/* Main Styles - Portfolio Page */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Custom Properties */
:root {
    /* Brand Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Neutral Colors */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Background Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-card: #1e1e1e;
    --bg-hover: #2a2a2a;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    
    /* Spacing System */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1.125rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-size: 200% 200%;
    animation: gradientShift 3s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

/* Header */
.portfolio-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-800);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

.portfolio-header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: -2px;
}

/* Navigation */
.main-nav {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at bottom, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    padding: 2rem;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text {
    max-width: 600px;
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-description {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: var(--space-lg);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card {
    width: 300px;
    height: 300px;
    background: var(--bg-card);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--gray-800);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.hero-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.hero-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}

.card-content {
    text-align: center;
    padding: var(--space-xl);
}

.ai-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Sections */
section {
    padding: var(--space-4xl) 0;
    position: relative;
}

section:nth-child(even) {
    background: var(--bg-secondary);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-title {
    margin-bottom: var(--space-md);
}

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

/* Workflow Section */
.workflow {
    background: var(--bg-secondary);
}

.workflow-container {
    position: relative;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.workflow-nodes {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
    flex-wrap: wrap;
    justify-content: center;
}

.workflow-node {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    text-align: center;
    border: 1px solid var(--gray-800);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    min-width: 150px;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.workflow-node:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.workflow-node.active {
    border-color: var(--success-color);
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

.node-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto var(--space-md);
    color: white;
}

.node-title {
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.node-status {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.workflow-connection {
    width: 60px;
    height: 2px;
    background: var(--gray-700);
    position: relative;
    opacity: 0;
    transform: scaleX(0);
    animation: expandWidth 0.6s ease forwards;
}

.workflow-connection::after {
    content: '';
    position: absolute;
    top: -2px;
    right: -4px;
    width: 0;
    height: 0;
    border-left: 6px solid var(--gray-700);
    border-top: 3px solid transparent;
    border-bottom: 3px solid transparent;
}

.workflow-connection.active {
    background: var(--primary-color);
}

.workflow-connection.active::after {
    border-left-color: var(--primary-color);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes expandWidth {
    to {
        opacity: 1;
        transform: scaleX(1);
    }
}

/* Form Styles */
.form-message {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    margin-top: var(--space-lg);
    font-weight: 500;
}

.form-message-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-message-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.field-error {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

input.error,
textarea.error {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
        text-align: center;
    }
    
    .hero-title {
        font-size: 3.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .main-nav {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: var(--space-xl);
        border-top: 1px solid var(--gray-800);
        transition: top var(--transition-normal);
    }
    
    .main-nav.active {
        top: 100%;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .workflow-nodes {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .workflow-connection {
        width: 2px;
        height: 40px;
        transform: scaleY(0);
    }
    
    .workflow-connection::after {
        top: -4px;
        left: -2px;
        border-left: 3px solid transparent;
        border-right: 3px solid transparent;
        border-top: 6px solid var(--gray-700);
        border-left: none;
    }
    
    .workflow-connection.active::after {
        border-top-color: var(--primary-color);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-card {
        width: 250px;
        height: 250px;
    }
}

/* Animation Classes */
[data-aos] {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

[data-aos="fade-up"] {
    transform: translateY(20px);
}

[data-aos="fade-down"] {
    transform: translateY(-20px);
}

[data-aos="fade-left"] {
    transform: translateX(-20px);
}

[data-aos="fade-right"] {
    transform: translateX(20px);
}

[data-aos="scale-in"] {
    transform: scale(0.8);
}

/* Loading States */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Skills Section */
.skills {
    padding: var(--space-4xl) 0;
    background: var(--bg-secondary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-2xl);
}

.skill-category {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl);
    border: 1px solid var(--gray-800);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.skill-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.skill-category h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--border-radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--gray-800);
    transition: all var(--transition-normal);
}

.skill-tag:hover {
    background: var(--primary-color);
    color: var(--text-primary);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Responsive Design for Skills */
@media (max-width: 768px) {
    .skills-grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .skill-category {
        padding: var(--space-xl);
    }
    
    .skill-category-header {
        flex-direction: column;
        text-align: center;
        gap: var(--space-sm);
    }
}

/* Professional Summary Section */
.summary {
    padding: var(--space-4xl) 0;
    background: var(--bg-primary);
}

.summary-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: stretch;
}

/* Apply spotlight card styling to summary sections */
.summary-text.summary-spotlight-card,
.summary-stats.summary-spotlight-card {
    position: relative;
    border-radius: 1.5rem;
    border: 1px solid #222;
    background-color: #111;
    padding: 2.5rem;
    overflow: hidden;
    --mouse-x: 50%;
    --mouse-y: 50%;
    --spotlight-color: rgba(0, 229, 255, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.summary-text.summary-spotlight-card:hover,
.summary-stats.summary-spotlight-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.summary-text.summary-spotlight-card::before,
.summary-stats.summary-spotlight-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at var(--mouse-x) var(--mouse-y), var(--spotlight-color), transparent 80%);
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.summary-text.summary-spotlight-card:hover::before,
.summary-text.summary-spotlight-card:focus-within::before,
.summary-stats.summary-spotlight-card:hover::before,
.summary-stats.summary-spotlight-card:focus-within::before {
    opacity: 0.6;
}

.summary-description {
    font-size: 1.5rem;
    line-height: 1.7;
    color: #d0d0d0;
    margin-bottom: var(--space-4xl);
    position: relative;
    z-index: 2;
}

.summary-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    position: relative;
    z-index: 2;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
}

.highlight-icon {
    font-size: 2rem;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.highlight-text h4 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    margin: 0 0 var(--space-sm) 0;
}

.highlight-text p {
    font-size: 1.2rem;
    color: #d0d0d0;
    margin: 0;
    line-height: 1.6;
}

.summary-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    position: relative;
    z-index: 2;
}

.stat-item {
    text-align: center;
    padding: var(--space-xl);
    background: rgba(0, 229, 255, 0.05);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(0, 229, 255, 0.2);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
    background: rgba(0, 229, 255, 0.1);
    border-color: rgba(0, 229, 255, 0.4);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #00e5ff 0%, #0080ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-sm);
}

.stat-label {
    font-size: 1.1rem;
    color: #d0d0d0;
    font-weight: 500;
}

/* Responsive Design for Summary */
@media (max-width: 1024px) {
    .summary-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }
    
    .summary-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .summary-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .summary-stats {
        grid-template-columns: 1fr;
    }
    
    .highlight-item {
        flex-direction: column;
        text-align: center;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }