggle {
        display: block;
        z-index: 1001;
    }
    
    .primary-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background: rgba(10, 10, 31, 0.98);
        backdrop-filter: blur(20px);
        padding: 100px 2rem 2rem;
        transition: right var(--transition-normal);
        border-left: 1px solid rgba(139, 92, 246, 0.2);
    }
    
    .primary-nav.active {
        right: 0;
    }
    
    .primary-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    
    .nav-item {
        border-bottom: 1px solid rgba(139, 92, 246, 0.1);
    }
    
    .nav-link {
        display: block;
        padding: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}