/* ============================================
   PORTFOLIO WEBSITE - STYLESHEET
   Author: Poorv Khatri
   Description: Modern, responsive portfolio CSS
   ============================================ */

/* ============================================
   1. CSS VARIABLES & ROOT STYLES
   ============================================ */

:root {
    /* Color Palette - Light Theme */
    --primary-color: #3b82f6;
    --secondary-color: #1f2937;
    --accent-color: #10b981;
    --background-light: #ffffff;
    --background-secondary-light: #f9fafb;
    --background-tertiary-light: #f3f4f6;
    --text-dark: #111827;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --border-light: #e5e7eb;
    --border-lighter: #f3f4f6;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12);
    --shadow-2xl: 0 25px 60px rgba(0, 0, 0, 0.15);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Typography */
    --font-primary: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", monospace;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Z-index Scale */
    --z-negative: -1;
    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
}

/* Dark Theme Colors */
html.dark-mode {
    --background-light: #0f172a;
    --background-secondary-light: #1a2332;
    --background-tertiary-light: #1e293b;
    --text-dark: #f1f5f9;
    --text-light: #cbd5e1;
    --text-lighter: #94a3b8;
    --border-light: #334155;
    --border-lighter: #1e293b;
    --glass-bg: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* ============================================
   2. RESET & BASE STYLES
   ============================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--background-light);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Remove default list styles */
ul, ol {
    list-style: none;
}

/* Link styles */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

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

/* Image styles */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Button base styles */
button {
    font-family: var(--font-primary);
    cursor: pointer;
    border: none;
    background: none;
}

/* ============================================
   3. UTILITY CLASSES
   ============================================ */

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

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    color: var(--text-dark);
    position: relative;
    padding-bottom: var(--spacing-xl);
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    transform-origin: center;
    animation: slideInUnderline 0.8s ease-out 0.3s forwards;
}

@keyframes slideInUnderline {
    to {
        transform: translateX(-50%) scaleX(1);
    }
}

/* Button Styles */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-xl);
    font-weight: 700;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
    font-size: 1rem;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.25), 
                0 0 30px rgba(59, 130, 246, 0.1);
    letter-spacing: 0.5px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.35),
                0 0 40px rgba(59, 130, 246, 0.15);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--background-secondary-light);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.25);
    border-color: transparent;
}

/* ============================================
   4. NAVBAR STYLES
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

html.dark-mode .navbar {
    background: var(--glass-bg);
}

.navbar.scrolled {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    backdrop-filter: blur(25px);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

/* Logo */
.nav-logo a {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-base);
    letter-spacing: -1px;
}

.nav-logo a:hover {
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.4));
}

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

.nav-link {
    font-weight: 600;
    color: var(--text-dark);
    position: relative;
    transition: all var(--transition-base);
    letter-spacing: 0.3px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width var(--transition-base);
    border-radius: 2px;
}

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

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Theme Toggle */
.theme-toggle {
    cursor: pointer;
    font-size: 1.25rem;
    color: var(--text-dark);
    transition: all var(--transition-base);
    margin-left: var(--spacing-lg);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--background-secondary-light);
}

.theme-toggle:hover {
    transform: rotate(25deg) scale(1.1);
    color: var(--primary-color);
    background-color: var(--background-tertiary-light);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background-color: var(--background-light);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
    }

    .nav-menu.active {
        max-height: 400px;
        box-shadow: var(--shadow-md);
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-light);
    }

    .nav-link {
        display: block;
        padding: var(--spacing-lg);
    }

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

    .nav-link.active {
        background-color: var(--background-secondary-light);
        border-left: 4px solid var(--primary-color);
        padding-left: calc(var(--spacing-lg) - 4px);
    }

    .theme-toggle {
        margin-left: var(--spacing-md);
    }
}

/* ============================================
   5. HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px var(--spacing-lg) var(--spacing-3xl);
    background: linear-gradient(135deg, var(--background-secondary-light) 0%, var(--background-light) 50%, #f0f9ff 100%);
    position: relative;
    overflow: hidden;
}

html.dark-mode .hero {
    background: linear-gradient(135deg, var(--background-secondary-light) 0%, var(--background-light) 50%, #1e3a5f 100%);
}

/* Animated background elements */
.hero::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0) 70%);
    border-radius: 50%;
    top: -250px;
    right: -200px;
    animation: float 8s ease-in-out infinite;
    z-index: -1;
    filter: blur(40px);
}

.hero::after {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.12) 0%, rgba(16, 185, 129, 0) 70%);
    border-radius: 50%;
    bottom: -150px;
    left: -150px;
    animation: float 10s ease-in-out infinite reverse;
    z-index: -1;
    filter: blur(40px);
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    gap: var(--spacing-3xl);
    max-width: 700px;
    margin: 0 auto;
}

.hero-text {
    animation: slideInLeft 0.8s ease-out;
    text-align: center;
    width: 100%;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1.5px;
    animation: slideInUp 0.8s ease-out;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
    letter-spacing: 0.3px;
    animation: slideInUp 0.8s ease-out 0.1s backwards;
}
.hero-description {
    font-size: 1.1rem;
    color: var(--text-light);
    margin: 0 auto var(--spacing-2xl) auto;
    line-height: 1.8;
    max-width: 550px;
    animation: slideInUp 0.8s ease-out 0.2s backwards;
    letter-spacing: 0.3px;
    width: 100%;
    text-align: center;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    margin-top: var(--spacing-xl);
}

.hero-image {
    animation: slideInUp 0.8s ease-out 0.2s backwards;
    text-align: center;
    width: 100%;
    display: flex;
    justify-content: center;
}

.profile-photo {
    position: relative;
    width: 300px;
    height: 300px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    padding: 4px;
    box-shadow: 0 0 60px rgba(59, 130, 246, 0.4),
                0 0 100px rgba(16, 185, 129, 0.2);
    animation: slideInRight 0.8s ease-out;
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: transform 0.3s ease;
}

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-light);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator i {
    font-size: 1.5rem;
}

/* Mobile Hero */
@media (max-width: 768px) {
    .hero {
        padding-top: 150px;
    }

    .hero .container {
        gap: var(--spacing-2xl);
        max-width: 100%;
    }

    .hero-text {
        text-align: center;
    }

    .profile-photo {
        width: 200px;
        height: 200px;
    }

    .hero-cta {
        justify-content: center;
    }
}

/* ============================================
   6. ABOUT SECTION
   ============================================ */

.about {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background-color: var(--background-light);
    position: relative;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    width: 100%;
    display: block;
    animation: fadeInUp 0.8s ease-out;
    opacity: 1;
    animation: fadeInUp 0.8s ease-out forwards;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out;
    letter-spacing: 0.3px;
    opacity: 1 !important;
    transform: none !important;
}

.about-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.info-item {
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s ease-out;
}

.info-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.12);
    border-color: rgba(59, 130, 246, 0.3);
}

.info-label {
    display: block;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-value {
    display: block;
    color: var(--text-dark);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

/* ============================================
   7. EDUCATION SECTION
   ============================================ */

.education {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-secondary-light) 0%, var(--background-tertiary-light) 100%);
}

.education-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.education-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    border-left: 5px solid var(--primary-color);
    animation: fadeInUp 0.8s ease-out;
}

.education-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(59, 130, 246, 0.15),
                0 0 30px rgba(59, 130, 246, 0.1);
    border-left-color: var(--accent-color);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    gap: var(--spacing-lg);
}

.education-header h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    flex: 1;
    font-weight: 800;
    letter-spacing: -0.3px;
}

.education-year {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    white-space: nowrap;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.education-field {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.education-university {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.education-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-light);
}

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

.stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* ============================================
   8. SKILLS SECTION
   ============================================ */

.skills {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-light) 0%, var(--background-secondary-light) 100%);
    position: relative;
}

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

.skill-category {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    animation: fadeInUp 0.8s ease-out;
    transition: all var(--transition-base);
}

.skill-category:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 40px rgba(59, 130, 246, 0.12),
                0 0 30px rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
}

.skill-category-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    letter-spacing: -0.3px;
}

.skill-category-title i {
    font-size: 1.6rem;
}

.skill-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-name {
    font-weight: 700;
    color: var(--text-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    letter-spacing: 0.2px;
}
.skill-bar {
    height: 10px;
    background-color: var(--background-tertiary-light);
    border-radius: 6px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #2563eb);
    border-radius: 6px;
    animation: slideInLeft 1.2s ease-out;
    animation-fill-mode: both;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

/* Stagger animation for skill bars */
.skill-item:nth-child(2) .skill-progress {
    animation-delay: 0.1s;
}

.skill-item:nth-child(3) .skill-progress {
    animation-delay: 0.2s;
}

.skill-item:nth-child(4) .skill-progress {
    animation-delay: 0.3s;
}

/* ============================================
   9. PROJECTS SECTION
   ============================================ */

.projects {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-secondary-light) 0%, var(--background-light) 100%);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.project-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s ease-out;
}

.project-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 20px 60px rgba(59, 130, 246, 0.15),
                0 0 40px rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(240,249,255,0.8));
}

html.dark-mode .project-card:hover {
    background: linear-gradient(135deg, rgba(15,23,42,0.9), rgba(30,41,59,0.85));
}

.project-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color), rgba(59, 130, 246, 0.1));
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(59, 130, 246, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-links {
    display: flex;
    gap: var(--spacing-lg);
}

.project-link {
    width: 50px;
    height: 50px;
    background-color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all var(--transition-base);
    font-size: 1.25rem;
}

.project-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.15);
}

.project-content {
    padding: var(--spacing-2xl);
}

.project-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.3px;
}

.project-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    font-size: 0.95rem;
    letter-spacing: 0.2px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tech-tag {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 700;
    transition: all var(--transition-base);
    letter-spacing: 0.3px;
    cursor: default;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

.tech-tag:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(59, 130, 246, 0.3);
}

.project-date {
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

/* Mobile Projects */
@media (max-width: 768px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   10. ACHIEVEMENTS SECTION
   ============================================ */

.achievements {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-light) 0%, var(--background-secondary-light) 100%);
}

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

.achievement-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s ease-out;
}

.achievement-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(59, 130, 246, 0.15),
                0 0 30px rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}

.achievement-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 2.2rem;
    color: white;
    transition: all var(--transition-base);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.achievement-card:hover .achievement-icon {
    transform: scale(1.2) rotate(10deg);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4);
}

.achievement-card h3 {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.3px;
}

.achievement-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
    font-size: 0.95rem;
}

.achievement-date {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

/* ============================================
   11. CONTACT SECTION
   ============================================ */

.contact {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-secondary-light) 0%, var(--background-light) 50%, #f0f9ff 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    max-width: 1100px;
    margin: 0 auto;
}

/* Contact Info */
.contact-info {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.info-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s ease-out;
}

.info-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(59, 130, 246, 0.15),
                0 0 30px rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
}

.info-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: 1.7rem;
    color: white;
    transition: all var(--transition-base);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.info-card:hover .info-icon {
    transform: scale(1.15);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4);
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.info-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
}

.info-card a {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    transition: all var(--transition-base);
}

.info-card a:hover {
    color: var(--accent-color);
    transform: translateX(5px);
}

/* Contact Form */
.contact-form {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    animation: slideInRight 0.8s ease-out;
}

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

.form-group label {
    display: block;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    letter-spacing: 0.2px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--background-secondary-light);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    color: var(--text-dark);
    transition: all var(--transition-base);
    font-size: 1rem;
    letter-spacing: 0.3px;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: var(--background-light);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.15),
                inset 0 0 0 1px rgba(59, 130, 246, 0.05);
}

.contact-form .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

/* Mobile Contact */
@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   12. FOOTER
   ============================================ */

.footer {
    background: linear-gradient(135deg, var(--text-dark) 0%, #05172e 50%, #0a1929 100%);
    color: white;
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-lg);
}

html.dark-mode .footer {
    background: linear-gradient(135deg, #030712 0%, #0f172a 50%, #1a2f4f 100%);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.footer-section h3 {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.3px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
    letter-spacing: 0.2px;
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: all var(--transition-base);
    font-weight: 500;
}

.footer-section a:hover {
    color: var(--primary-color);
    transform: translateX(4px);
}

.social-links {
    display: flex;
    gap: var(--spacing-lg);
}

.social-links a {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), rgba(255,255,255,0.05));
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.social-links a:hover {
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.35);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    letter-spacing: 0.3px;
}

/* ============================================
   13. SCROLL TO TOP BUTTON
   ============================================ */

.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color), #2563eb);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3),
                0 0 40px rgba(59, 130, 246, 0.15);
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.4),
                0 0 50px rgba(59, 130, 246, 0.2);
}

/* ============================================
   14. ANIMATIONS
   ============================================ */

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    50% {
        transform: translateX(-50%) translateY(-15px);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-30px);
    }
}

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

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
    }
    50% {
        box-shadow: 0 0 35px rgba(59, 130, 246, 0.6);
    }
}

@keyframes slideInUnderline {
    to {
        transform: translateX(-50%) scaleX(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* ============================================
   15. SCROLL ANIMATIONS (Intersection Observer)
   ============================================ */

.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

/* ============================================
   16. RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }

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

@media (max-width: 768px) {
    .section-title {
        font-size: 1.8rem;
    }

    .hero-cta {
        justify-content: center;
    }

    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.95rem;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-container {
        padding: 0 var(--spacing-md);
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-2xl);
    }

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

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

    .hero-cta {
        flex-direction: column;
    }

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

    .info-item {
        padding: var(--spacing-lg);
    }

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

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

    .scroll-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .scroll-to-top,
    .scroll-indicator,
    .hero-cta {
        display: none;
    }

    body {
        background-color: white;
        color: black;
    }

    .project-card,
    .achievement-card,
    .education-card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}