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

:root {
    /* Light Blue Theme Colors - Enhanced for better readability */
    --primary-blue: #2E7DD2;
    --primary-blue-light: #5A96E0;
    --primary-blue-dark: #1E5F9A;
    --accent-blue: #74B9E8;
    --accent-blue-light: #A0D2F0;
    --accent-blue-pale: #E8F4FD;
    --border-blue: #A5C4D8;
    --border-blue-light: #C2DAE8;
    --text-primary: #1A252F;
    --text-secondary: #4A5568;
    --text-muted: #718096;
    --bg-primary: #FFFFFF;
    --bg-secondary: #FAFCFE;
    --bg-tertiary: #F1F7FC;
    --shadow-light: rgba(46, 125, 210, 0.08);
    --shadow-medium: rgba(46, 125, 210, 0.15);
    --shadow-heavy: rgba(46, 125, 210, 0.25);
    --success-green: #22C55E;
    --warning-orange: #F59E0B;
    --error-red: #E74C3C;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    width: 95%;
}

/* Header Styles */
.header {
    padding: 25px 0;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-bottom: 2px solid var(--border-blue-light);
    box-shadow: 0 2px 20px var(--shadow-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.logo-text {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
    transition: all 0.3s ease;
    text-shadow: 0 2px 4px var(--shadow-light);
}

.logo-text:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

.logo-text:active {
    transform: scale(0.98);
}

.header-controls {
    display: flex;
    align-items: center;
}

/* Language dropdown button (modern look) */
#langDropdownButton {
    padding: 10px 14px;
    border: 2px solid var(--border-blue);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px var(--shadow-light);
    transition: all 0.2s ease;
    min-width: 56px;
    margin-right: 12px;
}

#langDropdownButton:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-color: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px var(--shadow-medium);
}

#langDropdownButton:active {
    transform: translateY(0) scale(0.96);
    box-shadow: 0 2px 8px var(--shadow-light);
}

body.dark-mode #langDropdownButton {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    color: #ffffff;
    border-color: #555;
}

body.dark-mode #langDropdownButton:hover {
    background: linear-gradient(135deg, #444 0%, #555 100%);
    border-color: var(--primary-blue);
}

.dark-mode-toggle {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--primary-blue);
    border: 2px solid var(--border-blue);
    padding: 12px;
    border-radius: 50%;
    cursor: pointer;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1000;
    box-shadow: 0 4px 15px var(--shadow-light);
}

.dark-mode-toggle:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-color: var(--primary-blue);
    transform: scale(1.05) rotate(5deg);
    box-shadow: 0 6px 20px var(--shadow-medium);
}

.dark-mode-toggle:active {
    transform: scale(0.95) rotate(-5deg);
}

.toggle-icon {
    position: relative;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sun-icon, .moon-icon {
    position: absolute;
    font-size: 20px;
    transition: all 0.3s ease;
    opacity: 1;
    transform: scale(1);
    pointer-events: none;
}

.moon-icon {
    opacity: 0;
    transform: scale(0.5) rotate(180deg);
}

/* Dark mode toggle states */
body.dark-mode .dark-mode-toggle {
    background: linear-gradient(135deg, #2d2d2d 0%, #444444 100%);
    border-color: var(--primary-blue);
    color: var(--accent-blue);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
}

body.dark-mode .dark-mode-toggle:hover {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    border-color: var(--accent-blue);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.4);
}

body.dark-mode .sun-icon {
    opacity: 0;
    transform: scale(0.5) rotate(-180deg);
}

body.dark-mode .moon-icon {
    opacity: 1;
    transform: scale(1) rotate(0deg);
}

/* Dark Mode Styles */
body.dark-mode {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    color: #ffffff;
}

body.dark-mode .header {
    border-bottom-color: #444444;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

body.dark-mode .logo-text {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-mode .container {
    background: transparent;
}

body.dark-mode .tool-card {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

body.dark-mode .tool-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 6px 25px rgba(74, 144, 226, 0.3);
    transform: translateY(-3px);
}

body.dark-mode .tool-title {
    color: #ffffff;
}

body.dark-mode .tool-description {
    color: #cccccc;
}

body.dark-mode .section-title {
    color: #ffffff;
}

body.dark-mode .section-title::after {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
}

body.dark-mode .main-title {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-mode .tagline {
    color: #cccccc;
}

body.dark-mode .description {
    color: #aaaaaa;
}

body.dark-mode .search-input {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    color: #ffffff;
}

body.dark-mode .search-input:focus {
    border-color: var(--primary-blue);
}

body.dark-mode .search-input::placeholder {
    color: #888888;
}

body.dark-mode .sidebar {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-right-color: #444444;
}

body.dark-mode .sidebar-title {
    color: #ffffff;
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    border-left-color: var(--primary-blue);
}

body.dark-mode .sidebar-menu a {
    color: #cccccc;
}

body.dark-mode .sidebar-menu a:hover {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
}

body.dark-mode .sidebar-menu a.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: white;
    box-shadow: 0 4px 15px var(--shadow-medium);
}

body.dark-mode .feature-content {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
}

body.dark-mode .feature-title {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-mode .feature-description {
    color: #cccccc;
}

body.dark-mode .text-input {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    color: #ffffff;
    scrollbar-color: #555555 transparent;
}

body.dark-mode .text-input::-webkit-scrollbar-thumb {
    background: #555555;
}

body.dark-mode .text-input::-webkit-scrollbar-thumb:hover {
    background: #777777;
}

body.dark-mode .text-input:focus {
    border-color: var(--primary-blue);
}

body.dark-mode .text-input::placeholder,
body.dark-mode .result-textarea::placeholder {
    color: #888888;
}

body.dark-mode .result-textarea {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    color: #ffffff;
    scrollbar-color: #555555 transparent;
}

body.dark-mode .result-textarea::-webkit-scrollbar-thumb {
    background: #555555;
}

body.dark-mode .result-textarea::-webkit-scrollbar-thumb:hover {
    background: #777777;
}

body.dark-mode .text-input-label {
    color: #ffffff;
}

body.dark-mode .textarea-container {
    border-color: #444444;
}

body.dark-mode .embedded-actions {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-top-color: #444444;
}

body.dark-mode .embedded-actions .action-button {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
    min-width: 120px;
}

body.dark-mode .embedded-actions .action-button:hover {
    background: linear-gradient(135deg, #555555 0%, #666666 100%);
    border-color: var(--primary-blue);
}

body.dark-mode .embedded-actions .action-button.upload {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
    font-weight: 600;
    min-width: 140px;
}

body.dark-mode .embedded-actions .action-button.upload:hover {
    background: linear-gradient(135deg, #555555 0%, #666666 100%);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.3);
}

body.dark-mode .result-title {
    color: #ffffff;
}

body.dark-mode .result-actions .action-button {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
    min-width: 120px;
}

body.dark-mode .result-actions .action-button:hover {
    background: linear-gradient(135deg, #555555 0%, #666666 100%);
    border-color: var(--primary-blue);
}

body.dark-mode .convert-button {
    background: linear-gradient(135deg, var(--warning-orange) 0%, #FFD700 100%);
    color: #000000;
    border: 2px solid var(--warning-orange);
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.3);
}

body.dark-mode .convert-button:hover {
    background: linear-gradient(135deg, #FFD700 0%, var(--warning-orange) 100%);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(243, 156, 18, 0.4);
    border-color: #FFD700;
}

body.dark-mode .convert-button:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 4px 15px rgba(243, 156, 18, 0.35);
}

.result-actions {
    justify-content: flex-start;
}

.result-actions .action-button {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    border-color: var(--border-blue);
    min-width: 120px;
}

.result-actions .action-button:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-color: var(--primary-blue);
}

/* ===== NUMBER INCREMENTER SPECIFIC STYLES ===== */
/* Only for Number Generator section - does not affect other features */

.number-incrementer-actions {
    justify-content: center !important;
}

/* Special textarea-container only for Number Incrementer */
.number-incrementer-container {
    display: flex;
    flex-direction: column;
}

.number-incrementer-container .result-textarea {
    flex: 1;
    min-height: 420px;
}

.number-params-simple {
    padding: 25px;
    padding-bottom: 100px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border: none;
    border-radius: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: all 0.3s ease;
    height: 100%;
    min-height: 420px;
    position: relative;
}



.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 15px;
}

.number-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-blue);
    border-radius: 10px;
    font-size: 16px;
    background: var(--bg-primary);
    transition: all 0.3s ease;
    outline: none;
}

.number-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 15px var(--shadow-light);
    transform: translateY(-1px);
}

.number-reset-btn {
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 12px;
    min-width: 120px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    border: 2px solid var(--border-blue);
    box-shadow: 0 4px 15px var(--shadow-light);
    transition: all 0.3s ease;
    cursor: pointer;
}

.number-reset-btn:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-medium);
}

/* Dark Mode for Number Incrementer Only */
body.dark-mode .number-params-simple {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
}

body.dark-mode .input-label {
    color: #ffffff;
}

body.dark-mode .number-input {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
}

body.dark-mode .number-input::placeholder {
    color: #888888;
}

body.dark-mode .number-input:focus {
    border-color: var(--primary-blue);
}

body.dark-mode .number-reset-btn {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
}

body.dark-mode .number-reset-btn:hover {
    background: linear-gradient(135deg, #555555 0%, #666666 100%);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.3);
}

/* ===== END NUMBER INCREMENTER STYLES ===== */

/* Dark Mode Hero Section */
body.dark-mode .hero-section {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

body.dark-mode .main-title {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Dark Mode Feature Header */
body.dark-mode .feature-header {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
}

body.dark-mode .feature-title {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Dark Mode Options */
body.dark-mode .split-options,
body.dark-mode .result-options,
body.dark-mode .side-options,
body.dark-mode .delete-mode-options,
body.dark-mode .processing-options {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

body.dark-mode .options-title {
    color: #ffffff;
    border-bottom-color: #444444;
}

body.dark-mode .option-label {
    color: #ffffff;
}

body.dark-mode .option-input {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
}

body.dark-mode .option-input::placeholder {
    color: #888888;
}

body.dark-mode .option-help {
    color: #aaaaaa;
}

body.dark-mode .checkbox-option {
    color: #ffffff;
}

body.dark-mode .empty-options {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a3a3a 100%);
    border-color: #444444;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

body.dark-mode .empty-options .options-title {
    color: #ffffff;
    border-bottom-color: #444444;
}

body.dark-mode .empty-options .options-description {
    color: #aaaaaa;
}

/* Dark Mode Radio and Checkbox Hover */
body.dark-mode .radio-option:hover,
body.dark-mode .checkbox-option:hover {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 100px);
}

/* Initial View Styles */
.initial-view {
    padding: 40px 0;
}

.hero-section {
    text-align: center;
    margin-bottom: 80px;
    padding: 60px 20px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-radius: 20px;
    box-shadow: 0 10px 40px var(--shadow-light);
    border: 2px solid var(--border-blue-light);
}

.main-title {
    font-size: 52px;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 4px var(--shadow-light);
    letter-spacing: -1.5px;
}

.tagline {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-weight: 500;
}

.description {
    font-size: 19px;
    color: var(--text-muted);
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.search-section {
    margin-bottom: 50px;
}

.search-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 18px 50px 18px 25px;
    border: 2px solid var(--border-blue);
    border-radius: 15px;
    font-size: 16px;
    outline: none;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    box-shadow: 0 4px 15px var(--shadow-light);
}

.search-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 6px 25px var(--shadow-medium);
    transform: translateY(-2px);
}

.search-clear {
    position: absolute;
    right: 15px;
    background: none;
    border: none;
    font-size: 16px;
    color: #999;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: all 0.2s ease;
    z-index: 2;
}

.search-clear:hover {
    background: #f0f0f0;
    color: #666;
}

body.dark-mode .search-clear:hover {
    background: #444;
    color: #ccc;
}

/* Tools Section */
.tools-section {
    margin-bottom: 80px;
}

.section-title {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 35px;
    color: var(--text-primary);
    text-align: center;
    position: relative;
    padding-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    border-radius: 2px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.tool-card {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border: 2px solid var(--border-blue-light);
    border-radius: 18px;
    padding: 32px 24px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 6px 25px var(--shadow-light), 0 2px 8px rgba(0, 0, 0, 0.08);
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(74, 144, 226, 0.1), transparent);
    transition: left 0.5s ease;
}

.tool-card:hover::before {
    left: 100%;
}

.tool-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 12px 40px var(--shadow-medium), 0 4px 12px rgba(0, 0, 0, 0.12);
    transform: translateY(-6px);
}

.tool-card:active {
    transform: translateY(-2px) scale(0.98);
}

.tool-title {
    font-size: 19px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
    position: relative;
    z-index: 1;
    letter-spacing: -0.3px;
}

.tool-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.5;
    position: relative;
    z-index: 1;
    font-weight: 400;
}

/* Feature View Styles */
.feature-view {
    display: flex;
    min-height: calc(100vh - 100px);
}

/* Sidebar Styles */
.sidebar {
    width: 300px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border-right: 2px solid var(--border-blue-light);
    padding: 30px 20px;
    overflow-y: auto;
    box-shadow: 5px 0 20px var(--shadow-light);
}

.sidebar-header {
    margin-bottom: 40px;
}

.sidebar-section {
    margin-bottom: 35px;
}

.sidebar-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 15px;
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-radius: 10px;
    border-left: 4px solid var(--primary-blue);
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 10px;
}

.sidebar-menu a {
    display: block;
    padding: 12px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
    font-weight: 500;
}

.sidebar-menu a:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    border-color: var(--border-blue);
    transform: translateX(5px);
}

.sidebar-menu a.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: white;
    box-shadow: 0 4px 15px var(--shadow-medium);
}

/* Feature Content */
.feature-content {
    flex: 1;
    padding: 30px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    max-width: calc(100vw - 300px);
}

.feature-header {
    margin-bottom: 50px;
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--accent-blue-pale) 100%);
    border-radius: 20px;
    border: 2px solid var(--border-blue-light);
}

.feature-title {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto;
}

/* Text Input and Output */
.text-input-section {
    margin-bottom: 0;
    padding: 0;
}

.text-input-label {
    display: block;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
    padding: 10px 0;
}

.textarea-container {
    position: relative;
    border: 2px solid var(--border-blue);
    border-radius: 18px;
    overflow: visible;
    margin: 0;
    padding: 0;
    box-shadow: 0 8px 25px var(--shadow-light);
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.textarea-container:focus-within {
    border-color: var(--primary-blue);
    box-shadow: 0 12px 35px var(--shadow-medium);
    transform: translateY(-2px);
}

.text-input {
    width: 100%;
    min-height: 400px;
    padding: 25px;
    padding-bottom: 100px;
    border: none;
    border-radius: 18px;
    font-size: 16px;
    font-family: inherit;
    resize: none;
    outline: none;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-blue) transparent;
    scroll-behavior: smooth;
    scroll-snap-type: none;
}

.text-input::-webkit-scrollbar {
    width: 8px;
}

.text-input::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 4px;
}

.text-input::-webkit-scrollbar-thumb {
    background: var(--border-blue);
    border-radius: 4px;
    transition: background 0.3s ease;
}

.text-input::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue);
}

.text-input::-webkit-scrollbar-button {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
}

.text-input::-webkit-scrollbar-button:start:decrement,
.text-input::-webkit-scrollbar-button:end:increment {
    display: none !important;
}

.embedded-actions {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    gap: 15px;
    padding: 20px 25px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--accent-blue-pale) 100%);
    border-top: 2px solid var(--border-blue-light);
    border-bottom-left-radius: 18px;
    border-bottom-right-radius: 18px;
    justify-content: flex-start;
    z-index: 10;
    box-sizing: border-box;
}

.embedded-actions .action-button {
    padding: 12px 20px;
    border: 2px solid var(--border-blue);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s ease;
    min-width: 120px;
    box-shadow: 0 4px 15px var(--shadow-light);
}

.embedded-actions .action-button:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-medium);
}

.embedded-actions .action-button:active {
    transform: translateY(0) scale(0.96);
    box-shadow: 0 2px 10px var(--shadow-light);
}

.embedded-actions .action-button.upload {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    border-color: var(--border-blue);
    font-weight: 600;
    min-width: 140px;
}

.embedded-actions .action-button.upload:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--shadow-medium);
}

.text-input:focus {
    border-color: var(--primary-blue);
}

.convert-button {
    background: linear-gradient(135deg, var(--warning-orange) 0%, #FFD700 100%);
    color: #000000;
    border: 2px solid var(--warning-orange);
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 25px auto;
    display: block;
    width: fit-content;
    box-shadow: 0 6px 20px rgba(243, 156, 18, 0.25);
    text-transform: none;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.convert-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.convert-button:hover::before {
    left: 100%;
}

.convert-button:hover {
    background: linear-gradient(135deg, #FFD700 0%, var(--warning-orange) 100%);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(243, 156, 18, 0.35);
    border-color: #FFD700;
}

.convert-button:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 4px 15px rgba(243, 156, 18, 0.3);
}

/* Result Section */
.result-section {
    margin-bottom: 0;
    padding: 0;
}

.result-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
    padding: 10px 0;
}

.result-textarea {
    width: 100%;
    min-height: 400px;
    padding: 25px;
    padding-bottom: 100px;
    border: none;
    border-radius: 18px;
    font-size: 16px;
    font-family: inherit;
    resize: none;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    outline: none;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-blue) transparent;
    scroll-behavior: smooth;
    scroll-snap-type: none;
}

.result-textarea::-webkit-scrollbar {
    width: 8px;
}

.result-textarea::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 4px;
}

.result-textarea::-webkit-scrollbar-thumb {
    background: var(--border-blue);
    border-radius: 4px;
    transition: background 0.3s ease;
}

.result-textarea::-webkit-scrollbar-thumb:hover {
    background: var(--primary-blue);
}

.result-textarea::-webkit-scrollbar-button {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
}

.result-textarea::-webkit-scrollbar-button:start:decrement,
.result-textarea::-webkit-scrollbar-button:end:increment {
    display: none !important;
}

/* Remove scrollbar arrow buttons globally */
textarea::-webkit-scrollbar-button {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
}

textarea::-webkit-scrollbar-button:start:decrement,
textarea::-webkit-scrollbar-button:end:increment {
    display: none !important;
}

/* Force remove all scrollbar buttons */
textarea::-webkit-scrollbar-button:single-button {
    display: none !important;
}

textarea::-webkit-scrollbar-button:double-button {
    display: none !important;
}

textarea::-webkit-scrollbar-button:single-button:start:decrement,
textarea::-webkit-scrollbar-button:single-button:end:increment,
textarea::-webkit-scrollbar-button:double-button:start:decrement,
textarea::-webkit-scrollbar-button:double-button:end:increment {
    display: none !important;
}

/* Four Grid Layout */
.four-grid-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 40px;
    margin: 30px 0;
    padding: 0;
    align-items: start;
    justify-items: stretch;
}

.four-grid-layout .text-input-section {
    grid-column: 1;
    grid-row: 1;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.four-grid-layout .result-section {
    grid-column: 2;
    grid-row: 1;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.four-grid-layout .text-input-section .textarea-container,
.four-grid-layout .result-section .textarea-container {
    margin: 0;
    padding: 0;
}

.text-io-container .text-input-section,
.text-io-container .result-section {
    margin: 0;
    padding: 0;
}

.text-io-container .textarea-container {
    margin: 0;
    padding: 0;
}

.four-grid-layout .split-options {
    grid-column: 1;
    grid-row: 2;
}

.four-grid-layout .result-options {
    grid-column: 2;
    grid-row: 2;
}

/* Text Input/Output Container */
.text-io-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 30px 0;
    padding: 0;
}

/* Input-Output Layout for Number Incrementer and similar features */
.input-output-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 30px 0;
    padding: 0;
    align-items: start;
}

.input-output-layout .input-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-output-layout .number-inputs-container {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-output-layout .input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.input-output-layout .input-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.input-output-layout .number-input {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.3s ease;
}

.input-output-layout .number-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-output-layout .number-reset-btn {
    padding: 10px 20px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    align-self: flex-start;
}

.input-output-layout .number-reset-btn:hover {
    background: var(--primary-blue);
    border-color: var(--primary-blue);
    color: white;
}

/* Options Container */
.options-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 30px 0;
}

/* Split Options and Result Options */
.split-options,
.result-options,
.side-options,
.delete-mode-options,
.processing-options {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    border: 2px solid var(--border-blue-light);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 25px var(--shadow-light);
    transition: all 0.3s ease;
}

.split-options:hover,
.result-options:hover,
.side-options:hover,
.delete-mode-options:hover,
.processing-options:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 12px 35px var(--shadow-medium);
    transform: translateY(-2px);
}

.options-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-blue-light);
}

.options-grid {
    display: grid;
    gap: 25px;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 15px;
}

.radio-group {
    display: flex;
    gap: 25px;
}

.radio-group-vertical {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 8px 15px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.radio-option:hover {
    background: var(--accent-blue-pale);
}

.radio-option input[type="radio"] {
    margin: 0;
    accent-color: var(--primary-blue);
    transform: scale(1.2);
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 8px 15px;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.checkbox-option:hover {
    background: var(--accent-blue-pale);
}

.checkbox-option input[type="checkbox"] {
    margin: 0;
    accent-color: var(--primary-blue);
    transform: scale(1.2);
}

.option-input {
    padding: 12px 15px;
    border: 2px solid var(--border-blue);
    border-radius: 10px;
    font-size: 14px;
    outline: none;
    transition: all 0.3s ease;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.option-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 4px 15px var(--shadow-light);
    transform: translateY(-1px);
}

.option-help {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.5;
}

/* Empty Options for Letter Case */
.empty-options {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--accent-blue-pale) 100%);
    border: 2px solid var(--border-blue-light);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 25px var(--shadow-light);
    transition: all 0.3s ease;
}

.empty-options:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 12px 35px var(--shadow-medium);
    transform: translateY(-2px);
}

.empty-options .options-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-blue-light);
}

.empty-options .options-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}



/* Large Screen Optimizations */
@media (min-width: 1600px) {
    .container {
        max-width: 1600px;
        width: 90%;
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
        gap: 35px;
    }
    
    .four-grid-layout,
    .text-io-container,
    .input-output-layout,
    .options-container {
        gap: 50px;
    }
    
    .feature-content {
        padding: 40px;
        max-width: calc(100vw - 320px);
    }
    
    .text-input,
    .result-textarea {
        min-height: 450px;
    }
}

@media (min-width: 1200px) and (max-width: 1599px) {
    .container {
        width: 92%;
    }
    
    .feature-content {
        max-width: calc(100vw - 300px);
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    }
}

/* Tablet optimizations */
@media (min-width: 769px) and (max-width: 1199px) {
    .container {
        width: 95%;
        padding: 0 25px;
    }
    
    .feature-content {
        padding: 25px;
        max-width: calc(100vw - 280px);
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 25px;
    }
    
    .four-grid-layout,
    .text-io-container,
    .input-output-layout {
        gap: 30px;
    }
    
    .sidebar {
        width: 280px;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Mobile feature content positioning */
    .feature-content {
        order: 1;
        max-width: 100%;
        padding: 15px;
    }
    
    .sidebar {
        order: 2;
        padding: 15px;
    }
    
    .four-grid-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 15px;
    }
    
    .four-grid-layout .text-input-section,
    .four-grid-layout .result-section,
    .four-grid-layout .split-options,
    .four-grid-layout .result-options {
        grid-column: 1;
        grid-row: auto;
    }
    
    .text-io-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .input-output-layout {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .options-container {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .container {
        padding: 0 10px;
        width: 100%;
    }
    
    .main-title {
        font-size: 38px;
        margin-bottom: 10px;
    }
    
    .tagline {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .description {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .tool-card {
        padding: 15px;
        border-radius: 12px;
        transition: all 0.3s ease;
    }
    
    .tool-card:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    }
    
    .tool-title {
        font-size: 16px;
        margin-bottom: 8px;
    }
    
    .tool-description {
        font-size: 13px;
        line-height: 1.4;
    }
    
    .feature-view {
        flex-direction: column;
        gap: 20px;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 2px solid var(--border-blue-light);
        padding: 15px;
    }
    
    .feature-content {
        padding: 15px;
    }
    
    .text-input {
        min-height: 250px;
        padding: 15px;
        padding-bottom: 70px;
        border-radius: 12px;
        font-size: 14px;
        line-height: 1.5;
    }
    
    .result-textarea {
        min-height: 250px;
        padding: 15px;
        border-radius: 12px;
        font-size: 14px;
        line-height: 1.5;
    }
    
    .convert-button {
        padding: 12px 24px;
        font-size: 16px;
        border-radius: 10px;
        margin: 15px 0;
    }
    
    .hero-section {
        padding: 30px 15px;
        margin-bottom: 40px;
        text-align: center;
    }
    
    .feature-header {
        padding: 20px 15px;
        margin-bottom: 30px;
        text-align: center;
    }
    
    .search-section {
        margin: 20px 0;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .search-input {
        padding: 12px 16px;
        font-size: 14px;
        border-radius: 10px;
    }
    
    .feature-title {
        font-size: 28px;
    }
    
    .feature-description {
        font-size: 16px;
    }
    
    .text-input,
    .result-textarea {
        min-height: 300px;
        padding: 20px;
        padding-bottom: 80px;
    }
    
    /* Mobile button optimizations */
    .embedded-actions {
        flex-wrap: wrap;
        gap: 8px;
        padding: 12px 15px;
        justify-content: center;
        align-items: center;
    }
    
    .embedded-actions .action-button {
        flex: 0 0 auto;
        min-width: 70px;
        max-width: 110px;
        padding: 8px 12px;
        font-size: 12px;
        white-space: nowrap;
        border-radius: 8px;
        height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .embedded-actions .action-button.upload {
        min-width: 75px;
        max-width: 115px;
    }
    
    .result-actions {
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    
    .result-actions .action-button {
        flex: 1 1 auto;
        min-width: 100px;
        max-width: 150px;
    }
    
    .convert-button {
        width: 100%;
        max-width: 300px;
        padding: 12px 20px;
        font-size: 15px;
        margin: 20px auto;
    }
    
    /* Mobile styles for Number Incrementer only */
    .number-params-simple {
        min-height: 320px;
        padding: 20px;
        padding-bottom: 60px;
    }
    
    .number-reset-btn {
        padding: 10px 20px;
        font-size: 13px;
        min-width: 100px;
    }
    
    .input-group {
        gap: 6px;
    }
    
    .input-label {
        font-size: 14px;
    }
    
    .number-input {
        padding: 10px 12px;
        font-size: 15px;
    }
    
    /* Mobile improvements for tool cards */
    .tool-card {
        padding: 25px 20px;
        margin-bottom: 20px;
    }
    
    .tool-title {
        font-size: 18px;
    }
    
    .tool-description {
        font-size: 14px;
    }
    
    /* Mobile improvements for search */
    .search-input {
        padding: 15px 20px;
        font-size: 16px;
    }
    
    /* Mobile improvements for sidebar */
    .sidebar {
        padding: 20px 15px;
    }
    
    .sidebar-title {
        font-size: 16px;
        padding: 8px 12px;
    }
    
    .sidebar-menu a {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    /* Mobile header optimizations */
    .header {
        padding: 20px 0;
    }
    
    .header-controls {
        gap: 10px;
    }
    
    #langDropdownButton {
        padding: 8px 12px;
        font-size: 13px;
        min-width: 50px;
        margin-right: 8px;
    }
    
    .dark-mode-toggle {
        width: 44px;
        height: 44px;
        padding: 10px;
    }
    
    .logo-text {
        font-size: 28px;
    }
}

/* Mobile landscape mode optimizations */
@media (max-width: 768px) and (orientation: landscape) {
    .embedded-actions {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 6px;
        padding: 8px 12px;
        justify-content: center;
        align-items: center;
    }
    
    .embedded-actions .action-button {
        flex: 0 0 auto;
        min-width: 60px;
        max-width: 90px;
        padding: 6px 10px;
        font-size: 10px;
        white-space: nowrap;
        border-radius: 6px;
        height: 32px;
    }
    
    .embedded-actions .action-button.upload {
        min-width: 65px;
        max-width: 95px;
    }
    
    .result-actions .action-button {
        flex: 0 0 auto;
        min-width: 90px;
        max-width: 120px;
    }
    
    .text-input,
    .result-textarea {
        min-height: 250px;
        padding-bottom: 70px;
    }
    
    .feature-content {
        padding: 15px;
    }
    
    .convert-button {
        max-width: 250px;
        padding: 10px 16px;
        font-size: 14px;
        margin: 15px auto;
    }
}

/* Additional responsive breakpoints */
@media (max-width: 480px) {
    .main-title {
        font-size: 36px;
    }
    
    .tagline {
        font-size: 18px;
    }
    
    .description {
        font-size: 16px;
    }
    
    .hero-section {
        padding: 30px 15px;
        margin-bottom: 40px;
    }
    
    .tools-section {
        margin-bottom: 60px;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 30px;
    }
    
    .tool-card {
        padding: 20px 15px;
    }
    
    .feature-content {
        padding: 20px 15px;
    }
    
    .feature-header {
        padding: 25px 15px;
        margin-bottom: 30px;
    }
    
    .feature-title {
        font-size: 24px;
    }
    
    .feature-description {
        font-size: 15px;
    }
    
    /* Extra small screen button optimizations */
    .embedded-actions {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px;
        padding: 6px 8px;
        justify-content: center;
        align-items: center;
    }
    
    .embedded-actions .action-button {
        flex: 0 0 auto;
        min-width: 50px;
        max-width: 75px;
        padding: 4px 8px;
        font-size: 9px;
        white-space: nowrap;
        border-radius: 5px;
        height: 28px;
    }
    
    .embedded-actions .action-button.upload {
        min-width: 55px;
        max-width: 80px;
    }
    
    .convert-button {
        max-width: 280px;
        font-size: 14px;
    }
    
    /* Header optimizations for very small screens */
    .header {
        padding: 15px 0;
    }
    
    .logo-text {
        font-size: 24px;
    }
    
    #langDropdownButton {
        padding: 6px 10px;
        font-size: 12px;
        min-width: 45px;
        margin-right: 6px;
    }
    
    .dark-mode-toggle {
        width: 40px;
        height: 40px;
        padding: 8px;
    }
}

/* Animation for view transitions */
.initial-view, .feature-view {
    animation: fadeIn 0.4s ease-in-out;
}

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

/* Additional hover effects for tool cards */
.tool-card:hover .tool-title {
    color: var(--primary-blue);
}

.tool-card:hover .tool-description {
    color: var(--text-primary);
}

/* Dark mode for select elements and dropdowns */
body.dark-mode select,
body.dark-mode select.number-input,
body.dark-mode select.text-input {
    background: linear-gradient(135deg, #444444 0%, #555555 100%);
    color: #ffffff;
    border-color: #666666;
}

body.dark-mode select option,
body.dark-mode select.number-input option,
body.dark-mode select.text-input option {
    background: #444444;
    color: #ffffff;
}

body.dark-mode select:focus,
body.dark-mode select.number-input:focus,
body.dark-mode select.text-input:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

/* Hover effects for dark mode tool cards */
body.dark-mode .tool-card:hover .tool-title {
    color: var(--primary-blue);
}

body.dark-mode .tool-card:hover .tool-description {
    color: #e0e0e0; /* Daha açık gri, okunabilir */
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
}

/* Notification animations */
@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification {
    animation: slideIn 0.3s ease;
}

/* Download Dropdown Styles */
.download-dropdown {
    position: relative;
    display: inline-block;
    z-index: 4000;
}



.download-dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: #ffffff;
    min-width: 180px;
    box-shadow: 0px 20px 40px rgba(0,0,0,0.18), 0 2px 8px rgba(0,0,0,0.08);
    border-radius: 12px;
    z-index: 5000;
    border: 1px solid var(--border-blue-light);
    margin-top: 8px;
    opacity: 0;
    transform: translateY(-8px) scale(0.98);
    transition: opacity 0.18s ease, transform 0.18s ease;
    pointer-events: none;
    overflow: hidden;
    backdrop-filter: blur(8px);
    background-image: linear-gradient(135deg, rgba(255,255,255,0.9) 0%, rgba(245,250,255,0.95) 100%);
}

.download-dropdown-content.show {
    display: block;
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

/* Open upward for embedded action bar to avoid overlapping with convert button */
.embedded-actions .download-dropdown .download-dropdown-content {
    top: auto;
    bottom: 100%;
    margin-top: 0;
    margin-bottom: 8px;
    transform: translateY(8px);
}
.embedded-actions .download-dropdown .download-dropdown-content.show {
    transform: translateY(0);
}

.download-option {
    color: var(--text-primary);
    padding: 12px 14px;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: background-color 0.18s ease, color 0.18s ease, transform 0.18s ease;
    font-size: 14px;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
}

.download-option:hover {
    background: linear-gradient(135deg, var(--accent-blue-pale) 0%, var(--bg-secondary) 100%);
    transform: translateX(2px);
}

.download-option:first-child {
    border-radius: 8px 8px 0 0;
}

.download-option:last-child {
    border-radius: 0 0 8px 8px;
}

.download-option:only-child {
    border-radius: 8px;
}

/* Active item state (e.g., current language) */
.download-option.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: #ffffff;
}
.download-option.active::after {
    content: '✓';
    margin-left: auto;
    font-weight: 700;
}

/* Flag emojis for language menu without changing HTML */
#langDropdownContent .download-option[data-lang="en"]::before { content: '🇬🇧'; }
#langDropdownContent .download-option[data-lang="tr"]::before { content: '🇹🇷'; }

/* Dropdown arrow caret */
.download-dropdown-content::before {
    content: '';
    position: absolute;
    top: -8px;
    right: 16px;
    border-width: 0 8px 8px 8px;
    border-style: solid;
    border-color: transparent transparent #ffffff transparent;
    filter: drop-shadow(0 -2px 2px rgba(0,0,0,0.06));
}

/* Upward-opening caret for embedded action bar */
.embedded-actions .download-dropdown .download-dropdown-content::before {
    top: auto;
    bottom: -8px;
    border-width: 8px 8px 0 8px;
    border-color: #ffffff transparent transparent transparent;
}

/* Dark mode dropdown */
body.dark-mode .download-dropdown-content {
    background-color: rgba(44,62,80,0.98);
    border-color: #555;
    background-image: none;
}

body.dark-mode .download-option {
    color: #ecf0f1;
}

body.dark-mode .download-option:hover {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
}

body.dark-mode .download-option.active {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--accent-blue) 100%);
    color: #ffffff;
}