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

:root {
    /* Color Palette */
    --primary-color: #BE1E2D;
    --primary-hover: #D32C3C;
    --background-color: #F7F9FB;
    --text-color: #1F2937;
    --text-muted: #6B7280;
    --accent-blue: #C7E0F4;
    --white: #FFFFFF;
    --border-color: #E5E7EB;
    --shadow-light: 0 4px 12px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 15px 35px rgba(0, 0, 0, 0.15);
    
    /* Typography */
    --font-family: 'Poppins', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

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

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

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-muted);
}

.highlight {
    color: var(--primary-color);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-xl);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    gap: var(--spacing-xs);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(247, 249, 251, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

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

.nav-logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

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

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    text-decoration: none;
    position: relative;
    transition: color var(--transition-fast);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle .bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* ===== PRELOADER ===== */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loader {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== HERO SECTION ===== */
.hero {
    padding: calc(80px + var(--spacing-4xl)) 0 var(--spacing-4xl);
    background: linear-gradient(135deg, var(--background-color) 0%, var(--accent-blue) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    color: var(--text-muted);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

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

.profile-img {
    width: 400px;
    height: 400px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: var(--shadow-heavy);
    border: 8px solid var(--white);
    transition: transform var(--transition-slow);
}

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

/* ===== SECTION STYLES ===== */
section {
    padding: var(--spacing-4xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== ABOUT SECTION ===== */
.about {
    background-color: var(--white);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
    text-align: left;
}

/* ===== SKILLS SECTION ===== */
.skills {
    background-color: var(--background-color);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.skill-card {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform var(--transition-normal);
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

.skill-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.tag {
    background-color: var(--background-color);
    color: var(--text-color);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===== EXPERIENCE SECTION ===== */
.experience {
    background-color: var(--white);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 12px;
    height: 12px;
    background-color: var(--primary-color);
    border-radius: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-content {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    margin: 0 var(--spacing-2xl);
    position: relative;
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}

.timeline-company {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.timeline-description {
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== PROJECTS SECTION ===== */
.projects-preview {
    background-color: var(--background-color);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.project-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.project-image {
    height: 200px;
    overflow: hidden;
}

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

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

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

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.project-description {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

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

.tech-tag {
    background-color: var(--accent-blue);
    color: var(--text-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.projects-cta {
    text-align: center;
}

/* ===== CERTIFICATIONS SECTION ===== */
.certifications {
    background-color: var(--white);
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.cert-card {
    background-color: var(--background-color);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    text-align: center;
    transition: transform var(--transition-normal);
    border: 2px solid transparent;
}

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

.cert-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-2xl);
    color: var(--white);
}

.cert-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.cert-description {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ===== EDUCATION SECTION ===== */
.education {
    background-color: var(--background-color);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.education-card {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform var(--transition-normal);
}

.education-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.education-icon {
    width: 60px;
    height: 60px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
}

.education-degree {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.education-school {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.education-achievement {
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== CONTACT CTA SECTION ===== */
.contact-cta {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--white);
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

.cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    color: rgba(255, 255, 255, 0.9);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--text-color);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.footer-title {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xs);
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* ===== PAGE HEADER ===== */
.page-header {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--background-color) 0%, var(--accent-blue) 100%);
    text-align: center;
}

.page-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== ABOUT PAGE STYLES ===== */
.about-hero {
    background-color: var(--white);
    padding: var(--spacing-4xl) 0;
}

.about-hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.hero-profile-img {
    width: 400px;
    height: 400px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-heavy);
    border: 8px solid var(--white);
}

.about-hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.about-hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.about-hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.about-hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== MY STORY SECTION ===== */
.my-story {
    background-color: var(--background-color);
}

.story-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.story-text {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    line-height: 1.7;
}

.story-text p {
    margin-bottom: var(--spacing-lg);
}

.story-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.highlight-item {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    text-align: center;
}

.highlight-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: var(--font-size-xl);
    color: var(--white);
}

.highlight-item h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.highlight-item p {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* ===== SKILLS DETAILED SECTION ===== */
.skills-detailed {
    background-color: var(--white);
}

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

.skill-category {
    background-color: var(--background-color);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.skill-category-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    color: var(--white);
    flex-shrink: 0;
}

.skill-category-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0;
}

.skill-item {
    margin-bottom: var(--spacing-lg);
}

.skill-name {
    display: block;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.skill-bar {
    height: 8px;
    background-color: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border-radius: 4px;
    width: 0;
    transition: width 2s ease;
}

/* ===== EXPERIENCE DETAILED SECTION ===== */
.experience-detailed {
    background-color: var(--background-color);
}

.timeline-detailed {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.timeline-detailed::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item-detailed {
    display: flex;
    margin-bottom: var(--spacing-3xl);
    position: relative;
}

.timeline-marker {
    width: 12px;
    height: 12px;
    background-color: var(--primary-color);
    border-radius: 50%;
    position: absolute;
    left: 24px;
    top: 0;
    z-index: 1;
}

.timeline-content-detailed {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    margin-left: var(--spacing-3xl);
    flex: 1;
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.timeline-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}

.timeline-company {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.timeline-description {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.timeline-achievements {
    list-style: none;
    padding: 0;
}

.timeline-achievements li {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-lg);
}

.timeline-achievements li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== CERTIFICATIONS DETAILED SECTION ===== */
.certifications-detailed {
    background-color: var(--white);
}

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

.cert-detailed-card {
    background-color: var(--background-color);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-normal);
}

.cert-detailed-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.cert-detailed-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
    color: var(--white);
}

.cert-detailed-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-color);
}

.cert-detailed-subtitle {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.cert-detailed-description {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.cert-detailed-date {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===== EDUCATION DETAILED SECTION ===== */
.education-detailed {
    background-color: var(--background-color);
}

.education-detailed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-xl);
}

.education-detailed-card {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-normal);
}

.education-detailed-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.education-detailed-icon {
    width: 60px;
    height: 60px;
    background-color: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
    color: var(--primary-color);
}

.education-detailed-degree {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.education-detailed-school {
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.education-detailed-achievement {
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.education-detailed-description {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.education-detailed-date {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===== CTA SECTION ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: var(--white);
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

.cta-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== PROJECTS PAGE STYLES ===== */
.projects-filter {
    background-color: var(--white);
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border-color);
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    background-color: transparent;
    color: var(--text-color);
    border: 2px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-normal);
}

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

.projects-showcase {
    background-color: var(--background-color);
    padding: var(--spacing-4xl) 0;
}

.projects-grid-detailed {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-2xl);
}

.project-card-detailed {
    background-color: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-normal);
}

.project-card-detailed:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.project-image-detailed {
    height: 250px;
    overflow: hidden;
    position: relative;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(190, 30, 45, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

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

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

.project-link {
    width: 50px;
    height: 50px;
    background-color: var(--white);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all var(--transition-normal);
}

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

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

.project-title-detailed {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.project-description-detailed {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

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

.tech-tag-detailed {
    background-color: var(--accent-blue);
    color: var(--text-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.project-features {
    margin-bottom: var(--spacing-xl);
}

.project-features h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}

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

.project-features li {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.project-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== PROJECT STATS ===== */
.project-stats {
    background-color: var(--white);
    padding: var(--spacing-3xl) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-xl);
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== TESTIMONIALS ===== */
.testimonials {
    background-color: var(--background-color);
    padding: var(--spacing-4xl) 0;
}

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

.testimonial-card {
    background-color: var(--white);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-normal);
}

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

.testimonial-content {
    margin-bottom: var(--spacing-xl);
}

.testimonial-text {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    line-height: 1.6;
    font-style: italic;
    position: relative;
}

.testimonial-text::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: -10px;
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    font-weight: 700;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.author-info {
    flex: 1;
}

.author-name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.author-title {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ===== CONTACT PAGE STYLES ===== */
.contact-hero {
    background-color: var(--white);
    padding: var(--spacing-4xl) 0;
}

.contact-hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.contact-hero-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-color);
}

.contact-hero-description {
    font-size: var(--font-size-lg);
    color: var(--text-muted);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.contact-hero-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background-color: var(--background-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    color: var(--white);
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.contact-details p {
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.contact-profile-img {
    width: 300px;
    height: 300px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-heavy);
    border: 8px solid var(--white);
}

/* ===== CONTACT FORM SECTION ===== */
.contact-form-section {
    background-color: var(--background-color);
    padding: var(--spacing-4xl) 0;
}

.contact-form-container {
    max-width: 800px;
    margin: 0 auto;
}

.contact-form {
    background-color: var(--white);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

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

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
    background-color: var(--white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

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

.form-error {
    display: block;
    color: var(--primary-color);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    min-height: 20px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.privacy-link {
    color: var(--primary-color);
    text-decoration: none;
}

.privacy-link:hover {
    text-decoration: underline;
}

.form-submit {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.btn-loading {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-success {
    background-color: var(--white);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    text-align: center;
}

.success-icon {
    width: 80px;
    height: 80px;
    background-color: #10B981;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-xl);
    font-size: var(--font-size-3xl);
    color: var(--white);
}

.success-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.success-description {
    color: var(--text-muted);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xl);
}

/* ===== CONTACT SERVICES SECTION ===== */
.contact-services {
    background-color: var(--white);
    padding: var(--spacing-4xl) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.service-card {
    background-color: var(--background-color);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    transition: transform var(--transition-normal);
    text-align: center;
}

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

.service-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    font-size: var(--font-size-xl);
    color: var(--white);
}

.service-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.service-description {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.service-features {
    list-style: none;
    padding: 0;
    text-align: left;
}

.service-features li {
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
    position: relative;
    padding-left: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 600;
}

/* ===== FAQ SECTION ===== */
.contact-faq {
    background-color: var(--background-color);
    padding: var(--spacing-4xl) 0;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-light);
    margin-bottom: var(--spacing-lg);
    overflow: hidden;
}

.faq-question {
    padding: var(--spacing-xl);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--background-color);
}

.faq-question h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0;
}

.faq-icon {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 var(--spacing-xl) var(--spacing-xl);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-answer p {
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 0;
}

/* ===== ICON STYLES ===== */
.icon-code::before { content: '💻'; }
.icon-design::before { content: '🎨'; }
.icon-management::before { content: '📊'; }
.icon-soft::before { content: '🤝'; }
.icon-microsoft::before { content: '🔷'; }
.icon-wordpress::before { content: 'W'; }
.icon-pm::before { content: '📋'; }
.icon-office::before { content: '📄'; }
.icon-university::before { content: '🎓'; }
.icon-college::before { content: '🏫'; }
.icon-leadership::before { content: '👑'; }
.icon-innovation::before { content: '💡'; }
.icon-email::before { content: '✉️'; }
.icon-phone::before { content: '📱'; }
.icon-location::before { content: '📍'; }
.icon-external::before { content: '🔗'; }
.icon-github::before { content: '🐙'; }
.icon-ecommerce::before { content: '🛒'; }
.icon-arrow-up::before { content: '↑'; }
.icon-check::before { content: '✓'; }
.icon-spinner::before { content: '⟳'; }

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .hero-content,
    .about-hero-content,
    .contact-hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        text-align: center;
    }
    
    .story-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item::before {
        left: 24px;
    }
    
    .timeline-content {
        margin-left: var(--spacing-3xl);
        margin-right: 0;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: rgba(247, 249, 251, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-4xl);
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .profile-img {
        width: 300px;
        height: 300px;
    }
    
    .hero-profile-img,
    .contact-profile-img {
        width: 250px;
        height: 250px;
    }
    
    .hero-buttons,
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .filter-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .projects-grid,
    .projects-grid-detailed {
        grid-template-columns: 1fr;
    }
    
    .about-hero-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }
    
    section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-xl);
    }
    
    .profile-img {
        width: 250px;
        height: 250px;
    }
    
    .hero-profile-img,
    .contact-profile-img {
        width: 200px;
        height: 200px;
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-sm);
    }
    
    .btn-large {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
    
    .contact-form {
        padding: var(--spacing-xl);
    }
    
    .skill-card,
    .cert-card,
    .education-card {
        padding: var(--spacing-xl);
    }
}

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

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.fade-in-left {
    animation: fadeInLeft 0.6s ease forwards;
}

.fade-in-right {
    animation: fadeInRight 0.6s ease forwards;
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.w-100 { width: 100%; }
.h-100 { height: 100%; }

.visible { opacity: 1; visibility: visible; }
.hidden { opacity: 0; visibility: hidden; }