:root {
    /* Colors */
    --bg-color: #121212;
    --surface-color: #1E1E1E;
    --surface-color-hover: #2C2C2C;
    --primary-color: #BB86FC; /* Material Purple 200 */
    --primary-variant: #3700B3;
    --secondary-color: #03DAC6; /* Teal 200 */
    --error-color: #CF6679;
    
    /* Text */
    --text-primary: rgba(255, 255, 255, 0.87);
    --text-secondary: rgba(255, 255, 255, 0.60);
    --text-disabled: rgba(255, 255, 255, 0.38);
    
    /* Layout */
    --border-radius: 8px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: system-ui, -apple-system, 'Segoe UI', Arial, sans-serif;
    line-height: 1.5;
}

.material-icons {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25em;
    min-width: 1.25em;
    height: 1.25em;
    font-family: system-ui, -apple-system, 'Segoe UI Symbol', 'Segoe UI Emoji', Arial, sans-serif;
    font-size: 1.25em;
    font-style: normal;
    font-weight: 400;
    line-height: 1;
    text-transform: none;
    vertical-align: -0.15em;
}

/* App Bar */
.app-bar {
    background-color: var(--surface-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-bar h1 {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
}

.app-navigation {
    display: flex;
    align-items: center;
    gap: 2px;
}

.icon-btn.nav-menu-toggle {
    display: none;
}

/* Buttons */
.icon-btn {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.icon-btn:hover, .icon-btn.active {
    background-color: rgba(255, 255, 255, 0.08);
}

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

.btn {
    padding: 10px 16px;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-transform: uppercase;
    transition: background-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background-color: #d1b1ff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.btn-icon-small {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    border-radius: 50%;
    transition: background-color 0.2s, color 0.2s;
}

.btn-icon-small:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

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

.delete-food-btn:hover {
    background-color: rgba(207, 102, 121, 0.1);
    color: var(--error-color);
}

.fab {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background-color: var(--primary-color);
    color: #000;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
    transition: transform 0.2s, box-shadow 0.2s;
    z-index: 90;
}

.fab:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.5);
}

/* Views */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: 80px; /* Space for FAB */
}

/* View Header */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.view-header h2 {
    font-size: 1.5rem;
    font-weight: 400;
}

/* Cards */
.card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
}

.card-content {
    padding: var(--spacing-md) var(--spacing-lg);
    transition: opacity 0.3s ease;
}

.card-content.disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* Summary View */
.meal-summary {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--spacing-sm) 0;
}

.summary-details {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.meal-icon {
    font-size: 32px;
    color: var(--primary-color);
    opacity: 0.8;
}

.summary-text {
    font-size: 0.95rem;
    color: var(--text-primary);
    line-height: 1.6;
    white-space: pre-wrap; /* Allows line breaks if needed */
}

.daily-date-heading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 0;
}

.daily-labels-container {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
    min-height: 16px;
}

.daily-vitality-trends {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    justify-content: center;
    max-width: min(520px, 70vw);
}

.daily-food-mood {
    display: flex;
    justify-content: center;
    min-height: 24px;
}

.vitality-trend-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    padding: 3px 8px;
    color: var(--text-secondary);
    font-size: 0.72rem;
    line-height: 1;
    background-color: rgba(255, 255, 255, 0.04);
}

.vitality-trend-chip .material-icons {
    font-size: 14px;
}

.food-mood-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid rgba(255, 202, 40, 0.45);
    border-radius: 999px;
    padding: 4px 10px;
    color: #ffd54f;
    font-size: 0.78rem;
    line-height: 1;
    background-color: rgba(255, 202, 40, 0.08);
}

.food-mood-chip-label {
    color: var(--text-primary);
    font-weight: 700;
}

.food-mood-chip-value {
    color: var(--text-secondary);
}

.vitality-trend-chip.increasing {
    border-color: rgba(255, 183, 77, 0.5);
    color: #ffcc80;
}

.vitality-trend-chip.increasing.high {
    border-color: rgba(244, 67, 54, 0.55);
    color: #ef9a9a;
}

.vitality-trend-chip.decreasing {
    border-color: rgba(255, 183, 77, 0.5);
    color: #ffcc80;
}

.vitality-trend-chip.neutral {
    border-color: rgba(76, 175, 80, 0.5);
    color: #9bd59e;
}

.vitality-trend-label {
    font-weight: 700;
    color: var(--text-primary);
}

.vitality-trends-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.vitality-trend-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.vitality-trend-row:last-child {
    border-bottom: 0;
}

.vitality-trend-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    min-width: 0;
}

.vitality-trend-title {
    color: var(--text-primary);
    font-weight: 500;
}

.vitality-trend-meta {
    color: var(--text-secondary);
    font-size: 0.82rem;
    margin-top: 2px;
}

.summary-food-labels {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 3px;
    margin-left: 10px;
    vertical-align: middle;
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.flex-1 {
    flex: 1;
}

.add-food-form {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.add-food-form .btn {
    height: 48px; /* Match input height */
    margin-bottom: var(--spacing-md); /* Align with inputs */
}

.material-input {
    width: 100%;
    padding: 12px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
}

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

.select-wrapper {
    position: relative;
    width: 100%;
}

.material-select {
    width: 100%;
    padding: 12px 36px 12px 12px;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
    appearance: none;
    outline: none;
    transition: border-color 0.2s;
}

.select-arrow {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.material-select:focus {
    border-color: var(--primary-color);
}

.material-select:focus + .select-arrow {
    color: var(--primary-color);
}

.material-select option {
    background-color: var(--surface-color);
    color: var(--text-primary);
}

/* Collapsible Group (using details/summary) */
.collapsible-group {
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 4px;
    transition: border-color 0.2s;
}

.collapsible-group:focus-within {
    border-color: var(--primary-color);
}

.collapsible-group summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 1rem;
    list-style: none; /* Hide default arrow */
    user-select: none;
    transition: background-color 0.2s;
}

.collapsible-group summary::-webkit-details-marker {
    display: none; /* Hide default arrow in WebKit */
}

.collapsible-group summary:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.collapsible-group[open] summary {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--primary-color);
}

.collapsible-group .expand-icon {
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.collapsible-group[open] summary .expand-icon {
    color: var(--primary-color);
    transform: rotate(180deg);
}

.collapsible-group .checkbox-group {
    padding: 12px;
}

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

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    color: var(--text-primary);
    padding: 4px 0;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 12px;
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.food-mood-group {
    margin-top: var(--spacing-sm);
    display: grid;
    grid-template-columns: auto minmax(220px, 1fr);
    gap: var(--spacing-sm) var(--spacing-md);
    align-items: start;
}

.food-mood-group > label {
    grid-column: 1 / -1;
}

.food-mood-rating {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 6px 8px;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 4px;
}

.food-mood-rating label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    margin: 0;
    cursor: pointer;
}

.food-mood-rating input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.food-mood-rating span {
    color: rgba(255, 255, 255, 0.38);
    font-size: 1.35rem;
    line-height: 1;
    transition: color 0.15s ease, transform 0.15s ease;
}

.food-mood-rating label.is-active span,
.food-mood-rating label:hover span {
    color: #ffd54f;
}

.food-mood-rating label:hover span {
    transform: translateY(-1px);
}

.food-mood-rating .clear-food-mood {
    margin-left: 6px;
    color: var(--text-secondary);
}

.food-mood-note {
    min-height: 46px;
    resize: vertical;
}

.summary-food-mood {
    color: #ffd54f;
    font-weight: 700;
}

.summary-food-mood-note {
    display: block;
    margin-top: 2px;
    color: var(--text-secondary);
    font-style: italic;
}

.mood-filter-bar {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    flex-wrap: wrap;
}

.mood-filter-bar .form-group {
    margin-bottom: 0;
}

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

.mood-note-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--spacing-md);
    align-items: start;
    padding: var(--spacing-md);
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.mood-note-main {
    min-width: 0;
}

.mood-note-title {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    align-items: center;
    margin-bottom: 4px;
    color: var(--text-primary);
    font-weight: 700;
}

.mood-note-meta,
.mood-note-foods {
    color: var(--text-secondary);
    font-size: 0.86rem;
}

.mood-note-text {
    margin-top: var(--spacing-sm);
    color: var(--text-primary);
    overflow-wrap: anywhere;
}

.mood-note-rating {
    color: #ffd54f;
    white-space: nowrap;
}

.coffee-entry-editor {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.coffee-time-field {
    width: 140px;
}

.coffee-entry-editor .btn {
    min-height: 46px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
    margin-bottom: var(--spacing-md);
}

.coffee-entry-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.coffee-entry-row {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}

.coffee-entry-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
}

.coffee-entry-main .select-wrapper {
    flex: 1;
}

.coffee-entry-main .material-input {
    width: 120px;
}

.coffee-entry-details {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    width: 100%;
}

.coffee-entry-details .food-mood-rating {
    margin: 0;
    padding: 2px 4px;
}

.coffee-entry-details .clear-coffee-rating {
    margin-left: 4px;
    color: var(--text-secondary);
}

.coffee-entry-details .material-input {
    flex: 1;
    min-width: 120px;
}

.coffee-empty-state {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: var(--spacing-sm) 0;
}

/* Toggle Switch */
.toggle {
    display: flex;
    align-items: center;
    cursor: pointer;
}

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

.slider {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 14px;
    background-color: rgba(255, 255, 255, 0.38);
    border-radius: 14px;
    transition: .4s;
    margin-right: 8px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: -2px;
    bottom: -3px;
    background-color: var(--surface-color-hover);
    border-radius: 50%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    transition: .4s;
}

input:checked + .slider {
    background-color: rgba(187, 134, 252, 0.5); /* Primary with opacity */
}

input:checked + .slider:before {
    transform: translateX(20px);
    background-color: var(--primary-color);
}

.toggle-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Material List (Settings View) */
.material-list {
    list-style: none;
    margin: 0;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
}

.material-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.material-list li:last-child {
    border-bottom: none;
}

.material-list li:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.settings-list-sections {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.settings-list-section {
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    overflow: hidden;
}

.settings-list-section summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    cursor: pointer;
    list-style: none;
    user-select: none;
    transition: background-color 0.2s;
}

.settings-list-section summary::-webkit-details-marker {
    display: none;
}

.settings-list-section summary:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.settings-list-section[open] summary {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--primary-color);
}

.settings-list-section .settings-list-title {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    font-weight: 500;
}

.settings-list-count {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
    white-space: nowrap;
}

.settings-list-section .expand-icon {
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.settings-list-section[open] .expand-icon {
    color: var(--primary-color);
    transform: rotate(180deg);
}

.settings-list-section .material-list {
    border: 0;
    border-radius: 0;
}

.list-item-content {
    display: flex;
    flex-direction: column;
}

.list-item-title {
    font-size: 1rem;
    color: var(--text-primary);
}

.list-item-subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: capitalize;
}

/* Calendar View */
.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    text-align: center;
}

.calendar-header-day {
    font-weight: 500;
    color: var(--text-secondary);
    padding-bottom: 8px;
    font-size: 0.9rem;
}

.calendar-day {
    aspect-ratio: 1 / 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.04);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    user-select: none;
    position: relative;
}

.calendar-day:hover:not(.empty) {
    background-color: rgba(255, 255, 255, 0.12);
    transform: scale(1.05);
}

.calendar-day.empty {
    background-color: transparent;
    cursor: default;
}

.calendar-day.today {
    border: 1px solid var(--primary-color);
}

.calendar-day.has-log::after {
    content: '';
    position: absolute;
    bottom: 8px;
    width: 6px;
    height: 6px;
    background-color: var(--secondary-color);
    border-radius: 50%;
}

/* Search View */
.search-result-card {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

.search-result-card:hover {
    background-color: var(--surface-color-hover);
}

.search-result-date {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-color);
}

.search-result-details {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Statistics View */
.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.stat-value {
    font-weight: 500;
    color: var(--text-primary);
}

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

.distribution-range-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

#btn-dist-next-top,
.btn-dist-next-granular {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

#btn-dist-next-top:disabled,
.btn-dist-next-granular:disabled {
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-disabled);
    cursor: default;
    box-shadow: none;
}

.distribution-chart-group {
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.distribution-chart-group:first-child {
    margin-top: 0;
    border-top: none;
    padding-top: 0;
}

.distribution-chart-group canvas + canvas {
    margin-top: var(--spacing-lg);
}

#distribution-results canvas {
    display: block;
    max-width: 100%;
}

.chart-unavailable-message {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: var(--spacing-sm);
}

.download-fallback {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.04);
}

.download-fallback-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.download-fallback-actions .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.download-fallback-note {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

#download-fallback-content {
    min-height: 180px;
    resize: vertical;
    font-family: monospace;
    font-size: 0.85rem;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: var(--spacing-lg);
}

.modal-content {
    background-color: var(--bg-color);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.list-item-ingredients {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.group-label {
    display: inline-block;
    background-color: var(--error-color);
    color: #ffffff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 12px;
    line-height: 1;
}

.calendar-labels-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    justify-content: center;
    margin-top: 4px;
    width: 100%;
}

/* === Markdown Content (Help Section) === */
.markdown-content {
    line-height: 1.6;
}

.markdown-content h2, 
.markdown-content h3, 
.markdown-content h4 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.markdown-content h2:first-child,
.markdown-content h3:first-child {
    margin-top: 0;
}

.markdown-content ul {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.markdown-content li {
    margin-bottom: 4px;
}

.markdown-content code {
    background-color: var(--surface-color);
    padding: 2px 4px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.9em;
}

.markdown-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.markdown-content a:hover {
    text-decoration: underline;
}

.markdown-content p {
    margin-bottom: var(--spacing-md);
}

/* === Collapsible Cards === */
.collapsible-header {
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.2s;
}

.collapsible-header:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.collapsible-header .expand-icon {
    transition: transform 0.3s ease;
}

.collapsible-card.expanded .expand-icon {
    transform: rotate(180deg);
}

@media (max-width: 720px) {
    .app-bar {
        padding: 10px var(--spacing-md);
    }

    .app-bar h1 {
        font-size: 1.1rem;
    }

    .icon-btn.nav-menu-toggle {
        display: inline-flex;
        position: relative;
        z-index: 121;
    }

    .app-navigation {
        position: absolute;
        top: calc(100% + 8px);
        right: var(--spacing-md);
        display: none;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 6px;
        padding: 8px;
        width: min(320px, calc(100vw - 24px));
        background-color: var(--surface-color);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: var(--border-radius);
        box-shadow: 0 10px 24px rgba(0, 0, 0, 0.45);
        z-index: 120;
    }

    .app-bar.nav-open .app-navigation {
        display: grid;
    }

    .app-navigation .icon-btn {
        width: 100%;
        height: 44px;
        justify-content: flex-start;
        gap: 8px;
        border-radius: 6px;
        padding: 0 10px;
        color: var(--text-secondary);
    }

    .app-navigation .icon-btn.active {
        color: var(--primary-color);
        background-color: rgba(187, 134, 252, 0.1);
    }

    .app-navigation .icon-btn::after {
        content: attr(title);
        color: currentColor;
        font-size: 0.82rem;
        line-height: 1;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .container {
        width: 100%;
        padding: 12px;
        padding-bottom: 72px;
    }

    .view-header {
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
    }

    .view-header h2 {
        font-size: 1.2rem;
        text-align: center;
        line-height: 1.25;
    }

    .daily-date-heading {
        flex: 1;
    }

    .daily-vitality-trends,
    .daily-food-mood {
        max-width: 100%;
    }

    .vitality-trend-chip,
    .food-mood-chip {
        max-width: 100%;
        min-height: 24px;
    }

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

    .card-header {
        padding: 12px;
        align-items: flex-start;
        gap: var(--spacing-sm);
        flex-wrap: wrap;
    }

    .card-header h3 {
        font-size: 1rem;
        line-height: 1.3;
    }

    .card-content {
        padding: 12px;
    }

    .meal-summary {
        gap: var(--spacing-sm);
    }

    .summary-details {
        min-width: 0;
        gap: var(--spacing-sm);
    }

    .meal-icon {
        font-size: 28px;
    }

    .summary-text {
        font-size: 0.9rem;
        min-width: 0;
        overflow-wrap: anywhere;
    }

    .summary-food-labels {
        margin-left: 6px;
    }

    .toggle-label {
        font-size: 0.82rem;
    }

    .add-food-form,
    .coffee-entry-editor,
    .mood-filter-bar {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .add-food-form .btn,
    .coffee-entry-editor .btn {
        width: 100%;
        margin-bottom: 0;
    }

    .flex-1,
    .coffee-time-field {
        width: 100%;
        flex: 1 1 auto;
    }

    .food-mood-group {
        grid-template-columns: 1fr;
    }

    .food-mood-rating {
        width: 100%;
        justify-content: space-between;
    }

    .mood-note-row {
        grid-template-columns: 1fr;
    }

    .coffee-entry-main {
        align-items: stretch;
        flex-wrap: wrap;
    }

    .coffee-entry-main .select-wrapper {
        flex: 1 1 100%;
    }

    .coffee-entry-main .material-input {
        flex: 1;
        min-width: 0;
        width: auto;
    }
    
    .coffee-entry-details {
        flex-direction: column;
        align-items: stretch;
    }

    .material-list li {
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .settings-list-section summary {
        padding: 12px;
    }

    .settings-list-section .settings-list-title {
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
    }

    .list-item-content {
        min-width: 0;
    }

    .list-item-title,
    .list-item-subtitle,
    .list-item-ingredients {
        overflow-wrap: anywhere;
    }

    .calendar-grid {
        gap: 4px;
    }

    .calendar-header-day {
        font-size: 0.72rem;
        padding-bottom: 4px;
    }

    .calendar-day {
        min-height: 44px;
        border-radius: 6px;
        font-size: 0.82rem;
    }

    .calendar-day.has-log::after {
        bottom: 5px;
        width: 5px;
        height: 5px;
    }

    .calendar-labels-container {
        gap: 1px;
        margin-top: 2px;
    }

    .group-label {
        font-size: 0.62rem;
        padding: 2px 5px;
    }

    .search-result-card,
    .stat-row,
    .vitality-trend-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .search-result-details {
        align-items: flex-start;
        flex-direction: column;
        gap: 4px;
        margin-top: 4px;
    }

    .distribution-toolbar {
        align-items: stretch;
        gap: var(--spacing-sm);
    }

    .distribution-toolbar .btn,
    #btn-dist-next-top,
    .btn-dist-next-granular {
        width: 100%;
    }

    .vitality-trend-main {
        width: 100%;
        align-items: flex-start;
    }

    .vitality-trend-meta {
        overflow-wrap: anywhere;
    }

    .modal-content {
        width: calc(100vw - 24px);
        max-height: calc(100vh - 24px);
    }
}

@media (max-width: 420px) {
    .app-navigation {
        left: 12px;
        right: 12px;
        grid-template-columns: 1fr;
    }

    .container {
        padding-left: 8px;
        padding-right: 8px;
    }

    .view-header .icon-btn {
        flex: 0 0 40px;
        width: 40px;
        height: 40px;
    }

    .daily-labels-container,
    .daily-vitality-trends,
    .daily-food-mood {
        gap: 3px;
    }

    .vitality-trend-chip,
    .food-mood-chip {
        font-size: 0.68rem;
        padding: 3px 6px;
    }

    .calendar-day {
        min-height: 38px;
        font-size: 0.76rem;
    }

    .calendar-labels-container .group-label {
        max-width: 28px;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}

/* Footer */
.privacy-section {
    margin-bottom: var(--spacing-md);
    scroll-margin-bottom: 56px;
}

.app-footer {
    background-color: var(--surface-color);
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    position: sticky;
    bottom: 0;
    z-index: 100;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-link {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

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