/* ===== CSS Variables ===== */
:root {
    --primary-blue: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --accent-blue: #60a5fa;
    --dark-navy: #1e293b;
    --darker-navy: #0f172a;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-gray: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

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

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    color: var(--dark-navy);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--accent-blue));
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    color: var(--primary-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-blue);
    transition: width 0.3s ease;
}

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

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

.btn-download {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Inter', sans-serif;
}

.btn-download:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
    padding-top: 80px;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.greeting {
    display: block;
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.name {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-badges {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.badge {
    background: white;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-blue);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

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

.btn-primary, .btn-secondary {
    padding: 0.875rem 2rem;
    border-radius: 10px;
    font-weight: 500;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

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

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

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

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

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-left: 2px solid var(--primary-blue);
    border-bottom: 2px solid var(--primary-blue);
    transform: rotate(-45deg);
    margin: 0.5rem auto;
}

/* ===== About Section ===== */
.about {
    padding: 6rem 0;
    background: var(--bg-white);
}

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

.about-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.about-text .lead {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.about-text p {
    margin-bottom: 1rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-light));
    border-radius: 16px;
    color: white;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.95;
    font-weight: 500;
}

/* ===== Experience Timeline ===== */
.experience {
    padding: 6rem 0;
    background: var(--bg-light);
}

.timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-blue), var(--accent-blue));
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-marker {
    position: absolute;
    left: -38px;
    top: 0;
    width: 16px;
    height: 16px;
    background: var(--primary-blue);
    border: 4px solid white;
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg-light);
    transition: var(--transition);
}

.timeline-item:hover .timeline-marker {
    transform: scale(1.3);
    background: var(--primary-dark);
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-xl);
    transform: translateX(5px);
}

.timeline-header h3 {
    font-size: 1.5rem;
    color: var(--dark-navy);
    margin-bottom: 0.5rem;
}

.company {
    display: inline-block;
    font-size: 1.125rem;
    color: var(--primary-blue);
    font-weight: 600;
    margin-right: 1rem;
}

.period {
    display: inline-block;
    color: var(--text-secondary);
    font-weight: 500;
    margin-right: 1rem;
    font-size: 0.95rem;
}

.location {
    display: inline-block;
    color: var(--text-light);
    font-size: 0.9rem;
}

.timeline-highlights {
    margin-top: 1.5rem;
    padding-left: 1.5rem;
}

.timeline-highlights li {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.timeline-highlights li::marker {
    color: var(--primary-blue);
}

/* ===== Skills Section ===== */
.skills {
    padding: 6rem 0;
    background: var(--bg-white);
}

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

.skill-category {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-top: 4px solid var(--primary-blue);
    opacity: 0;
    transform: translateY(30px);
}

.skill-category.visible {
    opacity: 1;
    transform: translateY(0);
}

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

.skill-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.leadership-icon {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.leadership-icon::before {
    content: '👥';
    font-size: 2rem;
}

.security-icon {
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
}

.security-icon::before {
    content: '🔒';
    font-size: 2rem;
}

.tech-icon {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

.tech-icon::before {
    content: '⚙️';
    font-size: 2rem;
}

.data-icon {
    background: linear-gradient(135deg, #10b981, #059669);
}

.data-icon::before {
    content: '📊';
    font-size: 2rem;
}

.skill-category h3 {
    font-size: 1.375rem;
    margin-bottom: 1.25rem;
    color: var(--dark-navy);
}

.skill-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.625rem;
}

.skill-tag {
    background: var(--bg-light);
    color: var(--text-primary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.skill-tag:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
    transform: translateY(-2px);
}

/* ===== Education Section ===== */
.education {
    padding: 6rem 0;
    background: var(--bg-light);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.education-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
    border-top: 4px solid var(--primary-blue);
}

.education-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.cert-badge {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.cissp-badge {
    background: linear-gradient(135deg, #dc2626, #991b1b);
}

.cissp-badge::before {
    content: '🛡️';
}

.university-badge {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
}

.university-badge::before {
    content: '🎓';
}

.education-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--dark-navy);
}

.institution {
    font-size: 1.125rem;
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.edu-period {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 1rem;
}

.description {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ===== Contact Section ===== */
.contact {
    padding: 6rem 0;
    background: var(--bg-white);
}

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

.contact-text {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

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

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-decoration: none;
    display: block;
    border: 2px solid transparent;
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

.email-icon {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.email-icon::before {
    content: '✉️';
}

.phone-icon {
    background: linear-gradient(135deg, #10b981, #059669);
}

.phone-icon::before {
    content: '📱';
}

.linkedin-icon {
    background: linear-gradient(135deg, #0077b5, #005582);
}

.linkedin-icon::before {
    content: '💼';
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--dark-navy);
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-navy);
    color: white;
    text-align: center;
    padding: 2rem 0;
}

.footer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

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

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

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.875rem;
    }

    .btn-download {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .name {
        font-size: 2.5rem;
    }

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

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

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

    .timeline {
        padding-left: 30px;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-marker {
        left: -28px;
    }

    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 640px) {
    .nav-menu {
        display: none;
    }

    .nav-container {
        justify-content: center;
    }

    .name {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .stat-card {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* ===== Utility Classes ===== */
.hidden {
    display: none;
}

.visible {
    opacity: 1 !important;
    transform: translateY(0) !important;
}