/* ========================================
   COLOR VARIABLES - Professional Palette
   ======================================== */
:root {
    --color-primary: #2c3e50;      /* Dark blue-gray */
    --color-secondary: #34495e;    /* Medium blue-gray */
    --color-accent: #3498db;       /* Professional blue */
    --color-accent-dark: #2980b9;  /* Darker blue */
    --color-accent-2: #9b59b6;     /* Purple */
    --color-accent-3: #e74c3c;     /* Red */
    --color-accent-4: #27ae60;     /* Green */
    --color-accent-5: #f39c12;     /* Orange */
    --color-bg-light: #f8f9fa;     /* Light gray */
    --color-bg-white: #ffffff;      /* White */
    --color-bg-section-1: #f5f7fa; /* Very light blue-gray */
    --color-bg-section-2: #ffffff;  /* White */
    --color-bg-section-3: #f0f4f8; /* Light blue-gray */
    --color-bg-section-4: #ffffff;  /* White */
    --color-bg-section-5: #f5f7fa;  /* Very light blue-gray */
    --color-text-dark: #1a1a1a;    /* Dark text */
    --color-text-medium: #555;     /* Medium gray text */
    --color-text-light: #999;      /* Light gray text */
    --color-border: #e0e0e0;      /* Light border */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-bg-light);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Scroll Progress Indicator */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    z-index: 10000;
    transition: width 0.1s ease;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* ========================================
   SECTION 1: HERO
   ======================================== */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-section-1) 0%, var(--color-bg-white) 100%);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

/* Animated background pattern */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(52, 152, 219, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(155, 89, 182, 0.05) 0%, transparent 50%);
    animation: background-shift 20s ease infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes background-shift {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(-20px, -20px) scale(1.1);
    }
}

.hero-content {
    text-align: center;
    z-index: 1;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-name {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    letter-spacing: 0.2em;
    margin-bottom: 40px;
    text-transform: uppercase;
    position: relative;
    display: inline-block;
    color: var(--color-accent-dark);
    text-shadow: 0 2px 8px rgba(52, 152, 219, 0.2);
    transition: var(--transition-smooth);
    filter: drop-shadow(0 4px 12px rgba(52, 152, 219, 0.15));
}

.hero-name::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: name-glow 3s ease-in-out infinite;
}

@keyframes name-glow {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.hero-name::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: name-glow 3s ease-in-out infinite;
}

@keyframes name-glow {
    0%, 100% {
        opacity: 0.5;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.hero-name .hero-name-letter {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 4s ease infinite;
    color: var(--color-accent-dark);
}

/* Fallback - ensure text is always visible */
.hero-name,
.hero-name .hero-name-letter {
    color: var(--color-accent-dark);
}

.hero-name::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    border-radius: 2px;
    transition: width 0.6s ease;
}

.hero-name:hover {
    letter-spacing: 0.25em;
    transform: scale(1.02);
    filter: drop-shadow(0 4px 8px rgba(52, 152, 219, 0.25));
}

.hero-name:hover::after {
    width: 80%;
}

@keyframes gradient-shift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.hero-name-letter {
    display: inline-block;
    animation: letter-pop 0.6s ease both;
}

@keyframes letter-pop {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.8) rotateX(90deg);
    }
    50% {
        transform: translateY(-8px) scale(1.15) rotateX(0deg);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1) rotateX(0deg);
    }
}

.hero-main-content {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

.hero-image-wrapper {
    flex-shrink: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-image-link {
    display: inline-block;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
    text-decoration: none;
}

.hero-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--color-accent);
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.2);
    transition: var(--transition-smooth);
    display: block;
}

.hero-image-link:hover .hero-image {
    transform: scale(1.05);
    box-shadow: 0 12px 32px rgba(52, 152, 219, 0.3);
    border-color: var(--color-accent-2);
}

.hero-image-link::after {
    content: 'LinkedIn';
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--color-accent);
    opacity: 0;
    transition: var(--transition-smooth);
    font-weight: 600;
    letter-spacing: 0.1em;
}

.hero-image-link:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-5px);
}

.hero-info {
    flex: 1;
    text-align: left;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero-title {
    font-size: clamp(1.2rem, 3vw, 2rem);
    font-weight: 400;
    letter-spacing: 0.3em;
    margin-bottom: 30px;
    color: #666;
    text-transform: uppercase;
    text-align: left;
}

.hero-title-link {
    color: #666;
    text-decoration: none;
    transition: var(--transition-smooth);
    display: inline-block;
}

.hero-title-link:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
    text-shadow: 0 2px 8px rgba(52, 152, 219, 0.2);
}

.hero-contact {
    margin-bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
}

.hero-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: #555;
    letter-spacing: 0.05em;
}

.hero-contact-icon {
    font-size: 1.3em;
    display: inline-block;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
    transition: var(--transition-smooth);
}

.hero-contact-item:nth-child(1) .hero-contact-icon {
    filter: drop-shadow(0 2px 4px rgba(139, 69, 19, 0.3));
}

.hero-contact-item:nth-child(2) .hero-contact-icon {
    filter: drop-shadow(0 2px 4px rgba(52, 152, 219, 0.3));
}

.hero-contact-item:nth-child(3) .hero-contact-icon {
    filter: drop-shadow(0 2px 4px rgba(231, 76, 60, 0.3));
}

.hero-contact-item:nth-child(4) .hero-contact-icon {
    filter: drop-shadow(0 2px 4px rgba(155, 89, 182, 0.3));
}

.hero-contact-item:hover .hero-contact-icon {
    transform: scale(1.15);
}

.hero-contact-text {
    font-weight: 300;
    color: var(--color-text-medium);
}

.hero-contact-item.clickable {
    cursor: pointer;
    transition: var(--transition-smooth);
}

.hero-contact-item.clickable:hover {
    transform: translateX(5px);
}

.hero-contact-item.clickable:hover .hero-contact-text,
.hero-contact-item.clickable:hover .hero-contact-icon {
    color: var(--color-accent);
}

.hero-contact-link {
    color: var(--color-text-medium);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.hero-contact-link:hover {
    color: var(--color-accent);
    text-decoration: underline;
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 400;
    color: #666;
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.hero-location {
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: #999;
    letter-spacing: 0.1em;
}

/* ========================================
   SECTION 2: QUALIFICATIONS
   ======================================== */
.qualifications {
    min-height: auto;
    padding: 80px 0;
    background-color: var(--color-bg-section-2);
    display: flex;
    align-items: center;
    transition: var(--transition-smooth);
}

.qualifications.active {
    background-color: #e8f4f8;
}

.qualifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 60px;
    margin-top: 40px;
}

.qual-group {
    opacity: 0;
    transform: translateY(30px);
    transition: var(--transition-smooth);
}

.qual-group:hover {
    transform: translateY(-5px);
}

.qual-category {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--color-accent-dark);
    letter-spacing: 0.05em;
    position: relative;
    padding-left: 20px;
}

.qual-category::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    border-radius: 2px;
}

.qual-list {
    list-style: none;
}

.qual-list li {
    font-size: 1.1rem;
    line-height: 2.2;
    color: #555;
    padding-left: 20px;
    position: relative;
    display: block;
    transition: var(--transition-smooth);
    cursor: default;
    width: fit-content;
}

.qual-list li:hover {
    transform: scale(1.15);
    color: var(--color-accent-dark);
    font-weight: 600;
    padding-left: 25px;
}

.qual-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.1em;
    transition: var(--transition-smooth);
}

.qual-list li:hover::before {
    transform: scale(1.3);
    color: var(--color-accent-2);
}

/* ========================================
   SECTION 3: TOOLS & TECHNOLOGY
   ======================================== */
.tools {
    min-height: auto;
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-bg-section-3) 0%, var(--color-bg-white) 100%);
    transition: var(--transition-smooth);
}

.tools.active {
    background: linear-gradient(180deg, #dde8f0 0%, #e8f0f5 100%);
}

.tool-category {
    margin-bottom: 60px;
}

.tool-category-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--color-accent-dark);
    letter-spacing: 0.05em;
    opacity: 0;
    display: inline-block;
    padding: 8px 20px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(155, 89, 182, 0.1) 100%);
    border-left: 4px solid var(--color-accent);
    border-radius: 4px;
}

.tool-items {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    row-gap: 45px;
}

.tool-item {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--color-bg-white) 0%, #f8f9fa 100%);
    border: 2px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-medium);
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(10px);
    position: relative;
    overflow: visible;
    cursor: pointer;
    margin: 10px;
}

.tool-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s;
    z-index: 1;
}

.tool-item:hover::before {
    left: 100%;
}

.tool-item[data-tooltip] {
    position: relative;
}

/* Tooltip for tool items */
.tool-item[data-tooltip-text] {
    position: relative;
}

.tooltip-container {
    position: absolute;
    bottom: calc(100% + 20px);
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    padding: 0;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 400;
    z-index: 1000;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    opacity: 0;
    pointer-events: none;
    max-width: 400px;
    min-width: 200px;
    width: auto;
    transition: opacity 0.3s ease, transform 0.3s ease;
    overflow: hidden;
    margin-bottom: 10px;
}

.tooltip-container.active {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.tooltip-image {
    width: 100%;
    max-height: 250px;
    height: auto;
    object-fit: contain;
    display: block;
    background: rgba(255, 255, 255, 0.05);
}

.tooltip-content {
    padding: 15px 18px;
    text-align: left;
    line-height: 1.6;
}

.tooltip-arrow {
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid var(--color-secondary);
}

.tool-item[data-tooltip-text]:hover {
    z-index: 1001;
}

.tool-item:hover {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    color: var(--color-accent-dark);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
    z-index: 1;
    position: relative;
}

/* ========================================
   SECTION 4: TIMELINE
   ======================================== */
.timeline {
    min-height: auto;
    padding: 80px 0;
    background-color: var(--color-bg-section-4);
    transition: var(--transition-smooth);
    position: relative;
}

.timeline.active {
    background-color: #f0f7fa;
}

.timeline-item {
    margin-bottom: 150px;
    opacity: 0;
    will-change: transform, opacity;
    transform-origin: center center;
}

.timeline-item:last-child {
    margin-bottom: 60px;
}

.timeline-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 50px;
    background-color: var(--color-bg-white);
    border-left: 3px solid var(--color-accent);
    padding-left: 50px;
    position: relative;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    z-index: 1;
}

.timeline-content::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.02) 0%, rgba(155, 89, 182, 0.02) 100%);
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 0;
}

.timeline-item:hover .timeline-content::after {
    opacity: 1;
}

.timeline-item:hover .timeline-content {
    box-shadow: 0 8px 30px rgba(52, 152, 219, 0.15);
    transform: translateY(-2px);
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 0;
    width: 13px;
    height: 13px;
    background-color: var(--color-accent);
    border-radius: 50%;
    transform: translateY(0);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.timeline-period {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-accent-dark);
    letter-spacing: 0.15em;
    margin-bottom: 20px;
    text-transform: uppercase;
    display: inline-block;
    padding: 10px 24px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 2px solid var(--color-accent);
    border-radius: 6px;
    position: relative;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.15);
    transition: var(--transition-smooth);
}

.timeline-period:hover {
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.25);
    transform: translateY(-1px);
}

.timeline-period::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-top: 6px solid transparent;
    border-bottom: 6px solid transparent;
    border-right: 8px solid var(--color-accent);
}

.timeline-company {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--color-accent-dark);
    letter-spacing: 0.05em;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Fallback - ensure company name is always visible */
.timeline-company {
    color: var(--color-accent-dark);
}

.timeline-title {
    font-size: 1.3rem;
    font-weight: 400;
    color: #666;
    margin-bottom: 30px;
    letter-spacing: 0.05em;
}

.timeline-description,
.timeline-responsibilities,
.timeline-section {
    margin-bottom: 25px;
}

.timeline-description p,
.timeline-responsibilities p,
.timeline-section p {
    font-weight: 600;
    color: var(--color-accent-dark);
    margin-bottom: 15px;
    font-size: 1.1rem;
    position: relative;
    padding-left: 15px;
}

.timeline-description p::before,
.timeline-responsibilities p::before,
.timeline-section p::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
}

.timeline-description ul,
.timeline-responsibilities ul,
.timeline-section ul {
    list-style: none;
    padding-left: 0;
}

.timeline-description li,
.timeline-responsibilities li,
.timeline-section li {
    font-size: 1rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 10px;
    padding-left: 25px;
    position: relative;
}

.timeline-description li::before,
.timeline-responsibilities li::before,
.timeline-section li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.1em;
}

/* ========================================
   SECTION 5: EDUCATION
   ======================================== */
.education {
    min-height: auto;
    padding: 80px 0;
    background: linear-gradient(180deg, var(--color-bg-section-5) 0%, var(--color-bg-white) 100%);
    display: flex;
    align-items: center;
    transition: var(--transition-smooth);
}

.education.active {
    background: linear-gradient(180deg, #e0eef5 0%, #e8f0f5 100%);
}

.education-content {
    text-align: center;
    opacity: 0;
}

.education-school {
    font-size: 2rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    letter-spacing: 0.05em;
}

.education-location {
    font-size: 1.1rem;
    color: var(--color-accent-dark);
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* ========================================
   SECTION 6: CLOSING
   ======================================== */
.closing {
    min-height: auto;
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.closing.active {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
}

.closing-text {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 300;
    color: #ffffff;
    text-align: center;
    line-height: 1.6;
    letter-spacing: 0.02em;
    opacity: 0;
    max-width: 800px;
}

/* ========================================
   SECTION TITLE STYLING
   ======================================== */
.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 300;
    text-align: center;
    margin-bottom: 50px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    border-radius: 2px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .hero {
        min-height: auto;
        padding: 60px 0;
    }

    .hero-name {
        font-size: 2rem;
        letter-spacing: 0.1em;
        margin-bottom: 30px;
        color: var(--color-accent-dark) !important;
        -webkit-text-fill-color: var(--color-accent-dark) !important;
    }

    .hero-name .hero-name-letter {
        color: var(--color-accent-dark) !important;
        -webkit-text-fill-color: var(--color-accent-dark) !important;
    }

    .hero-main-content {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }

    .hero-info {
        text-align: center;
        align-items: center;
    }

    .hero-title {
        text-align: center;
    }

    .qualifications-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }


    .timeline-content {
        padding: 40px 30px;
        padding-left: 40px;
    }

    .timeline-company {
        font-size: 1.8rem;
        color: var(--color-accent-dark) !important;
        -webkit-text-fill-color: var(--color-accent-dark) !important;
    }

    .timeline-period {
        font-size: 0.95rem;
        padding: 6px 16px;
    }

    .tool-items {
        gap: 20px;
        row-gap: 30px;
    }

    .tool-item {
        padding: 10px 18px;
        font-size: 0.9rem;
        opacity: 1 !important;
        margin: 6px;
    }

    .tool-category-title {
        opacity: 1 !important;
    }

    .qual-group {
        opacity: 1 !important;
        transform: none !important;
    }
}

@media (max-width: 480px) {
    .hero {
        min-height: auto;
        padding: 40px 0;
    }

    .hero-image {
        width: 140px;
        height: 140px;
        border-width: 3px;
    }

    .hero-name {
        font-size: 1.8rem;
        letter-spacing: 0.08em;
        margin-bottom: 25px;
        color: var(--color-accent-dark) !important;
        -webkit-text-fill-color: var(--color-accent-dark) !important;
    }

    .hero-name .hero-name-letter {
        color: var(--color-accent-dark) !important;
        -webkit-text-fill-color: var(--color-accent-dark) !important;
    }

    .hero-title {
        font-size: 0.9rem;
    }

    .hero-contact-item {
        font-size: 0.85rem;
    }

    .timeline-content {
        padding: 30px 20px;
        padding-left: 30px;
    }

    .timeline-item {
        margin-bottom: 100px;
        opacity: 1 !important;
        transform: none !important;
    }

    .timeline-company {
        font-size: 1.5rem;
        color: var(--color-accent-dark) !important;
        -webkit-text-fill-color: var(--color-accent-dark) !important;
    }

    .timeline-period {
        font-size: 0.8rem;
        padding: 5px 12px;
        letter-spacing: 0.08em;
    }

    .timeline-period::before {
        display: none;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 40px;
    }
}

/* ========================================
   ZALO QR CODE POPUP
   ======================================== */
.zalo-popup {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
}

.zalo-popup.active {
    display: flex;
}

.zalo-popup-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.zalo-popup-content {
    position: relative;
    background: var(--color-bg-white);
    border-radius: 16px;
    padding: 40px;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    z-index: 10001;
    animation: popup-fade-in 0.3s ease;
}

.zalo-popup-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--color-text-medium);
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition-smooth);
}

.zalo-popup-close:hover {
    background: #f0f0f0;
    color: var(--color-accent);
    transform: rotate(90deg);
}

.zalo-popup-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-accent-dark);
    text-align: center;
    margin-bottom: 25px;
    letter-spacing: 0.05em;
}

.zalo-popup-qr {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 20px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.zalo-qr-image {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.zalo-popup-text {
    text-align: center;
    color: var(--color-text-medium);
    font-size: 0.95rem;
    margin: 0;
}

@keyframes popup-fade-in {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}