/*
Theme Name: Rahul Portfolio
Description: A modern and dynamic portfolio theme, child theme of Twenty Twenty-Five
Author: Rahul Goel
Template: twentytwentyfive
Version: 1.0
License: GNU General Public License v2 or later
Text Domain: rahul-portfolio
Tags: portfolio, mobile-first, responsive, modern, dark-mode

This theme is designed to showcase your development skills and projects in a modern, interactive way.
*/

/* Import parent theme styles */
@import url('../twentytwentyfive/style.css');

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

/* Base Variables */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #3b82f6;
    --accent-color: #0ea5e9;
    --text-color: #1f2937;
    --text-color-light: #4b5563;
    --background-color: #ffffff;
    --bg-color: var(--background-color);
    --surface-color: #f3f4f6;
    --bg-color-alt: var(--surface-color);
    --border-color: #e5e7eb;
    --heading-color: #111827;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    
    /* Dark Mode Colors */
    --dark-bg: #0f172a;
    --dark-bg-alt: #1e293b;
    --dark-text: #e2e8f0;
    --dark-text-light: #94a3b8;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --heading-font: var(--font-family);
    --body-font: var(--font-family);
    --base-font-size: 16px;
    --line-height: 1.6;
    
    /* Spacing */
    --container-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Borders */
    --border-radius-sm: 4px;
    --radius-sm: var(--border-radius-sm);
    --border-radius: 8px;
    --radius-md: var(--border-radius);
    --border-radius-lg: 12px;
    --radius-lg: var(--border-radius-lg);
    --border-radius-full: 9999px;
    --radius-full: var(--border-radius-full);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 6px 12px -2px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 20px -5px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px var(--primary-color);
    
    /* Animations */
    --transition-speed: 0.3s;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all var(--transition-speed) var(--transition-timing);
    --transition-smooth: all 0.5s var(--transition-timing);
    
    /* Profile Photo */
    --profile-photo-size: 180px;
    --profile-photo-border: 4px;
}

/* Dark Mode */
.dark-mode {
    --text-color: var(--dark-text);
    --text-color-light: var(--dark-text-light);
    --background-color: var(--dark-bg);
    --bg-color: var(--dark-bg);
    --surface-color: var(--dark-bg-alt);
    --bg-color-alt: var(--dark-bg-alt);
    --border-color: #374151;
    --heading-color: var(--dark-text);
}

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

html {
    font-size: var(--base-font-size);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: var(--background-color);
    line-height: var(--line-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-speed) var(--transition-timing),
                color var(--transition-speed) var(--transition-timing);
}

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

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

@media (min-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Sections */
section {
    padding: 6rem 0;
}

.section-title {
    font-size: 2.5rem;
    color: var(--heading-color);
    text-align: center;
    margin-bottom: 3rem;
}

/* Hero Section */
.hero-section {
    position: relative;
    padding: 8rem 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

@media (min-width: 768px) {
    .hero-content {
        text-align: left;
    }
}

.hero-profile-photo {
    margin: 0 auto var(--spacing-lg);
    position: relative;
    width: var(--profile-photo-size);
    height: var(--profile-photo-size);
    border-radius: var(--border-radius-full);
    overflow: hidden;
    border: var(--profile-photo-border) solid var(--primary-color);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-speed) var(--transition-timing),
                box-shadow var(--transition-speed) var(--transition-timing);
}

@media (min-width: 768px) {
    .hero-profile-photo {
        margin: 0 0 var(--spacing-lg);
    }
}

.hero-profile-photo:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.hero-profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--border-radius-full);
    transition: transform var(--transition-speed) var(--transition-timing);
}

.hero-profile-photo:hover img {
    transform: scale(1.05);
}

.hero-intro {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--heading-color);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: clamp(1.125rem, 4vw, 1.5rem);
    color: var(--text-color-light);
    margin-bottom: 20px;
    max-width: 600px;
}

/* Social Links Split Layout */
.split-social {
    display: flex;
    justify-content: flex-start;
    gap: 2rem;
    width: 100%;
    margin-bottom: 1rem;
}

.social-left, .social-right {
    display: flex;
    align-items: center;
}

.social-link {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    transition: all var(--transition-speed);
    padding: 0.5rem;
}

.social-link:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    opacity: 0.8;
}

.social-link svg {
    fill: currentColor;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-speed);
}

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

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

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

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

/* Portfolio Grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 2rem;
    padding: 0.5rem;
}

.portfolio-item {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15), 
                0 -0.25rem 1rem rgba(0, 0, 0, 0.08), 
                0.25rem 0 1rem rgba(0, 0, 0, 0.08), 
                -0.25rem 0 1rem rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
    background-color: var(--surface-color);
}

.portfolio-image img {
    width: 100%;
    display: block;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay-content {
    text-align: center;
    padding: 1.5rem;
    color: white;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay-content {
    transform: translateY(0);
}

.portfolio-content {
    padding: 1.5rem;
}

.portfolio-content h3 {
    margin: 0 0 0.5rem;
    font-size: 1.25rem;
    color: var(--text-color);
}

.portfolio-content p {
    margin: 0;
    color: var(--text-color-light);
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Portfolio Filters */
.portfolio-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.filter-btn {
    padding: 0.6rem 1.2rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-full);
    background: none;
    color: var(--text-color);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover,
.filter-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Skills Section */
.skills-section {
    padding: 5rem 0;
    background: var(--background-color);
}

.skills-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    max-width: 900px;
    margin: 0 auto;
}

.skill-tag {
    padding: 0.75rem 1.5rem;
    border-radius: 3rem;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    background: var(--surface-color);
    transition: all 0.3s ease;
    cursor: default;
}

.skill-tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.skill-tag.expert {
    background: var(--primary-color);
    color: white;
}

.skill-tag.advanced {
    background: var(--secondary-color);
    color: white;
}

.skill-tag.proficient {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    padding: 1rem 0;
}

.service-item {
    text-align: center;
    padding: 2.5rem 2rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    transition: all var(--transition-speed);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.service-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.service-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.service-item:hover::before {
    opacity: 1;
}

.service-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
    color: var(--primary-color);
}

.service-item h3 {
    font-size: 1.5rem;
    color: var(--heading-color);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.service-item p {
    color: var(--text-color-light);
    margin: 0;
    font-size: 0.95rem;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

/* Process Section */
.process-section {
    background-color: var(--surface-color);
    position: relative;
    overflow: hidden;
    padding: 8rem 0;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    position: relative;
    z-index: 2;
}

.process-item {
    background-color: var(--background-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.process-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.process-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.process-item:hover::before {
    opacity: 1;
}

.process-number {
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    opacity: 0.1;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    line-height: 1;
    font-family: var(--heading-font);
}

.process-icon {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    position: relative;
    z-index: 1;
}

.process-icon svg {
    width: 100%;
    height: 100%;
}

.process-item h3 {
    font-size: 1.5rem;
    color: var(--heading-color);
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.process-item p {
    color: var(--text-color);
    margin: 0;
    position: relative;
    z-index: 1;
    line-height: 1.6;
}

/* Process card hover effect */
.process-item:hover .process-icon {
    transform: scale(1.1);
    transition: transform var(--transition-speed);
}

.process-item:hover h3 {
    color: var(--primary-color);
    transition: color var(--transition-speed);
}

/* Testimonials Section */
.testimonials-section {
    position: relative;
    overflow: hidden;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.testimonial-item {
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    position: relative;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
    box-shadow: var(--shadow);
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

[data-animation] {
    opacity: 0;
}

[data-animation].animate {
    animation: fadeInUp 0.6s var(--transition-timing) forwards;
}

[data-animation-delay] {
    animation-delay: var(--animation-delay);
}

.animate-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Dark Mode */
.dark-mode .portfolio-item,
.dark-mode .process-item,
.dark-mode .service-item,
.dark-mode .testimonial-item {
    background-color: var(--dark-bg-alt);
}

.dark-mode .profile-photo {
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-sm);
    max-width: var(--container-width);
    margin: 0 auto;
}

.site-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.site-title a {
    color: var(--heading-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.site-title a:hover {
    color: var(--primary-color);
}

.main-navigation {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-color);
    position: relative;
    transition: all 0.3s ease;
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    left: 0;
    transition: all 0.3s ease;
}

.menu-icon::before {
    top: -8px;
}

.menu-icon::after {
    bottom: -8px;
}

.menu-toggle[aria-expanded="true"] .menu-icon {
    background-color: transparent;
}

.menu-toggle[aria-expanded="true"] .menu-icon::before {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-icon::after {
    transform: translateY(-8px) rotate(-45deg);
}

.dark-mode-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.dark-mode-toggle:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Header scroll effect */
.site-header.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Responsive Navigation */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
        z-index: 1001;
    }

    .main-navigation {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 300px;
        height: 100vh;
        background-color: var(--bg-color);
        flex-direction: column;
        justify-content: flex-start;
        padding: 5rem 2rem 2rem;
        transition: right 0.3s ease;
    }

    .main-navigation.toggled {
        right: 0;
    }

    .dark-mode-toggle {
        margin-top: 2rem;
        width: 100%;
    }
}

.skills-description {
    font-size: 1.1rem;
    color: var(--text-color-light);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 700px;
    text-align: center;
    margin-left: auto;
    margin-right: auto;
}

.skills-description::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.1;
    position: absolute;
    left: -20px;
    top: -10px;
}

/* Footer */
.site-footer {
    background-color: var(--bg-color);
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--border-color);
}

.site-info {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    text-align: center;
}

.site-info p {
    margin: 0;
    color: var(--text-color-light);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        max-width: 90%;
    }

    .hero-title {
        font-size: 5rem;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .portfolio-content-wrap {
        grid-template-columns: 1fr;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .process-grid {
        grid-template-columns: 1fr;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .split-social {
        gap: 1.5rem;
    }
}

@media (max-width: 480px) {
    .social-link {
        padding: 0.35rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-intro {
        font-size: 1.25rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }
}