/**
 * ReportaAI - Sistema de Relatórios Inteligentes
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ===== CSS VARIABLES ===== */
:root {
    /* Paleta Microsoft Modern - NÃO ALTERE! */
    --primary-color: #0078D4;
    --secondary-color: #00A4EF;
    --accent-color: #7FBA00;
    --surface-color: #FFB900;
    --text-color: #F25022;
    
    /* Variações automáticas */
    --primary-hover: #005a9e;
    --primary-light: #e6f3ff;
    --bg-success-light: #e8f5e9;
    --bg-warning-light: #fff3e0;
    --bg-danger-light: #ffebee;
    --bg-color: #ffffff;
    --bg-secondary: #f5f5f5;
    --text-primary: #212121;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    
    /* Layout */
    --border-radius: 16px;
    --border-radius-sm: 10px;
    --spacing-unit: 8px;
    --container-padding: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --header-height: 64px;
    --bottom-nav-height: 72px;
    
    /* Status Colors */
    --status-pending: #FFB900;
    --status-in-progress: #00A4EF;
    --status-completed: #7FBA00;
    --status-blocked: #F25022;
    --bg-color-rgb: 255, 255, 255;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-color: #121212;
        --bg-secondary: #1e1e1e;
        --text-primary: #ffffff;
        --text-secondary: #b3b3b3;
        --text-muted: #808080;
        --border-color: #333333;
        --primary-light: #002d50;
        --bg-success-light: #1b2e1b;
        --bg-warning-light: #2e241b;
        --bg-danger-light: #2e1b1b;
        --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
        --bg-color-rgb: 18, 18, 18;
    }
}

[data-theme="dark"] {
    --bg-color: #121212;
    --bg-secondary: #1e1e1e;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #808080;
    --border-color: #333333;
    --primary-light: #002d50;
    --bg-success-light: #1b2e1b;
    --bg-warning-light: #2e241b;
    --bg-danger-light: #2e1b1b;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --bg-color-rgb: 18, 18, 18;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: clamp(14px, 2.5vw, 16px);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg-color);
    transition: background-color 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    padding-top: var(--header-height);
    padding-bottom: var(--bottom-nav-height);
    transition: background-color 0.3s ease, color 0.3s ease;
}

@media (min-width: 768px) {
    body {
        padding-bottom: 0;
    }
}

/* ===== HEADER FIXO ===== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(var(--bg-color-rgb, 255, 255, 255), 0.8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: 0 1px 0 0 var(--border-color);
    z-index: 1000;
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    transition: var(--transition);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--primary-color);
}

.header-logo i {
    font-size: 24px;
}

.header-logo h1 {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
        gap: 8px;
    }
    
    .desktop-nav .nav-link {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 8px 16px;
        border-radius: var(--border-radius-sm);
        color: var(--text-secondary);
        text-decoration: none;
        transition: var(--transition);
        font-weight: 500;
    }
    
    .desktop-nav .nav-link i {
        font-size: 18px;
    }
    
    .desktop-nav .nav-link:hover {
        background: var(--primary-light);
        color: var(--primary-color);
    }
    
    .desktop-nav .nav-link.active {
        background: var(--primary-color);
        color: white;
    }
}

.header-actions {
    display: flex;
    gap: 8px;
}

/* ===== BOTTOM NAVIGATION (MOBILE) ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--bg-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom, 0);
    transition: var(--transition);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 8px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 12px;
    transition: var(--transition);
    flex: 1;
    min-height: var(--bottom-nav-height);
    font-weight: 500;
    position: relative;
}

.nav-item::before {
    content: '';
    position: absolute;
    width: 65px;
    height: 65px;
    background: var(--primary-light);
    border-radius: 50%;
    opacity: 0;
    transform: scale(0.5);
    transition: var(--transition);
    z-index: -1;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item.active::before {
    opacity: 1;
    transform: scale(1);
}

.nav-item i {
    font-size: 22px;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.nav-item.active i {
    transform: translateY(-2px);
}

@media (min-width: 768px) {
    .bottom-nav {
        display: none !important;
    }
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-height: 48px;
    font-family: inherit;
    white-space: nowrap;
    user-select: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(0, 120, 212, 0.39);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 120, 212, 0.23);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 120, 212, 0.2);
}

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

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--status-blocked);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(242, 80, 34, 0.39);
}

.btn-danger:hover {
    background: #d43f1a;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(242, 80, 34, 0.23);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
    min-height: 36px;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
}

.btn-icon:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

/* ===== CONTAINER ===== */
.container {
    padding: var(--container-padding);
    max-width: 100%;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .container {
        padding: 32px;
        max-width: 800px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 1000px;
    }
}

@media (min-width: 1440px) {
    .container {
        max-width: 1280px;
    }
}

/* ===== SECTIONS ===== */
.section {
    display: none;
    min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height));
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding-bottom: 40px;
}

.section.active {
    display: block;
}

@media (min-width: 768px) {
    .section {
        min-height: calc(100vh - var(--header-height));
    }
}

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

.section-header {
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* ===== METRICS GRID (BENTO STYLE) ===== */
.metrics-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

/* Tablet: 2 colunas (2x2) */
@media (min-width: 640px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* Desktop: 4 colunas (4x1) */
@media (min-width: 1024px) {
    .metrics-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.metric-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    min-height: 110px;
}

/* Removemos o span diferenciado para manter a coerência visual perfeita no grid */
.metric-card-large {
    grid-column: auto;
}

.metric-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: transparent;
    transition: var(--transition);
}

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

.metric-card:hover::after {
    background: var(--primary-color);
}

.metric-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
    transition: var(--transition);
}

.metric-card:hover .metric-icon {
    transform: scale(1.1);
}

.metric-content {
    flex: 1;
}

.metric-value {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1.1;
    margin-bottom: 2px;
}

.metric-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
    white-space: nowrap;
}

/* ===== CHARTS ===== */
.dashboard-charts {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

@media (min-width: 1024px) {
    .dashboard-charts {
        grid-template-columns: repeat(2, 1fr);
    }
}

.chart-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.chart-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.chart-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.chart-card canvas {
    max-height: 350px;
    width: 100% !important;
}

/* ===== ACTIVITIES LIST ===== */
.activities-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.activity-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.activity-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.activity-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}

.activity-status {
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.status-pending {
    background: #fff8e1;
    color: #f57f17;
}

.status-in-progress {
    background: #e3f2fd;
    color: #1565c0;
}

.status-completed {
    background: #e8f5e9;
    color: #2e7d32;
}

.status-blocked {
    background: #ffebee;
    color: #c62828;
}

.activity-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 12px;
    line-height: 1.5;
}

.activity-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.activity-meta i {
    margin-right: 4px;
}

.activity-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.activity-actions button {
    flex: 1;
}

/* ===== FILTERS ===== */
.filters-bar {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 16px;
    margin-bottom: 24px;
}

.search-box {
    position: relative;
    margin-bottom: 12px;
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-primary);
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.filter-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
}

@media (min-width: 768px) {
    .filter-group {
        grid-template-columns: repeat(4, 1fr);
    }
}

.filter-group select,
.filter-group input[type="date"] {
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-primary);
    min-height: 44px;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    transition: var(--transition);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 16px;
    background: var(--bg-color);
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
    appearance: none;
    -webkit-appearance: none;
}

.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px var(--primary-light);
    transform: translateY(-1px);
}

.form-group input:focus + label,
.form-group textarea:focus + label {
    color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    padding: 16px;
    overflow-y: auto;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-color);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 600px;
    max-height: 95vh;
    overflow-y: auto;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: slideUp 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

@media (max-width: 576px) {
    .modal {
        padding: 0;
    }
    
    .modal-content {
        max-height: 100vh;
        border-radius: 0;
        height: 100%;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background: var(--bg-color);
    z-index: 10;
}

.modal-header h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
}

.modal form {
    padding: 32px;
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.modal-actions button {
    flex: 1;
}

/* ===== TOAST ===== */
.toast {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + 16px);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 12px 24px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 3000;
    max-width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

@media (min-width: 768px) {
    .toast {
        bottom: 24px;
    }
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i {
    font-size: 64px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ===== SETTINGS ===== */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

@media (min-width: 768px) {
    .settings-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.settings-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
}

.settings-card h3 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.card-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 20px;
}

.status-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 16px;
}

.status-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

.data-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
}

.stat-label {
    font-weight: 600;
    color: var(--text-secondary);
}

.stat-value {
    font-weight: 700;
    color: var(--primary-color);
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* ===== REPORTS ===== */
.report-filters-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
}

.report-filters-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.report-filters-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

@media (min-width: 768px) {
    .report-filters-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.report-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.report-preview-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-bottom: 24px;
}

.report-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.saved-reports-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media (min-width: 768px) {
    .saved-reports-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===== FAQ ===== */
.faq-section {
    margin-top: 48px;
    padding-top: 48px;
    border-top: 2px solid var(--border-color);
}

.faq-section h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.faq-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: transparent;
    border: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-icon {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

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

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-answer:not([hidden]) {
    padding: 0 20px 16px;
    max-height: 500px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== FOOTER ===== */
.app-footer {
    text-align: center;
    padding: 32px 16px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 48px;
}

.app-footer p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.b20-link {
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.b20-link:hover {
    text-decoration: underline;
    transform: scale(1.05);
}

/* ===== LOADING ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 4000;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== SKELETON LOADING ===== */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--border-radius-sm);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ===== ACCESSIBILITY ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== RESPONSIVE UTILITIES ===== */
@media (max-width: 767px) {
    .hide-mobile {
        display: none !important;
    }
}

@media (min-width: 768px) {
    .hide-desktop {
        display: none !important;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .app-header,
    .bottom-nav,
    .btn,
    .filters-bar {
        display: none !important;
    }
    
    body {
        padding: 0;
    }
    
    .section {
        display: block !important;
    }
}