/* =============================================
   TAMER FAHMY - PERSONAL WEBPAGE STYLES
   ============================================= */

/* CSS Variables */
:root {
    --primary-color: #0668E1;
    --primary-dark: #0553B9;
    --secondary-color: #1877F2;
    --accent-color: #00D4AA;
    --dark-bg: #0a0a0a;
    --darker-bg: #050505;
    --card-bg: #111111;
    --card-hover: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --gradient-primary: linear-gradient(135deg, #0668E1 0%, #00D4AA 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #050505 100%);
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(6, 104, 225, 0.3);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base Styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Skip Link for Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    z-index: 10000;
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 8px 0;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

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

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

/* =============================================
   NAVIGATION
   ============================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-menu a:hover {
    color: var(--text-primary);
}

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

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

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    padding: 6rem 2rem 2rem;
    background: var(--gradient-dark);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(6, 104, 225, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(0, 212, 170, 0.1) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    width: 100%;
    gap: 4rem;
    z-index: 1;
}

.hero-text {
    flex: 1;
}

.greeting {
    color: var(--accent-color);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.name {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.title {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(6, 104, 225, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(6, 104, 225, 0.6);
    color: white;
}

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(6, 104, 225, 0.1);
    color: var(--text-primary);
}

/* Hero Visual */
.hero-visual {
    flex: 0 0 auto;
}

.profile-image-container {
    position: relative;
}

.profile-placeholder {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-glow);
    position: relative;
}

.profile-placeholder::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: var(--gradient-primary);
    z-index: -1;
    opacity: 0.5;
    filter: blur(20px);
}

.profile-placeholder i {
    font-size: 6rem;
    color: rgba(255, 255, 255, 0.9);
}

.profile-image {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
    box-shadow: var(--shadow-glow);
    border: 4px solid rgba(6, 104, 225, 0.5);
    transition: all var(--transition-normal);
}

.profile-image:hover {
    transform: scale(1.05);
    border-color: var(--accent-color);
    box-shadow: 0 0 80px rgba(0, 212, 170, 0.4);
}

.profile-image-container {
    position: relative;
}

.profile-image-container::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: var(--gradient-primary);
    z-index: -1;
    opacity: 0.5;
    filter: blur(20px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
    color: var(--text-muted);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* =============================================
   SECTION STYLES
   ============================================= */
section {
    padding: 6rem 0;
}

.section-header-row {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    margin-bottom: 1rem;
    width: 100%;
}

.section-header-row .section-title {
    margin-bottom: 0;
}

.section-header-row .section-title::after {
    margin: 1rem auto 0;
}

.section-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(6, 104, 225, 0.15);
    border: 1px solid rgba(6, 104, 225, 0.3);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    color: var(--primary-color);
    z-index: 10;
}

.section-toggle:hover {
    background: rgba(6, 104, 225, 0.25);
    border-color: var(--primary-color);
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 0 15px rgba(6, 104, 225, 0.3);
}

.section-toggle i {
    font-size: 1rem;
    transition: transform var(--transition-normal);
}

.section-toggle.collapsed i {
    transform: rotate(180deg);
}

.section-content {
    transition: all 0.4s ease;
    overflow: hidden;
    max-height: 5000px;
    opacity: 1;
}

.section-content.collapsed {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-top: 0;
}

.collapsible-section .section-subtitle {
    transition: all 0.3s ease;
}

.collapsible-section.collapsed .section-subtitle {
    opacity: 0;
    max-height: 0;
    margin: 0;
    overflow: hidden;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 4rem;
    font-size: 1.1rem;
}

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

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text .lead {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

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

.about-text strong {
    color: var(--primary-color);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition-normal);
}

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

.stat-card i {
    font-size: 2rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
}

.stat-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.stat-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* =============================================
   AI TRANSFORMATION SECTION
   ============================================= */
.ai-transformation {
    background: var(--dark-bg);
    position: relative;
}

.ai-transformation::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(6, 104, 225, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.ai-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.ai-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.ai-card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(6, 104, 225, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.ai-card-icon i {
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ai-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.ai-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* =============================================
   PUBLICATIONS SECTION
   ============================================= */
.publications {
    background: var(--darker-bg);
}

.publications-list {
    max-width: 900px;
    margin: 0 auto;
}

.publication-card {
    display: flex;
    gap: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: all var(--transition-normal);
}

.publication-card:hover {
    border-color: var(--primary-color);
    transform: translateX(8px);
}

.pub-icon {
    flex: 0 0 60px;
    height: 60px;
    border-radius: 12px;
    background: rgba(6, 104, 225, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.pub-content {
    flex: 1;
}

.pub-type {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pub-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.pub-meta {
    display: flex;
    gap: 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.pub-meta i {
    margin-right: 0.5rem;
}

.pub-abstract {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.publications-note {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
    background: rgba(6, 104, 225, 0.1);
    border-radius: 8px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.publications-note p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

/* =============================================
   CONTACT SECTION
   ============================================= */
.contact {
    background: var(--dark-bg);
    position: relative;
}

.contact::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50%;
    background: linear-gradient(to top, var(--darker-bg), transparent);
    pointer-events: none;
}

.contact-content {
    position: relative;
    z-index: 1;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
}

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

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

.contact-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.contact-card a,
.contact-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

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

.contact-card-link {
    display: block;
    text-decoration: none;
    cursor: pointer;
}

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

.contact-card-link h3 {
    color: var(--text-primary);
}

.contact-card-link span {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-card-link:hover span {
    color: var(--accent-color);
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
}

.footer-social a:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.footer-social a i {
    font-size: 1.2rem;
    pointer-events: none;
}

/* =============================================
   RESPONSIVE STYLES
   ============================================= */
@media (max-width: 1024px) {
    .ai-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    /* Navigation */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--darker-bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right var(--transition-normal);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu a {
        font-size: 1.2rem;
    }
    
    .hamburger {
        display: flex;
        z-index: 1001;
    }
    
    .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(5px, -5px);
    }
    
    /* Hero */
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
    }
    
    .hero-text {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .tagline {
        text-align: center;
    }
    
    .profile-placeholder {
        width: 200px;
        height: 200px;
    }
    
    .profile-placeholder i {
        font-size: 4rem;
    }
    
    .profile-image {
        width: 200px;
        height: 200px;
    }
    
    /* About */
    .about-content {
        grid-template-columns: 1fr;
    }
    
    /* AI Grid */
    .ai-grid {
        grid-template-columns: 1fr;
    }
    
    /* Publications */
    .publication-card {
        flex-direction: column;
        text-align: center;
    }
    
    .pub-icon {
        margin: 0 auto;
    }
    
    .pub-meta {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    /* Contact */
    .contact-info {
        grid-template-columns: 1fr;
    }
    
    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero {
        padding: 5rem 1rem 2rem;
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        justify-content: center;
        width: 100%;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    section {
        padding: 4rem 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

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

.hero-text,
.hero-visual {
    animation: fadeInUp 0.8s ease forwards;
}

.hero-visual {
    animation-delay: 0.2s;
}

/* =============================================
   SKILLS SECTION (in About)
   ============================================= */
.skills-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.skills-section h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

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

.skill-tag {
    display: inline-block;
    background: rgba(6, 104, 225, 0.15);
    color: var(--primary-color);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    border: 1px solid rgba(6, 104, 225, 0.3);
    transition: all var(--transition-normal);
}

.skill-tag:hover {
    background: rgba(6, 104, 225, 0.25);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* =============================================
   EDUCATION SECTION
   ============================================= */
.education {
    background: var(--dark-bg);
    position: relative;
}

.education::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(0, 212, 170, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.education-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    display: flex;
    gap: 1.5rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.education-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
    transform: scaleY(0);
    transition: transform var(--transition-normal);
}

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

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

.edu-icon {
    flex: 0 0 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(0, 212, 170, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.edu-icon i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.edu-content {
    flex: 1;
}

.edu-degree {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.edu-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.edu-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.edu-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.edu-meta i {
    margin-right: 0.5rem;
}

.edu-grade {
    color: var(--accent-color);
    font-weight: 500;
}

.edu-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

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

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.cert-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
}

.cert-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.cert-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.cert-card:hover::after {
    width: 60%;
}

.cert-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(6, 104, 225, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.cert-icon i {
    font-size: 1.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cert-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.cert-issuer {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.cert-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.cert-meta span {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.cert-skills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

/* =============================================
   VOLUNTEERING SECTION
   ============================================= */
.volunteering {
    background: var(--dark-bg);
    position: relative;
}

.volunteering::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 70% 30%, rgba(6, 104, 225, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.volunteer-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.volunteer-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.volunteer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

.volunteer-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.volunteer-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
}

.volunteer-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(0, 212, 170, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

.volunteer-icon i {
    font-size: 1.25rem;
    color: var(--accent-color);
}

.volunteer-duration {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.volunteer-duration span:first-child {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.duration-badge {
    background: rgba(0, 212, 170, 0.15);
    color: var(--accent-color);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
}

.volunteer-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.volunteer-org {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.volunteer-cause {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.volunteer-cause i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

.volunteer-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* =============================================
   PUBLICATION LINK STYLE
   ============================================= */
.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.pub-link:hover {
    color: var(--accent-color);
    transform: translateX(5px);
}

.pub-link i {
    font-size: 0.8rem;
}

.publication-card.featured {
    border-color: rgba(6, 104, 225, 0.3);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(6, 104, 225, 0.05) 100%);
}

.publication-card.upcoming {
    border-color: rgba(0, 212, 170, 0.3);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(0, 212, 170, 0.05) 100%);
}

.pub-type-upcoming {
    background: linear-gradient(135deg, #00D4AA 0%, #00A080 100%) !important;
}

.pub-status {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: rgba(0, 212, 170, 0.1);
    border-radius: 8px;
    color: var(--accent-color);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pub-book-title {
    color: var(--primary-color);
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.pub-book-title i {
    margin-right: 0.5rem;
}

.pub-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.pub-tag {
    background: rgba(6, 104, 225, 0.15);
    color: var(--primary-color);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
}

/* =============================================
   ARTICLES SECTION
   ============================================= */
.articles {
    background: var(--dark-bg);
    position: relative;
}

.articles::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(6, 104, 225, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.article-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.article-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.article-image {
    height: 160px;
    background: linear-gradient(135deg, rgba(6, 104, 225, 0.2) 0%, rgba(0, 212, 170, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-image i {
    font-size: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.article-content {
    padding: 1.5rem;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.article-category {
    background: rgba(6, 104, 225, 0.15);
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    text-transform: uppercase;
}

.article-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.article-date i {
    margin-right: 0.35rem;
}

.article-content h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.article-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    line-height: 1.6;
}

.article-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.article-link:hover {
    color: var(--accent-color);
    gap: 0.75rem;
}

.article-link i {
    font-size: 0.8rem;
    transition: transform var(--transition-normal);
}

.article-link:hover i {
    transform: translateX(3px);
}

/* Responsive styles for Articles */
@media (max-width: 1024px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* =============================================
   RESPONSIVE STYLES FOR NEW SECTIONS
   ============================================= */
@media (max-width: 1024px) {
    .education-grid,
    .volunteer-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .cert-grid {
        grid-template-columns: 1fr;
    }
    
    .education-card {
        flex-direction: column;
        text-align: center;
    }
    
    .edu-icon {
        margin: 0 auto;
    }
    
    .edu-meta {
        justify-content: center;
    }
    
    .edu-skills {
        justify-content: center;
    }
    
    .volunteer-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .volunteer-duration {
        align-items: center;
        margin-top: 1rem;
    }
    
    .volunteer-card {
        text-align: center;
    }
    
    .skills-tags {
        justify-content: center;
    }
}

/* =============================================
   LEADERSHIP PHILOSOPHY SECTION
   ============================================= */

/* =============================================
   CAREER JOURNEY SECTION
   ============================================= */
.career-journey {
    background: var(--dark-bg);
    position: relative;
}

.career-journey::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 10% 30%, rgba(6, 104, 225, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 90% 70%, rgba(0, 212, 170, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding-left: 60px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--accent-color) 50%, var(--primary-color) 100%);
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -60px;
    top: 0;
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: all var(--transition-normal);
}

.timeline-marker i {
    font-size: 1.25rem;
    color: var(--primary-color);
}

.timeline-item.current .timeline-marker {
    background: var(--gradient-primary);
    border-color: var(--accent-color);
    box-shadow: 0 0 20px rgba(6, 104, 225, 0.5);
}

.timeline-item.current .timeline-marker i {
    color: white;
}

.timeline-item.orange-expert .timeline-marker {
    border-color: #FF6600;
}

.timeline-item.orange-expert .timeline-marker i {
    color: #FF6600;
}

.timeline-item.mobinil .timeline-marker {
    border-color: #E30613;
}

.timeline-item.mobinil .timeline-marker i {
    color: #E30613;
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    transition: all var(--transition-normal);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -12px;
    top: 18px;
    width: 0;
    height: 0;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    border-right: 12px solid var(--border-color);
}

.timeline-content::after {
    content: '';
    position: absolute;
    left: -10px;
    top: 19px;
    width: 0;
    height: 0;
    border-top: 11px solid transparent;
    border-bottom: 11px solid transparent;
    border-right: 11px solid var(--card-bg);
}

.timeline-item:hover .timeline-content {
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.timeline-item.current .timeline-content {
    border-color: rgba(6, 104, 225, 0.3);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(6, 104, 225, 0.05) 100%);
}

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

.timeline-title h3 {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.timeline-title .company {
    display: inline-block;
    background: rgba(6, 104, 225, 0.15);
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    margin-right: 0.5rem;
}

.timeline-item.orange-expert .timeline-title .company {
    background: rgba(255, 102, 0, 0.15);
    color: #FF6600;
}

.timeline-item.mobinil .timeline-title .company {
    background: rgba(227, 6, 19, 0.15);
    color: #E30613;
}

.badge-expert {
    display: inline-block;
    background: linear-gradient(135deg, #FF6600 0%, #FF9900 100%);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.65rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-date {
    background: var(--gradient-primary);
    color: white;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    white-space: nowrap;
}

.timeline-summary {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.timeline-achievements {
    margin-top: 1.5rem;
}

.achievement-category {
    margin-bottom: 1.5rem;
}

.achievement-category:last-child {
    margin-bottom: 0;
}

.achievement-category h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.achievement-category h4 i {
    color: var(--primary-color);
}

.achievement-category ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.achievement-category li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.achievement-category li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5rem;
    width: 6px;
    height: 6px;
    background: var(--accent-color);
    border-radius: 50%;
}

.achievement-category li strong {
    color: var(--primary-color);
}

.achievement-category li:last-child {
    margin-bottom: 0;
}

/* Responsive styles for Career Journey */
@media (max-width: 768px) {
    .timeline {
        padding-left: 40px;
    }
    
    .timeline::before {
        left: 14px;
    }
    
    .timeline-marker {
        left: -40px;
        width: 40px;
        height: 40px;
    }
    
    .timeline-marker i {
        font-size: 1rem;
    }
    
    .timeline-header {
        flex-direction: column;
    }
    
    .timeline-date {
        align-self: flex-start;
    }
    
    .timeline-title h3 {
        font-size: 1.15rem;
    }
    
    .timeline-content {
        padding: 1.5rem;
    }
    
    .timeline-content::before,
    .timeline-content::after {
        display: none;
    }
}

@media (max-width: 480px) {
    .timeline {
        padding-left: 30px;
    }
    
    .timeline::before {
        left: 10px;
    }
    
    .timeline-marker {
        left: -30px;
        width: 32px;
        height: 32px;
    }
    
    .timeline-marker i {
        font-size: 0.85rem;
    }
}

/* =============================================
   LEADERSHIP PHILOSOPHY SECTION (continued)
   ============================================= */
.leadership {
    background: var(--darker-bg);
    position: relative;
    overflow: hidden;
}

.leadership::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(6, 104, 225, 0.1) 0%, transparent 40%),
        radial-gradient(ellipse at 80% 80%, rgba(0, 212, 170, 0.08) 0%, transparent 40%);
    pointer-events: none;
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.philosophy-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.philosophy-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.philosophy-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.philosophy-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.philosophy-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.3;
    line-height: 1;
}

.philosophy-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(6, 104, 225, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
}

.philosophy-icon i {
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.philosophy-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.philosophy-quote {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.6;
    border-left: 3px solid var(--accent-color);
    padding-left: 1rem;
}

.philosophy-author {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1rem;
}

.philosophy-graphic {
    margin: 1.5rem 0;
    border-radius: 12px;
    overflow: hidden;
    background: #ffffff;
    padding: 1rem;
}

.philosophy-graphic img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.philosophy-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.philosophy-concepts {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.concept-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.concept-item i {
    width: 24px;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.philosophy-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.philosophy-tags span {
    background: rgba(0, 212, 170, 0.15);
    color: var(--accent-color);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
}

.impact-formula {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(6, 104, 225, 0.1);
    border-radius: 12px;
}

.formula-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.formula-item i {
    color: var(--primary-color);
}

.formula-operator {
    color: var(--accent-color);
    font-weight: 700;
    font-size: 1rem;
}

.servant-leadership-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(0, 212, 170, 0.1);
    border-radius: 12px;
}

.servant-leadership-grid span {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    background: rgba(0, 212, 170, 0.15);
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
}

.servant-leadership-grid span i {
    color: var(--accent-color);
    font-size: 0.75rem;
}

/* Make the 5th card span full width */
.philosophy-card:nth-child(5) {
    grid-column: 1 / -1;
}

/* Responsive styles for Leadership Philosophy */
@media (max-width: 1024px) {
    .philosophy-grid {
        grid-template-columns: 1fr;
    }
    
    .philosophy-card:nth-child(5) {
        grid-column: auto;
    }
}

@media (max-width: 768px) {
    .philosophy-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .philosophy-number {
        font-size: 2rem;
    }
    
    .impact-formula {
        justify-content: center;
    }
    
    .servant-leadership-grid {
        justify-content: center;
    }
}