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

/* Smooth theme transitions */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

:root {
    /* Theme: Light (Default) */
    --primary-white: #FFFFFF;
    --light-gray: #F8F9FA;
    --medium-gray: #E9ECEF;
    --border-gray: #DEE2E6;
    --dark-gray: #1a1a1a;
    --primary-blue: #007bff;
    --primary-blue-hover: #0056b3;
    --success-green: #28a745;
    --warning-orange: #ffc107;
    --danger-red: #dc3545;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --focus-ring: 0 0 0 3px rgba(0, 123, 255, 0.25);
    --text-primary: #1a1a1a;
    --text-secondary: #5a5a5a;
    --bg-primary: #F8F9FA;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #E9ECEF;
    --header-gradient: linear-gradient(135deg, #007bff, #0056b3);
}

/* Theme: Dark */
[data-theme="dark"] {
    --primary-white: #1a1a1a;
    --light-gray: #2d2d2d;
    --medium-gray: #404040;
    --border-gray: #555555;
    --dark-gray: #ffffff;
    --primary-blue: #4dabf7;
    --primary-blue-hover: #339af0;
    --success-green: #51cf66;
    --warning-orange: #ffd43b;
    --danger-red: #ff6b6b;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.4);
    --focus-ring: 0 0 0 3px rgba(77, 171, 247, 0.25);
    --text-primary: #ffffff;
    --text-secondary: #d0d0d0;
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --header-gradient: linear-gradient(135deg, #2d2d2d, #1a1a1a);
}

/* Theme: Blue */
[data-theme="blue"] {
    --primary-white: #FFFFFF;
    --light-gray: #f0f8ff;
    --medium-gray: #e6f3ff;
    --border-gray: #b3d9ff;
    --dark-gray: #1a365d;
    --primary-blue: #2563eb;
    --primary-blue-hover: #1d4ed8;
    --success-green: #059669;
    --warning-orange: #d97706;
    --danger-red: #dc2626;
    --shadow: 0 2px 10px rgba(37, 99, 235, 0.1);
    --shadow-hover: 0 4px 20px rgba(37, 99, 235, 0.15);
    --focus-ring: 0 0 0 3px rgba(37, 99, 235, 0.25);
    --text-primary: #1a365d;
    --text-secondary: #475569;
    --bg-primary: #f0f8ff;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #e6f3ff;
    --header-gradient: linear-gradient(135deg, #2563eb, #1d4ed8);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    padding-bottom: 80px;
    font-size: 16px;
    font-weight: 400;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: var(--transition);
}

/* Skip to content link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-blue);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 1001;
    transition: var(--transition);
}

.skip-link:focus {
    top: 6px;
}

/* Header */
.app-header {
    background: var(--header-gradient);
    color: white;
    padding: 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: var(--transition);
}

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

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-switch {
    display: flex;
    gap: 0.25rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: 0.25rem;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.theme-btn {
    background: transparent;
    border: none;
    color: white;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    font-size: 0.9rem;
}

.theme-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.theme-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.5);
}

.theme-btn.active {
    background: rgba(255, 255, 255, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.header-content h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.language-switch {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    padding: 0.5rem 0.75rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.lang-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.lang-btn.active {
    background: white;
    color: var(--primary-blue);
    font-weight: 600;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    padding-bottom: 5rem; /* Espaço para a navegação inferior */
}

.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Cards */
.welcome-card,
.upload-card,
.feedback-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border-gray);
}

.welcome-card:hover,
.upload-card:hover,
.feedback-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.welcome-card h2,
.upload-card h2,
.feedback-card h2 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.welcome-card p,
.upload-card p,
.feedback-card p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin: 0;
    line-height: 1.6;
    letter-spacing: 0.01em;
}

/* Search */
.search-container {
    margin-bottom: 2rem;
}

.search-box {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    z-index: 1;
}

.search-box input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--border-radius-lg);
    font-size: 1.125rem;
    font-weight: 400;
    transition: var(--transition);
    background: var(--bg-secondary);
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: var(--focus-ring);
    transform: translateY(-1px);
}

.search-box input::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Section Tabs */
.section-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 1rem;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
    letter-spacing: 0.01em;
}

.tab-btn:hover {
    background-color: var(--hover-bg);
    color: var(--success-green);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: rgb(55, 114, 148);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Server Apps Header */
.server-apps-header {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 1rem;
    color: rgb(33, 63, 61);
}

.server-apps-header h3 {
    margin: 0 0 0.75rem 0;
    font-size: 1.625rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.3;
}

.server-apps-header p {
    margin: 0;
    opacity: 0.9;
    font-size: 1rem;
    line-height: 1.5;
    letter-spacing: 0.01em;
}

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

.server-actions .action-btn {
    background: rgba(255, 255, 255, 0.2);
    color: rgb(20, 78, 112);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.server-actions .action-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
}

.server-actions .action-btn i {
    font-size: 0.8rem;
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Apps Grid */
.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.app-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), #0056b3);
    transform: scaleX(0);
    transition: var(--transition);
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-blue);
}

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

.app-card:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.app-card h3 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.app-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 1rem;
    line-height: 1.6;
    letter-spacing: 0.01em;
}

.app-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: #6c757d;
}

.app-code {
    background: var(--light-gray);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-weight: 600;
    color: var(--primary-blue);
}

/* Server App Cards */
.server-app-card {
    position: relative;
    border: 2px solid var(--primary-color);
}

.server-app-card::before {
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.server-app-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    align-items: flex-end;
}

.server-app-info small {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.server-app-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.server-app-badge i {
    font-size: 0.7rem;
}

/* Empty State */
.empty-state,
.empty-feedback {
    text-align: center;
    padding: 3rem 1rem;
    color: #6c757d;
    animation: fadeIn 0.5s ease-in-out;
}

.empty-state i,
.empty-feedback i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--border-gray);
    opacity: 0.7;
}

.empty-state h3,
.empty-feedback h3 {
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
    font-weight: 600;
}

/* Access Code Section */
.access-code-section {
    background: var(--primary-white);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
    border: 1px solid var(--border-gray);
}

.access-code-section h3 {
    margin-bottom: 1rem;
    color: var(--dark-gray);
    font-weight: 600;
}

.code-input-container {
    display: flex;
    gap: 1rem;
    max-width: 400px;
    margin: 0 auto;
}

.code-input-container input {
    flex: 1;
    padding: 0.75rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--primary-white);
    color: var(--dark-gray);
}

.code-input-container input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: var(--focus-ring);
}

.code-input-container button {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    white-space: nowrap;
}

.code-input-container button:hover {
    background: #0056b3;
    transform: translateY(-1px);
}

.code-input-container button:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* Forms */
.upload-form {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    color: var(--dark-gray);
    letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--border-radius);
    font-size: 1.125rem;
    font-weight: 400;
    transition: var(--transition);
    font-family: inherit;
    background: var(--primary-white);
    color: var(--dark-gray);
    letter-spacing: 0.01em;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: var(--focus-ring);
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: #6c757d;
    font-size: 0.9375rem;
    line-height: 1.4;
    letter-spacing: 0.01em;
}

.form-group button {
    background: var(--medium-gray);
    border: 1px solid var(--border-gray);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    margin-top: 0.5rem;
    font-weight: 500;
}

.form-group button:hover {
    background: var(--border-gray);
    transform: translateY(-1px);
}

.form-group button:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.code-input-group {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
}

.code-input-group input {
    flex: 1;
}

.code-input-group button {
    white-space: nowrap;
    margin-top: 0;
}

.submit-btn {
    width: 100%;
    background: var(--success-green);
    color: white;
    border: none;
    padding: 1.125rem;
    border-radius: var(--border-radius);
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
}

.submit-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;
}

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

.submit-btn:hover {
    background: #218838;
    transform: translateY(-2px);
}

.submit-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.submit-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
}

.submit-btn:disabled::before {
    display: none;
}

/* Feedback */
.feedback-filters {
    margin-bottom: 2rem;
}

.feedback-filters select {
    max-width: 300px;
    padding: 0.75rem;
    border: 2px solid var(--border-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: var(--primary-white);
    color: var(--dark-gray);
    transition: var(--transition);
}

.feedback-filters select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: var(--focus-ring);
}

.feedback-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feedback-item {
    background: var(--primary-white);
    border-radius: var(--border-radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.feedback-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.feedback-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    position: relative;
}

.delete-feedback-btn {
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid #dc3545;
    color: #dc3545;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-size: 1rem;
    opacity: 0.8;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.delete-feedback-btn:hover {
    background: rgba(220, 53, 69, 0.1);
    opacity: 1;
    transform: scale(1.1);
}

.delete-feedback-btn:focus {
    outline: 2px solid #dc3545;
    outline-offset: 2px;
}

.delete-feedback-btn i {
    pointer-events: none;
}

.feedback-app {
    font-weight: 600;
    color: var(--primary-blue);
}

.feedback-date {
    color: #6c757d;
    font-size: 0.875rem;
}

.feedback-rating {
    margin-bottom: 0.5rem;
}

.feedback-text {
    color: var(--dark-gray);
    line-height: 1.7;
    margin-bottom: 1rem;
    font-size: 1rem;
    letter-spacing: 0.01em;
}



/* Rating Stars */
.rating-stars {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 0.5rem;
}

.star {
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    opacity: 0.3;
    user-select: none;
}

.star.active,
.star:hover {
    opacity: 1;
    transform: scale(1.1);
}

.star:focus {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: 2px;
}



.stop-btn {
    background: var(--danger-red);
    color: white;
}

.stop-btn:hover {
    background:rgb(158, 46, 31);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    padding: 1rem;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn 0.3s ease-out;
}

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

.modal-content {
    background: var(--primary-white);
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 1000px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-gray);
    background: var(--light-gray);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.app-info {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.app-code-badge {
    background: var(--primary-blue);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.files-count-badge {
    background: var(--success-green);
    color: var(--text-primary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.zip-status-badge {
    background: var(--primary-blue);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    animation: pulse 2s infinite;
}

.zip-status-badge i {
    font-size: 0.7rem;
}

.device-selector {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.device-btn {
    background: var(--light-gray);
    color: var(--dark-gray);
    border: 1px solid var(--border-gray);
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
}

.device-btn:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.device-btn.active {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.device-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.modal-header h3 {
    margin: 0;
    color: var(--dark-gray);
    font-weight: 600;
}

.modal-actions {
    display: flex;
    gap: 0.5rem;
}

.action-btn {
    background: var(--primary-blue);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.action-btn:hover {
    background: #0056b3;
    transform: translateY(-1px);
}

.action-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}



.delete-btn {
    background: var(--danger-red);
    color: white;
}

.delete-btn:hover {
    background: #c82333;
}

.delete-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* Delete Modal Styles */
.delete-warning {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.delete-warning i {
    color: #856404;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    display: block;
}

.delete-warning p {
    margin: 0.5rem 0;
    color: #856404;
}

.delete-warning strong {
    color: #721c24;
}

.delete-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

.cancel-btn {
    background: var(--light-gray);
    color: var(--dark-gray);
    border: 1px solid var(--border-gray);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.cancel-btn:hover {
    background: var(--medium-gray);
    border-color: var(--medium-gray);
}

.cancel-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.delete-confirm-btn {
    background: var(--danger-red);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.delete-confirm-btn:hover {
    background: #c82333;
    transform: translateY(-1px);
}

.delete-confirm-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.delete-confirm-btn:disabled {
    background: var(--medium-gray);
    cursor: not-allowed;
    transform: none;
}



.close-btn {
    background: var(--danger-red);
    color: white;
    border: none;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.close-btn:hover {
    background: #c82333;
    transform: scale(1.1);
}

.close-btn:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.modal-body {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

#app-iframe {
    max-width: 100%;
    max-height: 80vh;
    border: none;
    border-radius: 12px;
    background: var(--light-gray);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    margin: 0 auto;
    display: block;
    transform: scale(1);
    transition: all 0.3s ease;
}

/* Mobile device frame simulation */
.iframe-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 400px;
    position: relative;
    transition: all 0.3s ease;
}

.iframe-container::before {
    content: '';
    position: absolute;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
}

/* Device-specific container styles */
.iframe-container.device-iphone::before {
    width: 60px;
    height: 4px;
}

.iframe-container.device-tablet::before {
    width: 80px;
    height: 6px;
}

.iframe-container.device-desktop {
    background: var(--light-gray);
    padding: 1rem;
}

.iframe-container.device-desktop::before {
    display: none;
}

/* Device-specific iframe sizes */
#app-iframe.device-iphone {
    width: 375px; /* iPhone 12/13/14 width */
    height: 667px; /* iPhone 12/13/14 height */
}

#app-iframe.device-tablet {
    width: 768px; /* iPad width */
    height: 1024px; /* iPad height */
}

#app-iframe.device-desktop {
    width: 100%;
    height: 70vh;
    max-width: 1200px;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    #app-iframe.device-iphone {
        width: 320px; /* Smaller mobile width */
        height: 568px; /* iPhone SE height */
    }
    
    #app-iframe.device-tablet {
        width: 600px;
        height: 800px;
    }
    
    .iframe-container {
        padding: 1rem;
    }
}

@media (min-width: 768px) {
    #app-iframe.device-iphone {
        width: 414px; /* iPhone 12/13/14 Pro Max width */
        height: 896px; /* iPhone 12/13/14 Pro Max height */
    }
}

@media (min-width: 1024px) {
    #app-iframe.device-iphone {
        width: 390px; /* iPhone 14 Pro width */
        height: 844px; /* iPhone 14 Pro height */
    }
}

/* FAQ */
.faq-section {
    background: var(--primary-white);
    border-radius: var(--border-radius-lg);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-gray);
}

.faq-section h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--dark-gray);
    font-weight: 700;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-gray);
    transition: var(--transition);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem 0;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--dark-gray);
    transition: var(--transition);
    letter-spacing: 0.01em;
}

.faq-question:hover {
    color: var(--primary-blue);
    background: rgba(0, 123, 255, 0.05);
    padding-left: 1rem;
    padding-right: 1rem;
    border-radius: var(--border-radius);
}

.faq-question:focus {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--border-radius);
}

.faq-icon {
    font-size: 1.5rem;
    transition: var(--transition);
    color: var(--primary-blue);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 0 1.5rem 0;
    color: var(--text-secondary);
    line-height: 1.7;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    font-size: 1rem;
    letter-spacing: 0.01em;
}

.faq-answer.show {
    max-height: 200px;
    padding: 0 1rem 1.5rem 1rem;
}

/* Bottom Navigation */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--primary-white);
    border-top: 1px solid var(--border-gray);
    display: flex;
    justify-content: space-around;
    padding: 0.75rem 0;
    z-index: 100;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #6c757d;
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: var(--border-radius);
    min-width: 60px;
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--primary-blue);
    transition: var(--transition);
}

.nav-item:hover {
    color: var(--primary-blue);
    background: rgba(0, 123, 255, 0.1);
    transform: translateY(-2px);
}

.nav-item:hover::before {
    width: 80%;
}

.nav-item.active {
    color: var(--primary-blue);
    background: rgba(0, 123, 255, 0.1);
}

.nav-item.active::before {
    width: 80%;
}

.nav-item:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.nav-item i {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 1rem;
    color: #6c757d;
    font-size: 0.875rem;
    background: var(--primary-white);
    margin-top: 2rem;
    border-top: 1px solid var(--border-gray);
}

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-gray);
    border-top: 2px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Success/Error Messages */
.message {
    padding: 1.125rem 1.5rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
    font-weight: 500;
    font-size: 1rem;
    border-left: 4px solid;
    animation: slideInFromTop 0.3s ease-out;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
    line-height: 1.5;
}

@keyframes slideInFromTop {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: currentColor;
    opacity: 0.3;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border-color: #28a745;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border-color: #dc3545;
}

.message.warning {
    background: #fff3cd;
    color: #856404;
    border-color: #ffc107;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: #17a2b8;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .app-card:hover,
    .nav-item:hover,
    .submit-btn:hover {
        transform: none;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-blue: #0000ff;
        --success-green: #008000;
        --danger-red: #ff0000;
        --warning-orange: #ff8c00;
        --text-primary: #000000;
        --text-secondary: #333333;
    }
    
    .app-card {
        border: 2px solid var(--dark-gray);
    }
    
    .nav-item.active {
        background: var(--dark-gray);
        color: var(--primary-white);
    }
    
    .message {
        border: 2px solid currentColor;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        border: 2px solid #000000;
    }
    
    .search-box input {
        border: 2px solid #000000;
    }
}

/* Focus visible for better accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.375rem;
        letter-spacing: -0.01em;
    }
    
    .header-controls {
        gap: 0.5rem;
    }
    
    .section-tabs {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .tab-btn {
        text-align: center;
        padding: 0.5rem 1rem;
        font-size: 1rem;
        font-weight: 600;
    }
    
    .server-apps-header {
        padding: 1rem;
    }
    
    .server-apps-header h3 {
        font-size: 1.375rem;
        letter-spacing: -0.01em;
    }
    
    .theme-switch {
        gap: 0.125rem;
        padding: 0.125rem;
    }
    
    .theme-btn {
        min-width: 32px;
        height: 32px;
        font-size: 0.875rem;
        padding: 0.375rem;
    }
    
    .welcome-card,
    .upload-card,
    .feedback-card {
        padding: 1.5rem;
    }
    
    .welcome-card h2,
    .upload-card h2,
    .feedback-card h2 {
        font-size: 1.5rem;
        letter-spacing: -0.01em;
    }
    
    .apps-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .code-input-container {
        flex-direction: column;
    }
    
    .modal-content {
        margin: 0;
        max-height: 100vh;
        border-radius: 0;
    }
    
    #app-iframe {
        height: 60vh;
    }
    
    .feedback-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 0.5rem;
        flex-wrap: wrap;
    }
    
    .delete-feedback-btn {
        order: 3;
        margin-left: auto;
    }
    

    
    .faq-question {
        font-size: 1.125rem;
        padding: 1rem 0;
        letter-spacing: 0.01em;
    }
    
    .faq-answer.show {
        padding: 0 0.5rem 1rem 0.5rem;
        font-size: 1rem;
    }
    
    /* Melhorar legibilidade em mobile */
    body {
        font-size: 16px;
        line-height: 1.6;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px; /* Evita zoom no iOS */
        padding: 0.75rem;
    }
    
    .search-box input {
        font-size: 16px; /* Evita zoom no iOS */
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 0.5rem;
    }
    
    .header-controls {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-end;
    }
    
    .theme-switch {
        order: 2;
    }
    
    .language-switch {
        order: 1;
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .welcome-card,
    .upload-card,
    .feedback-card,
    .faq-section {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .lang-btn {
        padding: 0.25rem 0.5rem;
        font-size: 0.75rem;
    }
    
    .modal {
        padding: 0.5rem;
    }
    
    .modal-header {
        padding: 1rem;
    }
    
    .modal-body {
        padding: 1rem;
    }
    
    .bottom-nav {
        padding: 0.5rem 0;
    }
    
    .nav-item {
        min-width: 50px;
        padding: 0.25rem;
    }
    
    .nav-item i {
        font-size: 1rem;
    }
    
    .nav-item span {
        font-size: 0.7rem;
    }
}

/* Print styles */
@media print {
    .app-header,
    .bottom-nav,
    .modal,
    .search-container,
    .access-code-section {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
        max-width: none;
    }
    
    .content-section {
        display: block !important;
        page-break-inside: avoid;
    }
    
    .app-card,
    .feedback-item {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}