/* Modern dark theme styling */
:root {
    --main-bg-color: #1a1a1a;
    --secondary-bg: #242424;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --accent-color: #64b5f6;
    --accent-color-rgb: 100, 181, 246;
    --accent-hover: #90caf9;
    --success-color: #81c784;
    --button-bg: #2d2d2d;
    --button-hover-bg: #404040;
    --button-active-bg: #64b5f6;
    --input-bg: #2d2d2d;
    --input-border: #404040;
    --section-divider: #404040;
    --focus-shadow: 0 0 0 2px rgba(100, 181, 246, 0.4);
    
    /* Transform category colors */
    --encoding-color: #7e57c2;      /* Purple for encoding/decoding */
    --cipher-color: #26a69a;        /* Teal for ciphers */
    --visual-color: #ef5350;        /* Red for visual transformations */
    --format-color: #ffb74d;        /* Orange for formatting */
    --unicode-color: #42a5f5;       /* Blue for unicode transformations */
    --special-color: #66bb6a;       /* Green for special transformations */
}

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

body {
    background-color: var(--main-bg-color);
    color: var(--text-color);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px;
    background-color: var(--secondary-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 10px;
}

.logo {
    text-align: left;
}

.logo h1 {
    font-family: 'Courier New', monospace;
    font-weight: bold;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: #00ff00;
    text-shadow: 0 0 5px #00ff00, 0 0 10px rgba(0, 255, 0, 0.8);
    background: linear-gradient(90deg, transparent 0%, rgba(0, 255, 0, 0.2) 50%, transparent 100%);
    padding: 8px;
    border: 1px solid rgba(0, 255, 0, 0.3);
    position: relative;
    overflow: hidden;
    animation: glitch 3s infinite;
}

/* Glitch animation */
@keyframes glitch {
    0% {
        text-shadow: 0 0 5px #00ff00, 0 0 10px rgba(0, 255, 0, 0.8);
        transform: translateX(0);
    }
    5% {
        text-shadow: -2px 0 #ff00ff, 2px 0 #00ffff;
        transform: translateX(2px);
    }
    10% {
        text-shadow: 2px 0 #ff00ff, -2px 0 #00ffff;
        transform: translateX(-2px);
    }
    15% {
        text-shadow: 0 0 5px #00ff00, 0 0 10px rgba(0, 255, 0, 0.8);
        transform: translateX(0);
    }
    85% {
        text-shadow: 0 0 5px #00ff00, 0 0 10px rgba(0, 255, 0, 0.8);
        transform: translateX(0);
    }
    90% {
        text-shadow: 1px 0 #ff00ff, -1px 0 #00ffff;
        transform: translateX(1px);
    }
    95% {
        text-shadow: -1px 0 #ff00ff, 1px 0 #00ffff;
        transform: translateX(-1px);
    }
    100% {
        text-shadow: 0 0 5px #00ff00, 0 0 10px rgba(0, 255, 0, 0.8);
        transform: translateX(0);
    }
}

/* Adding scanline effect */
.logo h1::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        transparent 0%,
        transparent 50%,
        rgba(0, 255, 0, 0.2) 50%,
        rgba(0, 255, 0, 0.2) 100%
    );
    background-size: 100% 4px;
    z-index: 1;
    pointer-events: none;
    opacity: 0.3;
}

.theme-toggle {
    margin-left: 20px;
}

.theme-button {
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.2rem;
    padding: 8px;
    cursor: pointer;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.theme-button:hover {
    background: var(--button-bg);
    transform: rotate(15deg);
}

h1, h2, h3, h4, h5 {
    font-family: 'Courier New', monospace;
    color: var(--text-color);
    margin-bottom: 15px;
}

/* Tabs styling */
.tabs {
    margin-top: 16px;
}

.tab-buttons {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tab-buttons button {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.tab-buttons button i {
    font-size: 14px;
}

.tab-buttons button.active {
    background-color: var(--accent-color);
    color: var(--main-bg-color);
    border-color: var(--accent-color);
    font-weight: 500;
}

.tab-buttons button:hover:not(.active) {
    background-color: var(--button-hover-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.transform-button.active {
    background-color: var(--accent-color);
    color: var(--main-bg-color);
    border-color: var(--accent-color);
}

.transform-button:hover:not(.active) {
    background-color: var(--button-hover-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.tab-content {
    padding: 20px 0;
}

/* Input and output sections */
.input-section,
.output-section,
.decode-section {
    background: var(--main-bg-color);
    border-radius: 4px;
    padding: 16px;
    margin-bottom: 16px;
}

.input-container,
.output-container {
    position: relative;
}

.section-header {
    margin-bottom: 15px;
}

.section-header h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-color);
}

.section-header h3 small {
    font-size: 0.7em;
    font-weight: normal;
    color: var(--text-muted);
    background-color: rgba(100, 181, 246, 0.1);
    padding: 2px 8px;
    border-radius: 12px;
}

.section-header p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9em;
}

.decoded-message {
    margin-top: 8px;
    padding: 12px;
    background: var(--button-bg);
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    position: relative;
}

.decode-method {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: var(--text-muted);
    font-size: 0.9em;
}

.decode-method strong {
    color: var(--accent-color);
}

.decode-priority {
    font-size: 0.8em;
    background-color: rgba(var(--accent-color-rgb), 0.1);
    padding: 2px 8px;
    border-radius: 12px;
    color: var(--accent-color);
}

.decode-result {
    margin-bottom: 12px;
    word-break: break-all;
    white-space: pre-wrap;
    line-height: 1.5;
}

.decode-actions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.use-as-input-button {
    background-color: rgba(var(--accent-color-rgb), 0.1);
    color: var(--accent-color);
    border: none;
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 0.8em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s ease;
}

.use-as-input-button:hover {
    background-color: rgba(var(--accent-color-rgb), 0.2);
}

textarea {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    font-family: 'Fira Code', 'Courier New', monospace;
    resize: vertical;
    min-height: 100px;
    line-height: 1.4;
    font-size: 14px;
    transition: all 0.2s ease;
}

/* Special styling for encoded message textarea */
.output-section textarea {
    background-color: var(--secondary-bg);
    color: var(--accent-color);
    border: 1px solid rgba(100, 181, 246, 0.3);
    border-radius: 6px;
    font-family: 'Fira Code', monospace;
    letter-spacing: 0.5px;
    line-height: 1.5;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
    padding: 14px;
    font-weight: 500;
}

/* Emoji Library Styling */
.emoji-library {
    margin: 12px 0;
    background-color: var(--main-bg-color);
    border-radius: 6px;
    padding: 12px;
    border: 1px solid var(--input-border);
    box-shadow: none;
}

.emoji-library-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--input-border);
    padding: 10px 12px;
    background: var(--secondary-bg);
    border-radius: 6px 6px 0 0;
    box-shadow: none;
    position: relative;
    overflow: hidden;
}

.emoji-library-header:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--special-color), var(--encoding-color), var(--cipher-color), var(--visual-color));
}

.emoji-library-title {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.emoji-library-title h3 {
    margin: 0;
    color: var(--accent-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.emoji-library-title h3 i {
    color: var(--special-color);
}

.emoji-library-title i {
    margin-right: 8px;
    color: var(--accent-color);
}

.emoji-library-subtitle {
    font-size: 0.8rem;
    font-weight: normal;
    color: var(--text-color);
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background-color: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    max-width: fit-content;
}

.emoji-library-subtitle i {
    color: var(--encoding-color);
}

.emoji-search {
    position: relative;
    width: 220px;
}

.emoji-search input {
    width: 100%;
    padding: 8px 12px 8px 32px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.emoji-search input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(var(--accent-color-rgb), 0.2);
    outline: none;
}

.emoji-search i {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-color);
    opacity: 0.5;
}

.emoji-library {
    display: block !important;
    margin-top: 24px;
    margin-bottom: 24px;
    border-radius: 10px;
    background-color: var(--secondary-bg);
    padding: 0;
    box-shadow: none;
    position: relative;
    overflow: hidden;
}

.emoji-library:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--unicode-color), var(--special-color), var(--encoding-color));
    z-index: 1;
}

.emoji-grid-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    border-radius: 0;
    background-color: transparent;
    padding: 0;
    margin: 0;
    border: none;
}

.emoji-grid-note {
    background: linear-gradient(to right, rgba(102, 187, 106, 0.05), rgba(126, 87, 194, 0.05));
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-left: 2px solid var(--special-color);
    box-shadow: none !important;
    max-width: 500px;
    width: 100%;
    border-bottom: none !important;
    border-top: none !important;
    border-right: none !important;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.emoji-header {
    padding: 15px 20px;
    margin-bottom: 15px;
    text-align: center;
    border-bottom: 1px solid var(--input-border);
    background: linear-gradient(to right, rgba(66, 165, 245, 0.02), rgba(126, 87, 194, 0.02));
}

.emoji-header h3 {
    font-size: 1.3rem;
    margin: 0 0 8px 0;
    color: var(--text-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.emoji-header h3 i {
    color: var(--special-color);
    font-size: 1.2rem;
}

.emoji-subtitle {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.85;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.emoji-grid-note i, .emoji-subtitle i {
    color: var(--special-color);
    font-size: 0.9rem;
    opacity: 0.9;
}

.emoji-count {
    font-size: 0.75rem;
    color: var(--text-color);
    text-align: center;
    padding: 4px 8px;
    margin-top: 8px;
    border-radius: 12px;
    background: linear-gradient(to right, rgba(66, 165, 245, 0.05), rgba(126, 87, 194, 0.05));
    display: inline-block;
    margin-left: auto;
    margin-right: auto;
    font-weight: 500;
    box-shadow: none;
    border: 1px solid rgba(66, 165, 245, 0.15);
    opacity: 0.9;
}

.emoji-grid {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(42px, 1fr)) !important;
    grid-auto-rows: 42px !important;
    gap: 6px !important;
    padding: 12px !important;
    border-radius: 6px !important;
    border: 1px solid var(--input-border) !important;
    background-color: var(--secondary-bg) !important;
    box-shadow: none !important;
    transition: all 0.2s ease !important;
    margin-bottom: 10px !important;
    width: 100% !important;
    max-height: none !important;
    overflow: visible !important;
    max-width: 100% !important;
}

.emoji-category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
    width: 100%;
    justify-content: center;
}

.emoji-category-tab {
    padding: 6px 12px;
    background: var(--button-bg);
    border: 1px solid var(--input-border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-width: 120px;
    white-space: nowrap;
}

.emoji-category-tab.active,
.emoji-category-tab:hover {
    background: var(--accent-color);
    color: white;
}

#emoji-grid-container,
.emoji-grid-container {
    width: 100% !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: stretch !important;
    background-color: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    box-shadow: none !important;
    overflow: visible !important;
    min-height: 0 !important;
    max-width: 100% !important;
    border-bottom: none !important;
    border-top: none !important;
}

.emoji-button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    font-size: 1.5rem;
    background-color: var(--button-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
    position: relative;
    overflow: hidden;
    line-height: 1;
}

.emoji-button:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, var(--special-color), var(--encoding-color));
    opacity: 0;
    transition: opacity 0.2s ease;
}

.emoji-button:hover {
    background-color: var(--button-hover-bg);
    border-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.emoji-button:hover:before {
    opacity: 1;
}

.emoji-button:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    background: var(--button-bg);
    border-color: var(--accent-color);
    transform: scale(0.98);
}

/* Emoji Library Footer */
.emoji-library-footer {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--input-border);
}

.selected-emoji-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.selected-emoji {
    font-size: 1.5rem;
    padding: 4px 8px;
    background-color: var(--secondary-bg);
    border-radius: 6px;
    border: 1px solid var(--input-border);
}

.selected-emoji-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
}

.emoji-button.selected {
    background-color: var(--accent-color);
    color: var(--main-bg-color);
    border-color: var(--accent-color);
}

.emoji-category-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    overflow-x: auto;
    padding-bottom: 4px;
}

.emoji-category-tab {
    padding: 6px 12px;
    background-color: var(--button-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    color: var(--text-color);
    font-size: 0.8rem;
    cursor: pointer;
    white-space: nowrap;
}

.emoji-category-tab.active {
    background-color: var(--accent-color);
    color: var(--main-bg-color);
    border-color: var(--accent-color);
}

textarea::placeholder {
    color: rgba(224, 224, 224, 0.5);
}

textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: var(--focus-shadow);
}

button:focus-visible {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: var(--focus-shadow);
}

button:active {
    transform: translateY(1px);
}

/* Invisible Text Button */
.invisible-button {
    width: 100%;
    margin-top: 12px;
    padding: 12px;
    background-color: var(--secondary-bg);
    border: 2px dashed var(--accent-color);
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    position: relative;
}

.invisible-button .carrier-content {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.invisible-button .carrier-emoji {
    font-size: 1.5rem;
    margin-right: 12px;
}

.invisible-button:hover {
    background-color: rgba(var(--accent-color-rgb), 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.invisible-button.active {
    background-color: var(--accent-color);
    color: var(--main-bg-color);
    border-style: solid;
}

button {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--button-border);
    border-radius: 4px;
    padding: 8px 16px;
    cursor: pointer;
    font-family: 'Courier New', monospace;
    transition: all 0.3s;
}

/* Copy button styling moved to a single definition below */

button:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
}

/* Emoji grid */


/* Transform layout */
.transform-layout {
    display: grid;
    gap: 24px;
    margin-top: 16px;
}

.transform-section {
    background: var(--main-bg-color);
    border-radius: 8px;
    padding: 16px;
    border: 1px solid var(--input-border);
}

/* Transform category legend styling */
.transform-category-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--input-border);
}

.legend-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-color);
    margin-right: 8px;
    opacity: 0.7;
}

.legend-item {
    font-size: 0.8rem;
    padding: 4px 8px;
    border-radius: 4px;
    border-left-width: 4px;
    border-left-style: solid;
    background-color: var(--button-bg);
    transition: all 0.2s ease;
    cursor: default;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.legend-item:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.transform-section:focus-within {
    border-color: var(--accent-color);
    box-shadow: var(--focus-shadow);
}

.input-section,
.transform-section,
.output-section {
    background: var(--main-bg-color);
    border-radius: 6px;
    padding: 16px;
}

.transform-section h4 {
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent-color);
}

.transform-categories {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.transform-category-section {
    background: var(--secondary-bg);
    border-radius: 8px;
    padding: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.category-title {
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--input-border);
    font-size: 1.1rem;
    font-weight: 500;
    padding-left: 8px;
}

.transform-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    margin-bottom: 16px;
}

/* Carrier styling */
.carrier-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
}

.carrier-emoji {
    font-size: 1.5rem;
    line-height: 1;
    display: block;
    margin-bottom: 2px;
}

.carrier-name {
    font-size: 0.85rem;
    font-weight: 500;
}

/* Preview styling */
.transform-preview {
    margin-top: auto;
    width: 100%;
    font-size: 0.65rem;
    padding: 3px 4px;
    background-color: rgba(0, 0, 0, 0.12);
    border-radius: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.15;
    max-width: 100%;
    display: block;
    border: 1px solid rgba(0, 0, 0, 0.06);
    opacity: 0.85;
}

.preview-label {
    color: var(--accent-color);
    opacity: 0.8;
    font-weight: 500;
    display: block;
    margin-bottom: 2px;
}

.preview-ellipsis {
    color: var(--accent-color);
    font-weight: bold;
}

/* Encoded preview styling */
.encoded-preview {
    display: block;
    padding: 6px 8px;
    background-color: rgba(0, 0, 0, 0.25);
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    word-break: break-all;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: 0.5px;
    margin-top: 4px;
    color: var(--accent-color);
    border: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 0.85rem;
}

.transform-button kbd {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

/* Copy History Panel */
.copy-history-panel {
    position: fixed;
    right: -400px; /* Start offscreen */
    top: 0;
    width: 380px;
    height: 100vh;
    background-color: var(--secondary-bg);
    border-left: 1px solid var(--input-border);
    z-index: 100;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.3);
    transition: right 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.copy-history-panel.active {
    right: 0;
}

.copy-history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid var(--input-border);
    background-color: var(--button-bg);
}

.copy-history-header h3 {
    font-size: 1.2rem;
    margin: 0;
    color: var(--accent-color);
}

.copy-history-header .close-button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
}

.copy-history-header .close-button:hover {
    color: var(--accent-color);
}

.copy-history-content {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

.no-history {
    padding: 20px;
    text-align: center;
    color: var(--text-color);
    opacity: 0.7;
}

.history-items {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.history-item {
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-left: 3px solid var(--accent-color);
    border-radius: 4px;
    padding: 10px;
    transition: all 0.2s ease;
}

.history-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.history-source {
    font-weight: bold;
    color: var(--accent-color);
}

.history-time {
    color: var(--text-color);
    opacity: 0.7;
}

.history-content {
    background-color: var(--main-bg-color);
    padding: 10px;
    border-radius: 4px;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 150px;
    overflow-y: auto;
    font-family: monospace;
    font-size: 0.9rem;
    color: var(--text-color);
}

.history-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: 8px;
}

.copy-again-button {
    background-color: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 5px 10px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-again-button:hover {
    background-color: var(--button-hover-bg);
    color: var(--accent-color);
}

.history-button {
    background: none;
    color: var(--text-color);
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    margin-right: 8px;
    transition: all 0.2s ease;
}

.history-button:hover {
    background-color: var(--button-hover-bg);
    color: var(--accent-color);
}



.transform-name {
    font-weight: 500;
    color: var(--text-color);
}

.transform-preview {
    font-size: 0.75rem;
    font-family: 'Fira Code', monospace;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 100%;
    max-width: 180px;
    padding: 3px 6px;
    border-radius: 3px;
    background-color: rgba(0, 0, 0, 0.2);
    margin-top: 4px;
    transition: all 0.2s ease;
}

.transform-category-encoding .transform-preview {
    color: rgba(126, 87, 194, 0.9);
}

.transform-category-cipher .transform-preview {
    color: rgba(38, 166, 154, 0.9);
}

.transform-category-visual .transform-preview {
    color: rgba(239, 83, 80, 0.9);
}

.transform-category-format .transform-preview {
    color: rgba(255, 183, 77, 0.9);
}

.transform-category-unicode .transform-preview {
    color: rgba(66, 165, 245, 0.9);
}

.transform-category-special .transform-preview {
    color: rgba(102, 187, 106, 0.9);
}

.transform-button:hover .transform-preview {
    background-color: rgba(0, 0, 0, 0.18);
    opacity: 1;
}

.transform-button.active .transform-preview {
    background-color: rgba(0, 0, 0, 0.3);
    color: rgba(255, 255, 255, 0.9);
}

.transform-button {
    padding: 8px;
    height: auto;
    border-radius: 4px;
    font-size: 0.8rem;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 110px;
    max-width: 100%;
    font-weight: 500;
    text-align: center;
    border: 1px solid var(--input-border);
    background: var(--button-bg);
    color: var(--text-color);
    transition: all 0.2s ease;
    overflow: hidden;
    min-height: 70px;
}

/* Transform category styling */
.transform-category-encoding {
    border-left: 4px solid var(--encoding-color);
    background: linear-gradient(to right, rgba(126, 87, 194, 0.05), var(--button-bg));
}

.transform-category-encoding:hover {
    background: linear-gradient(to right, rgba(126, 87, 194, 0.15), var(--button-hover-bg));
    border-color: var(--encoding-color);
    box-shadow: 0 3px 10px rgba(126, 87, 194, 0.2);
}

.transform-category-cipher {
    border-left: 4px solid var(--cipher-color);
    background: linear-gradient(to right, rgba(38, 166, 154, 0.05), var(--button-bg));
}

.transform-category-cipher:hover {
    background: linear-gradient(to right, rgba(38, 166, 154, 0.15), var(--button-hover-bg));
    border-color: var(--cipher-color);
    box-shadow: 0 3px 10px rgba(38, 166, 154, 0.2);
}

.transform-category-visual {
    border-left: 4px solid var(--visual-color);
    background: linear-gradient(to right, rgba(239, 83, 80, 0.05), var(--button-bg));
}

.transform-category-visual:hover {
    background: linear-gradient(to right, rgba(239, 83, 80, 0.15), var(--button-hover-bg));
    border-color: var(--visual-color);
    box-shadow: 0 3px 10px rgba(239, 83, 80, 0.2);
}

.transform-category-format {
    border-left: 4px solid var(--format-color);
    background: linear-gradient(to right, rgba(255, 183, 77, 0.05), var(--button-bg));
}

.transform-category-format:hover {
    background: linear-gradient(to right, rgba(255, 183, 77, 0.15), var(--button-hover-bg));
    border-color: var(--format-color);
    box-shadow: 0 3px 10px rgba(255, 183, 77, 0.2);
}

.transform-category-unicode {
    border-left: 4px solid var(--unicode-color);
    background: linear-gradient(to right, rgba(66, 165, 245, 0.05), var(--button-bg));
}

.transform-category-unicode:hover {
    background: linear-gradient(to right, rgba(66, 165, 245, 0.15), var(--button-hover-bg));
    border-color: var(--unicode-color);
    box-shadow: 0 3px 10px rgba(66, 165, 245, 0.2);
}

.transform-category-special {
    border-left: 4px solid var(--special-color);
    background: linear-gradient(to right, rgba(102, 187, 106, 0.05), var(--button-bg));
}

.transform-category-special:hover {
    background: linear-gradient(to right, rgba(102, 187, 106, 0.15), var(--button-hover-bg));
    border-color: var(--special-color);
    box-shadow: 0 3px 10px rgba(102, 187, 106, 0.2);
}

.transform-button:before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 2px solid transparent;
    border-radius: 6px;
    transition: all 0.2s ease;
    pointer-events: none;
}

.transform-button:hover {
    background: var(--button-hover-bg);
    border-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

.transform-button:hover:before {
    border-color: var(--accent-color);
    opacity: 0.4;
}

.transform-button.active {
    background: var(--button-active-bg);
    color: var(--main-bg-color);
    border-color: var(--button-active-bg);
    box-shadow: 0 2px 8px rgba(100, 181, 246, 0.25);
    transform: translateY(-1px);
}

.transform-button.active:before {
    border-color: var(--accent-color);
    opacity: 1;
}

/* Category-specific active states */
.transform-category-encoding.active {
    background: linear-gradient(to right, var(--encoding-color), #9575cd);
    border-color: var(--encoding-color);
    box-shadow: 0 3px 12px rgba(126, 87, 194, 0.4);
}

.transform-category-cipher.active {
    background: linear-gradient(to right, var(--cipher-color), #4db6ac);
    border-color: var(--cipher-color);
    box-shadow: 0 3px 12px rgba(38, 166, 154, 0.4);
}

.transform-category-visual.active {
    background: linear-gradient(to right, var(--visual-color), #e57373);
    border-color: var(--visual-color);
    box-shadow: 0 3px 12px rgba(239, 83, 80, 0.4);
}

.transform-category-format.active {
    background: linear-gradient(to right, var(--format-color), #ffcc80);
    border-color: var(--format-color);
    box-shadow: 0 3px 12px rgba(255, 183, 77, 0.4);
}

.transform-category-unicode.active {
    background: linear-gradient(to right, var(--unicode-color), #64b5f6);
    border-color: var(--unicode-color);
    box-shadow: 0 3px 12px rgba(66, 165, 245, 0.4);
}

.transform-category-special.active {
    background: linear-gradient(to right, var(--special-color), #81c784);
    border-color: var(--special-color);
    box-shadow: 0 3px 12px rgba(102, 187, 106, 0.4);
}

/* Add a subtle indicator for clickable buttons */
.transform-button:after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--accent-color);
    opacity: 0;
    transition: all 0.2s ease;
}

.transform-button.active:after {
    opacity: 0.8;
    width: 30px;
}

/* Auto-copy icon styling */
.auto-copy-icon {
    position: absolute;
    right: 8px;
    bottom: 8px;
    font-size: 0.8rem;
    opacity: 0.5;
    transition: all 0.2s ease;
}

.transform-button:hover .auto-copy-icon {
    opacity: 1;
    transform: scale(1.2);
    color: var(--accent-color);
}

/* Output section */
.output-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 16px;
    padding: 16px;
    background: var(--main-bg-color);
    border-radius: 6px;
    border: 1px solid var(--accent-color);
    box-shadow: 0 2px 12px rgba(100, 181, 246, 0.15);
}

.output-heading h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--success-color);
    margin-bottom: 8px;
    font-size: 1rem;
}

.output-heading h4 small {
    color: var(--accent-color);
    font-size: 0.8rem;
    margin-left: 8px;
    font-weight: normal;
    opacity: 0.8;
}

.output-instructions {
    font-size: 0.85rem;
    color: var(--text-color);
    opacity: 0.7;
    padding: 6px;
    border-radius: 4px;
    background-color: rgba(0, 0, 0, 0.2);
    margin-top: 8px;
}

.output-instructions i {
    color: var(--accent-color);
    margin-right: 6px;
}

.output-container {
    position: relative;
}

.copy-button {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 6px;
    background: var(--button-bg);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    color: var(--text-color);
    opacity: 0.8;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.copy-button:hover {
    background: var(--button-hover-bg);
    border-color: var(--accent-color);
    color: var(--accent-color);
    opacity: 1;
}

.copy-button:active {
    transform: translateY(1px);
}

.decoded-message {
    position: relative;
    padding: 12px;
    background: var(--input-bg);
    border-radius: 4px;
    margin-top: 12px;
    border: 1px solid var(--input-border);
    font-family: 'Fira Code', monospace;
    word-break: break-word;
}

/* Copy button hover styling is defined above */

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--accent-color);
    font-weight: 500;
}

.form-group label i {
    font-size: 1.1rem;
}

/* Section dividers */
.section-divider {
    border-top: 1px solid var(--section-divider);
    margin: 30px 0;
}

/* GitHub link */
.actions {
    display: flex;
    gap: 8px;
}

.theme-button,
.github-button {
    background: var(--button-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    border-radius: 4px;
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    text-decoration: none;
    width: 32px;
    height: 32px;
}

.theme-button:hover,
.github-button:hover {
    background: var(--button-hover-bg);
    border-color: var(--accent-color);
    transform: translateY(-1px);
}

.github-link:hover {
    background-color: var(--button-hover-bg);
    color: var(--button-hover-text);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .emoji-grid {
        grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
    }
    
    .emoji-button {
        min-width: 50px;
        height: 50px;
    }
    
    .tab-buttons {
        flex-direction: column;
    }
    
    .tab-buttons button {
        width: 100%;
        text-align: left;
    }
}