/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
    /* Fonts */
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Theme Variables - Default Dark Mode */
    --bg-primary: #0f172a;       /* Slate 900 */
    --bg-secondary: #1e293b;     /* Slate 800 Card Background */
    --bg-navbar: rgba(15, 23, 42, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    
    --text-primary: #f8fafc;     /* Slate 50 */
    --text-secondary: #cbd5e1;   /* Slate 300 */
    --text-muted: #64748b;       /* Slate 500 */
    
    --primary: #6366f1;          /* Indigo 500 */
    --primary-hover: #4f46e5;    /* Indigo 600 */
    --primary-rgba: rgba(99, 102, 241, 0.15);
    
    --accent: #14b8a6;           /* Teal 500 */
    --accent-rgba: rgba(20, 184, 166, 0.15);
    
    --success: #10b981;          /* Green for conversions */
    --danger: #ef4444;
    
    --card-shadow: 0 10px 25px -12px rgba(0, 0, 0, 0.3);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.25);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
}

[data-theme="light"] {
    /* Light Mode Variables */
    --bg-primary: #f8fafc;       /* Slate 50 Background */
    --bg-secondary: #ffffff;     /* Pure White Card */
    --bg-navbar: rgba(248, 250, 252, 0.85);
    --border-color: rgba(15, 23, 42, 0.08);
    
    --text-primary: #0f172a;     /* Slate 900 */
    --text-secondary: #475569;   /* Slate 600 */
    --text-muted: #94a3b8;       /* Slate 400 */
    
    --primary: #4f46e5;          /* Indigo 600 */
    --primary-hover: #3730a3;    /* Indigo 800 */
    --primary-rgba: rgba(79, 70, 229, 0.08);
    
    --accent: #0d9488;           /* Teal 600 */
    --accent-rgba: rgba(13, 148, 136, 0.08);
    
    --card-shadow: 0 10px 25px -12px rgba(148, 163, 184, 0.15);
    --glass-shadow: 0 8px 32px 0 rgba(148, 163, 184, 0.1);
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

li {
    list-style: none;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--border-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */
.grid-container {
    display: grid;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 20px;
}

.section-title {
    font-size: 2rem;
    margin-top: 6px;
    text-transform: capitalize;
}

.section-subtitle {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--primary);
}

.divider {
    width: 60px;
    height: 3px;
    background: var(--primary);
    margin: 10px auto 0;
    border-radius: 1.5px;
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background-color: var(--primary);
    color: #0b0f19;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -10px var(--primary-rgba);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}
.btn-icon:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Text Gradient Effect */
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================================================
   NAVBAR (Frosted Glass Effect)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--bg-navbar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--text-primary);
}
.logo .dot {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    gap: 28px;
}

.nav-link {
    font-family: var(--font-heading);
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    font-size: 0.95rem;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}
.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Language and Theme Switch Icons Display Control */
html[lang="vi"] .lang-vi, 
html[lang="en"] .lang-en {
    display: inline-block;
}
html[lang="vi"] .lang-en, 
html[lang="en"] .lang-vi {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: none;
}
[data-theme="dark"] .sun-icon {
    display: inline-block;
}
[data-theme="light"] .moon-icon {
    display: inline-block;
}
[data-theme="light"] .sun-icon {
    display: none;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

/* Mobile Nav Menu Drawer */
.mobile-nav {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: var(--bg-primary);
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    z-index: 999;
    transition: 0.4s ease;
    border-top: 1px solid var(--border-color);
}
.mobile-nav.open {
    left: 0;
}
.mobile-link {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 600;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
    padding: 95px 0 35px;
    position: relative;
    overflow: hidden;
}

.hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 24px;
    align-items: center;
}

.welcome-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--primary-rgba);
    color: var(--primary);
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 14px;
}

.hero-title {
    font-size: 2.8rem;
    line-height: 1.1;
    margin-bottom: 10px;
}

.hero-subtitle {
    font-size: 1.7rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 600;
    min-height: 40px; /* Prevent layout shifting */
}
.cursor {
    color: var(--primary);
    animation: blink 0.8s infinite;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 20px;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.social-links {
    display: flex;
    gap: 16px;
}
.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.2rem;
}
.social-links a:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 5px 15px var(--primary-rgba);
}

/* Profile Picture Design */
.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
}
.avatar-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
    border-radius: 24px;
    padding: 12px;
    border: 1px dashed var(--border-color);
}
.avatar-ring {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 24px;
    border: 2px solid transparent;
    border-top-color: var(--primary);
    border-bottom-color: var(--accent);
    animation: borderPulse 4s ease-in-out infinite alternate;
}
.profile-img {
    width: 100%;
    height: 100%;
    border-radius: 16px;
    object-fit: cover;
    background-color: var(--bg-secondary);
    border: 4px solid var(--bg-secondary);
}

@keyframes borderPulse {
    0% {
        transform: scale(0.98);
        opacity: 0.8;
    }
    100% {
        transform: scale(1.02);
        opacity: 1;
        box-shadow: 0 0 20px var(--primary-rgba);
    }
}

/* Stats Board */
.stats-container {
    max-width: 1200px;
    margin: 20px auto 0;
    padding: 0 24px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 14px;
}
.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--border-radius-md);
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.stat-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary-rgba);
    box-shadow: 0 10px 20px -10px var(--primary-rgba);
}
.stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 4px;
}
.stat-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
}

/* ==========================================================================
   ABOUT SECTION
   ========================================================================== */
.about-section {
    padding: 40px 0;
}
.about-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 24px;
    align-items: start;
}
.about-lead {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 14px;
}
.about-content p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.info-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}
.info-icon {
    font-size: 1.1rem;
    color: var(--primary);
    background-color: var(--primary-rgba);
    padding: 10px;
    border-radius: var(--border-radius-sm);
}
.info-title {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    letter-spacing: 0.05em;
}
.info-value {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}
.info-value a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}
.info-value a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* About - Career Direction Card */
.about-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
}
.card-heading {
    font-size: 1.3rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.card-heading i {
    color: var(--accent);
}

.timeline-small {
    position: relative;
    border-left: 2px solid var(--border-color);
    padding-left: 20px;
}
.timeline-small-item {
    position: relative;
    margin-bottom: 20px;
}
.timeline-small-item:last-child {
    margin-bottom: 0;
}
.timeline-small-marker {
    position: absolute;
    left: -29px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    border: 3px solid var(--accent);
}
.timeline-small-content h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}
.timeline-small-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ==========================================================================
   SKILLS SECTION (Progress Bars)
   ========================================================================== */
.skills-section {
    padding: 40px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.skills-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.skill-category-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.skill-category-card:hover {
    border-color: var(--primary-rgba);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}
.category-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
    background-color: var(--primary-rgba);
    color: var(--primary);
    font-size: 1.1rem;
}
.category-header h3 {
    font-size: 1.15rem;
}

.skill-badges-container {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.skill-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition);
}
.skill-badge i {
    color: var(--primary);
    font-size: 0.9rem;
    width: auto;
    text-align: left;
}
.skill-badge:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--primary-rgba);
}

/* Brand Custom Colors for certs */
.meta-color { color: #0080ff; }
.google-color { color: #4285f4; }
.analytics-color { color: #f4b400; }
.hubspot-color { color: #ff7a59; }

/* ==========================================================================
   EXPERIENCE SECTION (Vertical Timeline)
   ========================================================================== */
.experience-section {
    padding: 40px 0;
}
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 20px;
}
.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    width: 2px;
    height: 100%;
    background-color: var(--border-color);
}
.timeline-item {
    position: relative;
    margin-bottom: 32px;
    padding-left: 28px;
}
.timeline-item:last-child {
    margin-bottom: 0;
}
.timeline-dot {
    position: absolute;
    left: -9px;
    top: 8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: var(--bg-primary);
    border: 4px solid var(--primary);
    z-index: 2;
    transition: var(--transition);
}
.timeline-item:hover .timeline-dot {
    background-color: var(--primary);
    box-shadow: 0 0 12px var(--primary);
    transform: scale(1.2);
}

.timeline-date {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    font-size: 1.1rem;
}
.timeline-content {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 22px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.timeline-content:hover {
    transform: translateY(-3px);
    border-color: var(--primary-rgba);
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}
.job-title {
    font-size: 1.25rem;
    color: var(--text-primary);
}
.job-company {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 2px;
}
.job-company i {
    color: var(--primary);
    margin-right: 6px;
}
.job-badge {
    background-color: var(--primary-rgba);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 50px;
}

.job-details {
    display: flex;
    flex-direction: column;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.job-details > li {
    position: relative;
    padding-left: 18px;
}
.job-details > li::before {
    content: '→';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary);
    font-weight: 700;
}
.job-details ul {
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-left: 18px;
}
.job-details ul li {
    list-style-type: disc;
}
.job-details strong {
    color: var(--accent);
}

/* ==========================================================================
   EDUCATION & CERTIFICATIONS
   ========================================================================== */
.education-section {
    padding: 40px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}
.education-grid {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 24px;
    align-items: start;
}
.block-title {
    font-size: 1.35rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.block-title i {
    color: var(--primary);
}

.edu-card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: var(--border-radius-md);
    margin-bottom: 16px;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.edu-card:hover {
    border-color: var(--primary-rgba);
}
.edu-year {
    display: inline-block;
    color: var(--primary);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 8px;
}
.edu-degree {
    font-size: 1.15rem;
    margin-bottom: 6px;
}
.edu-school {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 8px;
}
.edu-gpa {
    color: var(--accent);
    font-size: 0.9rem;
    font-weight: 700;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 16px;
}
.cert-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 16px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.cert-card:hover {
    transform: translateX(4px);
    border-color: var(--primary-rgba);
}
.cert-brand-icon {
    font-size: 1.8rem;
    width: 36px;
    text-align: center;
}
.cert-name {
    font-size: 0.95rem;
    font-weight: 700;
}
.cert-org {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 2px;
}

/* ==========================================================================
   PROJECTS SECTION
   ========================================================================== */
.projects-section {
    padding: 40px 0;
}
.projects-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}
.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-rgba);
    box-shadow: 0 10px 20px -10px var(--primary-rgba);
}

.project-img-wrapper {
    position: relative;
    height: 200px;
    overflow: hidden;
}
.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.project-card:hover .project-img {
    transform: scale(1.1);
}
.project-overlay {
    position: absolute;
    top: 16px;
    left: 16px;
}
.project-tag {
    background-color: var(--bg-primary);
    color: var(--primary);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 4px 12px;
    border-radius: 50px;
    border: 1px solid var(--border-color);
}

.project-content {
    padding: 20px;
}
.project-name {
    font-size: 1.15rem;
    margin-bottom: 8px;
}
.project-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 14px;
    line-height: 1.5;
}
.project-metrics {
    display: flex;
    gap: 12px;
    border-top: 1px solid var(--border-color);
    padding-top: 14px;
}
.metric-item {
    font-size: 0.85rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}
.metric-item i {
    color: var(--accent);
}

/* ==========================================================================
   CONTACT SECTION
   ========================================================================== */
.contact-section {
    padding: 40px 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}
.contact-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}
.contact-info-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
}
.contact-info-center h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.contact-info-center p {
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 30px;
    line-height: 1.5;
}
.contact-methods-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    width: 100%;
}
.method-card-link {
    display: block;
    width: 100%;
    text-align: left;
}
.method-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 16px 20px;
    border-radius: var(--border-radius-md);
    transition: var(--transition);
    height: 100%;
}
.method-card-link:hover .method-card {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px -10px var(--primary-rgba);
}
.method-card i {
    font-size: 1.3rem;
    color: var(--primary);
    background-color: var(--primary-rgba);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.method-card span {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    display: block;
    margin-bottom: 2px;
}
.method-card p {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0;
    color: var(--text-primary);
    word-break: break-all;
}

/* Contact Form Styling */
.contact-form-block {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--card-shadow);
}
.form-group-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}
.form-group label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.form-group input, .form-group textarea {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-rgba);
}
.btn-block {
    width: 100%;
}

.form-alert {
    padding: 16px;
    border-radius: var(--border-radius-sm);
    margin-top: 20px;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
}
.form-alert.success {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border: 1px solid var(--success);
}
.form-alert.error {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--danger);
    border: 1px solid var(--danger);
}
.hidden {
    display: none;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-primary);
    padding: 40px 0;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.back-to-top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
}
.back-to-top:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-3px);
}

/* ==========================================================================
   KEYFRAME ANIMATIONS & TRANSITIONS
   ========================================================================== */
@keyframes blink {
    50% { opacity: 0; }
}
@keyframes rotate {
    100% { transform: rotate(360deg); }
}

/* Scroll reveal initial states */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.scroll-reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Hero animations on load */
.animate-left {
    opacity: 0;
    transform: translateX(-50px);
    animation: slideIn 0.8s forwards 0.2s;
}
.animate-right {
    opacity: 0;
    transform: translateX(50px);
    animation: slideIn 0.8s forwards 0.2s;
}
.animate-bottom {
    opacity: 0;
    transform: translateY(50px);
    animation: slideIn 0.8s forwards 0.4s;
}

@keyframes slideIn {
    to {
        opacity: 1;
        transform: translate(0);
    }
}

/* ==========================================================================
   RESPONSIVE DESIGN BREAKPOINTS
   ========================================================================== */
@media (max-width: 1024px) {
    .hero-grid, .about-grid, .education-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-visual {
        order: -1;
    }
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 8px 16px;
    }
    .mobile-nav {
        top: 54px;
        height: calc(100vh - 54px);
    }
    .nav-menu {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1.4rem;
    }
    .section-title {
        font-size: 1.7rem;
    }
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    .skills-grid {
        grid-template-columns: 1fr;
    }
    .projects-grid {
        grid-template-columns: 1fr;
    }
    .info-grid {
        grid-template-columns: 1fr;
    }
    .contact-methods-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .avatar-wrapper {
        width: 270px;
        height: 270px;
        padding: 8px;
    }
    .profile-img {
        border-radius: 12px;
    }
    .hero-title {
        font-size: 1.8rem;
    }
    .hero-subtitle {
        font-size: 1.15rem;
    }
    .section-title {
        font-size: 1.5rem;
    }
    .stats-container {
        grid-template-columns: 1fr;
        padding: 16px;
        gap: 12px;
    }
    .stat-card {
        padding: 12px;
    }
    .nav-actions {
        gap: 8px;
    }
    #download-cv span {
        display: none !important;
    }
    #download-cv {
        padding: 8px 10px;
    }
}

/* ==========================================================================
   PRINT STYLES: OPTIMIZED FOR A4 PDF EXPORT
   ========================================================================== */
@media print {
    /* Hide non-resume interactive elements */
    .navbar, 
    .nav-actions,
    .mobile-nav, 
    .welcome-badge, 
    .hero-cta,
    .social-links, 
    .avatar-ring, 
    .back-to-top, 
    .contact-form-block,
    .footer, 
    .divider,
    .section-subtitle {
        display: none !important;
    }

    /* Reset global page styles for white paper */
    body {
        background-color: #ffffff !important;
        color: #0b0f19 !important;
        font-size: 9.5pt !important;
        line-height: 1.4 !important;
    }

    /* Set A4 margins */
    @page {
        size: A4;
        margin: 1.2cm 1.5cm;
    }

    .main-content {
        margin: 0 !important;
        padding: 0 !important;
    }

    /* Print layout grid adjustment */
    section {
        padding: 0 !important;
        margin-bottom: 22px !important;
        background-color: transparent !important;
        border: none !important;
        page-break-inside: avoid;
    }

    /* Hero Print Styling */
    .hero-section {
        padding: 0 !important;
        margin-bottom: 25px !important;
        border-bottom: 2px solid #0b0f19 !important;
        padding-bottom: 15px !important;
    }
    .hero-grid {
        display: grid !important;
        grid-template-columns: 3.5fr 1fr !important;
        gap: 20px !important;
    }
    .hero-title {
        font-size: 22pt !important;
        margin-bottom: 4px !important;
        color: #0b0f19 !important;
    }
    .hero-title span {
        background: none !important;
        -webkit-text-fill-color: initial !important;
        color: #0b0f19 !important;
    }
    .hero-subtitle {
        font-size: 13pt !important;
        margin-bottom: 8px !important;
        color: #475569 !important;
        min-height: auto !important;
    }
    .hero-desc {
        font-size: 9.5pt !important;
        margin-bottom: 0 !important;
        color: #334155 !important;
    }
    .avatar-wrapper {
        width: 100px !important;
        height: 100px !important;
        padding: 0 !important;
        border: none !important;
        margin-left: auto;
        border-radius: 6px !important;
    }
    .profile-img {
        width: 100px !important;
        height: 100px !important;
        border: 2px solid #e2e8f0 !important;
        filter: grayscale(1) !important;
        border-radius: 6px !important;
    }

    /* Hide Stats counter in print */
    .stats-container {
        display: none !important;
    }

    /* Print Section Title styling */
    .section-header {
        text-align: left !important;
        margin-bottom: 10px !important;
    }
    .section-title {
        font-size: 13pt !important;
        text-transform: uppercase !important;
        border-bottom: 1.5px solid #0b0f19 !important;
        padding-bottom: 4px !important;
        margin-top: 0 !important;
        color: #0b0f19 !important;
    }

    /* About section print */
    .about-grid {
        display: block !important;
    }
    .about-lead {
        display: none;
    }
    .about-content p {
        margin-bottom: 12px !important;
    }
    .info-grid {
        display: grid !important;
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 10px !important;
    }
    .info-icon {
        display: none !important;
    }
    .info-title {
        font-size: 7.5pt !important;
    }
    .info-value {
        font-size: 9pt !important;
    }
    .about-card {
        display: none !important; /* Hide career summary timeline in print to fit A4 */
    }

    /* Skills print - 2 Columns list instead of cards */
    .skills-grid {
        display: grid !important;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 15px !important;
    }
    .skill-category-card {
        background-color: transparent !important;
        padding: 0 !important;
        border: none !important;
        box-shadow: none !important;
    }
    .category-header {
        margin-bottom: 10px !important;
    }
    .category-icon-wrapper {
        display: none !important;
    }
    .category-header h3 {
        font-size: 10.5pt !important;
        font-weight: 700 !important;
    }
    .skill-badges-container {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 6px !important;
    }
    .skill-badge {
        background-color: transparent !important;
        border: none !important;
        padding: 0 !important;
        font-size: 8.5pt !important;
        color: #0b0f19 !important;
        font-weight: 500 !important;
    }
    .skill-badge i {
        display: none !important;
    }
    .skill-badge::after {
        content: ", ";
    }
    .skill-badge:last-child::after {
        content: "";
    }

    /* Timeline Print Styling */
    .timeline {
        padding-left: 0 !important;
    }
    .timeline::before {
        display: none !important;
    }
    .timeline-item {
        padding-left: 0 !important;
        margin-bottom: 15px !important;
        page-break-inside: avoid;
    }
    .timeline-dot {
        display: none !important;
    }
    .timeline-date {
        font-size: 9.5pt !important;
        font-weight: 700 !important;
        margin-bottom: 4px !important;
        color: #475569 !important;
    }
    .timeline-content {
        background-color: transparent !important;
        border: none !important;
        padding: 0 !important;
        box-shadow: none !important;
    }
    .job-header {
        border: none !important;
        padding-bottom: 4px !important;
        margin-bottom: 6px !important;
    }
    .job-title {
        font-size: 11pt !important;
        font-weight: 700 !important;
    }
    .job-company {
        font-size: 9.5pt !important;
        color: #0b0f19 !important;
        font-weight: 600 !important;
    }
    .job-company i {
        display: none !important;
    }
    .job-badge {
        display: none !important;
    }
    .job-details {
        gap: 4px !important;
    }
    .job-details > li {
        padding-left: 12px !important;
        font-size: 9pt !important;
    }
    .job-details > li::before {
        content: "•" !important;
        font-size: 11pt !important;
        top: -1px !important;
    }
    .job-details ul {
        margin-top: 4px !important;
        gap: 2px !important;
        padding-left: 15px !important;
    }
    .job-details strong {
        color: #0b0f19 !important;
        font-weight: 700 !important;
    }

    /* Education Print Styling */
    .education-grid {
        display: grid !important;
        grid-template-columns: 1fr 1.2fr !important;
        gap: 30px !important;
    }
    .edu-card {
        background-color: transparent !important;
        padding: 0 !important;
        border: none !important;
        box-shadow: none !important;
        margin-bottom: 12px !important;
    }
    .edu-degree {
        font-size: 10pt !important;
        font-weight: 700 !important;
    }
    .edu-school {
        font-size: 9pt !important;
        margin-bottom: 2px !important;
    }
    .edu-gpa {
        font-size: 8.5pt !important;
        color: #475569 !important;
    }
    .cert-grid {
        gap: 8px !important;
    }
    .cert-card {
        background-color: transparent !important;
        padding: 0 !important;
        border: none !important;
        box-shadow: none !important;
        gap: 8px !important;
    }
    .cert-brand-icon {
        display: none !important; /* Hide brand icons in print */
    }
    .cert-name {
        font-size: 9.5pt !important;
    }
    .cert-org {
        font-size: 8.5pt !important;
        margin-top: 1px !important;
    }

    /* Hide projects section in print to keep it within 2 pages */
    .projects-section {
        display: none !important;
    }
    
    .contact-section {
        background-color: transparent !important;
        border: none !important;
    }
    .contact-container {
        display: block !important;
    }
    .contact-info-center h3 {
        font-size: 11pt !important;
        text-align: left !important;
        margin-bottom: 8px !important;
    }
    .contact-info-center p {
        display: none !important;
    }
    .contact-methods-grid {
        display: flex !important;
        flex-direction: row !important;
        gap: 20px !important;
    }
    .method-card-link {
        text-decoration: none !important;
    }
    .method-card {
        background-color: transparent !important;
        border: none !important;
        padding: 0 !important;
    }
    .method-card i {
        display: none !important;
    }
    .method-card span {
        font-size: 7.5pt !important;
    }
    .method-card p {
        font-size: 9pt !important;
        color: #0b0f19 !important;
    }
}