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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-weight: 400;
    line-height: 1.6;
    overflow-x: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== CSS CUSTOM PROPERTIES (THEMES) ===== */

/* Light Theme */
.theme-light {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --accent-primary: #3b82f6;
    --accent-secondary: #1d4ed8;
    --accent-tertiary: #dbeafe;
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --shadow-light: rgba(15, 23, 42, 0.05);
    --shadow-medium: rgba(15, 23, 42, 0.1);
    --shadow-heavy: rgba(15, 23, 42, 0.25);
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --focus-ring: rgba(59, 130, 246, 0.5);
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(255, 255, 255, 0.2);
}

/* Dark Theme */
.theme-dark {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --accent-primary: #60a5fa;
    --accent-secondary: #3b82f6;
    --accent-tertiary: #1e3a8a;
    --border-primary: #334155;
    --border-secondary: #475569;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.2);
    --shadow-heavy: rgba(0, 0, 0, 0.4);
    --success: #34d399;
    --warning: #fbbf24;
    --error: #f87171;
    --focus-ring: rgba(96, 165, 250, 0.5);
    --gradient-primary: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    --glass-bg: rgba(15, 23, 42, 0.8);
    --glass-border: rgba(255, 255, 255, 0.1);
}

/* Warm Theme */
.theme-warm {
    --bg-primary: #fefcfb;
    --bg-secondary: #fef7f0;
    --bg-tertiary: #fed7aa;
    --text-primary: #431407;
    --text-secondary: #9a3412;
    --text-tertiary: #c2410c;
    --accent-primary: #ea580c;
    --accent-secondary: #c2410c;
    --accent-tertiary: #fed7aa;
    --border-primary: #fed7aa;
    --border-secondary: #fdba74;
    --shadow-light: rgba(194, 65, 12, 0.05);
    --shadow-medium: rgba(194, 65, 12, 0.1);
    --shadow-heavy: rgba(194, 65, 12, 0.25);
    --success: #16a34a;
    --warning: #d97706;
    --error: #dc2626;
    --focus-ring: rgba(234, 88, 12, 0.5);
    --gradient-primary: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
    --glass-bg: rgba(254, 252, 251, 0.8);
    --glass-border: rgba(234, 88, 12, 0.2);
}

/* Cool Theme */
.theme-cool {
    --bg-primary: #f0fdf4;
    --bg-secondary: #dcfce7;
    --bg-tertiary: #bbf7d0;
    --text-primary: #14532d;
    --text-secondary: #166534;
    --text-tertiary: #15803d;
    --accent-primary: #16a34a;
    --accent-secondary: #15803d;
    --accent-tertiary: #bbf7d0;
    --border-primary: #bbf7d0;
    --border-secondary: #86efac;
    --shadow-light: rgba(21, 128, 61, 0.05);
    --shadow-medium: rgba(21, 128, 61, 0.1);
    --shadow-heavy: rgba(21, 128, 61, 0.25);
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --focus-ring: rgba(22, 163, 74, 0.5);
    --gradient-primary: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
    --glass-bg: rgba(240, 253, 244, 0.8);
    --glass-border: rgba(22, 163, 74, 0.2);
}

/* ===== GLOBAL STYLES ===== */
body {
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100svh; /* Small viewport height for mobile Safari */
}

/* ===== HEADER ===== */
.header {
    padding: 0.75rem 2rem;
    padding-top: calc(0.75rem + env(safe-area-inset-top));
    padding-left: calc(2rem + env(safe-area-inset-left));
    padding-right: calc(2rem + env(safe-area-inset-right));
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-primary);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-controls {
    display: flex;
    gap: 0.75rem;
}

.btn-icon {
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 1rem;
}

.btn-icon:hover {
    background: var(--accent-tertiary);
    color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.btn-icon:active {
    transform: translateY(0);
}

/* ===== MAIN CONTAINER ===== */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    padding-left: calc(2rem + env(safe-area-inset-left));
    padding-right: calc(2rem + env(safe-area-inset-right));
    padding-bottom: calc(2rem + env(safe-area-inset-bottom));
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ===== TIMER SECTION ===== */
.timer-section {
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: visible;
    padding-bottom: 1.5rem;
}

.timer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.timer-circle {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    margin: 1rem;
    width: 300px;
    height: 300px;
    max-width: 90vw;
    max-height: 90vw;
}

.progress-ring {
    transform: rotate(-90deg);
    filter: drop-shadow(0 8px 24px var(--shadow-light));
    width: 100%;
    height: 100%;
    max-width: 300px;
    max-height: 300px;
}

.progress-ring-background {
    stroke: var(--border-primary);
    opacity: 0.3;
}

.progress-ring-progress {
    stroke: var(--accent-primary);
    stroke-dasharray: 879.646; /* 2 * π * r = 2 * π * 140 */
    stroke-dashoffset: 879.646;
    transition: stroke-dashoffset 1s cubic-bezier(0.4, 0, 0.2, 1);
    filter: drop-shadow(0 0 8px var(--accent-primary));
}

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

.time-text {
    font-size: 3.5rem;
    font-weight: 300;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
    margin-bottom: 0.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.session-type {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.session-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* ===== TIMER CONTROLS ===== */
.timer-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn-control {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 1rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.btn-control::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

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

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 16px var(--shadow-medium);
    min-width: 120px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--shadow-heavy);
}

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

.btn-secondary:hover {
    background: var(--accent-tertiary);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.btn-control:active {
    transform: translateY(0);
}

.btn-control .btn-icon {
    width: auto;
    height: auto;
    background: none;
    font-size: 1.2rem;
    font-weight: 600;
}

/* Enhanced visibility for primary button icons */
.btn-primary .btn-icon {
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    font-size: 1.3rem;
    font-weight: 700;
}

/* ===== SESSION INFO ===== */
.session-info {
    display: flex;
    justify-content: center;
}

.session-notes {
    width: 100%;
    max-width: 500px;
}

.note-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.note-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.75rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    resize: vertical;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.note-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
    background: var(--bg-primary);
}

.note-input::placeholder {
    color: var(--text-tertiary);
}

/* ===== TASKS SECTION ===== */
.tasks-section {
    background: var(--bg-secondary);
    border-radius: 1.5rem;
    padding: 2rem;
    border: 1px solid var(--border-primary);
    margin-bottom: 2rem;
}

.task-input-container {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.task-input {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.75rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.task-input::placeholder {
    color: var(--text-tertiary);
}

.btn-add-task {
    padding: 0.875rem 1rem;
    border: none;
    border-radius: 0.75rem;
    background: var(--gradient-primary);
    color: white;
    font-family: inherit;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 50px;
}

.btn-add-task:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow-light);
}



/* Ensure add button styling takes priority */
.btn-add-task {
    background: var(--gradient-primary) !important;
    color: white !important;
    border: none !important;
    width: auto !important;
    height: auto !important;
}

/* Add task button icon styling */
.btn-add-task .add-icon {
    color: white;
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1;
    display: inline-block;
}

.task-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.task-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding:0.25rem 1rem ;
    background: var(--bg-primary);
    border-radius: 0.75rem;
    border: 1px solid var(--border-primary);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    position: relative;
}

.task-drag-handle {
    color: var(--text-tertiary);
    font-size: 1rem;
    cursor: grab;
    padding: 0.25rem;
    margin-left: -0.25rem;
    border-radius: 0.25rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    opacity: 0;
    transform: translateX(-8px);
}

.task-item:hover .task-drag-handle {
    opacity: 1;
    transform: translateX(0);
}

.task-drag-handle:hover {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.task-drag-handle:active {
    cursor: grabbing;
}

.task-item.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
    z-index: 1000;
    box-shadow: 0 8px 32px var(--shadow-heavy);
}

.task-item.drag-over {
    border-color: var(--accent-primary);
    background: var(--accent-tertiary);
    transform: translateY(-2px);
}

.task-list.dragging-active .task-item:not(.dragging) {
    transition: transform 0.2s ease;
}

.task-item.drag-placeholder {
    opacity: 0.3;
    border: 2px dashed var(--accent-primary);
    background: transparent;
}

.task-item:hover {
    border-color: var(--accent-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px var(--shadow-light);
}

.task-item.completed {
    opacity: 0.6;
    background: var(--bg-tertiary);
}

.task-item.current {
    border-color: var(--accent-primary);
    background: var(--accent-tertiary);
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.task-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-primary);
    border-radius: 0.25rem;
    background: var(--bg-secondary);
    position: relative;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    flex-shrink: 0;
}

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

.task-checkbox.checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

.task-text {
    flex: 1;
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
    cursor: text;
    border-radius: 0.25rem;
    padding: 0.125rem 0.25rem;
    margin: -0.125rem -0.25rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
    border: none;
}

.task-text:hover {
    background: var(--bg-tertiary);
}

.task-text.editing {
    background: var(--bg-secondary);
    border-radius: 0.375rem;
}

.task-item.completed .task-text {
    text-decoration: line-through;
    color: var(--text-tertiary);
}

.task-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.task-item:hover .task-actions {
    opacity: 1;
}

.task-action-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.task-action-btn.current-btn {
    background: var(--accent-primary);
    color: white;
}

.task-action-btn.current-btn:hover {
    background: var(--accent-secondary);
}

.current-task {
    padding: 1rem;
    margin-bottom: 1.5rem;
    background: var(--bg-primary);
    border-radius: 0.75rem;
    border: 2px solid var(--accent-primary);
    background: linear-gradient(135deg, var(--accent-tertiary) 0%, var(--bg-primary) 100%);
}

.current-task-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.current-task-text {
    font-size: 1rem;
    color: var(--accent-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Session notes within current task */
.current-task .session-notes {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-primary);
    max-width: none;
    width: 100%;
}

.current-task .note-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.current-task .note-input {
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid var(--border-primary);
    font-size: 0.8rem;
}

.task-list:empty::after {
    content: "No tasks yet. Add a task above to get started!";
    display: block;
    padding: 2rem;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-style: italic;
    background: var(--bg-primary);
    border-radius: 0.75rem;
    border: 2px dashed var(--border-primary);
}

.task-toggle-container {
    text-align: center;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-primary);
}

.task-toggle-link {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
}

.task-toggle-link:hover {
    color: var(--text-secondary);
    background: var(--bg-tertiary);
}

/* ===== INSIGHTS SECTION ===== */
.insights-section {
    background: var(--bg-secondary);
    border-radius: 1.5rem;
    padding: 2rem;
    border: 1px solid var(--border-primary);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.insights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.insight-card {
    background: var(--bg-primary);
    border-radius: 1rem;
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--border-primary);
    /* Removed hover effects since cards are not clickable */
}

.insight-number {
    font-size: 2rem;
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.insight-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===== ACHIEVEMENTS ===== */
.achievements {
    text-align: center;
}

.achievements-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.achievement-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.achievement-badge {
    background: var(--gradient-primary);
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px var(--shadow-light);
    animation: achievementPop 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    cursor: help;
    position: relative;
}

.achievement-badge.new {
    animation: achievementPulse 2s infinite;
}

/* Custom tooltip styling for faster, better UX */
.achievement-badge[data-tooltip]:hover::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    font-size: 0.75rem;
    font-weight: 400;
    white-space: nowrap;
    box-shadow: 0 4px 12px var(--shadow-light);
    border: 1px solid var(--border-primary);
    z-index: 1000;
    animation: tooltipFadeIn 0.15s ease-out;
    pointer-events: none;
}

.achievement-badge[data-tooltip]:hover::after {
    content: '';
    position: absolute;
    bottom: calc(100% + 2px);
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid var(--bg-primary);
    z-index: 1001;
    animation: tooltipFadeIn 0.15s ease-out;
    pointer-events: none;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(2px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}



@keyframes achievementPop {
    0% { transform: scale(0) rotate(180deg); opacity: 0; }
    100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

@keyframes achievementPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); box-shadow: 0 6px 20px var(--shadow-medium); }
}

/* ===== ZEN MODE ===== */
.zen-mode .header-controls > *:not(.zen-toggle) {
    display: none;
}

.zen-mode .logo {
    opacity: 0.5;
    font-size: 1.25rem;
}

.zen-mode .tasks-section,
.zen-mode .insights-section {
    display: none;
}

.zen-mode .main-container {
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - var(--header-height));
}

.zen-mode .timer-section {
    padding: 0;
    flex: none;
}

.zen-mode .session-count {
    opacity: 0.6;
    font-size: 0.875rem;
}

.zen-mode .timer-controls {
    margin-top: 2rem;
}

.zen-mode .timer-controls .btn-icon {
    opacity: 0.8;
}

.zen-mode .timer-controls .btn-icon:hover {
    opacity: 1;
}

/* Zen mode transitions */
.zen-mode * {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Hide notification banner in zen mode */
.zen-mode .notification-banner {
    display: none !important;
}

/* ===== HELP PANEL ===== */
.help-panel {
    position: fixed;
    top: 0;
    left: -500px;
    width: 500px;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile Safari */
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-right: 1px solid var(--border-primary);
    z-index: 200;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.help-panel.active {
    left: 0;
}

.help-content {
    padding: 2rem;
    padding-left: calc(2rem + env(safe-area-inset-left));
    padding-right: calc(2rem + env(safe-area-inset-right));
    padding-bottom: calc(2rem + env(safe-area-inset-bottom));
}

.help-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-primary);
}

.help-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-help {
    width: 2rem;
    height: 2rem;
    font-size: 1.25rem;
}

.help-sections {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.help-section {
    background: var(--bg-primary);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-primary);
}

.help-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.help-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.help-section p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.help-section ul,
.help-section ol {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-left: 1.25rem;
    margin-bottom: 1rem;
}

.help-section li {
    margin-bottom: 0.5rem;
}

.help-section li strong {
    color: var(--text-primary);
    font-weight: 600;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: 0.5rem;
    border: 1px solid var(--border-primary);
}

.shortcut-item kbd {
    padding: 0.25rem 0.5rem;
    background: var(--accent-tertiary);
    color: var(--accent-primary);
    border-radius: 0.25rem;
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.75rem;
    font-weight: 600;
    min-width: 2rem;
    text-align: center;
}

.shortcut-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===== SETTINGS PANEL ===== */
.settings-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile Safari */
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-left: 1px solid var(--border-primary);
    z-index: 200;
    transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.settings-panel.active {
    right: 0;
}

.settings-content {
    padding: 2rem;
    padding-left: calc(2rem + env(safe-area-inset-left));
    padding-right: calc(2rem + env(safe-area-inset-right));
    padding-bottom: calc(2rem + env(safe-area-inset-bottom));
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-primary);
}

.settings-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.close-settings {
    width: 2rem;
    height: 2rem;
    font-size: 1.25rem;
}

.settings-sections {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.settings-section {
    background: var(--bg-primary);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 1px solid var(--border-primary);
}

.settings-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.setting-item {
    margin-bottom: 1.5rem;
}

.setting-item:last-child {
    margin-bottom: 0;
}

.setting-item label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.time-input-group {
    display: flex;
    gap: 0.5rem;
}

.time-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.time-input-wrapper input {
    width: 120px;
    padding: 0.75rem 2.5rem 0.75rem 0.75rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    font-variant-numeric: tabular-nums;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.time-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

.time-unit {
    position: absolute;
    right: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    pointer-events: none;
}

.sound-select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.5rem;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.sound-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

.volume-slider {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border-primary);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow-light);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px var(--shadow-medium);
}

.volume-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-primary);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px var(--shadow-light);
}

.volume-value {
    display: inline-block;
    margin-left: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.checkbox-label {
    display: flex !important;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-primary);
    border-radius: 0.25rem;
    background: var(--bg-secondary);
    position: relative;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ===== THEME OPTIONS ===== */
.theme-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.theme-option {
    padding: 1rem;
    border: 2px solid var(--border-primary);
    border-radius: 0.75rem;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.theme-option:hover {
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.theme-option.active {
    border-color: var(--accent-primary);
    background: var(--accent-tertiary);
}

.theme-preview {
    width: 40px;
    height: 24px;
    border-radius: 0.375rem;
    border: 1px solid rgba(0,0,0,0.1);
}

.theme-preview-light {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.theme-preview-dark {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.theme-preview-warm {
    background: linear-gradient(135deg, #fefcfb 0%, #fed7aa 100%);
}

.theme-preview-cool {
    background: linear-gradient(135deg, #f0fdf4 0%, #bbf7d0 100%);
}

.theme-option span {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ===== OVERLAY ===== */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 150;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ===== NOTIFICATION BANNER ===== */
.notification-banner {
    position: fixed;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 2rem);
    max-width: 720px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-primary);
    border-radius: 1rem;
    box-shadow: 0 8px 32px var(--shadow-heavy);
    z-index: 300;
    transition: top 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.notification-banner.show {
    top: 1rem;
}

.banner-content {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.banner-text {
    font-size: 0.875rem;
    color: var(--text-primary);
    flex: 1;
}

.banner-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-banner {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.btn-banner-primary:hover {
    background: var(--accent-secondary);
    transform: translateY(-1px);
}

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

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

/* ===== ANIMATIONS ===== */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.pulse {
    animation: pulse 2s infinite;
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% { transform: translateY(0); }
    40%, 43% { transform: translateY(-8px); }
    70% { transform: translateY(-4px); }
    90% { transform: translateY(-2px); }
}

.bounce {
    animation: bounce 2s infinite;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .main-container {
        padding: 1rem;
        gap: 2rem;
    }

    .header {
        padding: 1rem;
    }

    .logo {
        font-size: 1.25rem;
    }

    .timer-circle {
        padding: 0.5rem;
        margin: 0.5rem;
        width: 250px;
        height: 250px;
    }



    .time-text {
        font-size: 2.5rem;
    }

    .session-type {
        font-size: 1rem;
    }

    .timer-controls {
        flex-direction: column;
        gap: 0.75rem;
        width: 100%;
        max-width: 280px;
    }

    .btn-control {
        width: 100%;
        justify-content: center;
    }

    .insights-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .insight-card {
        padding: 1rem;
    }

    .insight-number {
        font-size: 1.5rem;
    }

    .help-panel {
        width: 100%;
        left: -100%;
    }

    .help-content {
        padding: 1.5rem;
    }

    .shortcuts-grid {
        grid-template-columns: 1fr;
    }

    .settings-panel {
        width: 100%;
        right: -100%;
    }

    .notification-banner {
        width: calc(100% - 1rem);
        max-width: none;
    }

    .notification-banner.show {
        top: 2rem;
    }

    .banner-content {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .banner-actions {
        justify-content: center;
    }

    .theme-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .timer-circle {
        padding: 0.25rem;
        margin: 0.25rem;
        width: 200px;
        height: 200px;
    }



    .time-text {
        font-size: 2rem;
    }

    .insights-grid {
        grid-template-columns: 1fr;
    }

    .achievement-badges {
        flex-direction: column;
        align-items: center;
    }

    .task-input-container {
        flex-direction: column;
        gap: 0.5rem;
    }

    .btn-add-task {
        align-self: stretch;
    }

    .task-actions {
        opacity: 1; /* Always show on mobile */
    }

    .task-drag-handle {
        opacity: 1; /* Always show drag handle on mobile */
        transform: translateX(0);
    }

    .notification-banner.show {
        top: 2rem;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus states for keyboard navigation */
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .btn-control {
        border: 2px solid currentColor;
    }

    .progress-ring-progress {
        stroke-width: 10;
    }
}

/* ===== MOBILE SAFARI FIXES ===== */
@supports (-webkit-touch-callout: none) {
    /* Mobile Safari specific fixes */
    body {
        /* Prevent rubber band scrolling */
        overscroll-behavior: none;
        /* Fix touch scrolling */
        -webkit-overflow-scrolling: touch;
    }

    /* Fix viewport height issues on iOS */
    .help-panel,
    .settings-panel {
        height: -webkit-fill-available;
    }
}

/* Additional mobile touch improvements */
@media (hover: none) and (pointer: coarse) {
    /* Touch device optimizations */
    .btn-control,
    .btn-icon,
    .task-item {
        /* Larger touch targets on mobile */
        min-height: 44px;
    }

    /* Prevent zoom on inputs */
    input[type="text"],
    input[type="number"],
    textarea,
    select {
        font-size: 16px;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .header-controls,
    .timer-controls,
    .settings-panel,
    .help-panel,
    .overlay,
    .notification-banner {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }
}