/**
 * Timer Massagem Bebê - Stylesheet
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 */

/* ========================================
   CSS CUSTOM PROPERTIES
   ======================================== */
:root {
    /* Color Palette */
    --color-primary: #7868E6;
    --color-primary-light: #B8B5FF;
    --color-secondary: #E4FBFF;
    --color-accent: #FFB4B4;
    --color-background: #EDEEF7;
    --color-surface: #FFFFFF;
    --color-text: #2D3748;
    --color-text-light: #718096;
    --color-border: #E2E8F0;
    --color-success: #48BB78;
    --color-danger: #F56565;
    --color-warning: #ED8936;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 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: 2rem;
    
    /* 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);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-index */
    --z-base: 1;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-toast: 1050;
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --color-background: #1A202C;
    --color-surface: #2D3748;
    --color-text: #F7FAFC;
    --color-text-light: #A0AEC0;
    --color-border: #4A5568;
}

/* ========================================
   LOGO STYLES
   ======================================== */
.app-logo {
    width: 32px;
    height: 32px;
    object-fit: contain;
    margin-right: var(--spacing-sm);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.loading-logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: var(--spacing-lg);
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    animation: logoPulse 2s ease-in-out infinite;
}

.welcome-logo {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: var(--spacing-md);
    border-radius: 50%;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.1);
}

.footer-logo {
    width: 24px;
    height: 24px;
    object-fit: contain;
    margin-right: var(--spacing-sm);
    border-radius: 50%;
    opacity: 0.8;
}

@keyframes logoPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

/* ========================================
   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);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-background);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Paper Texture Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(
            0deg,
            rgba(0, 0, 0, 0.03) 0px,
            transparent 1px,
            transparent 2px,
            rgba(0, 0, 0, 0.03) 3px
        ),
        repeating-linear-gradient(
            90deg,
            rgba(0, 0, 0, 0.03) 0px,
            transparent 1px,
            transparent 2px,
            rgba(0, 0, 0, 0.03) 3px
        );
    pointer-events: none;
    z-index: 0;
}

/* ========================================
   LOADING SCREEN
   ======================================== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeOut 0.5s ease 1.5s forwards;
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    animation: bounce 1s infinite;
}

.loading-screen h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 600;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 1s linear infinite;
}

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

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

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

/* ========================================
   APP CONTAINER
   ======================================== */
.app-container {
    position: relative;
    min-height: 100vh;
    padding-bottom: 80px;
    z-index: var(--z-base);
}

/* ========================================
   HEADER
   ======================================== */
.app-header {
    position: sticky;
    top: 0;
    background: var(--color-surface);
    box-shadow: var(--shadow-md);
    z-index: var(--z-sticky);
    padding: var(--spacing-md);
}

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

.app-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.title-icon {
    font-size: var(--font-size-2xl);
}

.icon-btn {
    width: 44px;
    height: 44px;
    border: none;
    background: transparent;
    color: var(--color-text);
    font-size: var(--font-size-lg);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.icon-btn:active {
    transform: scale(0.95);
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.content-section {
    display: none;
    animation: fadeInUp 0.3s ease;
}

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

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

/* ========================================
   CARDS
   ======================================== */
.welcome-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.welcome-card h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.welcome-card p {
    font-size: var(--font-size-lg);
    opacity: 0.95;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: transform var(--transition-fast);
}

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

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

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

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ========================================
   REGIONS
   ======================================== */
.regions-container {
    margin-bottom: var(--spacing-xl);
}

.regions-container h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.regions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.region-card {
    background: linear-gradient(135deg, #FFF8F0 0%, #FEF7E0 100%);
    border: 2px solid #FFE4B5;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: 0 4px 12px rgba(255, 192, 203, 0.2);
    position: relative;
    overflow: hidden;
}

.region-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 182, 193, 0.1) 0%, rgba(255, 218, 185, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.region-card:hover {
    border-color: #FFB6C1;
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(255, 192, 203, 0.3);
}

.region-card:hover::before {
    opacity: 1;
}

.region-card:active {
    transform: translateY(-2px);
}

.region-icon {
    position: relative;
    z-index: 2;
    margin-bottom: var(--spacing-sm);
}

.baby-icon {
    font-size: 3rem;
    display: inline-block;
    padding: var(--spacing-sm);
    border-radius: 50%;
    background: linear-gradient(135deg, #FFE4E1 0%, #FFF0F5 100%);
    box-shadow: 0 4px 8px rgba(255, 182, 193, 0.3);
    transition: all var(--transition-base);
    border: 2px solid #FFB6C1;
}

.region-card:hover .baby-icon {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(255, 182, 193, 0.4);
}

/* Cores específicas para cada região */
.legs-icon {
    background: linear-gradient(135deg, #E6F3FF 0%, #F0F8FF 100%);
    border-color: #87CEEB;
    color: #4682B4;
}

.arms-icon {
    background: linear-gradient(135deg, #FFF0F5 0%, #FFE4E1 100%);
    border-color: #FFB6C1;
    color: #FF69B4;
}

.belly-icon {
    background: linear-gradient(135deg, #F0FFF0 0%, #E6FFE6 100%);
    border-color: #98FB98;
    color: #32CD32;
}

.back-icon {
    background: linear-gradient(135deg, #FFF8DC 0%, #FFFACD 100%);
    border-color: #F0E68C;
    color: #DAA520;
}

.face-icon {
    background: linear-gradient(135deg, #FFE4E1 0%, #FFF0F5 100%);
    border-color: #FFB6C1;
    color: #FF1493;
}

.region-card h4 {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    position: relative;
    z-index: 2;
}

.region-time {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 600;
    position: relative;
    z-index: 2;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    min-height: 44px;
}

.btn:active {
    transform: scale(0.98);
}

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

.btn-primary:hover {
    background: #6858d6;
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-secondary);
    color: var(--color-text);
}

.btn-secondary:hover {
    background: #d4ebf0;
}

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

.btn-danger:hover {
    background: #e53e3e;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
    width: 100%;
}

.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Quick Actions */
.quick-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   TIMER SECTION
   ======================================== */
.timer-container {
    max-width: 600px;
    margin: 0 auto;
}

.current-region-info {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.region-icon-large {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.current-region-info h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.current-region-info p {
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
}

/* Timer Display */
.timer-display {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
    width: 100%;
    overflow: hidden;
}

.time-circle {
    position: relative;
    width: 200px;
    height: 200px;
    max-width: 100%;
    max-height: 100%;
}

.progress-ring {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.progress-ring-circle {
    transition: stroke-dashoffset 0.5s ease;
}

.time-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.timer-text {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
}

.timer-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

/* Timer Controls */
.timer-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.timer-controls .btn {
    flex: 1;
}

/* Session Progress */
.session-progress {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.session-progress h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.progress-regions {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.progress-region {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--color-background);
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.progress-region.completed {
    background: var(--color-success);
    color: white;
}

.progress-region.active {
    background: var(--color-primary);
    color: white;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* Technique Guide & Benefits */
.technique-guide,
.benefits-card {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.technique-guide h4,
.benefits-card h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.benefits-card ul {
    list-style: none;
    padding: 0;
}

.benefits-card li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
}

.benefits-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

/* ========================================
   HISTORY SECTION
   ======================================== */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-text);
}

.history-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

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

.history-item {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-primary);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.history-date {
    font-weight: 600;
    color: var(--color-text);
}

.history-duration {
    color: var(--color-primary);
    font-weight: 600;
}

.history-regions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.history-region-tag {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-background);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-light);
}

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

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

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

/* ========================================
   SETTINGS SECTION
   ======================================== */
.settings-group {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.settings-group h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

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

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

.setting-item label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-base);
    color: var(--color-text);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-border);
    transition: var(--transition-base);
    border-radius: var(--radius-full);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: var(--transition-base);
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--color-primary);
}

input:checked + .toggle-slider:before {
    transform: translateX(22px);
}

/* Volume Slider */
.volume-slider {
    width: 120px;
    margin: 0 var(--spacing-sm);
}

.volume-value {
    min-width: 40px;
    text-align: right;
    font-weight: 600;
    color: var(--color-text);
}

/* Time Settings */
.time-settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.time-setting-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.time-setting-item label {
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.time-input {
    padding: var(--spacing-sm);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    text-align: center;
    width: 100%;
}

.time-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Language Select */
.language-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
}

.language-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ========================================
   FAQ SECTION
   ======================================== */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

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

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

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

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

.faq-answer {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-light);
    line-height: 1.7;
}

.faq-answer[hidden] {
    display: none;
}

/* ========================================
   BOTTOM NAVIGATION
   ======================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    z-index: var(--z-fixed);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    color: var(--color-text-light);
    text-decoration: none;
    font-size: var(--font-size-xs);
    transition: all var(--transition-fast);
    min-width: 60px;
    border-radius: var(--radius-md);
}

.nav-item i {
    font-size: var(--font-size-lg);
}

.nav-item:hover {
    background: var(--color-background);
}

.nav-item.active {
    color: var(--color-primary);
    font-weight: 600;
}

/* ========================================
   PRIVACY PAGE
   ======================================== */
.privacy-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.privacy-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.privacy-item h4 {
    color: var(--color-primary);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.privacy-item p {
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.privacy-item ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.privacy-item li {
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: var(--spacing-xs);
}

.privacy-item a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.privacy-item a:hover {
    color: var(--color-primary-light);
    text-decoration: underline;
}

/* ========================================
   FOOTER
   ======================================== */
.app-footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--color-surface);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-direction: column;
}

.footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.privacy-link {
    color: var(--color-text-light);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.privacy-link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

.app-footer p {
    margin-bottom: var(--spacing-xs);
}

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

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

/* ========================================
   TOAST NOTIFICATIONS
   ======================================== */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-toast);
    opacity: 0;
    transition: all var(--transition-base);
    max-width: 90%;
    text-align: center;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

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

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

.toast.warning {
    background: var(--color-warning);
}

/* ========================================
   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(--color-primary);
    outline-offset: 2px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .regions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    /* Timer Section - Tablet Improvements */
    .timer-container {
        max-width: 100%;
        padding: 0 var(--spacing-md);
    }
    
    .current-region-info {
        margin-bottom: var(--spacing-lg);
    }
    
    .region-icon-large {
        font-size: 3.5rem;
    }
    
    .timer-controls {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .timer-controls .btn {
        width: 100%;
    }
    
    /* Progress ring responsivo para tablets */
    .time-circle {
        max-width: 90vw;
        max-height: 90vw;
    }
    
    .progress-ring {
        width: 100%;
        height: 100%;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
}

@media (max-width: 320px) {
    /* Extra small screens */
    .timer-container {
        padding: 0 var(--spacing-xs);
    }
    
    .current-region-info {
        padding: var(--spacing-sm);
    }
    
    .region-icon-large {
        font-size: 2.5rem;
    }
    
    .current-region-info h2 {
        font-size: var(--font-size-lg);
    }
    
    .time-circle {
        width: 120px;
        height: 120px;
        max-width: 80vw;
        max-height: 80vw;
    }
    
    .progress-ring {
        width: 100%;
        height: 100%;
    }
    
    .progress-ring circle {
        r: calc(60px - 4px);
        cx: 60px;
        cy: 60px;
    }
    
    .timer-text {
        font-size: var(--font-size-xl);
    }
    
    .timer-controls .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }
    
    .welcome-card {
        padding: var(--spacing-lg);
    }
    
    .regions-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .region-card {
        padding: var(--spacing-md);
    }
    
    /* Timer Section - Mobile Improvements */
    .timer-container {
        padding: 0 var(--spacing-sm);
    }
    
    .current-region-info {
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-md);
    }
    
    .region-icon-large {
        font-size: 3rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .current-region-info h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-xs);
    }
    
    .current-region-info p {
        font-size: var(--font-size-base);
        line-height: 1.4;
    }
    
    .timer-display {
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-sm);
    }
    
    .time-circle {
        width: 150px;
        height: 150px;
        max-width: 90vw;
        max-height: 90vw;
    }
    
    .progress-ring {
        width: 100%;
        height: 100%;
    }
    
    .progress-ring circle {
        r: calc(75px - 4px);
        cx: 75px;
        cy: 75px;
    }
    
    .timer-text {
        font-size: var(--font-size-2xl);
    }
    
    .timer-controls {
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-lg);
    }
    
    .timer-controls .btn {
        width: 100%;
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    /* Logo responsive adjustments */
    .app-logo {
        width: 28px;
        height: 28px;
    }
    
    .loading-logo {
        width: 60px;
        height: 60px;
    }
    
    .welcome-logo {
        width: 50px;
        height: 50px;
    }
    
    .footer-logo {
        width: 20px;
        height: 20px;
    }
    
    /* Privacy page responsive */
    .privacy-container {
        padding: var(--spacing-md);
    }
    
    .privacy-item {
        padding: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
    }
    
    .privacy-item h4 {
        font-size: var(--font-size-base);
    }
    
    .session-progress {
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-md);
    }
    
    .technique-guide {
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-md);
    }
    
    .benefits-card {
        padding: var(--spacing-md);
    }
}

@media (min-width: 768px) {
    .bottom-nav {
        max-width: 600px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    }
}

@media (min-width: 1024px) {
    .regions-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .bottom-nav,
    .app-header,
    .timer-controls,
    .icon-btn {
        display: none !important;
    }
}