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

:root {
    --bg-primary: #f9fafb;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f3f4f6;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-tertiary: #6b7280;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    --blue-800: #1e40af;
    --blue-400: #60a5fa;
    --blue-100: #dbeafe;
    --blue-50: #eff6ff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

body.dark {
    --bg-primary: #111827;
    --bg-secondary: #1f2937;
    --bg-tertiary: #374151;
    --text-primary: #ffffff;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --border-color: #374151;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s, color 0.3s;
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
    z-index: 50;
    transition: all 0.3s;
}

nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

body.dark nav.scrolled {
    background: rgba(31, 41, 55, 0.95);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: color 0.3s;
}

.nav-brand:hover {
    color: var(--blue-600);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    cursor: pointer;
}

.nav-links a:hover {
    color: var(--blue-600);
}

.dark-mode-toggle {
    padding: 0.5rem;
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
    border: 2px solid var(--blue-400);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(37, 99, 235, 0.3);
}

body.dark .dark-mode-toggle {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    border-color: #fcd34d;
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.3);
}

.dark-mode-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: 0 0 30px rgba(37, 99, 235, 0.5);
}

body.dark .dark-mode-toggle:hover {
    box-shadow: 0 0 30px rgba(251, 191, 36, 0.5);
}

.dark-mode-toggle:active {
    transform: scale(0.95) rotate(-15deg);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
}

.mobile-nav {
    display: none;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

.mobile-nav.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.mobile-nav a {
    display: block;
    padding: 0.75rem 0;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.mobile-nav a:hover {
    color: var(--blue-600);
}

/* Hero Section */
.hero {
    padding: 8rem 1.5rem 5rem;
    background: linear-gradient(135deg, var(--blue-600), var(--blue-700), var(--blue-800));
    color: white;
    position: relative;
    overflow: hidden;
}

body.dark .hero {
    background: linear-gradient(135deg, #1e3a8a, #1e40af, #111827);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(to right, rgba(255,255,255,0.1) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 30px 30px;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
}

.profile-image-container {
    position: relative;
    animation: fadeInUp 0.8s ease-out forwards;
}

.profile-glow {
    position: absolute;
    inset: 0;
    background: #60a5fa;
    border-radius: 50%;
    filter: blur(3rem);
    opacity: 0.3;
    animation: pulse 2s infinite;
}

.profile-image {
    position: relative;
    width: 12rem;
    height: 12rem;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-2xl);
    background: #42a5f5;
    display: flex;
    align-items: center;
    justify-content: center;
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-text {
    flex: 1;
    text-align: center;
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
    opacity: 0;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(to right, white, #dbeafe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero h2 {
    font-size: 2rem;
    font-weight: 300;
    color: #dbeafe;
    margin-bottom: 2rem;
}

.hero p {
    font-size: 1.125rem;
    color: #eff6ff;
    margin-bottom: 2rem;
    max-width: 48rem;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.875rem;
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    transition: all 0.3s;
}

.badge:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.05);
}

/* Sections */
section {
    padding: 5rem 1.5rem;
}

section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

.about-text {
    animation: fadeInUp 0.8s ease-out 0.1s forwards;
    opacity: 0;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.focus-card {
    background: linear-gradient(135deg, var(--blue-50), var(--blue-100));
    padding: 2rem;
    border-radius: 1rem;
    border: 2px solid var(--blue-100);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.8s ease-out 0.2s forwards;
    opacity: 0;
    position: relative;
    overflow: hidden;
}

.focus-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--blue-600), var(--blue-400));
    transform: scaleX(0);
    transition: transform 0.3s ease-out;
}

body.dark .focus-card {
    background: linear-gradient(135deg, var(--bg-tertiary), #4b5563);
    border-color: #4b5563;
}

.focus-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
    border-color: var(--blue-400);
}

.focus-card:hover::before {
    transform: scaleX(1);
}

.focus-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.progress-bar-container {
    margin-bottom: 1.5rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.progress-bar-bg {
    width: 100%;
    height: 0.75rem;
    background: var(--border-color);
    border-radius: 9999px;
    overflow: hidden;
}

body.dark .progress-bar-bg {
    background: #4b5563;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(to right, var(--blue-600), var(--blue-700));
    border-radius: 9999px;
    width: 0;
    animation: progressBar 1.5s ease-out forwards;
}

/* Experience Cards */
.experience-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.experience-card {
    background: var(--bg-secondary);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--border-color);
    border-left: 4px solid var(--blue-600);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    position: relative;
    border-radius: 1rem;
}

.experience-card:hover {
    box-shadow: var(--shadow-2xl);
    transform: translateX(8px);
    border-left-color: var(--blue-400);
}

.experience-card:hover::before {
    transform: scaleY(1);
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.experience-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.experience-date {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    background: var(--blue-50);
    padding: 0.25rem 1rem;
    border-radius: 9999px;
}

body.dark .experience-date {
    background: var(--bg-tertiary);
}

.experience-date.current {
    background: linear-gradient(135deg, #fcefa3, #f7d86b);
    font-weight: 600;
}

body.dark .experience-date.current {
    background: linear-gradient(135deg, #fcefa3, #f7d86b);
    color: #3b321f;
}

.experience-company {
    color: var(--blue-600);
    font-weight: 500;
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

body.dark .experience-company {
    color: var(--blue-400);
}

.experience-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.skill-category {
    background: linear-gradient(135deg, var(--bg-tertiary), var(--border-color));
    padding: 2rem;
    border-radius: 1rem;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    position: relative;
    overflow: hidden;
}

.skill-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--blue-600), var(--blue-400), var(--blue-600));
    transform: scaleX(0);
    transition: transform 0.3s ease-out;
}

body.dark .skill-category {
    background: linear-gradient(135deg, var(--bg-tertiary), #4b5563);
    border-color: #4b5563;
}

.skill-category:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
    border-color: var(--blue-400);
}

.skill-category:hover::before {
    transform: scaleX(1);
}

.skill-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--blue-600);
}

.skill-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.skill-name {
    color: var(--text-secondary);
    font-weight: 500;
}

.skill-level {
    color: var(--blue-600);
    font-weight: 600;
}

body.dark .skill-level {
    color: var(--blue-400);
}

/* Certifications */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.cert-card {
    background: var(--bg-secondary);
    padding: 0;
    border-radius: 1rem;
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    position: relative;
    overflow: hidden;
}

.cert-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    background: linear-gradient(to right, var(--blue-600), var(--blue-400));
    transform: scaleX(0);
    transition: transform 0.3s ease-out;
}

.cert-card:hover {
    box-shadow: var(--shadow-2xl);
    transform: translateY(-8px) rotate(1deg);
    border-color: var(--blue-400);
}

.cert-card:hover::before {
    transform: scaleX(1);
}

.cert-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--blue-50), white);
    border-bottom: 2px solid var(--border-color);
}

body.dark .cert-logo {
    background: linear-gradient(135deg, var(--bg-tertiary), #374151);
}

.cert-logo img {
    max-width: 160px;
    max-height: 160px;
    object-fit: contain;
}

.cert-content {
    padding: 1.5rem;
}

.cert-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.cert-card h4 {
    font-weight: 600;
    font-size: 1.125rem;
}

.cert-provider {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.cert-status {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: 600;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
    box-shadow: var(--shadow-sm);
}

.cert-status.in-progress {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
}

body.dark .cert-status.in-progress {
    background: linear-gradient(135deg, #78350f, #92400e);
    color: #fde68a;
}

.cert-status.completed {
    background: linear-gradient(135deg, #d1fae5, #6ee7b7);
    color: #065f46;
}

body.dark .cert-status.completed {
    background: linear-gradient(135deg, #064e3b, #065f46);
    color: #6ee7b7;
}

.cert-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: 0.75rem;
}

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

.award-card {
    background: linear-gradient(135deg, var(--blue-50), white, var(--blue-50));
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 2px solid var(--blue-100);
    box-shadow: var(--shadow-lg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    position: relative;
    overflow: hidden;
}

.award-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(37, 99, 235, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease-out;
}

body.dark .award-card {
    background: linear-gradient(135deg, var(--bg-tertiary), #4b5563, var(--bg-tertiary));
    border-color: #4b5563;
}

.award-card:hover {
    box-shadow: var(--shadow-2xl);
    transform: translateY(-8px) rotate(-2deg);
    border-color: var(--blue-400);
}

.award-card:hover::before {
    opacity: 1;
}

.award-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: bounce 1s infinite;
    transition: all 0.3s ease-out;
}

.award-card:hover .award-icon {
    animation: none;
    transform: scale(1.2);
}

.award-card h4 {
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
}

.award-card p {
    color: var(--text-tertiary);
}

/* Contact Section */
.contact-section {
    background: linear-gradient(135deg, var(--blue-600), var(--blue-800));
    color: white;
    text-align: center;
}

body.dark .contact-section {
    background: linear-gradient(135deg, #1e3a8a, #111827);
}

.contact-section h2 {
    color: white;
}

.contact-section p {
    color: #dbeafe;
    font-size: 1.25rem;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.1s forwards;
    opacity: 0;
}

.contact-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 1rem 1.5rem;
    border-radius: 0.75rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    color: white;
    font-size: 1.125rem;
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), rgba(255, 255, 255, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease-out;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.4);
}

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

.contact-item:hover i {
    transform: rotate(15deg) scale(1.2);
}

.contact-item i {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Footer */
footer {
    background: #111827;
    color: #9ca3af;
    text-align: center;
    padding: 2rem 1.5rem;
}

body.dark footer {
    background: #000000;
}

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

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

@keyframes progressBar {
    from { width: 0; }
    to { width: 63%; }
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.5; }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Responsive */
@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr 1fr;
    }

    .hero-content {
        flex-direction: row;
    }

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

    .hero-badges {
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero h2 {
        font-size: 1.5rem;
    }
}