/* ==================== CSS VARIABLES ==================== */
:root {
    /* Colors - Dark Theme */
    --primary-color: #e6e6e6;
    --secondary-color: #b3b3b3;
    --accent-color: #f2f2f2;
    --gradient-1: linear-gradient(135deg, #f2f2f2 0%, #8c8c8c 100%);
    --gradient-2: linear-gradient(135deg, #f2f2f2 0%, #b3b3b3 46%, #737373 100%);
    --gradient-3: linear-gradient(to right, #f2f2f2, #8c8c8c);
    
    --bg-primary: #0b0b0b;
    --bg-secondary: #141414;
    --bg-tertiary: #1f1f1f;
    --bg-card: rgba(31, 31, 31, 0.7);
    
    --text-primary: #f5f5f5;
    --text-secondary: #cfcfcf;
    --text-muted: #9a9a9a;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 30px rgba(255, 255, 255, 0.08);
    
    /* Typography */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* Light Theme Variables */
body.light-theme {
    --bg-primary: #f0f0f0;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e6e6e6;
    --bg-card: rgba(255, 255, 255, 0.9);
    
    --text-primary: #0f0f0f;
    --text-secondary: #2b2b2b;
    --text-muted: #5c5c5c;
    
    --border-color: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.15);
}

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

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

body {
    font-family: var(--font-secondary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    line-height: 1.2;
}

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

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

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-fast);
}

ul {
    list-style: none;
}

/* ==================== UTILITIES ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.gradient-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    text-align: center;
    margin-bottom: 1rem;
    font-size: clamp(2rem, 4vw, 3rem);
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
    font-size: 1.1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.8rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-2);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--primary-color);
}

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

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

.btn-outline:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
}

.btn-link {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-link:hover {
    gap: 0.8rem;
}

/* ==================== THEME TOGGLE ==================== */
.theme-toggle {
    position: fixed;
    top: 100px;
    right: 2rem;
    z-index: 1000;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-2);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(20deg);
    box-shadow: var(--shadow-glow);
}

/* ==================== NAVIGATION ==================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(32, 32, 32, 0.95);
    backdrop-filter: blur(10px);
    z-index: 999;
    padding: 1rem 0;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.light-theme .navbar {
    background: rgba(230, 230, 230, 0.95);
}

.navbar.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    transition: color var(--transition-fast);
}

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

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

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-normal);
}

/* ==================== HERO SECTION ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 8rem 0 4rem;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(65, 88, 208, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(200, 80, 192, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-tagline {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    min-height: 2.5rem;
    font-weight: 600;
}

.typewriter {
    border-right: 2px solid var(--primary-color);
    animation: blink 0.7s step-end infinite;
}

@keyframes blink {
    50% { border-color: transparent; }
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.hero-social {
    display: flex;
    gap: 1rem;
}

.hero-social a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1.3rem;
    transition: all var(--transition-normal);
}

.hero-social a:hover {
    background: var(--gradient-2);
    color: white;
    transform: translateY(-5px);
}

.hero-image {
    position: relative;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    position: absolute;
    padding: 1.5rem 2rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    top: 10%;
    left: 0;
    animation-delay: 0s;
}

.floating-card:nth-child(2) {
    top: 50%;
    right: 0;
    animation-delay: 1s;
}

.floating-card:nth-child(3) {
    bottom: 10%;
    left: 20%;
    animation-delay: 2s;
}

.floating-card i {
    font-size: 2rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.scroll-indicator span {
    width: 3px;
    height: 15px;
    background: var(--primary-color);
    border-radius: 3px;
    animation: scroll 1.5s ease-in-out infinite;
}

.scroll-indicator span:nth-child(2) { animation-delay: 0.2s; }
.scroll-indicator span:nth-child(3) { animation-delay: 0.4s; }

@keyframes scroll {
    0%, 100% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== ABOUT SECTION ==================== */
.about {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-intro {
    font-size: 1.2rem !important;
    color: var(--text-primary);
}

.mission-box {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin: 2rem 0;
    display: flex;
    gap: 1.5rem;
}

.mission-box i {
    font-size: 3rem;
    color: var(--primary-color);
}

.mission-box h3 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

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

.stat-card {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary-color);
}

.stat-card i {
    font-size: 2.5rem;
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.stat-card h4 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.stat-card p {
    color: var(--text-muted);
    margin: 0;
}

/* ==================== SKILLS SECTION ==================== */
.skills {
    padding: var(--spacing-xl) 0;
}

.skill-category {
    margin-bottom: 4rem;
}

.skill-category-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.skill-category-title i {
    color: var(--primary-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.skill-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.skill-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1rem;
    background: var(--gradient-2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.skill-card h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.skill-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-2);
    border-radius: 10px;
    width: 0;
    transition: width 1s ease;
}

.skill-rating {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.learning-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 2px dashed var(--primary-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.learning-card:hover {
    background: var(--bg-tertiary);
    transform: translateY(-5px);
}

.learning-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.learning-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.learning-card p {
    color: var(--text-muted);
    margin: 0;
}

.soft-skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.soft-skill-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-normal);
}

.soft-skill-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.soft-skill-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.soft-skill-card h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.soft-skill-card p {
    color: var(--text-secondary);
    margin: 0;
}

/* ==================== PROJECTS SECTION ==================== */
.projects {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.project-featured {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-xl);
    padding: 3rem;
    margin-bottom: 4rem;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.project-badge {
    position: absolute;
    top: -15px;
    right: 3rem;
    background: var(--gradient-2);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.project-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.project-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-visual {
    width: 200px;
    height: 200px;
    background: var(--gradient-2);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: white;
}

.project-title {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.project-impact {
    background: rgba(65, 88, 208, 0.1);
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: var(--radius-sm);
}

.project-impact i {
    color: var(--primary-color);
    margin-right: 0.5rem;
}

.project-description {
    margin-bottom: 1.5rem;
}

.project-tech-stack h4,
.project-methodology h4,
.project-challenges h4 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.tech-tags span {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-methodology ul {
    list-style: none;
    padding-left: 0;
}

.project-methodology li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
}

.project-methodology li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.project-results {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin: 2rem 0;
}

.result-metric {
    background: var(--bg-tertiary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.result-metric i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.project-challenges {
    background: rgba(200, 80, 192, 0.1);
    border-left: 4px solid var(--secondary-color);
    padding: 1rem;
    margin: 1.5rem 0;
    border-radius: var(--radius-sm);
}

.project-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 2rem;
}

/* Project Cards Grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.project-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.project-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
}

.project-card h3 {
    color: var(--text-primary);
    flex: 1;
}

.project-card-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.project-highlights {
    margin: 1rem 0;
}

.project-highlights h4 {
    color: var(--text-primary);
    margin-bottom: 0.8rem;
    font-size: 1rem;
}

.project-highlights ul {
    list-style: none;
    padding-left: 0;
}

.project-highlights li {
    padding: 0.3rem 0;
    padding-left: 1.2rem;
    position: relative;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.project-highlights li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.tech-tags-small {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1rem;
}

.tech-tags-small span {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
}

.project-card-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.projects-cta {
    text-align: center;
    margin-top: 3rem;
}

/* ==================== EDUCATION SECTION ==================== */
.education {
    padding: var(--spacing-xl) 0;
}

.education-timeline {
    max-width: 900px;
    margin: 0 auto 4rem;
}

.timeline-item {
    display: flex;
    gap: 2rem;
    position: relative;
}

.timeline-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    flex-shrink: 0;
}

.timeline-content {
    flex: 1;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.timeline-date {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.timeline-gpa {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.coursework {
    margin-top: 1.5rem;
}

.coursework h5 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.course-tags span {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.academic-highlights {
    margin-top: 1.5rem;
}

.academic-highlights ul {
    list-style: none;
    padding-left: 0;
}

.academic-highlights li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
}

.academic-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.certifications {
    max-width: 1000px;
    margin: 0 auto;
}

.subsection-title {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.cert-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.cert-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.cert-card h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.cert-card p {
    color: var(--text-muted);
    margin: 0;
}

/* ==================== ACHIEVEMENTS SECTION ==================== */
.achievements {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.achievement-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-normal);
}

.achievement-card.highlight {
    border: 2px solid var(--primary-color);
}

.achievement-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.achievement-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
    margin-bottom: 1.5rem;
}

.achievement-card h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.achievement-card h4 {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.achievement-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.achievement-details {
    list-style: none;
    padding-left: 0;
}

.achievement-details li {
    padding: 0.3rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.achievement-details li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.achievement-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-top: 1rem;
}

.achievement-link:hover {
    gap: 0.8rem;
}

/* ==================== CONTACT SECTION ==================== */
.contact {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    max-width: 1100px;
    margin: 0 auto;
}

.contact-info h3,
.contact-form-container h3 {
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.contact-item i {
    font-size: 2rem;
    color: var(--primary-color);
}

.contact-item h4 {
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.contact-item a {
    color: var(--text-secondary);
}

.contact-item a:hover {
    color: var(--primary-color);
}

.resume-download {
    margin-top: 2rem;
}

.contact-form-container {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-family: var(--font-secondary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(65, 88, 208, 0.1);
}

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

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-tertiary);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-normal);
}

.footer-social a:hover {
    background: var(--gradient-2);
    color: white;
    transform: translateY(-3px);
}

.footer-links h4 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.footer-note {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==================== BACK TO TOP ==================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-2);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 998;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

/* ==================== RESPONSIVE DESIGN ==================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-image {
        height: 400px;
    }
    
    .project-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 250px;
        height: calc(100vh - 70px);
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: right var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .hamburger {
        display: flex;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    .skills-grid,
    .learning-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .theme-toggle {
        top: 80px;
        right: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .project-featured {
        padding: 2rem 1.5rem;
    }
    
    .tech-tags {
        gap: 0.5rem;
    }
    
    .tech-tags span {
        font-size: 0.8rem;
        padding: 0.4rem 0.8rem;
    }
    
    .achievement-card {
        padding: 1.5rem;
    }
    
    .cert-grid,
    .achievements-grid,
    .soft-skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 0 2rem;
    }
    
    .hero-image {
        height: 300px;
    }
    
    .floating-card {
        padding: 1rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .floating-card i {
        font-size: 1.5rem;
    }
    
    .project-featured {
        padding: 1.5rem;
    }
    
    .timeline-item {
        flex-direction: column;
    }
    
    .hero-social {
        justify-content: center;
    }
    
    .hero-social a {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .project-visual {
        width: 150px;
        height: 150px;
        font-size: 4rem;
    }
    
    .result-metric {
        width: 100%;
        justify-content: center;
    }
    
    .project-links {
        flex-direction: column;
    }
    
    .project-links .btn {
        width: 100%;
        justify-content: center;
    }
    
    .contact-item {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        text-align: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 1.5rem;
        right: 1.5rem;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}