:root {
    /* Brand Colors & Glass Effects */
    --bg-dark: #f9f9f9;
    --accent: #f59e0b;
    --accent-hover: #d97706;
    --text-primary: #121212;
    --text-muted: #666666;
    --danger: #ef4444;
    --success: #10b981;
    
    --glass-bg: rgba(255, 255, 255, 0.614);
    --glass-border: transparent;
    --glass-shadow: none;
    
    --theme-overlay-start: rgba(255, 255, 255, 0.4);
    --theme-overlay-end: rgba(255, 255, 255, 0.1);
    --theme-surface-2: rgba(0, 0, 0, 0.02);
    --theme-surface-5: rgba(0, 0, 0, 0.05);
    --theme-surface-10: rgba(0, 0, 0, 0.1);
    --theme-surface-15: rgba(0, 0, 0, 0.15);
    
    --radius-lg: 32px;
    --radius-md: 24px;
    --radius-sm: 16px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

:root[data-theme='dark'] {
    --bg-dark: #121212;
    --text-primary: #ffffff;
    --text-muted: #a0a0a0;
    
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-shadow: none;
    
    --theme-overlay-start: rgba(0, 0, 0, 0.85);
    --theme-overlay-end: rgba(0, 0, 0, 0.45);
    --theme-surface-2: rgba(255, 255, 255, 0.02);
    --theme-surface-5: rgba(255, 255, 255, 0.05);
    --theme-surface-10: rgba(255, 255, 255, 0.1);
    --theme-surface-15: rgba(255, 255, 255, 0.15);
}

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

body {
    font-family: 'Outfit', sans-serif;
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    background-color: var(--bg-dark);
}

/* Dynamic Background */
.background-image {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: url('https://images.unsplash.com/photo-1534447677768-be436bb09401?q=80&w=2094&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
    z-index: -2;
    transform: scale(1.05); /* Slight zoom for hardware acceleration / pseudo-parallax */
}

.overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, var(--theme-overlay-start) 0%, var(--theme-overlay-end) 100%);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: -1;
}

/* Glassmorphism utility */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-lg);
}

.glass-input {
    background: var(--theme-surface-5);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
    width: 100%;
}
.glass-input:focus {
    background: var(--theme-surface-10);
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

/* Container & Layout */
.container {
    display: flex;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    gap: 2rem;
    min-height: 100vh;
    align-items: stretch;
}

.panel {
    flex: 1 1 0%;
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    animation: fadeIn 0.8s ease forwards;
    opacity: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.date-display {
    font-weight: 300;
    color: var(--text-muted);
}

/* Shortcuts Grid */
.shortcuts-panel {
    border-radius: var(--radius-lg); /* No glass background here by default, tiles will have it */
    padding: 1rem 0; /* Align with top visually */
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 1.5rem;
}

.shortcut-tile {
    aspect-ratio: 1;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    position: relative;
    cursor: pointer;
    overflow: hidden;
}

.shortcut-tile:hover {
    transform: translateY(-5px);
    background: var(--theme-surface-10);
    box-shadow: none;
    border-color: transparent;
}

.shortcut-icon {
    width: 48px;
    height: 48px;
    background: var(--theme-surface-10);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.75rem;
    font-size: 1.5rem;
    transition: var(--transition);
}

.shortcut-tile:hover .shortcut-icon {
    background: var(--accent);
    transform: scale(1.1);
}

.shortcut-name {
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    width: 90%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.edit-shortcut, .delete-shortcut {
    position: absolute;
    top: 8px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    color: var(--text-primary);
    background: var(--theme-surface-15);
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
    font-size: 0.75rem;
}

.delete-shortcut {
    right: 8px;
}
.delete-shortcut:hover {
    background: rgba(239, 68, 68, 0.9);
    color: white;
}

.edit-shortcut {
    left: 8px;
}
.edit-shortcut:hover {
    background: var(--accent);
    color: white;
}

.shortcut-tile:hover .edit-shortcut,
.shortcut-tile:hover .delete-shortcut {
    opacity: 1;
}

/* Modal */
.modal {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 1;
    transition: opacity 0.3s ease;
}
.modal.hidden {
    opacity: 0;
    pointer-events: none;
}
.modal-content {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    transform: translateY(0);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal.hidden .modal-content {
    transform: translateY(20px);
}
.modal-content h3 {
    margin-bottom: 1.5rem;
}
.modal-content input {
    margin-bottom: 1rem;
}
.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    border: none;
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}
.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: none;
}
.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}
.btn-secondary {
    background: transparent;
    color: var(--text-muted);
}
.btn-secondary:hover {
    color: var(--text-primary);
    background: var(--theme-surface-5);
}
.icon-btn {
    background: var(--theme-surface-5);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}
.icon-btn:hover {
    background: var(--theme-surface-15);
    transform: translateY(-2px);
}
/* primary icon btn inherited globally by monochrome styling */
.text-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
}
.text-btn:hover {
    color: var(--text-primary);
}

/* Todo Panel */
.todo-panel {
    display: flex;
    flex-direction: column;
}

.list-selector-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 0;
    margin-right: 1rem;
}

.lists-scroller {
    display: flex;
    overflow-x: auto;
    gap: 0.5rem;
    padding-bottom: 2px;
    scrollbar-width: none;
}
.lists-scroller::-webkit-scrollbar {
    display: none;
}

.list-tab {
    background: var(--theme-surface-5);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}
.list-tab.active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}
.list-tab:hover:not(.active) {
    background: var(--theme-surface-10);
}

.icon-btn-small {
    background: var(--theme-surface-5);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
}
.icon-btn-small:hover {
    background: var(--theme-surface-15);
}

.change-bg-btn {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 50;
    border-radius: 50%;
    box-shadow: var(--glass-shadow);
}

.todo-input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.todo-list {
    list-style: none;
    flex: 1;
    overflow-y: auto;
    padding-right: 0.5rem;
}
/* Scrollbar */
.todo-list::-webkit-scrollbar {
    width: 6px;
}
.todo-list::-webkit-scrollbar-track {
    background: var(--theme-surface-2);
}
.todo-list::-webkit-scrollbar-thumb {
    background: var(--theme-surface-10);
    border-radius: 10px;
}

.todo-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--theme-surface-5);
    color: var(--text-primary);
    border: none;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.todo-item:hover {
    background: var(--theme-surface-15);
    transform: translateX(4px);
}

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

.todo-item.completed .todo-text {
    text-decoration: line-through;
    color: #888888;
}

.todo-checkbox {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    margin-right: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.todo-checkbox:checked {
    background: var(--accent);
}

.todo-checkbox:checked::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 10px;
    color: white;
}

.todo-text {
    flex: 1;
    font-size: 1.05rem;
    transition: var(--transition);
    word-break: break-word;
}

.todo-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.5rem;
    opacity: 0;
    transition: var(--transition);
}

.todo-item:hover .todo-delete {
    opacity: 1;
}

.todo-delete:hover {
    color: var(--danger);
}

.todo-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--glass-border);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.signature {
    font-family: 'Dancing Script', cursive;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-primary);
    filter: drop-shadow(0 2px 5px rgba(0,0,0,0.3));
    letter-spacing: 1.5px;
    margin-left: 0.5rem;
}

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

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.shortcuts-panel { animation-delay: 0.1s; }
.todo-panel { animation-delay: 0.3s; }

/* Responsive adjustments */
@media (max-width: 900px) {
    .container {
        flex-direction: column;
        padding: 1rem;
    }
    
    .panel {
        min-height: 400px;
    }
}

/* High-contrast Monochrome Buttons */
#add-shortcut-btn, #options-toggle-btn, .primary-icon-btn {
    background: var(--text-primary);
    color: var(--bg-dark);
}
#add-shortcut-btn:hover, #options-toggle-btn:hover, .primary-icon-btn:hover {
    background: var(--text-primary);
    transform: translateY(-2px);
    opacity: 0.85;
}

/* Views & Toggles */
.view-toggle {
    display: flex;
    background: var(--theme-surface-5);
    border-radius: var(--radius-sm);
    padding: 0.25rem;
    gap: 0.25rem;
}

.view-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.view-btn.active {
    background: var(--accent);
    color: white;
}

.view-btn:hover:not(.active) {
    color: var(--text-primary);
}

.view-container {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    margin-top: 1rem;
    animation: fadeIn 0.4s ease;
}

.view-container.hidden-view {
    display: none;
}

.notes-textarea {
    flex: 1;
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    line-height: 1.6;
    padding: 0.5rem;
    resize: none;
}

.notes-textarea:focus {
    outline: none;
}

.notes-textarea::placeholder {
    color: var(--text-muted);
}

/* Options Menu Settings */
.options-menu {
    position: absolute;
    bottom: calc(100% + 1rem);
    left: 0;
    width: 200px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border-radius: var(--radius-md);
    transform-origin: bottom left;
    transition: var(--transition);
    z-index: 100;
}

.options-menu.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95);
}

.options-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.options-item:hover {
    background: var(--theme-surface-5);
}

.options-divider {
    height: 1px;
    background: var(--theme-surface-15);
    margin: 0.25rem 0;
}

.options-item-col {
    display: flex;
    flex-direction: column;
    padding: 0.5rem;
}

.color-swatches {
    display: flex;
    gap: 0.75rem;
}

.color-swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    opacity: 0.7;
}

.color-swatch:hover {
    transform: scale(1.1);
    opacity: 1;
}

.color-swatch.active {
    opacity: 1;
    box-shadow: 0 0 0 2px var(--bg-dark), 0 0 0 4px var(--text-primary);
}

/* Background Selector Grid */
.bg-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

/* Custom scrollbar for grid */
.bg-grid::-webkit-scrollbar {
    width: 6px;
}
.bg-grid::-webkit-scrollbar-thumb {
    background-color: var(--theme-surface-15);
    border-radius: 4px;
}

.bg-thumbnail {
    aspect-ratio: 16/9;
    background-size: cover;
    background-position: center;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.bg-thumbnail:hover {
    transform: scale(1.05);
}

.bg-thumbnail.active {
    border-color: var(--accent);
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}