/* Mobile Styles */
@media screen and (max-width: 768px) {
    /* Header & Navigation */
    header {
        padding: 1rem;
        position: fixed;
        width: 100%;
        top: 0;
        z-index: 1000;
        background: var(--background-dark);
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: var(--background-dark);
        padding: 20px;
        flex-direction: column;
        align-items: center;
        z-index: 1000;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        margin: 10px 0;
        font-size: 1.1rem;
        width: 100%;
        text-align: center;
        padding: 10px;
    }

    .hamburger-menu {
        display: block;
    }

    .search-container {
        display: none;
    }

    .auth-buttons {
        display: none;
    }

    /* Hero Section */
    .hero {
        padding: 80px 20px 40px;
        text-align: center;
        min-height: 100vh;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .hero h1 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }

    .hero p {
        font-size: 1rem;
        margin-bottom: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }

    .hero-buttons button {
        width: 100%;
        padding: 12px;
    }

    /* Features Section */
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    .feature-card {
        padding: 20px;
    }

    /* Workouts Section */
    .workout-filters {
        flex-wrap: wrap;
        gap: 10px;
        padding: 10px;
        justify-content: center;
    }

    .workout-categories {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    .workout-card {
        margin: 0;
    }

    /* Diet Plans Section */
    .diet-plans-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    /* Testimonials Section */
    .testimonial-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    /* Nutrition Section */
    .nutrition-plans {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    /* BMI Calculator Section */
    .calculator-container {
        flex-direction: column;
        padding: 20px;
    }

    .calculator-form {
        width: 100%;
    }

    .bmi-info {
        width: 100%;
        margin-top: 20px;
    }

    /* Workout Timer Section */
    .timer-container {
        padding: 20px;
    }

    .timer-settings {
        flex-direction: column;
        gap: 15px;
    }

    /* Exercise Library Section */
    .exercise-filters {
        flex-wrap: wrap;
        gap: 10px;
        padding: 10px;
    }

    .exercise-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    /* Community Forum Section */
    .forum-categories {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 20px;
    }

    /* Progress Section */
    .progress-container {
        padding: 20px;
    }

    .progress-filters {
        flex-direction: column;
        gap: 10px;
    }

    .progress-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    /* About Section */
    .about-content {
        padding: 20px;
        grid-template-columns: 1fr;
    }

    .trainer-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* Contact Section */
    .contact-form {
        padding: 20px;
    }

    .contact-form form {
        width: 100%;
    }

    /* Health Assessment Form */
    .assessment-form {
        padding: 20px;
    }

    .form-section {
        padding: 15px;
    }

    /* Profile Section */
    .profile-container {
        padding: 20px;
    }

    .profile-content {
        grid-template-columns: 1fr;
    }

    .saved-workouts {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 40px 20px;
    }

    .social-links {
        justify-content: center;
    }

    /* Modals */
    .modal-content {
        width: 90%;
        max-width: none;
        margin: 20px;
        padding: 20px;
    }

    /* Chat Container */
    .chat-container {
        width: 100%;
        height: 100%;
        max-width: none;
        border-radius: 0;
    }

    /* Mobile Menu Toggle */
    .hamburger-btn {
        display: block;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 1.5rem;
        cursor: pointer;
        padding: 5px;
    }

    /* Show Auth Buttons in Mobile Menu */
    .nav-links.active .auth-buttons {
        display: flex;
        flex-direction: column;
        width: 100%;
        gap: 10px;
        margin-top: 20px;
    }

    .nav-links.active .auth-buttons button {
        width: 100%;
        padding: 12px;
    }

    /* Show Search in Mobile Menu */
    .nav-links.active .search-container {
        display: block;
        width: 100%;
        margin: 20px 0;
    }

    .nav-links.active .search-container input {
        width: 100%;
        padding: 12px;
    }

    /* Fix Section Spacing */
    section {
        padding: 60px 20px;
    }

    /* Fix Form Elements */
    input, select, textarea {
        font-size: 16px; /* Prevent zoom on iOS */
        padding: 12px;
    }

    /* Fix Button Sizes */
    button {
        padding: 12px 20px;
        font-size: 1rem;
    }

    /* Fix Image Sizes */
    img {
        max-width: 100%;
        height: auto;
    }

    /* Fix Chart Responsiveness */
    .progress-chart {
        height: 300px;
    }
}

/* Additional Mobile Optimizations */
@media screen and (max-width: 480px) {
    /* Further Mobile Optimizations */
    :root {
        --mobile-padding: 0.5rem;
    }

    /* Typography Adjustments */
    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.2rem;
    }

    p {
        font-size: 0.9rem;
    }

    /* Button Adjustments */
    .cta-button,
    .view-diet-btn,
    .view-workout,
    .generate-diet-btn {
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
    }

    /* Card Adjustments */
    .feature-card,
    .workout-card,
    .nutrition-card,
    .testimonial-card,
    .trainer-card {
        padding: 1rem;
    }

    /* Stats Grid */
    .stats {
        grid-template-columns: 1fr;
    }

    /* Form Elements */
    input,
    select,
    textarea {
        font-size: 0.9rem;
        padding: 0.7rem;
    }

    /* Modal Adjustments */
    .modal-content {
        padding: 1rem;
    }

    /* Timer Display */
    .timer-display {
        font-size: 2.5rem;
    }

    /* Chatbot Button */
    .chatbot-button {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* Landscape Mode Optimizations */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 2rem var(--mobile-padding);
    }

    .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* High DPI Screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .logo-icon,
    .feature-icon {
        font-size: 1.2em;
    }
}