/* UCLeeds.app Styles */
/* Brand Colors: Light Blue #00bdee, Dark Blue #002b49, White #ffffff */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Smooth scrolling for the entire page */
html {
    scroll-behavior: smooth;
}

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

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

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Animation classes for JavaScript */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    /* Prevent layout shift during animation */
    will-change: transform, opacity;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

.animate-left {
    opacity: 0;
    transform: translateX(-20px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform, opacity;
}

.animate-left.animated {
    opacity: 1;
    transform: translateX(0);
}

.animate-right {
    opacity: 0;
    transform: translateX(20px);
    transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform, opacity;
}

.animate-right.animated {
    opacity: 1;
    transform: translateX(0);
}

body {
    font-family: 'Oswald', sans-serif;
    line-height: 1.6;
    color: #002b49;
    background-color: #ffffff;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

body.loaded {
    opacity: 1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 43, 73, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 40px;
    width: auto;
    /* Apply brand blue color filter to make logo visible on white background */
    filter: brightness(0) saturate(100%) invert(27%) sepia(99%) saturate(1234%) hue-rotate(184deg) brightness(96%) contrast(101%);
}

.app-suffix {
    font-size: 1.5rem;
    font-weight: 600;
    color: #00bdee;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #002b49;
    font-weight: 500;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-link:hover {
    color: #00bdee;
    background-color: rgba(0, 189, 238, 0.1);
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: #00bdee;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 80%;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: #002b49;
    margin: 3px 0;
    transition: 0.3s;
}

.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: white;
        box-shadow: 0 5px 15px rgba(0, 43, 73, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav.nav-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        padding: 1rem 0;
        gap: 0;
    }

    .nav-list li {
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-list li:last-child {
        border-bottom: none;
    }

    .nav-link {
        display: block;
        padding: 1rem 2rem;
        font-size: 1.2rem;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #00bdee 0%, #002b49 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 43, 73, 0.3);
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-subtitle {
    font-size: 1.3rem;
    font-weight: 400;
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.9s both;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 5px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0, 43, 73, 0.2);
}

.btn-primary {
    background-color: #00bdee;
    color: white;
    border-color: #00bdee;
}

.btn-primary:hover {
    background-color: transparent;
    border-color: #00bdee;
    color: #00bdee;
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

.btn-secondary:hover {
    background-color: white;
    color: #002b49;
}

.btn-outline {
    background-color: transparent;
    color: #00bdee;
    border-color: #00bdee;
}

.btn-outline:hover {
    background-color: #00bdee;
    color: white;
}

/* Applications Section */
.applications {
    padding: 100px 0 80px;
    background-color: #f8f9fa;
    /* Ensure proper separation from hero section */
    margin-top: 0;
    position: relative;
    z-index: 2;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
    /* Ensure proper spacing and prevent overlap during animations */
    position: relative;
    z-index: 1;
    padding-top: 2rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: #002b49;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.app-card {
    background: white;
    border-radius: 10px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 43, 73, 0.1);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #00bdee, #002b49);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.app-card:hover::before {
    transform: scaleX(1);
}

.app-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 43, 73, 0.2);
}

.app-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #00bdee, #002b49);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
}

.app-card:hover .app-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 10px 20px rgba(0, 189, 238, 0.3);
}

.app-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #002b49;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.app-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.app-features {
    list-style: none;
    margin-bottom: 2rem;
}

.app-features li {
    padding: 0.5rem 0;
    color: #002b49;
    font-weight: 500;
    position: relative;
    padding-left: 1.5rem;
}

.app-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #00bdee;
    font-weight: bold;
}

.app-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 2.5rem;
}

.app-actions .btn {
    min-width: 200px;
    padding: 1.2rem 2.5rem;
    font-size: 1.2rem;
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #00bdee;
    text-transform: uppercase;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.image-placeholder {
    background: #f8f9fa;
    border-radius: 10px;
    overflow: hidden;
}

/* Footer */
.footer {
    background-color: #002b49;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-logo {
    height: 40px;
    width: auto;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
}

.footer-description {
    color: #ccc;
    font-size: 1rem;
}

.footer-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #00bdee;
    text-transform: uppercase;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #00bdee;
}

.contact-info p {
    color: #ccc;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 1rem;
    text-align: center;
    color: #ccc;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .apps-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .app-actions {
        flex-direction: column;
        align-items: center;
    }

    .app-actions .btn {
        min-width: 250px;
        width: 100%;
        max-width: 300px;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .app-card {
        padding: 2rem;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 1rem;
    }
}