/* --- CSS Variables & General Setup --- */
:root {
--font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
--primary-color: #553986;
--secondary-color: #553986;
--success-color: #28a745;
--warning-color: #ffc107;
--danger-color: #dc3545;

/* Light Theme */
--bg-color: #f4f7f9;
--card-bg-color: #ffffff;
--text-color: #333333;
--heading-color: #111111;
--border-color: #e0e0e0;
--input-bg-color: #fdfdfd;
--shadow-color: rgba(0, 0, 0, 0.1);
--logo-filter: none;

/* Transitions & Radii */
--transition-speed: 0.3s;
--border-radius: 12px;

}

/* Dark Theme */
body.dark-mode {
--bg-color: #121212;
--card-bg-color: #1e1e1e;
--text-color: #cccccc;
--heading-color: #ffffff;
--border-color: #333333;
--input-bg-color: #2c2c2c;
--shadow-color: rgba(0, 0, 0, 0.25);
--logo-filter: brightness(0) invert(1);
}

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

html {
scroll-behavior: smooth;
}

body {
font-family: var(--font-family);
background-color: var(--bg-color);
color: var(--text-color);
transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
line-height: 1.6;
min-height: 100vh;
}

/* --- Layout --- */
.site-header {
display: flex;
justify-content: space-between;
align-items: center;
gap: 1rem;
padding: clamp(1rem, 3vw, 1.75rem) clamp(1.5rem, 6vw, 3rem);
background-color: var(--card-bg-color);
box-shadow: 0 2px 10px var(--shadow-color);
transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.logo-container {
display: flex;
align-items: center;
gap: 0.75rem;
}

.logo {
height: clamp(36px, 4vw, 48px);
filter: var(--logo-filter);
transition: filter var(--transition-speed) ease, transform var(--transition-speed) ease;
}
.logo-container:hover .logo {
transform: translateY(-2px);
}

.site-title {
font-size: clamp(1.1rem, 2.4vw, 1.65rem);
font-weight: 700;
color: var(--heading-color);
line-height: 1.1;
transition: color var(--transition-speed) ease;
}

.main-content {
display: grid;
grid-template-columns: 1fr;
gap: clamp(1.5rem, 4vw, 2.5rem);
padding: clamp(1.5rem, 5vw, 3rem) clamp(1.5rem, 6vw, 3rem);
width: min(1200px, 100%);
margin: 0 auto;
}

@media (min-width: 992px) {
.main-content {
grid-template-columns: 2fr 1fr;
}
}

.site-footer {
text-align: center;
padding: 1.5rem;
font-size: 0.9rem;
color: var(--text-color);
opacity: 0.7;
}

.site-footer a {
color: var(--primary-color);
text-decoration: none;
font-weight: 600;
}
.site-footer a:hover {
text-decoration: underline;
}

/* --- Components --- */
.card {
background-color: var(--card-bg-color);
padding: clamp(1.5rem, 4vw, 2.5rem);
border-radius: var(--border-radius);
box-shadow: 0 8px 30px var(--shadow-color);
transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease, transform var(--transition-speed) ease;
will-change: transform;
}
.card:hover {
transform: translateY(-3px);
box-shadow: 0 12px 35px color-mix(in srgb, var(--shadow-color) 60%, rgba(0, 0, 0, 0.05));
}

h1, h2 {
color: var(--heading-color);
margin-bottom: 0.5rem;
font-weight: 700;
}

h1 { font-size: 1.5rem; }
h2 { font-size: 1.75rem; }
p { margin-bottom: 1.5rem; }

.input-group {
display: flex;
flex-wrap: wrap;
gap: 0.75rem;
align-items: stretch;
}

input[type="text"] {
width: 100%;
padding: 12px 16px;
border: 1px solid var(--border-color);
border-radius: var(--border-radius);
font-size: 1rem;
background-color: var(--input-bg-color);
color: var(--text-color);
transition: all var(--transition-speed) ease;
}

input[type="text"]:focus {
outline: none;
border-color: var(--primary-color);
box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 20%, transparent);
}

button {
padding: 12px 20px;
border: none;
border-radius: var(--border-radius);
font-size: 1rem;
font-weight: 600;
cursor: pointer;
transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease, background-color var(--transition-speed) ease, color var(--transition-speed) ease;
display: inline-flex;
align-items: center;
justify-content: center;
gap: 0.5rem;
}
button:active {
transform: scale(0.98);
}

#generate-btn {
background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
color: white;
box-shadow: 0 4px 15px color-mix(in srgb, var(--primary-color) 30%, transparent);
flex: 1 0 160px;
}
#generate-btn:hover {
transform: translateY(-2px);
box-shadow: 0 6px 20px color-mix(in srgb, var(--primary-color) 40%, transparent);
}

.action-buttons {
display: flex;
flex-wrap: wrap;
gap: 0.5rem;
margin-top: 1rem;
}
.action-buttons button {
background: var(--input-bg-color);
color: var(--text-color);
border: 1px solid var(--border-color);
flex: 1 1 160px;
}
.action-buttons button:hover {
background-color: color-mix(in srgb, var(--bg-color) 50%, var(--card-bg-color));
border-color: var(--primary-color);
}

/* --- Result Display --- */
.result-container {
margin-top: 2rem;
padding: 1.5rem;
border-radius: var(--border-radius);
background-color: color-mix(in srgb, var(--primary-color) 5%, transparent);
border: 1px dashed var(--primary-color);
min-height: 100px;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
text-align: center;
opacity: 0;
transform: translateY(10px);
transition: opacity 0.5s ease, transform 0.5s ease;
}
.result-container.visible {
opacity: 1;
transform: translateY(0);
}

.result-text {
font-size: 2rem;
font-weight: 700;
color: var(--primary-color);
word-break: break-word;
}
.result-text span {
display: inline-block;
opacity: 0;
transform: translateY(10px);
animation: fadeInWord 0.4s forwards ease-out;
}

@keyframes fadeInWord {
to { opacity: 1; transform: translateY(0); }
}

.result-actions {
margin-top: 1rem;
display: flex;
gap: 0.75rem;
}

.icon-btn {
background-color: transparent;
border: none;
color: var(--text-color);
opacity: 0.7;
padding: 0.5rem;
}
.icon-btn:hover {
opacity: 1;
color: var(--primary-color);
}
.icon-btn svg { width: 20px; height: 20px; }
.icon-btn.favorited { color: var(--warning-color); }

/* --- History & Favorites Section --- */
.tabs {
display: flex;
border-bottom: 1px solid var(--border-color);
margin-bottom: 1rem;
}
.tab-link {
padding: 0.75rem 1rem;
border: none;
background: none;
color: var(--text-color);
opacity: 0.6;
border-bottom: 3px solid transparent;
}
.tab-link.active {
opacity: 1;
border-bottom-color: var(--primary-color);
}
.tab-content {
display: none;
}
.tab-content.active {
display: block;
}

#history-list, #favorites-list {
list-style: none;
max-height: 400px;
overflow-y: auto;
padding-right: 0.5rem; /* for scrollbar */
}

.history-item, .favorite-item {
background-color: var(--card-bg-color);
padding: 1rem;
border-radius: 8px;
margin-bottom: 0.75rem;
display: flex;
justify-content: space-between;
align-items: center;
border: 1px solid var(--border-color);
}
.history-item-content {
cursor: pointer;
}
.history-topic {
font-weight: 600;
color: var(--heading-color);
}
.history-words {
color: var(--primary-color);
}

.empty-state {
text-align: center;
padding: 2rem;
opacity: 0.6;
}

#clear-history-btn {
width: 100%;
margin-top: 1rem;
background-color: var(--danger-color);
color: white;
opacity: 0.8;
}
#clear-history-btn:hover {
opacity: 1;
}

/* --- Theme Toggle --- */
#theme-toggle-btn {
background: none;
border: none;
color: var(--heading-color);
width: 40px;
height: 40px;
}
.moon-icon { display: none; }
.sun-icon { display: block; }
body.dark-mode .moon-icon { display: block; }
body.dark-mode .sun-icon { display: none; }

/* --- Utilities & Animations --- */
.loading-spinner {
border: 3px solid rgba(255, 255, 255, 0.3);
border-left-color: #fff;
border-radius: 50%;
width: 18px;
height: 18px;
animation: spin 1s linear infinite;
display: none;
}
#generate-btn.loading .loading-spinner { display: inline-block; }
#generate-btn.loading .btn-text { display: none; }

@keyframes spin {
to { transform: rotate(360deg); }
}

/* Toast Notification */
.toast {
position: fixed;
bottom: 20px;
left: 50%;
transform: translateX(-50%);
padding: 12px 20px;
background-color: var(--heading-color);
color: var(--bg-color);
border-radius: var(--border-radius);
box-shadow: 0 4px 20px var(--shadow-color);
z-index: 1000;
opacity: 0;
visibility: hidden;
transition: opacity 0.3s, visibility 0.3s, bottom 0.3s;
}
.toast.show {
opacity: 1;
visibility: visible;
bottom: 30px;
}
/* NEW: Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.icon-btn {
    position: relative;
}

.badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger-color);
    color: white;
    border-radius: 10px;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* NEW: Input wrapper for autocomplete */
.input-wrapper {
    position: relative;
    flex: 1;
}

.char-counter {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    opacity: 0.6;
    pointer-events: none;
}

.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
    box-shadow: 0 4px 12px var(--shadow-color);
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

.autocomplete-item {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.autocomplete-item:hover {
    background: var(--bg-color);
}

/* NEW: Word count selector */
.word-count-selector {
    margin: 1rem 0;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 8px;
}

.word-count-selector label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.radio-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal;
}

/* NEW: List controls */
.list-controls {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg-color);
    color: var(--text-color);
}

.sort-select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg-color);
    color: var(--text-color);
    cursor: pointer;
}

/* NEW: Data controls */
.data-controls {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

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

.danger-btn {
    background: var(--danger-color);
    color: white;
    flex: 1;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

/* NEW: Tags */
.tags {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.tag {
    background: var(--primary-color);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.7rem;
}

/* NEW: Item actions */
.item-actions {
    display: flex;
    gap: 0.25rem;
}

/* NEW: View modes */
body.compact-view .history-item,
body.compact-view .favorite-item {
    padding: 0.5rem;
    font-size: 0.9rem;
}

body.expanded-view .history-item,
body.expanded-view .favorite-item {
    padding: 1.5rem;
    font-size: 1.1rem;
}

/* NEW: Modal styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s;
}

.modal-content {
    background: var(--card-bg-color);
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px var(--shadow-color);
    animation: slideUp 0.3s;
}

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

.modal-header h2 {
    margin: 0;
}

.close-modal {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-color);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-body {
    padding: 1.5rem;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* NEW: Statistics grid */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-color);
    border-radius: 8px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* NEW: Settings items */
.setting-item {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-item label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.setting-item select {
    margin-left: auto;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg-color);
    color: var(--text-color);
}

.settings-section + .settings-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.settings-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.setting-description {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
}

.setting-item input[type="url"],
.setting-item input[type="password"],
.setting-item input[type="text"],
.setting-item textarea {
    width: 100%;
    margin-top: 0.75rem;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg-color);
    color: var(--text-color);
    font-size: 0.95rem;
}

.setting-item input[type="color"] {
    width: 48px;
    height: 32px;
    padding: 0;
    border: none;
    background: transparent;
}

.accent-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.setting-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.small-btn {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
}

/* NEW: Keyboard shortcuts */
.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 8px;
}

kbd {
    padding: 0.25rem 0.5rem;
    background: var(--card-bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.85rem;
    box-shadow: 0 2px 4px var(--shadow-color);
}

/* NEW: Floating help button */
.floating-help-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 4px 12px var(--shadow-color);
    cursor: pointer;
    z-index: 999;
    transition: transform 0.3s;
}

.floating-help-btn:hover {
    transform: scale(1.1);
}

/* NEW: Batch processing */
#batch-input {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--input-bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    resize: vertical;
}

.batch-results {
    margin-top: 1rem;
}

.batch-result-item {
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    background: var(--bg-color);
}

.batch-result-item.success {
    border-left: 4px solid var(--success-color);
}

.batch-result-item.error {
    border-left: 4px solid var(--danger-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    margin-top: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--primary-color);
    transition: width 0.3s;
}

/* NEW: No animations mode */
body.no-animations * {
    animation: none !important;
    transition: none !important;
}

/* NEW: Search highlighting */
mark {
    background: var(--warning-color);
    color: var(--heading-color);
    padding: 0 0.2rem;
    border-radius: 2px;
}

/* NEW: Multiple results */
.multiple-results {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

/* Responsive adjustments */
@media (max-width: 1024px) {
    .site-header {
        padding: clamp(1rem, 4vw, 1.5rem) clamp(1rem, 5vw, 2.5rem);
    }

    .main-content {
        padding: clamp(1.25rem, 4vw, 2.5rem) clamp(1rem, 5vw, 2.5rem);
    }
}

@media (max-width: 768px) {
    .site-header {
        flex-direction: column;
        align-items: stretch;
    }

    .logo-container {
        justify-content: center;
    }

    .header-actions {
        justify-content: center;
        width: 100%;
    }

    .input-group {
        flex-direction: column;
    }

    #generate-btn {
        width: 100%;
    }

    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .action-buttons button {
        width: 100%;
    }

    .list-controls,
    .data-controls {
        flex-direction: column;
    }

    .stat-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .floating-help-btn {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    .modal-content {
        width: 95%;
    }
}

@media (max-width: 560px) {
    .stat-grid {
        grid-template-columns: 1fr;
    }

    .site-header {
        gap: 0.75rem;
    }

    .logo {
        height: clamp(32px, 8vw, 40px);
    }

    .tabs {
        flex-wrap: wrap;
    }

    .tab-link {
        flex: 1 1 140px;
        text-align: center;
    }
}

@media (min-width: 640px) {
    .multiple-results {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    }
}

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