/* CSS Custom Properties */
:root {
    --color-primary: #3b82f6;
    --color-primary-dark: #1e40af;
    --color-secondary: #8b5cf6;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-bg: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-border: #e5e7eb;
    --color-text: #1f2937;
    --color-text-secondary: #6b7280;
    --color-text-light: #9ca3af;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.2s ease-in-out;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #111827;
        --color-bg-secondary: #1f2937;
        --color-border: #374151;
        --color-text: #f3f4f6;
        --color-text-secondary: #d1d5db;
        --color-text-light: #9ca3af;
    }
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    transition: var(--transition);
}

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

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

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

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

a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

/* Layout */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header {
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.header-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.header-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.header-btn:hover {
    background-color: var(--color-border);
}

.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-dark);
}

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

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

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

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-primary);
    padding: var(--spacing-sm);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.btn-text:hover {
    color: var(--color-primary-dark);
}

.btn-icon {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: var(--transition);
    min-height: 44px;
    min-width: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

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

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    min-height: auto;
    min-width: auto;
}

.btn-secondary {
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    color: var(--color-text);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

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

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.close-btn:hover {
    color: var(--color-text);
}

/* Forms */
input, textarea, select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input:disabled, textarea:disabled, select:disabled {
    background-color: var(--color-bg-secondary);
    opacity: 0.6;
    cursor: not-allowed;
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.form-group small {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    margin-bottom: var(--spacing-md);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    min-height: 20px;
    min-width: 20px;
    cursor: pointer;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.filter-select {
    width: 100%;
    max-width: 300px;
}

/* Welcome Screen */
.welcome-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-lg);
}

.welcome-card {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    max-width: 500px;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.welcome-card h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.welcome-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.privacy-notice {
    background-color: var(--color-warning);
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--color-warning);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.privacy-notice ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.privacy-notice li {
    margin-bottom: var(--spacing-sm);
}

.type-selector {
    margin-bottom: var(--spacing-lg);
}

.type-selector h3 {
    margin-bottom: var(--spacing-md);
}

/* Home View */
.home-view {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.reminder-banner {
    background-color: var(--color-warning);
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--color-warning);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
}

.reminder-banner:hover {
    background-color: rgba(245, 158, 11, 0.15);
}

.quick-entry-section h2 {
    margin-bottom: var(--spacing-md);
}

.quick-entry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--spacing-md);
}

.quick-entry-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    min-height: 120px;
    justify-content: center;
}

.quick-entry-btn:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary);
    background-color: rgba(59, 130, 246, 0.1);
}

.quick-entry-btn span:first-child {
    font-size: 2rem;
}

.recent-entries-section {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

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

.section-header h2 {
    margin: 0;
}

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

.entry-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.entry-type {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    min-width: 120px;
}

.entry-type span:first-child {
    font-size: 1.5rem;
}

.entry-value {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    flex: 1;
}

.entry-time {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.entry-delete-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: var(--transition);
}

.entry-delete-btn:hover {
    opacity: 0.7;
}

.nav-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

.nav-btn {
    padding: var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

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

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
}

.modal-content {
    background-color: var(--color-bg);
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

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

.modal-header h2 {
    margin: 0;
}

.entry-form {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.mood-slider {
    width: 100%;
    height: 8px;
    border-radius: var(--radius-md);
    background: linear-gradient(to right, #ef4444, #f59e0b, #10b981);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    margin: var(--spacing-md) 0;
}

.mood-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.mood-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.mood-value {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1.25rem;
}

.mood-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-sm);
}

.warning-box {
    background-color: var(--color-warning);
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--color-warning);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
}

.warning-box strong {
    display: block;
    margin-bottom: var(--spacing-sm);
}

.warning-box p {
    margin-bottom: var(--spacing-md);
}

/* Entries View */
.entries-view {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

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

.view-header h2 {
    margin: 0;
}

.filter-section {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

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

.entry-item-full {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

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

.entry-type-badge {
    font-weight: 600;
    font-size: 1.125rem;
}

.entry-date {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

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

.entry-value-large {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.entry-notes {
    color: var(--color-text-secondary);
    font-style: italic;
    margin: 0;
}

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

/* Chart View */
.chart-view {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.chart-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.chart-type-selector h3 {
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: calc(3 * 44px + 2 * var(--spacing-sm));
    overflow-y: auto;
    padding-right: var(--spacing-xs);
}

.checkbox-group::-webkit-scrollbar {
    width: 6px;
}

.checkbox-group::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

.checkbox-group::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-sm);
}

.checkbox-group::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
}

.checkbox-label:hover {
    background-color: var(--color-bg-secondary);
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.checkbox-label span {
    font-size: 0.9375rem;
}

.date-range-selector {
    display: flex;
    gap: var(--spacing-sm);
}

.range-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--color-border);
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.range-btn:hover {
    border-color: var(--color-primary);
}

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

.chart-container {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    position: relative;
    height: 400px;
}

#chart-canvas {
    max-height: 100%;
}

/* Settings View */
.settings-view {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.settings-section {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.settings-section h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
}

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

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

.setting-item label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.about-text {
    margin: 0;
    color: var(--color-text-secondary);
}

.about-text.small {
    font-size: 0.875rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* Utility Classes */
[x-cloak] {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        padding: var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .quick-entry-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    }

    .quick-entry-btn {
        min-height: 100px;
        padding: var(--spacing-md);
    }

    .quick-entry-btn span:first-child {
        font-size: 1.5rem;
    }

    .mood-scale {
        grid-template-columns: repeat(5, 1fr);
    }

    .entry-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .entry-value {
        align-items: flex-start;
        width: 100%;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .nav-section {
        grid-template-columns: 1fr;
    }

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

    .date-range-selector {
        flex-wrap: wrap;
    }

    .filter-select {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.125rem; }

    .welcome-card {
        padding: var(--spacing-lg);
    }

    .quick-entry-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .quick-entry-btn {
        min-height: 80px;
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }

    .quick-entry-btn span:first-child {
        font-size: 1.25rem;
    }

    .mood-scale {
        grid-template-columns: repeat(5, 1fr);
        gap: var(--spacing-xs);
    }

    .mood-btn {
        padding: var(--spacing-sm);
        font-size: 1rem;
    }

    .entry-item {
        padding: var(--spacing-sm);
    }

    .modal-content {
        max-height: 95vh;
    }

    .modal-header {
        padding: var(--spacing-md);
    }

    .entry-form {
        padding: var(--spacing-md);
    }
}

.quick-entry-buttons {
    display: flex;
    gap: 5px;
}