:root {
    /* Light Theme Colors (Default) */
    --bg-color: #f9f9f9;
    --text-color: #333333;
    --nav-bg: #ffffff;
    --border-color: #e0e0e0;
    --primary-color: #4a90e2;
    --primary-hover: #357abd;
    --toolbar-bg: #f1f1f1;
    --prompt-color: #888888;
    --drawer-bg: #ffffff;
    --overlay-bg: rgba(0, 0, 0, 0.5);
    --btn-bg: #e0e0e0;
    --btn-hover: #cccccc;
    --success-color: #28a745;
    --error-color: #dc3545;
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --nav-bg: #1e1e1e;
    --border-color: #333333;
    --primary-color: #3a80d2;
    --primary-hover: #256abd;
    --toolbar-bg: #2a2a2a;
    --prompt-color: #aaaaaa;
    --drawer-bg: #1e1e1e;
    --overlay-bg: rgba(0, 0, 0, 0.7);
    --btn-bg: #333333;
    --btn-hover: #444444;
}

@media (prefers-color-scheme: dark) {
    :root[data-theme="system"] {
        --bg-color: #121212;
        --text-color: #e0e0e0;
        --nav-bg: #1e1e1e;
        --border-color: #333333;
        --primary-color: #3a80d2;
        --primary-hover: #256abd;
        --toolbar-bg: #2a2a2a;
        --prompt-color: #aaaaaa;
        --drawer-bg: #1e1e1e;
        --overlay-bg: rgba(0, 0, 0, 0.7);
        --btn-bg: #333333;
        --btn-hover: #444444;
    }
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

/* Navigation */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.top-nav h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.nav-right {
    display: flex;
    align-items: center;
}

.nav-right button {
    display: flex;
    justify-content: center;
    align-items: center;
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    margin-left: 1rem;
    color: var(--text-color);
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.nav-right button:hover {
    background-color: var(--btn-bg);
}

/* Settings Drawer */
.drawer {
    position: fixed;
    top: 0;
    right: -350px;
    width: 300px;
    height: 100%;
    background-color: var(--drawer-bg);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    z-index: 1000;
    transition: right 0.3s ease;
    display: flex;
    flex-direction: column;
}

.drawer.open {
    right: 0;
}

.drawer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.drawer-header button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-color);
}

.drawer-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
}

.drawer-section {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.drawer-section h3 {
    font-size: 1.1rem;
    margin-bottom: 0.2rem;
    color: var(--primary-color);
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.drawer-input,
.drawer-select {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

.drawer-btn {
    padding: 0.8rem 1rem;
    background-color: var(--btn-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    text-align: left;
    transition: background-color 0.2s;
}

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

.auth-section {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#g-drive-status {
    font-size: 0.9rem;
    color: var(--prompt-color);
}

.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--overlay-bg);
    z-index: 999;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease, visibility 0.3s;
}

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

/* Main Content */
.journal-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.journal-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.entry-title {
    font-size: 2rem;
    font-weight: 700;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-color);
    padding: 0.5rem 0;
    outline: none;
    transition: border-color 0.3s;
}

.entry-title:focus {
    border-bottom-color: var(--primary-color);
}

.header-sub {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.prompt-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--prompt-color);
    flex: 1;
}

.streak-counter {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: normal;
    font-size: 1rem;
    color: var(--text-color);
    margin-left: 1rem;
    white-space: nowrap;
}

.streak-counter.streak-active .streak-text {
    font-weight: bold;
    background: linear-gradient(90deg, #ff4500, #ff8c00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.profile-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    object-fit: cover;
    cursor: pointer;
    display: block;
}

/* Editor */
.editor-container {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--nav-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.rich-text-editor {
    min-height: 300px;
    padding: 1.5rem;
    outline: none;
    font-size: 1.1rem;
    overflow-y: auto;
}

.rich-text-editor[placeholder]:empty:before {
    content: attr(placeholder);
    color: var(--prompt-color);
    cursor: text;
}

.rich-text-editor p { margin-bottom: 1em; }
.rich-text-editor h1 { font-size: 2em; margin-bottom: 0.5em; }
.rich-text-editor h2 { font-size: 1.5em; margin-bottom: 0.5em; }
.rich-text-editor a { color: var(--primary-color); text-decoration: underline; }

/* Toolbar */
.toolbar-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    border-top: 1px solid var(--border-color);
    background-color: var(--toolbar-bg);
    border-radius: 0 0 8px 8px;
    padding: 0.5rem;
}

.toggle-toolbar-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.3rem 0.6rem;
    cursor: pointer;
    color: var(--text-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

.toggle-toolbar-btn:hover {
    background-color: var(--btn-bg);
}

.formatting-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    max-height: 50px;
    opacity: 1;
    overflow: visible !important;
    /* Quill specific resets */
    border: none !important;
    padding: 0 !important;
}

.formatting-toolbar.hidden {
    max-height: 0;
    opacity: 0;
    padding: 0;
    pointer-events: none;
    overflow: hidden !important;
}

/* Custom Quill Line Height Dropdown */
.ql-snow .ql-picker.ql-lineheight {
    width: 80px;
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="1.0"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value="1.0"]::before {
    content: 'Single';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="1.5"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value="1.5"]::before {
    content: '1.5';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label[data-value="2.0"]::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item[data-value="2.0"]::before {
    content: 'Double';
}
.ql-snow .ql-picker.ql-lineheight .ql-picker-label::before,
.ql-snow .ql-picker.ql-lineheight .ql-picker-item::before {
    content: '1.5'; /* Default */
}

/* Quill Theme Overrides for dark mode support */
.ql-snow .ql-picker,
.ql-snow .ql-picker-label,
.ql-snow .ql-picker-item {
    color: var(--text-color) !important;
}
.ql-snow .ql-stroke {
    stroke: var(--text-color);
}
.ql-snow .ql-fill {
    fill: var(--text-color);
}
.ql-snow .ql-picker-options {
    background-color: var(--bg-color) !important;
    border-color: var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}
.ql-snow .ql-picker-item:hover {
    background-color: rgba(46, 204, 113, 0.1);
    color: var(--primary-color) !important;
}
.ql-snow .ql-picker-item.ql-selected,
.ql-snow .ql-picker-label:hover, .ql-snow .ql-picker-label.ql-active {
    color: var(--primary-color) !important;
}
.ql-snow .ql-picker-label:hover .ql-stroke, .ql-snow .ql-picker-label.ql-active .ql-stroke,
.ql-snow button:hover .ql-stroke, .ql-snow button.ql-active .ql-stroke {
    stroke: var(--primary-color);
}
.ql-snow button:hover .ql-fill, .ql-snow button.ql-active .ql-fill {
    fill: var(--primary-color);
}
.ql-container.ql-snow {
    border: none;
    font-family: inherit;
    font-size: 1rem;
}
.ql-editor {
    min-height: 300px;
}
.ql-editor.ql-blank::before {
    color: var(--prompt-color) !important;
    font-style: italic !important;
    opacity: 1 !important;
}

/* Actions */
.actions-container {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    font-size: 1.1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s;
}

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

.save-status {
    font-size: 0.9rem;
    color: var(--prompt-color);
}

.save-status.success { color: var(--success-color); }
.save-status.error { color: var(--error-color); }

.text-error { color: var(--error-color); font-weight: bold; }

.hidden {
    display: none !important;
}

/* Animations */
@keyframes heartbeat {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 51, 0, 0.6);
    }
    15% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 51, 0, 0);
    }
    25% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 51, 0, 0);
    }
    35% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 51, 0, 0);
    }
    50% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 51, 0, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 51, 0, 0);
    }
}

.heartbeat-pulse {
    animation: heartbeat 1.5s ease-in-out 3;
    border-color: #FF3300 !important;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--overlay-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal {
    background-color: var(--drawer-bg);
    border-radius: 8px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.25rem;
}

.close-modal-btn {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-color);
}

.modal-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-input {
    padding: 0.8rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
    width: 100%;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 1rem;
}

.picker-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.picker-item {
    padding: 0.8rem 1rem;
    background-color: var(--btn-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.picker-item:hover {
    background-color: var(--btn-hover);
}

.picker-item.active {
    border-color: var(--primary-color);
    background-color: var(--primary-color);
    color: white;
}

/* Responsive */
@media (max-width: 600px) {
    .journal-container {
        padding: 1rem;
    }

    .entry-title {
        font-size: 1.5rem;
    }

    .formatting-toolbar {
        max-height: 200px; /* Allow toolbar to wrap multiple lines */
        gap: 0.3rem;
    }

    .format-btn,
    .formatting-toolbar select,
    .toggle-toolbar-btn {
        padding: 0.6rem; /* Increase touch target */
        font-size: 1.1rem;
    }

    .format-btn {
        min-width: 44px; /* Minimum touch target width */
        height: 44px;
    }
}

/* Reading Drawer */
.read-btn {
    background-color: #2ecc71;
    width: auto;
}
.read-btn:hover {
    background-color: #27ae60;
}

.read-drawer {
    position: fixed;
    top: 0;
    left: -100vw;
    width: 100vw;
    height: 100dvh;
    padding-bottom: env(safe-area-inset-bottom, 20px);
    background-color: var(--bg-color);
    color: var(--text-color);
    z-index: 3000;
    transition: left 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    flex-direction: column;
}
.read-drawer.open {
    left: 0;
}

.read-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--nav-bg);
}

.read-header h2 { margin: 0; font-size: 1.5rem; }
.read-header .icon-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
}

.read-body {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.read-left-pane {
    width: 66%;
    padding: 2rem;
    overflow-y: auto;
    border-right: 1px solid var(--border-color);
}

.read-right-pane {
    width: 34%;
    padding: 2rem;
    overflow-y: auto;
    background-color: var(--drawer-bg);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.read-content {
    max-width: 800px;
    margin: 0 auto;
}

.read-content .journal-entry {
    margin-bottom: 2rem;
}
.read-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 2rem 0;
}

.read-loading {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    color: var(--prompt-color);
    gap: 1rem;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid #2ecc71;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Custom Calendar */
.calendar-container {
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    position: relative;
}

.cal-nav-btn {
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
}

.cal-title {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    font-weight: bold;
    font-size: 1.1rem;
}

.cal-month-label {
    cursor: pointer;
}

.cal-year-display {
    cursor: pointer;
    font-weight: bold;
    font-size: 1.1rem;
    padding: 0 0.2rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.cal-year-display:hover {
    background-color: var(--border-color);
}

.cal-year-input {
    background: none;
    border: 1px solid transparent;
    color: var(--text-color);
    font-size: 1.1rem;
    font-weight: bold;
    width: 60px;
    text-align: center;
    outline: none;
}
.cal-year-input:focus {
    border-bottom: 1px solid var(--primary-color);
}

.cal-month-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--nav-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    list-style: none;
    padding: 0.5rem 0;
    margin: 0;
    z-index: 10;
    width: 120px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.cal-month-dropdown li {
    padding: 0.5rem 1rem;
    cursor: pointer;
}
.cal-month-dropdown li:hover {
    background: var(--btn-bg);
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: 0.9rem;
    color: var(--prompt-color);
    margin-bottom: 0.5rem;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.cal-day {
    aspect-ratio: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1rem;
    border-radius: 50%;
    color: var(--prompt-color);
    cursor: default;
    user-select: none;
}

.cal-day.empty {
    visibility: hidden;
}

.cal-day.has-entry {
    color: var(--text-color);
    font-weight: bold;
    cursor: pointer;
}
.cal-day.has-entry:hover {
    background-color: var(--btn-bg);
}

.cal-day.selected {
    background-color: #2ecc71;
    color: white;
}

/* Entry List (Right Pane) */
.read-entry-list-container h3 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}
.read-entry-list {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.read-entry-list li {
    padding: 0.8rem;
    background: var(--btn-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}
.read-entry-list li:hover {
    background: var(--btn-hover);
}

@media (max-width: 768px) {
    .read-body {
        flex-direction: column;
    }
    .read-left-pane {
        width: 100%;
        height: 60%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .read-right-pane {
        width: 100%;
        height: 40%;
    }
}