/* ===================================
   twentythree Dev - Modern Website
   =================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #7c3aed;
    --primary-light: #a78bfa;
    --primary-dark: #5b21b6;
    --secondary: #06b6d4;
    --accent: #f59e0b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #0f172a 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    
    /* Background */
    --bg-dark: #0a0a0f;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-glass: rgba(255, 255, 255, 0.05);
    
    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* Borders */
    --border-glass: rgba(255, 255, 255, 0.1);
    
    /* Shadows */
    --shadow-glow: 0 0 60px rgba(124, 58, 237, 0.3);
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --nav-height: 80px;
    --section-padding: 120px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

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

/* Background Effects */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(124, 58, 237, 0.3), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(6, 182, 212, 0.15), transparent),
        radial-gradient(ellipse 50% 30% at 0% 80%, rgba(245, 158, 11, 0.1), transparent);
    pointer-events: none;
    z-index: 0;
}

.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100vh) translateX(50px); opacity: 0; }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    height: 100%;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-logo img {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    position: relative;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    transform-origin: center;
}

/* Hamburger to X animation */
.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    padding: 20px;
    flex-direction: column;
    gap: 20px;
    z-index: 999;
    border-bottom: 1px solid var(--border-glass);
}

.mobile-menu.active {
    display: flex;
}

.mobile-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    padding: 10px 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.5);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    padding: calc(var(--nav-height) + 60px) 40px 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    margin-bottom: 24px;
}

.title-line {
    display: block;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: inline;
}

.stat-suffix {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-light);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #1a1a2e 0%, #0f0f1a 100%);
    border-radius: 40px;
    padding: 12px;
    box-shadow: 
        0 50px 100px rgba(0, 0, 0, 0.5),
        inset 0 1px 1px rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--gradient-dark);
    border-radius: 32px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-carousel {
    position: relative;
    width: 180px;
    height: 180px;
}

.carousel-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-lg);
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.5s ease;
}

.carousel-img.active {
    opacity: 1;
    transform: scale(1);
}

/* Floating Cards */
.floating-cards {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.floating-card {
    position: absolute;
    width: 80px;
    height: 80px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: floatCard 6s ease-in-out infinite;
}

.floating-card img {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
}

.card-1 {
    top: 10%;
    left: -10%;
    animation-delay: 0s;
}

.card-2 {
    top: 60%;
    right: -5%;
    animation-delay: 2s;
}

.card-3 {
    bottom: 5%;
    left: 5%;
    animation-delay: 4s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

/* Section Styles */
section {
    position: relative;
    z-index: 1;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 80px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--primary-light);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 16px;
}

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

/* Apps Section */
.apps-section {
    padding: var(--section-padding) 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.app-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.app-card:hover {
    transform: translateY(-8px);
    border-color: rgba(124, 58, 237, 0.3);
}

.app-card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: radial-gradient(ellipse at top, rgba(124, 58, 237, 0.15), transparent);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.app-card:hover .app-card-glow {
    opacity: 1;
}

.app-card-content {
    position: relative;
    padding: 40px;
}

.app-icon-wrapper {
    position: relative;
    width: 100px;
    height: 100px;
    margin-bottom: 24px;
}

.app-icon {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.app-icon-ring {
    position: absolute;
    top: -8px;
    left: -8px;
    right: -8px;
    bottom: -8px;
    border: 2px solid var(--border-glass);
    border-radius: calc(var(--radius-lg) + 8px);
    opacity: 0;
    transition: all var(--transition-normal);
}

.app-card:hover .app-icon-ring {
    opacity: 1;
    border-color: var(--primary);
}

.app-name {
    font-size: 1.75rem;
    margin-bottom: 4px;
}

.app-tagline {
    color: var(--primary-light);
    font-weight: 500;
    margin-bottom: 16px;
}

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

.app-features {
    list-style: none;
    margin-bottom: 28px;
}

.app-features li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.app-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 8px;
    height: 8px;
    background: var(--gradient-primary);
    border-radius: 50%;
}

.play-store-btn {
    display: inline-block;
    transition: transform var(--transition-fast);
}

.play-store-btn:hover {
    transform: scale(1.05);
}

.play-badge {
    height: 50px;
    width: auto;
}

/* About Section */
.about-section {
    padding: var(--section-padding) 40px;
    background: linear-gradient(180deg, transparent, rgba(124, 58, 237, 0.05), transparent);
}

.about-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

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

.about-logo {
    max-width: 280px;
    height: auto;
}

.about-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.3), transparent 70%);
    z-index: -1;
    animation: glowPulse 4s ease-in-out infinite;
}

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

.tech-stack {
    display: flex;
    gap: 24px;
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.tech-item svg {
    width: 32px;
    height: 32px;
    fill: var(--primary-light);
}

.about-content .section-tag,
.about-content .section-title {
    text-align: left;
}

.about-text {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.1rem;
    line-height: 1.8;
}

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

.about-values {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 40px;
}

.value-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.value-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.value-icon svg {
    stroke: var(--primary-light);
}

.value-text h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.value-text p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Contact Section */
.contact-section {
    padding: var(--section-padding) 40px;
}

.contact-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.contact-content .section-tag,
.contact-content .section-title {
    text-align: left;
}

.contact-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
}

.contact-method:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
    transform: translateX(8px);
}

.contact-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon svg {
    stroke: white;
}

.contact-details {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.contact-value {
    font-size: 1.1rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Contact Card */
.contact-visual {
    display: flex;
    justify-content: center;
}

.contact-card {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    background: var(--gradient-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
}

.card-header {
    display: flex;
    justify-content: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-glass);
}

.card-logo {
    height: 50px;
    width: auto;
}

.card-body {
    margin-bottom: 32px;
}

.card-body p {
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.7;
}

.card-apps {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.card-apps img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-fast);
}

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

/* Footer */
.footer {
    padding: 60px 40px 30px;
    border-top: 1px solid var(--border-glass);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 60px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.footer-logo {
    height: 40px;
    width: auto;
}

.footer-brand span {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
}

.footer-tagline {
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h5 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 40px auto 0;
    padding-top: 30px;
    border-top: 1px solid var(--border-glass);
    text-align: center;
}

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

/* Responsive Design */
@media (max-width: 1200px) {
    .hero {
        gap: 60px;
    }
    
    .apps-grid {
        gap: 24px;
    }
}

@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: calc(var(--nav-height) + 40px);
    }
    
    .hero-subtitle {
        margin: 0 auto 40px;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        order: -1;
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
    }
    
    .floating-cards {
        display: none;
    }
    
    .apps-grid {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }
    
    .about-container,
    .contact-container {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }
    
    .about-content .section-tag,
    .about-content .section-title,
    .contact-content .section-tag,
    .contact-content .section-title {
        text-align: center;
    }
    
    .about-values {
        align-items: center;
    }
    
    .value-item {
        max-width: 400px;
    }
    
    .contact-methods {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .footer-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-main {
        order: 1;
    }
    
    .footer-links {
        order: 0;
        gap: 60px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: calc(var(--nav-height) + 20px) 20px 40px;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 32px;
    }
    
    .phone-mockup {
        width: 240px;
        height: 480px;
        margin: 0 auto;
    }
    
    .phone-screen {
        position: relative;
    }
    
    .app-carousel {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 140px;
        height: 140px;
    }
    
    .apps-section,
    .about-section,
    .contact-section {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .app-card-content {
        padding: 28px;
    }
    
    .tech-stack {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .footer {
        padding: 40px 20px 20px;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .contact-method {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
}

/* Animations on Scroll */
.app-card,
.value-item,
.contact-method,
.contact-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.app-card.visible,
.value-item.visible,
.contact-method.visible,
.contact-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation delays */
.app-card:nth-child(1) { transition-delay: 0.1s; }
.app-card:nth-child(2) { transition-delay: 0.2s; }
.app-card:nth-child(3) { transition-delay: 0.3s; }
.app-card:nth-child(4) { transition-delay: 0.4s; }

.value-item:nth-child(1) { transition-delay: 0.1s; }
.value-item:nth-child(2) { transition-delay: 0.2s; }
.value-item:nth-child(3) { transition-delay: 0.3s; }