:root {
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --secondary-color: #4CAF50;
    --accent-color: #FF5722;
    --bg-color: rgba(250, 250, 250, 0.95);
    --card-bg: rgba(255, 255, 255, 0.95);
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #E0E0E0;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.15);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Content Protection for Images */
img {
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    user-drag: none;
    pointer-events: auto;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    /* Content Protection */
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Allow interaction with buttons and links */
a, button, .btn {
    -webkit-user-select: auto !important;
    -moz-user-select: auto !important;
    -ms-user-select: auto !important;
    user-select: auto !important;
    pointer-events: auto !important;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(120, 119, 198, 0.3), transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(252, 103, 103, 0.3), transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(88, 177, 159, 0.3), transparent 50%);
    z-index: -1;
    animation: float 20s ease-in-out infinite;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes float {
    0%, 100% {
        transform: scale(1) translate(0, 0);
    }
    33% {
        transform: scale(1.1) translate(10px, -10px);
    }
    66% {
        transform: scale(0.9) translate(-10px, 10px);
    }
}

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    z-index: 1000;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 2px;
}

.nav-brand .tagline {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect fill="rgba(255,255,255,0.05)" width="50" height="50"/></svg>');
    opacity: 0.1;
}

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

.hero-title {
    font-size: 56px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 20px;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.5;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 16px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
}

.phone-mockup {
    text-align: center;
    animation: float 3s ease-in-out infinite;
}

.phone-mockup img {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));
}

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

/* Section Styling */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 42px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 50px;
}

/* Profile Section */
.profile-section {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.profile-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.profile-header {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
}

.profile-info h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 5px;
}

.profile-info p {
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 20px;
}

.profile-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
}

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

.profile-description {
    margin-bottom: 30px;
    line-height: 1.8;
    font-size: 16px;
    color: var(--text-secondary);
}

.tech-stack h4 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

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

.tech-tag {
    background: var(--primary-color);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

/* Apps Section */
.apps-section {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.app-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.2);
    border-color: rgba(255, 255, 255, 0.8);
}

.app-card-header {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.app-card-header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Badge for certifications */
.app-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 6px 12px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    color: #2196F3;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    border: 1px solid rgba(33, 150, 243, 0.3);
}

.app-badge svg {
    width: 14px;
    height: 14px;
}

.app-badge.trainer-approved {
    color: #4CAF50;
    border-color: rgba(76, 175, 80, 0.3);
}

.app-icon {
    position: absolute;
    bottom: -30px;
    left: 20px;
    width: 80px;
    height: 80px;
    border-radius: 20px;
    border: 4px solid white;
    box-shadow: var(--shadow);
}

.app-card-body {
    padding: 40px 20px 20px;
}

.app-card-body h3 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.app-category {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
}

.app-rating {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.stars {
    color: #FFC107;
    font-size: 16px;
}

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

.app-description {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.app-tag {
    background: var(--bg-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 12px;
}

.app-card-footer {
    display: flex;
    gap: 10px;
}

.btn-small {
    padding: 10px 20px;
    font-size: 14px;
    flex: 1;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.7);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 16px;
    max-width: 900px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    animation: slideUp 0.3s;
}

@keyframes slideUp {
    from { transform: translateY(50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.close-modal {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 36px;
    font-weight: 300;
    color: var(--text-secondary);
    cursor: pointer;
    z-index: 1;
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 40px;
}

.modal-header {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.modal-app-icon {
    width: 100px;
    height: 100px;
    border-radius: 22px;
    box-shadow: var(--shadow);
}

.modal-app-info h3 {
    font-size: 28px;
    margin-bottom: 8px;
}

.modal-app-info p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.modal-rating {
    display: flex;
    align-items: center;
    gap: 15px;
}

.modal-media {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    overflow-x: auto;
    padding-bottom: 10px;
}

.modal-media::-webkit-scrollbar {
    height: 8px;
}

.modal-media::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 4px;
}

.modal-media::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.media-item {
    flex: 0 0 auto;
    width: 200px;
    height: 400px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.media-item img,
.media-item video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.modal-description h4,
.modal-features h4 {
    font-size: 20px;
    margin-bottom: 15px;
}

.modal-description p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 30px;
}

.modal-features-list {
    list-style: none;
    margin-bottom: 30px;
}

.modal-features-list li {
    padding: 12px 0;
    padding-left: 30px;
    position: relative;
    color: var(--text-secondary);
}

.modal-features-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
    font-size: 18px;
}

.modal-actions {
    text-align: center;
}

/* Contact Section */
.contact-section {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

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

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    font-size: 18px;
    color: var(--text-secondary);
}

.contact-item svg {
    color: var(--primary-color);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.footer-brand h3 {
    margin-bottom: 10px;
}

.footer-brand p {
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: 20px;
    justify-content: flex-end;
    align-items: flex-start;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.7;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    opacity: 0.5;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        gap: 15px;
        font-size: 14px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .phone-mockup {
        max-width: 300px;
        margin: 0 auto;
    }

    .section-title {
        font-size: 32px;
    }

    .profile-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-avatar {
        margin: 0 auto;
    }

    .profile-stats {
        justify-content: center;
    }

    .apps-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }

    .modal-content {
        margin: 10% 10px;
        max-height: 80vh;
    }

    .modal-body {
        padding: 30px 20px;
    }

    .modal-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .modal-app-icon {
        margin: 0 auto;
    }
}