/* ===== MODERN PORTFOLIO CSS WITH INNOVATIVE OVERLAPPING SOLUTION ===== */

/* CSS Variables for Theme Management */
:root {
    /* Light Theme Colors */
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-alt: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    --shadow-heavy: rgba(0, 0, 0, 0.25);
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    
    /* Spacing */
    --section-padding: 5rem 0;
    --container-padding: 0 2rem;
    
    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition-medium: all 0.3s ease;
    --transition-slow: all 0.5s ease;
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    
    /* Innovative Spacing Variables */
    --hero-social-offset: 0px;
    --about-margin-dynamic: 2rem;
}

/* Dark Theme */
[data-theme="dark"] {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #f7fafc;
    --text-secondary: #e2e8f0;
    --text-muted: #a0aec0;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-alt: #4a5568;
    --border-color: #4a5568;
    --shadow-light: rgba(0, 0, 0, 0.3);
    --shadow-medium: rgba(0, 0, 0, 0.4);
    --shadow-heavy: rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    /* Enhanced scrolling performance */
    -webkit-overflow-scrolling: touch;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition-medium);
    overflow-x: hidden;
    /* Enhanced scrolling performance */
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-perspective: 1000;
    perspective: 1000;
}

/* ===== NAVIGATION WITH SCROLL EFFECTS ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-smooth);
    transform: translateY(0);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: 0 4px 20px var(--shadow-light);
}

.navbar.hidden {
    transform: translateY(-100%);
}

[data-theme="dark"] .navbar {
    background: rgba(26, 32, 44, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-medium);
}

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

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

.nav-menu {
    display: flex;
    gap: 2rem;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

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

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: rotate(180deg);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ===== HERO SECTION WITH INNOVATIVE SOCIAL POSITIONING ===== */
.hero {
    min-height: 100vh;
    background: var(--gradient-hero);
    position: relative;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
    position: relative;
    z-index: 2;
}

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

.hero-text-center {
    width: 100%;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-bold);
    color: white;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-align: center;
}

.name-highlight {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
    min-height: 2.5rem;
    text-align: center;
    width: 100%;
}

.typing-text {
    display: block;
    width: 100%;
    text-align: center;
}

#typed-text {
    color: #f093fb;
    font-weight: var(--font-weight-semibold);
}

.cursor {
    animation: blink 1s infinite;
    color: #f093fb;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.8);
    margin: 0 auto 2rem;
    max-width: 500px;
    text-align: center;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

/* INNOVATIVE HERO SOCIAL LINKS WITH SCROLL-AWARE POSITIONING */
.hero-social-links {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: center;
    position: relative;
    z-index: 10;
    transform: translateY(var(--hero-social-offset));
    transition: var(--transition-smooth);
}

.hero-social-links.floating {
    position: fixed;
    top: 50%;
    right: 2rem;
    flex-direction: column;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
    padding: 1rem 0.5rem;
    border-radius: 25px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeInFloat 0.5s ease;
}

[data-theme="dark"] .hero-social-links.floating {
    background: rgba(26, 32, 44, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-social-links.floating a {
    margin: 0.25rem 0;
    width: 40px;
    height: 40px;
    font-size: 1rem;
}

@keyframes fadeInFloat {
    from {
        opacity: 0;
        transform: translateY(-50%) translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

.hero-social-links a {
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    transition: var(--transition-medium);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.hero-social-links a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-accent);
    transition: var(--transition-medium);
    z-index: -1;
}

.hero-social-links a:hover::before {
    left: 0;
}

.hero-social-links a:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    border-color: transparent;
}


/* ===== SECTIONS WITH DYNAMIC SPACING ===== */
.section {
    padding: var(--section-padding);
    position: relative;
    transition: var(--transition-medium);
}

/* INNOVATIVE ABOUT SECTION WITH ADAPTIVE SPACING */
#about {
    margin-top: var(--about-margin-dynamic);
    transition: margin-top 0.3s ease-out, padding-top 0.3s ease-out;
    /* Prevent layout thrashing during scroll */
    will-change: margin-top, padding-top;
}

#about.expanded-spacing {
    margin-top: 3rem;
    padding-top: 4rem;
}

.section-alt {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-alt) 100%);
}

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

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
}

.section-title.animated {
    opacity: 1;
    transform: translateY(0);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* ===== ABOUT SECTION WITH ENHANCED LAYOUT ===== */
.about-content {
    text-align: center;
}

.about-description {
    font-size: 1.2rem;
    color: var(--text-primary);
    max-width: 700px;
    margin: 0 auto 3rem;
    line-height: 1.8;
    background: var(--bg-primary);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px var(--shadow-light);
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-slow);
    position: relative;
    z-index: 5;
}

.about-description.animated {
    opacity: 1;
    transform: translateY(0);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-primary);
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-light);
    transition: var(--transition-medium);
    opacity: 0;
    transform: translateY(30px) scale(0.9);
    position: relative;
    overflow: hidden;
}

.stat-item.animated {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.05;
    transition: var(--transition-medium);
    z-index: 1;
}

.stat-item:hover::before {
    left: 0;
}

.stat-item:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 20px 50px var(--shadow-medium);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 2;
}

.stat-label {
    color: var(--text-muted);
    font-weight: var(--font-weight-medium);
    position: relative;
    z-index: 2;
}

/* ===== EXPERIENCE SECTION ===== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    height: 100%;
    background: var(--gradient-primary);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin: 4rem 0;
    opacity: 0;
    transform: translateX(-50px);
    transition: var(--transition-slow);
}

.timeline-item.animated {
    opacity: 1;
    transform: translateX(0);
}

.timeline-marker {
    position: absolute;
    left: 50%;
    top: 2rem;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 3;
}

.timeline-content {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 15px;
    margin-left: 60%;
    box-shadow: 0 10px 30px var(--shadow-light);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -15px;
    top: 2rem;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 15px 15px 15px 0;
    border-color: transparent var(--bg-primary) transparent transparent;
}

.timeline-header h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.company {
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
    font-size: 1.1rem;
}

.duration {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: block;
    margin-top: 0.25rem;
}

.timeline-description ul {
    margin: 1rem 0;
    color: var(--text-secondary);
    list-style: none;
    padding-left: 0;
}

.timeline-description li {
    margin: 0.5rem 0;
    padding-left: 1rem;
    position: relative;
}

.timeline-description li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 0.8rem;
}

.awards {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.award-badge {
    background: var(--gradient-accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 20px;
    box-shadow: 0 10px 30px var(--shadow-light);
    transition: var(--transition-medium);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

.skill-category.animated {
    opacity: 1;
    transform: translateY(0);
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.03;
    transition: var(--transition-medium);
}

.skill-category:hover::before {
    left: 0;
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px var(--shadow-medium);
}

.skill-category h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 25px;
    font-size: 0.85rem;
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

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

/* ===== PROJECTS SECTION ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px var(--shadow-light);
    transition: var(--transition-medium);
    opacity: 0;
    transform: translateY(30px);
    position: relative;
    overflow: hidden;
}

.project-card.animated {
    opacity: 1;
    transform: translateY(0);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.02;
    transition: var(--transition-medium);
}

.project-card:hover::before {
    left: 0;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px var(--shadow-medium);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.project-header h3 {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.project-link {
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech-tag {
    background: var(--gradient-primary);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
}

.tech-tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-light);
}

/* ===== CONTACT SECTION ===== */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-form {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow-light);
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-family);
    transition: var(--transition-fast);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-secondary);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    color: var(--text-muted);
}

/* ===== MOBILE STYLES ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 3rem;
        transition: var(--transition-smooth);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero-social-links.floating {
        display: none;
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-content {
        margin-left: 60px;
        margin-right: 0;
    }

    .timeline-content::before {
        left: -15px;
    }

    .timeline-marker {
        left: 20px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 200px;
        justify-content: center;
    }

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

    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    #about.expanded-spacing {
        margin-top: 2rem;
        padding-top: 3rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

    .stat-item {
        padding: 1.5rem;
    }

    .about-description {
        padding: 1.5rem;
        font-size: 1.1rem;
    }
}

/* ===== SMOOTH ANIMATIONS ===== */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.slide-up {
    animation: slideUp 0.6s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== ENHANCED AI CHATBOT STYLES ===== */

/* Chatbot Container */
.chatbot-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 9999;
    font-family: var(--font-family);
}

/* Chat Toggle Button */
.chat-button {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 8px 25px var(--shadow-medium);
    transition: var(--transition-medium);
    border: none;
    overflow: hidden;
    animation: chatBounce 2s infinite ease-in-out;
}

.chat-button:hover {
    transform: scale(1.1);
    box-shadow: 0 12px 35px var(--shadow-heavy);
}

.chat-button-icon {
    color: white;
    font-size: 1.5rem;
    z-index: 2;
    transition: var(--transition-fast);
}

.chat-button.active .chat-button-icon {
    transform: rotate(180deg);
}

/* Pulse Animation */
.chat-button-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 2s infinite;
    opacity: 0.6;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    70% {
        transform: translate(-50%, -50%) scale(1.4);
        opacity: 0;
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0;
    }
}

@keyframes chatBounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-5px);
    }
    60% {
        transform: translateY(-3px);
    }
}

/* Chat Window */
.chat-window {
    position: fixed;
    bottom: 80px;
    right: 2rem;
    width: 380px;
    height: 500px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    box-shadow: 0 20px 60px var(--shadow-heavy);
    transform: translateY(20px) scale(0.8);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

@media (max-width: 768px) {
    .chat-window {
        right: 1rem;
    }

    .chat-button {
        right: 1rem;
    }
}

@media (max-width: 480px) {
    .chat-window {
        right: 0.5rem;
    }
}


[data-theme="dark"] .chat-window {
    background: rgba(26, 32, 44, 0.95);
    border-color: rgba(255, 255, 255, 0.1);
}

.chat-window.active {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: all;
}

/* Chat Header */
.chat-header {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--gradient-primary);
    color: white;
    border-radius: 20px 20px 0 0;
    position: relative;
    overflow: hidden;
}

.chat-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    animation: shimmer 3s infinite;
}

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

.chat-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 0.75rem;
    font-size: 1.2rem;
}

.chat-header-info {
    flex: 1;
}

.chat-title {
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    margin-bottom: 0.2rem;
}

.chat-status {
    font-size: 0.8rem;
    opacity: 0.9;
    display: flex;
    align-items: center;
}

.chat-status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    margin-right: 0.5rem;
    animation: statusPulse 2s infinite;
}

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

.chat-close {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 2px;
    opacity: 0.5;
}

.chat-message {
    display: flex;
    margin-bottom: 1rem;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-message {
    justify-content: flex-end;
}

.user-message .message-content {
    order: -1;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    margin: 0 0.5rem;
    flex-shrink: 0;
}

.bot-message .message-avatar {
    background: var(--gradient-primary);
    color: white;
}

.user-message .message-avatar {
    background: var(--gradient-accent);
    color: white;
}

.message-content {
    max-width: 75%;
    display: flex;
    flex-direction: column;
}

.message-bubble {
    background: var(--bg-secondary);
    border-radius: 18px;
    padding: 0.75rem 1rem;
    position: relative;
    box-shadow: 0 2px 8px var(--shadow-light);
    transition: var(--transition-fast);
}

[data-theme="dark"] .message-bubble {
    background: var(--bg-alt);
}

.user-message .message-bubble {
    background: var(--primary-color);
    color: white;
    margin-left: 2rem;
}

.user-message .message-bubble::before {
    content: '';
    position: absolute;
    top: 0.75rem;
    right: -8px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 0 8px 8px;
    border-color: transparent transparent transparent var(--primary-color);
}

.bot-message .message-bubble::before {
    content: '';
    position: absolute;
    top: 0.75rem;
    left: -8px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 8px 8px 8px 0;
    border-color: transparent var(--bg-secondary) transparent transparent;
}

[data-theme="dark"] .bot-message .message-bubble::before {
    border-color: transparent var(--bg-alt) transparent transparent;
}

.message-text {
    line-height: 1.4;
    font-size: 0.9rem;
    word-wrap: break-word;
}

/* Apple-Style Typing Indicator */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0.5rem 0;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typingDot 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
    animation-delay: 0s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingDot {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: scale(0.8);
    }
    30% {
        opacity: 1;
        transform: scale(1);
    }
}

/* Chat Input */
.chat-input-container {
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: 0 0 20px 20px;
    border-top: 1px solid var(--border-color);
}

.chat-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border-radius: 25px;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#chat-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-primary);
    padding: 0.5rem 0;
    font-size: 0.9rem;
    resize: none;
}

#chat-input::placeholder {
    color: var(--text-muted);
}

.chat-send-btn {
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-left: 0.5rem;
}

.chat-send-btn:hover:not(:disabled) {
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.chat-send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Chat Suggestions */
.chat-suggestions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.suggestion-btn {
    background: var(--bg-alt);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

.suggestion-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .chatbot-container {
        bottom: 1rem;
        right: 1rem;
    }

    .chat-window {
        width: calc(100vw - 2rem);
        max-width: 350px;
        height: 80vh;
        max-height: 500px;
        right: -1rem;
    }

    .chat-button {
        width: 55px;
        height: 55px;
    }

    .chat-button-icon {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .chat-window {
        width: calc(100vw - 1rem);
        right: -0.5rem;
        bottom: 70px;
    }

    .chat-suggestions {
        flex-direction: column;
    }

    .suggestion-btn {
        text-align: center;
    }
}

/* Loading Animation */
.chat-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: 18px;
    margin-bottom: 1rem;
    animation: messageSlideIn 0.3s ease;
}

.chat-loading .typing-indicator {
    padding: 0;
}

/* Success Animation */
@keyframes messageSuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.message-sent {
    animation: messageSuccess 0.3s ease;
}