/* ===================================
   CSS Variables & Root Styles
   =================================== */
:root {
    /* Colors - Professional Tech Palette */
    --primary-color: #00d4ff;
    --secondary-color: #7c3aed;
    --accent-color: #10b981;
    --dark-bg: #0a0e1a;
    --darker-bg: #050810;
    --card-bg: #131825;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: #27272a;
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-2: linear-gradient(135deg, #10b981 0%, #00d4ff 100%);
    
    /* Fonts */
    --font-primary: 'Syne', sans-serif;
    --font-mono: 'JetBrains Mono', 'Space Mono', monospace;
    
    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 20px;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ===================================
   Global Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: var(--font-primary);
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

section {
    padding: var(--section-padding);
    position: relative;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

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

/* ===================================
   Navigation
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.navbar.scrolled {
    padding: 15px 0;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 24px;
    font-weight: 800;
    font-family: var(--font-mono);
    display: flex;
    align-items: center;
    gap: 5px;
}

.logo-bracket {
    color: var(--primary-color);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 5px 0;
    letter-spacing: 0.5px;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-smooth);
}

/* ===================================
   Hero Section
   =================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 212, 255, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

.code-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.hero-greeting {
    display: inline-block;
    font-size: 18px;
    font-family: var(--font-mono);
    color: var(--primary-color);
    margin-bottom: 15px;
}

.hero-title {
    font-size: 60px;
    font-weight: 800;
    margin-bottom: 20px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    min-height: 40px;
}

.typing-prefix {
    color: var(--accent-color);
}

.cursor {
    animation: blink 1s infinite;
    color: var(--primary-color);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    margin-bottom: 40px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 212, 255, 0.3);
}

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

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

.hero-social {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 20px;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.social-link:hover {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
    transform: translateY(-5px);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    animation: fadeInRight 0.8s ease;
}

.visual-frame {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.frame-corner {
    position: absolute;
    width: 60px;
    height: 60px;
    border: 3px solid var(--primary-color);
}

.frame-corner.tl {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
}

.frame-corner.tr {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
}

.frame-corner.bl {
    bottom: 0;
    left: 0;
    border-right: none;
    border-top: none;
}

.frame-corner.br {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.floating-card {
    position: absolute;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 24px;
    color: var(--primary-color);
}

.card-1 {
    top: 20px;
    right: -20px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 80px;
    left: -30px;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20px;
    right: -30px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ===================================
   Section Headers
   =================================== */
.section-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 60px;
}

.section-number {
    font-family: var(--font-mono);
    font-size: 24px;
    color: var(--primary-color);
    font-weight: 700;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    color: var(--text-primary);
}

.title-line {
    flex: 1;
    height: 2px;
    background: var(--border-color);
    position: relative;
    overflow: hidden;
}

.title-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 30%;
    height: 100%;
    background: var(--gradient-1);
}

/* ===================================
   About Section
   =================================== */
.about-section {
    background: var(--darker-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
}

.about-text {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.9;
}

.about-intro {
    font-size: 19px;
    color: var(--text-primary);
    margin-bottom: 25px;
}

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

.about-text p {
    margin-bottom: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    transition: var(--transition-smooth);
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
}

.about-details {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.detail-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    transition: var(--transition-smooth);
}

.detail-card:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.detail-card h3 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 8px;
    font-family: var(--font-mono);
}

.detail-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================
   Experience Section (Timeline)
   =================================== */
.timeline {
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 50px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.timeline-item:nth-child(2) {
    animation-delay: 0.2s;
}

.timeline-item:nth-child(3) {
    animation-delay: 0.4s;
}

.timeline-marker {
    position: absolute;
    left: -55px;
    top: 0;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--dark-bg);
    box-shadow: 0 0 0 3px var(--border-color);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.timeline-date {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--primary-color);
    background: rgba(0, 212, 255, 0.1);
    padding: 5px 15px;
    border-radius: 20px;
    margin-bottom: 15px;
}

.timeline-title {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.timeline-company {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.timeline-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.timeline-achievements {
    list-style: none;
    margin-bottom: 20px;
}

.timeline-achievements li {
    font-size: 15px;
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.timeline-achievements li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 18px;
}

.timeline-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.timeline-tags span {
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--primary-color);
    background: rgba(0, 212, 255, 0.1);
    padding: 5px 12px;
    border-radius: 5px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

/* ===================================
   Skills Section
   =================================== */
.skills-section {
    background: var(--darker-bg);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.skill-category {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.skill-category:hover {
    border-color: var(--primary-color);
    transform: translateY(-10px);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    margin-bottom: 20px;
}

.skill-category h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 25px;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    position: relative;
}

.skill-name {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.skill-bar {
    height: 8px;
    background: var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-1);
    border-radius: 10px;
    transition: width 1s ease;
    position: relative;
    overflow: hidden;
}

.skill-progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.skill-percent {
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--primary-color);
    font-weight: 600;
}

/* ===================================
   Projects Section
   =================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition-smooth);
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.project-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-10px);
}

.project-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-smooth);
}

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

.project-link {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    transition: var(--transition-bounce);
}

.project-link:hover {
    transform: scale(1.2) rotate(360deg);
}

.project-content {
    padding: 25px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.project-tags span {
    font-size: 11px;
    font-family: var(--font-mono);
    color: var(--primary-color);
    background: rgba(0, 212, 255, 0.1);
    padding: 4px 10px;
    border-radius: 5px;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.project-title {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.project-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tech span {
    font-size: 12px;
    font-family: var(--font-mono);
    color: var(--text-muted);
    background: transparent;
    padding: 4px 10px;
    border-radius: 5px;
    border: 1px solid var(--border-color);
}

/* ===================================
   Contact Section
   =================================== */
.contact-section {
    background: var(--darker-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 32px;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.contact-info > p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-text h4 {
    font-size: 16px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.contact-text p,
.contact-text a {
    font-size: 15px;
    color: var(--text-secondary);
}

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

.contact-social {
    display: flex;
    gap: 15px;
}

.social-icon {
    width: 50px;
    height: 50px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-secondary);
    transition: var(--transition-smooth);
}

.social-icon:hover {
    background: var(--gradient-1);
    color: white;
    border-color: transparent;
    transform: translateY(-5px);
}

.cta-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 50px;
    text-align: center;
    transition: var(--transition-smooth);
}

.cta-box:hover {
    border-color: var(--primary-color);
}

.cta-box i {
    font-size: 60px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.cta-box h3 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 15px;
}

.cta-box p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
}

.footer-content {
    text-align: center;
}

.footer-text p {
    font-size: 14px;
    color: var(--text-secondary);
}

.footer-text i {
    color: #ef4444;
    margin: 0 5px;
}

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

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .visual-frame {
        width: 300px;
        height: 300px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        height: calc(100vh - 70px);
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 40px 20px;
        gap: 20px;
        transition: right 0.3s ease;
        border-left: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translateY(10px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-10px);
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline {
        padding-left: 30px;
    }
    
    .timeline-marker {
        left: -36px;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .visual-frame {
        width: 250px;
        height: 250px;
    }
    
    .floating-card {
        font-size: 12px;
        padding: 10px 15px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .cta-box {
        padding: 30px;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }