/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: transparent;
    min-height: 100vh;
    color: #1f2937;
    overflow-x: auto;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
}

/* Language Selector */
.language-selector {
    position: fixed;
    top: 4.5rem;
    right: 20px;
    z-index: 150;
}

.language-btn {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 10px 15px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.language-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
}

.language-btn .flag {
    font-size: 16px;
}

.language-btn .lang-code {
    font-weight: 600;
}

.language-btn i {
    transition: transform 0.3s ease;
    color: #2563eb;
}

.language-dropdown.show .language-btn i {
    transform: rotate(180deg);
}

.language-dropdown {
    position: relative;
}

.language-dropdown .dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    margin-top: 5px;
}

.language-dropdown.show .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    padding: 12px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: rgba(37, 99, 235, 0.1);
}

.language-option .flag {
    font-size: 18px;
}

.language-option .lang-name {
    font-weight: 500;
    color: #333;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 1.5rem;
    background: #fff;
    padding: 1.5rem 2rem;
    border-radius: 0.75rem;
    border: 1px solid #e5e7eb;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
}

.header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #111827;
    text-shadow: none;
}

.header h1 i {
    margin-right: 0.5rem;
    color: #2563eb;
}

.header p {
    font-size: 1rem;
    color: #6b7280;
    font-weight: 400;
}

/* Main Content */
.main-content {
    display: grid;
    gap: 25px;
    grid-template-columns: 1fr;
}

/* Quick Settings Panel */
.quick-settings {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 20px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    align-items: center;
    justify-content: space-between;
}

.setting-group {
    display: flex;
    align-items: center;
    gap: 15px;
}

.setting-group label {
    font-weight: 500;
    color: #555;
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-group i {
    color: #2563eb;
}

#layout-select {
    padding: 10px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 10px;
    background: white;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    transition: all 0.3s ease;
    min-width: 150px;
}

#layout-select:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Toggle Settings */
.toggle-setting {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
}

.toggle-setting input {
    display: none;
}

.toggle-slider-mini {
    width: 40px;
    height: 20px;
    background: #ccc;
    border-radius: 10px;
    position: relative;
    transition: all 0.3s ease;
}

.toggle-slider-mini::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    top: 2px;
    left: 2px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.toggle-setting input:checked + .toggle-slider-mini {
    background: #2563eb;
}

.toggle-setting input:checked + .toggle-slider-mini::before {
    transform: translateX(20px);
}

.toggle-label-mini {
    font-weight: 500;
    color: #555;
    font-size: 14px;
}

/* Button Styles */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #2563eb, #1e40af);
    color: white;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

.btn-outline {
    background: transparent;
    color: #2563eb;
    border: 2px solid #2563eb;
}

.btn-outline:hover {
    background: #2563eb;
    color: white;
}

/* Keyboard Container */
.keyboard-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.keyboard-wrapper {
    display: flex;
    gap: 20px;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

.keyboard {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: linear-gradient(145deg, #f0f0f0, #cacaca);
    border-radius: 15px;
    box-shadow: 
        0 0 20px rgba(0, 0, 0, 0.1),
        inset 0 2px 4px rgba(255, 255, 255, 0.8),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.keyboard-row {
    display: flex;
    gap: 6px;
    justify-content: center;
    align-items: center;
}

.function-row {
    margin-bottom: 15px;
}

.key-group {
    display: flex;
    gap: 6px;
    margin: 0 10px;
}

/* Key Styles */
.key {
    min-width: 50px;
    height: 50px;
    background: linear-gradient(145deg, #ffffff, #e6e6e6);
    border: 1px solid #d0d0d0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
    text-align: center;
    line-height: 1.2;
    box-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.1),
        inset 0 1px 2px rgba(255, 255, 255, 0.8);
}

.key:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.key:active, .key.pressed {
    transform: translateY(1px);
    background: linear-gradient(145deg, #2563eb, #1e40af);
    color: white;
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.2),
        0 1px 2px rgba(0, 0, 0, 0.1);
}

.key.tested {
    background: linear-gradient(145deg, #4CAF50, #45a049);
    color: white;
    animation: testPulse 0.3s ease;
}

@keyframes testPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.key-sm {
    min-width: 45px;
    height: 45px;
    font-size: 10px;
}

.key-lg {
    min-width: 75px;
}

.key-xl {
    min-width: 90px;
}

.key-xxl {
    min-width: 120px;
}

.key-space {
    min-width: 300px;
}

.key-tall {
    height: 106px;
}

.key-wide {
    min-width: 106px;
}

/* Navigation Cluster */
.navigation-cluster {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}

.nav-block {
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: linear-gradient(145deg, #f0f0f0, #cacaca);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.nav-row {
    display: flex;
    gap: 6px;
}

.key-nav {
    min-width: 60px;
    height: 40px;
    font-size: 11px;
    background: linear-gradient(145deg, #ffffff, #e6e6e6);
    border: 1px solid #d0d0d0;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    color: #333;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Arrow Cluster */
.arrow-cluster {
    background: linear-gradient(145deg, #f0f0f0, #cacaca);
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.arrow-row {
    display: flex;
    gap: 6px;
    justify-content: center;
}

.key-arrow {
    min-width: 50px;
    height: 40px;
    font-size: 16px;
    font-weight: bold;
    background: linear-gradient(145deg, #ffffff, #e6e6e6);
    border: 1px solid #d0d0d0;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Numpad */
.numpad {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px;
    background: linear-gradient(145deg, #f0f0f0, #cacaca);
    border-radius: 15px;
    box-shadow: 
        0 0 20px rgba(0, 0, 0, 0.1),
        inset 0 2px 4px rgba(255, 255, 255, 0.8),
        inset 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.numpad-row {
    display: flex;
    gap: 6px;
}

.key-num {
    min-width: 50px;
    height: 50px;
    font-size: 14px;
    font-weight: 600;
    background: linear-gradient(145deg, #ffffff, #e6e6e6);
    border: 1px solid #d0d0d0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Bottom Panels Section */
.bottom-panels {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    margin: 30px 20px 0;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: grid;
    gap: 0;
    grid-template-columns: 2fr 1fr;
}

.bottom-stats, .bottom-keyinfo {
    padding: 25px;
}

.bottom-stats {
    border-right: 1px solid rgba(0, 0, 0, 0.1);
}

.panel-header {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid rgba(37, 99, 235, 0.1);
}

.panel-header h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-header i {
    color: #2563eb;
    font-size: 1.2rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    background: rgba(37, 99, 235, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.stat-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
}

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: #333;
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
    margin-top: 2px;
}

/* Progress Section */
.progress-section {
    display: grid;
    gap: 15px;
}

.progress-item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.progress-label {
    min-width: 80px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #555;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    border-radius: 4px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    min-width: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    color: #2563eb;
    text-align: right;
}

/* Key Details Grid */
.key-details-grid {
    display: grid;
    gap: 15px;
}

.key-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: rgba(37, 99, 235, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.key-detail .label {
    font-weight: 600;
    color: #555;
    font-size: 0.9rem;
}

.key-detail .value {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-weight: 500;
    color: #2563eb;
    background: rgba(37, 99, 235, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85rem;
}

.footer {
    display: none;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .keyboard-wrapper {
        flex-direction: column;
        align-items: center;
    }
    
    .key-space {
        min-width: 250px;
    }
    
    .bottom-panels {
        grid-template-columns: 1fr;
    }
    
    .bottom-stats {
        border-right: none;
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .header h1 {
        font-size: 2.2rem;
    }

    .header p {
        font-size: 1rem;
    }

    .quick-settings {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }

    .keyboard {
        padding: 15px;
    }

    .key {
        min-width: 40px;
        height: 40px;
        font-size: 10px;
    }

    .key-space {
        min-width: 200px;
    }

    .navigation-cluster {
        order: -1;
    }

    .numpad {
        order: 1;
    }

    .language-selector {
        position: relative;
        top: auto;
        right: auto;
        margin-bottom: 20px;
    }

    .language-btn {
        width: 100%;
        justify-content: center;
    }

    .language-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-top: 10px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .bottom-panels {
        margin: 20px 15px 0;
    }
}

@media (max-width: 480px) {
    .header h1 {
        font-size: 1.8rem;
    }

    .key {
        min-width: 35px;
        height: 35px;
        font-size: 9px;
    }

    .key-space {
        min-width: 150px;
    }

    .keyboard-wrapper {
        gap: 15px;
    }

    .key-num {
        min-width: 40px;
        height: 40px;
        font-size: 12px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .bottom-panels {
        margin: 15px 10px 0;
    }

    .bottom-stats, .bottom-keyinfo {
        padding: 20px;
    }
}

/* Animations */
@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px rgba(37, 99, 235, 0.5); }
    50% { box-shadow: 0 0 20px rgba(37, 99, 235, 0.8), 0 0 30px rgba(37, 99, 235, 0.6); }
}

.key.highlight {
    animation: glow 1s ease-in-out infinite;
}

/* RTL Support */
body.rtl {
    direction: rtl;
}

body.rtl .language-selector {
    left: 20px;
    right: auto;
}

body.rtl .language-dropdown .dropdown-menu {
    left: 0;
    right: auto;
}

body.rtl .keyboard-row {
    flex-direction: row-reverse;
}

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

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}