/**
 * Método Pomodoro Focus - Styles
 * Desenvolvido por B20 Conteúdo Digital
 * https://www.b20.com.br
 * 
 * Design: Clean & Minimal + Streaming + Health & Wellness
 * Palette: Onyx & Obsidian
 */

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

/* ===== CSS VARIABLES ===== */
:root {
    /* Palette: Onyx & Obsidian */
    --primary-color: #000000;
    --secondary-color: #1C1C1C;
    --accent-color: #2F2F2F;
    --surface-color: #404040;
    --text-color: #525252;
    
    /* Extended palette */
    --primary-hover: #1a1a1a;
    --primary-light: rgba(0, 0, 0, 0.1);
    --bg-color: #ffffff;
    --bg-secondary: #f8f9fa;
    --text-muted: #6c757d;
    --text-light: #adb5bd;
    --border-color: #e9ecef;
    
    /* Status colors */
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    
    /* Priority colors */
    --priority-low: #10b981;
    --priority-medium: #f59e0b;
    --priority-high: #ef4444;
    
    /* Timer colors */
    --timer-pomodoro: #ef4444;
    --timer-short-break: #10b981;
    --timer-long-break: #3b82f6;
    
    /* Layout */
    --header-height: 60px;
    --bottom-nav-height: 65px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --spacing-unit: 8px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
    
    /* Font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}



/* ===== BASE STYLES ===== */
html {
    font-size: clamp(14px, 2.5vw, 16px);
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding-top: var(--header-height);
    padding-bottom: calc(var(--bottom-nav-height) + 20px);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition), color var(--transition);
}

@media (min-width: 768px) {
    body {
        padding-bottom: 20px;
    }
}

/* Safe areas for iPhone */
@supports (padding: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom) + 20px);
    }
    
    @media (min-width: 768px) {
        body {
            padding-bottom: calc(20px + env(safe-area-inset-bottom));
        }
    }
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--primary-color);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

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

a:hover {
    text-decoration: underline;
}

/* ===== HEADER ===== */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    box-shadow: var(--shadow);
    z-index: 1000;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background-color var(--transition), box-shadow var(--transition);
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-logo i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.header-logo h1 {
    font-size: 1.125rem;
    font-weight: 700;
    margin: 0;
}

.header-logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 6px;
}

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

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
        gap: 4px;
    }
    
    .desktop-nav .nav-link {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 8px 14px;
        border-radius: var(--border-radius-sm);
        color: var(--text-muted);
        font-size: 0.875rem;
        font-weight: 500;
        text-decoration: none;
        transition: all var(--transition-fast);
    }
    
    .desktop-nav .nav-link:hover {
        background: var(--primary-light);
        color: var(--primary-color);
    }
    
    .desktop-nav .nav-link.active {
        color: var(--primary-color);
        font-weight: 600;
        position: relative;
    }
    
    .desktop-nav .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 16px;
        height: 2px;
        background: var(--primary-color);
        border-radius: 1px;
    }
    .desktop-nav .nav-link i {
        font-size: 1rem;
    }
}

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

/* ===== BOTTOM NAVIGATION ===== */
.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: background-color var(--transition);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 8px 12px;
    min-width: 64px;
    min-height: 48px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.6875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-item i {
    font-size: 1.25rem;
    transition: transform var(--transition-fast);
}

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

.nav-item.active i {
    transform: scale(1.1);
}

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

/* ===== MAIN CONTENT ===== */
.main-content {
    min-height: calc(100vh - var(--header-height) - var(--bottom-nav-height));
}

.container {
    width: 100%;
    max-width: 100%;
    padding: 16px;
    margin: 0 auto;
    overflow-x: hidden;
}

@media (min-width: 768px) {
    .container {
        max-width: 720px;
        padding: 24px;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 960px;
    }
}

/* ===== SECTIONS ===== */
.section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.section.active {
    display: block;
}

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

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
    overflow: hidden;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.375rem;
    margin: 0;
}

.section-header h2 i {
    font-size: 1.25rem;
    opacity: 0.8;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 48px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.8125rem;
    min-height: 36px;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.0625rem;
    min-height: 56px;
}

.btn-icon-only {
    width: 48px;
    height: 48px;
    padding: 0;
    border-radius: 50%;
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

.btn-icon i {
    font-size: 1.125rem;
}

/* ===== TIMER SECTION ===== */
.timer-modes {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-secondary);
    border: 2px solid transparent;
    border-radius: var(--border-radius-lg);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.mode-btn.active {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
}

.mode-btn[data-mode="pomodoro"].active {
    background: var(--timer-pomodoro);
    border-color: var(--timer-pomodoro);
}

.mode-btn[data-mode="shortBreak"].active {
    background: var(--timer-short-break);
    border-color: var(--timer-short-break);
}

.mode-btn[data-mode="longBreak"].active {
    background: var(--timer-long-break);
    border-color: var(--timer-long-break);
}

/* Timer Container */
.timer-container {
    display: flex;
    justify-content: center;
    margin-bottom: 32px;
}

.timer-ring {
    position: relative;
    width: 280px;
    height: 280px;
}

@media (min-width: 768px) {
    .timer-ring {
        width: 320px;
        height: 320px;
    }
}

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

.timer-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 8;
}

.timer-progress {
    fill: none;
    stroke: var(--timer-pomodoro);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 565.48;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke var(--transition);
}

.timer-progress.short-break {
    stroke: var(--timer-short-break);
}

.timer-progress.long-break {
    stroke: var(--timer-long-break);
}

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

.timer-time {
    display: block;
    font-size: 4rem;
    font-weight: 700;
    color: var(--primary-color);
    font-variant-numeric: tabular-nums;
    line-height: 1;
}

@media (min-width: 768px) {
    .timer-time {
        font-size: 4.5rem;
    }
}

.timer-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 8px;
}

/* Timer Controls */
.timer-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

#btn-start {
    min-width: 160px;
}

#btn-start.running {
    background: var(--danger-color);
}

#btn-start.running:hover {
    background: #dc2626;
}

/* Current Task Card */
.current-task-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 16px 20px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    transition: border-color var(--transition);
}

.current-task-card:has(.task-info) {
    border-left: 3px solid var(--timer-pomodoro);
}

.current-task-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.current-task-content {
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 500;
}

.current-task-content .empty-task-prompt {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
    font-weight: 400;
    font-size: 0.875rem;
    padding: 4px 0;
}

.current-task-content .empty-task-prompt i {
    color: var(--text-light);
    font-size: 0.875rem;
    animation: pointBounce 2s ease-in-out infinite;
}

@keyframes pointBounce {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(4px); }
}

.current-task-content .empty-task-prompt strong {
    color: var(--primary-color);
    font-weight: 600;
}

.current-task-content .empty-task {
    color: var(--text-muted);
    font-style: italic;
    font-weight: 400;
    margin: 0;
}

.current-task-content .task-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.current-task-content .task-title {
    flex: 1;
    margin: 0;
}

.current-task-content .task-pomodoros {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Session Counter */
.session-counter {
    text-align: center;
}

.session-progress-bar {
    position: relative;
    margin-bottom: 12px;
    padding: 0 8px;
}

.session-progress-track {
    position: absolute;
    top: 50%;
    left: 8px;
    right: 8px;
    height: 3px;
    background: var(--border-color);
    border-radius: 2px;
    transform: translateY(-50%);
    z-index: 0;
}

.session-progress-fill {
    height: 100%;
    background: var(--timer-pomodoro);
    border-radius: 2px;
    width: 0%;
    transition: width var(--transition);
}

.session-dots {
    display: flex;
    justify-content: space-between;
    position: relative;
    z-index: 1;
}

.session-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    transition: all var(--transition);
    display: block;
}

.session-dot.completed {
    background: var(--timer-pomodoro);
    border-color: var(--timer-pomodoro);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
}

.session-text {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin: 0;
    font-weight: 500;
}

/* ===== TASKS SECTION ===== */
.task-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
}

.filter-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

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

.filter-btn.active {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
}

/* Task List */
.task-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.task-item.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.task-item.completed {
    opacity: 0.6;
}

.task-item.completed .task-title {
    text-decoration: line-through;
}

.task-checkbox {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    margin-top: 2px;
}

.task-checkbox:hover {
    border-color: var(--primary-color);
}

.task-checkbox.checked {
    background: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

.task-checkbox i {
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.task-checkbox.checked i {
    opacity: 1;
}

.task-content {
    flex: 1;
    min-width: 0;
}

.task-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 4px;
}

.task-title {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-color);
    margin: 0;
    word-break: break-word;
}

.task-priority {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: 500;
}

.task-priority.low {
    background: rgba(16, 185, 129, 0.1);
    color: var(--priority-low);
}

.task-priority.medium {
    background: rgba(245, 158, 11, 0.1);
    color: var(--priority-medium);
}

.task-priority.high {
    background: rgba(239, 68, 68, 0.1);
    color: var(--priority-high);
}

.task-description {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0 0 8px 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.75rem;
    color: var(--text-light);
}

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

.task-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.task-action-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.task-action-btn:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

.task-action-btn.delete:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}



/* ===== STATS SECTION ===== */
.stats-period-selector {
    display: flex;
    gap: 4px;
}

.period-btn {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.period-btn:hover {
    background: var(--primary-light);
}

.period-btn.active {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

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

.stat-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    min-width: 0;
    overflow: hidden;
}

.stat-card-primary {
    background: var(--primary-color);
    border-color: var(--primary-color);
    grid-column: span 2;
}

@media (min-width: 768px) {
    .stat-card-primary {
        grid-column: span 1;
    }
}

.stat-card-primary .stat-icon,
.stat-card-primary .stat-content {
    color: var(--bg-color);
}

.stat-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--border-radius-sm);
    flex-shrink: 0;
}

@media (min-width: 768px) {
    .stat-card {
        padding: 16px;
        gap: 12px;
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
    }
}

.stat-card-primary .stat-icon {
    background: rgba(255, 255, 255, 0.2);
}

.stat-icon i {
    font-size: 1.125rem;
    color: var(--primary-color);
}

.stat-card-primary .stat-icon i {
    color: var(--bg-color);
}

.stat-content {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.stat-card-primary .stat-value {
    color: var(--bg-color);
}

.stat-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (min-width: 768px) {
    .stat-label {
        font-size: 0.75rem;
    }
}

.stat-card-primary .stat-label {
    color: rgba(255, 255, 255, 0.8);
}

/* Chart Card */
.chart-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.chart-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    margin-bottom: 16px;
}

.chart-container {
    height: 200px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 4px;
    padding-top: 20px;
    overflow: hidden;
}

@media (min-width: 768px) {
    .chart-container {
        gap: 8px;
    }
}

.chart-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    height: 100%;
}

.chart-bar {
    width: 100%;
    max-width: 40px;
    background: var(--primary-light);
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    transition: height var(--transition);
    min-height: 4px;
}

.chart-bar.has-value {
    background: var(--primary-color);
}

.chart-label {
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.chart-value {
    font-size: 0.6875rem;
    color: var(--text-color);
    font-weight: 600;
}

/* Activity Card */
.activity-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    border: 1px solid var(--border-color);
}

.activity-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    margin-bottom: 16px;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-color);
    border-radius: var(--border-radius-sm);
}

.activity-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: 50%;
    flex-shrink: 0;
}

.activity-icon i {
    font-size: 0.875rem;
    color: var(--primary-color);
}

.activity-icon.session {
    background: rgba(239, 68, 68, 0.1);
}

.activity-icon.session i {
    color: var(--timer-pomodoro);
}

.activity-icon.task {
    background: rgba(16, 185, 129, 0.1);
}

.activity-icon.task i {
    color: var(--success-color);
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
    margin: 0;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== SETTINGS SECTION ===== */
.settings-group {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.settings-group h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.setting-info {
    flex: 1;
    min-width: 0;
}

.setting-label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 2px;
}

.setting-description {
    display: block;
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.setting-control {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.setting-value {
    min-width: 32px;
    text-align: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.setting-unit {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.btn-adjust {
    width: 32px;
    height: 32px;
    padding: 0;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.btn-adjust:hover {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
}

.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(--border-color);
    border-radius: 28px;
    transition: var(--transition);
}

.toggle-slider::before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

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

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

/* About Content */
.about-content {
    font-size: 0.9375rem;
    color: var(--text-color);
}

.about-content p {
    margin-bottom: 8px;
}

.about-content p:last-child {
    margin-bottom: 0;
}

.about-credits {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

/* ===== FAQ SECTION ===== */
.faq-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 16px;
    background: transparent;
    border: none;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-color);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.faq-question span {
    flex: 1;
}

.faq-icon {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: transform var(--transition);
}

.faq-item.open .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 16px 16px;
    font-size: 0.9375rem;
    color: var(--text-muted);
    line-height: 1.7;
}

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

.faq-answer p {
    margin: 0;
}

/* ===== MODALS ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.modal.open {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    background: var(--bg-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-small {
    max-width: 360px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.125rem;
    margin: 0;
}

.btn-close {
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-color);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    outline: none;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.form-error {
    display: block;
    font-size: 0.8125rem;
    color: var(--danger-color);
    margin-top: 4px;
}

/* Pomodoro Selector */
.pomodoro-selector {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pomodoro-selector input {
    width: 60px;
    text-align: center;
    font-weight: 600;
}

/* Priority Selector */
.priority-selector {
    display: flex;
    gap: 8px;
}

.priority-btn {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.priority-btn:hover {
    background: var(--primary-light);
}

.priority-btn.active {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.priority-btn[data-priority="low"].active {
    border-color: var(--priority-low);
    color: var(--priority-low);
    background: rgba(16, 185, 129, 0.1);
}

.priority-btn[data-priority="medium"].active {
    border-color: var(--priority-medium);
    color: var(--priority-medium);
    background: rgba(245, 158, 11, 0.1);
}

.priority-btn[data-priority="high"].active {
    border-color: var(--priority-high);
    color: var(--priority-high);
    background: rgba(239, 68, 68, 0.1);
}

/* ===== EMPTY STATES ===== */
.empty-state-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 40px 24px;
    background: var(--bg-secondary);
    border: 1px dashed var(--border-color);
    border-radius: var(--border-radius-lg);
    text-align: center;
}

@media (min-width: 768px) {
    .empty-state-card {
        flex-direction: row;
        text-align: left;
        padding: 40px 48px;
        gap: 40px;
    }
}

.empty-state-illustration {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.empty-state-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--timer-pomodoro) 0%, #f97316 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.25);
    animation: emptyFloat 3s ease-in-out infinite;
}

.empty-state-circle i {
    font-size: 2rem;
    color: white;
}

@keyframes emptyFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.empty-state-dots {
    display: flex;
    gap: 6px;
}

.empty-state-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--border-color);
    animation: dotPulse 1.5s ease-in-out infinite;
}

.empty-state-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.empty-state-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes dotPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.3); }
}

.empty-state-body {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

@media (min-width: 768px) {
    .empty-state-body {
        align-items: flex-start;
    }
}

.empty-state-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.empty-state-body p {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin: 0 0 8px 0;
    line-height: 1.5;
    max-width: 320px;
}

.empty-state-body .btn {
    align-self: center;
}

@media (min-width: 768px) {
    .empty-state-body .btn {
        align-self: flex-start;
    }
}

/* Small empty states (activity, etc.) */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}

.empty-state.small {
    padding: 24px;
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state.small i {
    font-size: 2rem;
    margin-bottom: 12px;
}

.empty-state h3 {
    font-size: 1.125rem;
    color: var(--text-color);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 0.9375rem;
    margin-bottom: 20px;
}

.empty-state.small p {
    margin-bottom: 0;
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + 16px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

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

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: var(--primary-color);
    color: var(--bg-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    font-size: 0.9375rem;
    font-weight: 500;
    pointer-events: auto;
    animation: toastSlideIn 0.3s ease;
}

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

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

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

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

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

.toast.hiding {
    animation: toastSlideOut 0.3s ease forwards;
}

@keyframes toastSlideOut {
    to {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* ===== FOOTER ===== */
.app-footer {
    text-align: center;
    padding: 24px 16px;
    margin-top: 40px;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.app-footer p {
    margin-bottom: 4px;
}

.app-footer p:last-child {
    margin-bottom: 0;
}

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

.b20-link:hover {
    text-decoration: underline;
}

/* ===== UTILITIES ===== */
.hidden {
    display: none !important;
}

.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;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--border-color) 25%, var(--bg-secondary) 50%, var(--border-color) 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; }
}

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

/* Selection */
::selection {
    background: var(--primary-color);
    color: var(--bg-color);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* Print Styles */
@media print {
    .app-header,
    .bottom-nav,
    .modal,
    .toast-container {
        display: none !important;
    }
    
    body {
        padding: 0;
    }
    
    .section {
        display: block !important;
        page-break-inside: avoid;
    }
}