/**
 * Analisador de Domínio - Styles
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ========================================
   CSS Variables (Design System)
   ======================================== */
:root {
    /* Color Palette */
    --color-primary: #833AB4;
    --color-secondary: #FD1D1D;
    --color-accent-1: #F77737;
    --color-accent-2: #FCAF45;
    --color-accent-3: #FFDC80;
    
    /* Gradient */
    --gradient-primary: linear-gradient(135deg, #833AB4 0%, #FD1D1D 50%, #F77737 100%);
    --gradient-secondary: linear-gradient(135deg, #FCAF45 0%, #FFDC80 100%);
    
    /* Neutral Colors */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;
    
    /* Semantic Colors */
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-bottom: 5rem;
}

main {
    flex: 1;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-secondary);
}

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

/* ========================================
   Container & Layout
   ======================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* ========================================
   Header
   ======================================== */
.app-header {
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

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

.logo {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-image {
    height: 64px;
    width: auto;
    display: block;
}

.logo-text {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.2;
    font-size: var(--font-size-2xl);
}

/* ========================================
   Bottom Navigation
   ======================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: #ffffff;
    border-radius: 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    padding: var(--spacing-sm) 0;
    display: grid !important;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    z-index: 9999;
    width: 100%;
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(131, 58, 180, 0.1);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: var(--color-gray-500);
    font-size: var(--font-size-xs);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color var(--transition-fast), transform var(--transition-fast);
    padding: var(--spacing-xs) var(--spacing-sm);
    min-width: 64px;
    text-align: center;
    height: 100%;
}

.bottom-nav-item i {
    font-size: var(--font-size-xl);
    line-height: 1;
}

.bottom-nav-item:hover,
.bottom-nav-item:focus-visible {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.bottom-nav-item:focus-visible {
    outline: none;
}

.logo i {
    font-size: var(--font-size-3xl);
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    font-weight: 700;
}

.hero-subtitle {
    font-size: var(--font-size-sm);
    opacity: 0.95;
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.4;
}

@media (max-width: 768px) {
    .hero-section {
        padding: var(--spacing-md) 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-xs);
    }
}

/* ========================================
   Search Section
   ======================================== */
.search-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-gray-50);
}

.search-form {
    max-width: 600px;
    margin: 0 auto;
}

.search-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
}

.search-icon {
    display: none;
}

.search-input {
    width: 100%;
    border: 2px solid var(--color-gray-200);
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-primary);
}

.search-input::placeholder {
    color: var(--color-gray-400);
}

.search-button {
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-weight: 700;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.search-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.search-button:active {
    transform: translateY(0);
}

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

.search-hint {
    text-align: center;
    margin-top: var(--spacing-sm);
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.error-message {
    background-color: var(--color-error);
    color: var(--color-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    display: none;
    text-align: center;
    font-weight: 500;
}

.error-message.show {
    display: block;
    animation: slideDown 0.3s ease-out;
}

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

@media (max-width: 768px) {
    .search-section {
        padding: var(--spacing-lg) 0;
    }
    
    .search-input {
        font-size: var(--font-size-sm);
    }
    
    .search-button {
        font-size: var(--font-size-sm);
    }
}

/* ========================================
   Loading Section
   ======================================== */
.loading-section {
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    max-width: 600px;
    margin: 0 auto;
}

/* Loading Icon */
.loading-icon-wrapper {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(131, 58, 180, 0.3);
    margin-bottom: var(--spacing-md);
}

.loading-icon {
    font-size: 3rem;
    color: white;
    animation: spinPulse 2s linear infinite;
}

/* Loading Text */
.loading-text {
    text-align: center;
}

.loading-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.loading-message {
    font-size: var(--font-size-base);
    color: var(--color-gray-600);
    margin: 0;
    animation: fadeInOut 2s ease-in-out infinite;
}

/* Cache Indicator */
.cache-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--color-success);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-top: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* Loading Steps */
.loading-steps {
    width: 100%;
    max-width: 500px;
    margin-top: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.loading-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    opacity: 0.4;
}

.loading-step.active {
    opacity: 1;
    box-shadow: var(--shadow-md);
    background: linear-gradient(to right, var(--color-gray-50), var(--color-white));
    border-left: 4px solid var(--color-primary);
}

.loading-step.completed {
    opacity: 0.8;
    border-left: 4px solid var(--color-success);
}

.step-icon {
    font-size: var(--font-size-xl);
    color: var(--color-gray-400);
    min-width: 24px;
}

.loading-step.active .step-icon {
    color: var(--color-primary);
}

.loading-step.completed .step-icon {
    color: var(--color-success);
}

.step-text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-700);
    font-weight: 500;
    text-align: left;
}

.loading-step.active .step-text {
    color: var(--color-gray-900);
    font-weight: 600;
}

/* Animations */
@keyframes spinPulse {
    0% {
        transform: rotate(0deg) scale(1);
    }
    50% {
        transform: rotate(180deg) scale(1.1);
    }
    100% {
        transform: rotate(360deg) scale(1);
    }
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
}

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

/* ========================================
   Results Section
   ======================================== */
.results-section {
    padding: var(--spacing-2xl) 0;
}

.results-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.results-title {
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

.results-domain {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    font-weight: 600;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

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

/* ========================================
   Result Cards
   ======================================== */
.result-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-gray-100);
}

.card-icon {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
}

.card-title {
    font-size: var(--font-size-lg);
    margin: 0;
    color: var(--color-gray-800);
}

.card-body {
    margin-bottom: var(--spacing-lg);
}

.card-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.card-detail {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.card-footer {
    display: flex;
    justify-content: flex-start;
}

.card-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
}

.card-badge.success {
    background-color: var(--color-success);
    color: var(--color-white);
}

.card-badge.warning {
    background-color: var(--color-warning);
    color: var(--color-white);
}

.card-badge.error {
    background-color: var(--color-error);
    color: var(--color-white);
}

/* WHOIS Info */
.whois-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.whois-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-gray-100);
}

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

.whois-label {
    font-weight: 600;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
}

.whois-value {
    color: var(--color-gray-900);
    font-size: var(--font-size-sm);
    text-align: right;
}

/* SEO Metrics */
.seo-metrics {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.metric-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.metric-label {
    font-weight: 500;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
}

.metric-value {
    font-weight: 600;
    color: var(--color-gray-900);
    font-size: var(--font-size-base);
}

/* SSL Status */
.ssl-status {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.ssl-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
}

.ssl-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.ssl-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.ssl-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-gray-100);
}

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

.ssl-label {
    font-weight: 600;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
}

.ssl-value {
    color: var(--color-gray-900);
    font-size: var(--font-size-sm);
    text-align: right;
}

/* ========================================
   Action Buttons
   ======================================== */
.results-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.action-button {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    min-width: 160px;
    justify-content: center;
}

.action-button.primary {
    background: var(--gradient-primary);
    color: var(--color-white);
}

.action-button.secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.action-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.action-button:active {
    transform: translateY(0);
}

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

/* ========================================
   History Section
   ======================================== */
.history-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-white);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: 0;
}

.history-actions-group {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.cache-stats-btn {
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    position: relative;
}

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

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

.cache-count {
    background: rgba(255, 255, 255, 0.3);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    min-width: 24px;
    text-align: center;
}

.clear-history-btn {
    background: var(--color-error);
    color: var(--color-white);
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.clear-history-btn:hover {
    background-color: #DC2626;
    transform: translateY(-2px);
}

.clear-history-btn:focus-visible {
    outline: 2px solid var(--color-error);
    outline-offset: 2px;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.history-item:hover {
    background: var(--color-gray-100);
    transform: translateX(4px);
}

.history-info {
    flex: 1;
}

.history-domain {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-xs);
}

.history-date {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.history-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.history-btn {
    background: transparent;
    border: none;
    color: var(--color-gray-600);
    font-size: var(--font-size-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.history-btn:hover {
    background: var(--color-gray-200);
    color: var(--color-primary);
}

.history-btn.delete:hover {
    color: var(--color-error);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-md);
    color: var(--color-gray-500);
}

.empty-state i {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.empty-state-hint {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-50);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-fast);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    background: transparent;
    border: none;
    padding: var(--spacing-lg);
    text-align: left;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-900);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--color-gray-50);
}

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

.faq-icon {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    transition: transform var(--transition-base);
    font-weight: 300;
}

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

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-gray-700);
    line-height: 1.7;
    animation: fadeIn 0.3s ease-out;
}

.faq-answer p {
    margin-bottom: var(--spacing-md);
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-answer strong {
    color: var(--color-gray-900);
    font-weight: 600;
}

.faq-answer a {
    color: var(--color-primary);
    font-weight: 600;
}

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

/* ========================================
   Footer
   ======================================== */
.app-footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0;
    margin-top: auto;
}

.footer-content {
    text-align: center;
}

.footer-text {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-sm);
}

.b20-link {
    color: var(--color-accent-2);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    display: inline-block;
}

.b20-link:hover {
    color: var(--color-accent-3);
    transform: scale(1.05);
}

.footer-link a {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-link a:hover {
    color: var(--color-white);
}

/* ========================================
   Toast Notification
   ======================================== */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: var(--spacing-lg);
    min-width: 300px;
    max-width: 400px;
    z-index: var(--z-tooltip);
    transform: translateY(calc(100% + var(--spacing-xl)));
    transition: transform var(--transition-base);
}

.toast.show {
    transform: translateY(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toast-icon {
    font-size: var(--font-size-xl);
}

.toast.success .toast-icon {
    color: var(--color-success);
}

.toast.error .toast-icon {
    color: var(--color-error);
}

.toast.info .toast-icon {
    color: var(--color-info);
}

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
    color: var(--color-gray-900);
}

/* ========================================
   Utility Classes
   ======================================== */
.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;
}

[hidden] {
    display: none !important;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }
    
    .bottom-nav-item {
        font-size: 0.7rem;
        letter-spacing: 0.02em;
        padding: var(--spacing-sm) var(--spacing-xs);
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .results-actions {
        flex-direction: column;
    }
    
    .action-button {
        width: 100%;
    }
    
    .section-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .history-actions-group {
        width: 100%;
        justify-content: space-between;
    }
    
    .cache-stats-btn {
        flex: 0 0 auto;
    }

    .clear-history-btn {
        flex: 1;
        justify-content: center;
    }
    
    .history-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .history-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        min-width: auto;
        bottom: calc(5rem + var(--spacing-md));
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo {
        font-size: var(--font-size-xl);
    }
    
    .logo-image {
        height: 48px;
    }
    
    .logo-text {
        font-size: var(--font-size-lg);
    }
    
    .bottom-nav-item i {
        font-size: var(--font-size-lg);
    }
    
    .bottom-nav-item span {
        font-size: 0.65rem;
        letter-spacing: 0.01em;
    }
}

@media (max-width: 360px) {
    .bottom-nav-item span {
        display: none;
    }
    
    .bottom-nav-item {
        padding: var(--spacing-xs);
    }
    
    .bottom-nav-item i {
        font-size: var(--font-size-base);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .app-header,
    .search-section,
    .history-section,
    .faq-section,
    .app-footer,
    .results-actions,
    .toast {
        display: none !important;
    }
    
    .results-section {
        padding: 0;
    }
    
    .result-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--color-gray-300);
    }
}