/* QR Code Generator - Modern UI Design */

/* === MODERN VARIABLES === */
:root {
    --modern-radius: 20px;
    --modern-radius-sm: 12px;
    --modern-radius-lg: 24px;
    --modern-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    --modern-shadow-hover: 0 30px 60px rgba(0, 0, 0, 0.15);
    --modern-gradient: linear-gradient(135deg, var(--accent-color-1), var(--accent-color-2));
    --modern-glass: rgba(255, 255, 255, 0.1);
    --modern-glass-border: rgba(255, 255, 255, 0.2);
    --modern-backdrop: backdrop-filter: blur(20px);
    --modern-transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === MODERN HEADER === */
.modern-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 13, 20, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--modern-glass-border);
    transition: var(--modern-transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo-section {
    display: flex;
    align-items: center;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--modern-transition);
}

.logo-link:hover {
    transform: translateY(-2px);
}

.logo-icon {
    width: 50px;
    height: 50px;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: rgb(16, 224, 183);
    box-shadow: 0 10px 20px rgba(0, 240, 255, 0.3);
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--modern-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.modern-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: var(--modern-radius);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--modern-transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.modern-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.6s;
}

.modern-btn:hover::before {
    left: 100%;
}

.modern-btn:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--accent-color-1);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 240, 255, 0.2);
}

.divider {
    width: 1px;
    height: 30px;
    background: var(--modern-glass-border);
}

.modern-toggle {
    position: relative;
    width: 60px;
    height: 32px;
    cursor: pointer;
}

.toggle-track {
    width: 100%;
    height: 100%;
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: 20px;
    position: relative;
    transition: var(--modern-transition);
}

.toggle-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 26px;
    height: 26px;
    background: var(--modern-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--modern-transition);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.toggle-thumb i {
    font-size: 0.8rem;
    color: rgb(84, 7, 7);
    position: absolute;
    transition: var(--modern-transition);
}

.toggle-thumb .fa-moon {
    opacity: 1;
}

.toggle-thumb .fa-sun {
    opacity: 0;
}

body.light-theme .toggle-thumb {
    transform: translateX(28px);
}

body.light-theme .toggle-thumb .fa-moon {
    opacity: 0;
}

body.light-theme .toggle-thumb .fa-sun {
    opacity: 1;
}

/* === MAIN LAYOUT === */
.qr-generator-main {
    min-height: 100vh;
    padding: 140px 0 80px 0;
    position: relative;
    background: 
        radial-gradient(circle at 20% 20%, rgba(0, 240, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(225, 0, 255, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(80, 97, 255, 0.02) 0%, transparent 50%);
}

.tool-header {
    text-align: center;
    margin-bottom: 80px;
    position: relative;
}

.tool-header::before {
    content: '';
    position: absolute;
    top: -50px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--modern-gradient);
    border-radius: 2px;
}

.tool-header h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    background: var(--modern-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    font-weight: 900;
}

.tool-description {
    font-size: 1.4rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* === GENERATOR CONTAINER === */
.qr-generator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1400px;
    margin: 0 auto;
}

/* === INPUT SECTION === */
.input-section {
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: var(--modern-radius-lg);
    padding: 40px;
    backdrop-filter: blur(20px);
    position: relative;
    box-shadow: var(--modern-shadow);
    transition: var(--modern-transition);
}

.input-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius-lg) var(--modern-radius-lg) 0 0;
}

.input-section:hover {
    transform: translateY(-5px);
    box-shadow: var(--modern-shadow-hover);
}

.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.glass-input {
    width: 100%;
    padding: 15px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
    transition: all var(--transition-fast);
    backdrop-filter: blur(5px);
}

.glass-input:focus {
    outline: none;
    border-color: var(--accent-color-1);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
    background: rgba(255, 255, 255, 0.08);
}

.glass-input::placeholder {
    color: var(--text-secondary);
}

textarea.glass-input {
    resize: vertical;
    min-height: 120px;
}

/* === DYNAMIC INPUTS === */
.dynamic-inputs .input-group {
    opacity: 1;
    max-height: 500px;
    transition: all var(--transition-medium);
}

.dynamic-inputs .input-group.hidden {
    opacity: 0;
    max-height: 0;
    margin: 0;
    overflow: hidden;
}

.field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.field-col {
    display: flex;
    flex-direction: column;
}

/* === CUSTOMIZATION SECTION === */
.customization-section {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.customization-section h3 {
    color: var(--accent-color-1);
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.color-input {
    width: 100%;
    height: 50px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.color-input:hover {
    border-color: var(--accent-color-1);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

/* === CHECKBOX STYLING === */
.checkbox-group {
    grid-column: 1 / -1;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--modern-radius-sm);
    padding: 16px;
    margin: 8px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    transition: var(--modern-transition);
}

.checkbox-label:hover {
    color: var(--accent-color-1);
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 22px;
    height: 22px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 6px;
    margin-right: 14px;
    position: relative;
    transition: all var(--transition-fast);
    background: rgba(255, 255, 255, 0.1);
}

.checkmark:hover {
    border-color: var(--accent-color-1);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background: var(--accent-color-1);
    border-color: var(--accent-color-1);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
    font-size: 14px;
}

/* === MODERN GENERATE BUTTON === */
.modern-generate-btn {
    width: 100%;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--modern-radius);
    cursor: pointer;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
    height: 60px;
    transition: var(--modern-transition);
}

.modern-generate-btn .btn-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    height: 100%;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius);
    color: rgb(50, 112, 199);
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 1.2rem;
    transition: var(--modern-transition);
}

.modern-generate-btn .btn-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius);
    filter: blur(10px);
    opacity: 0;
    transition: var(--modern-transition);
}

.modern-generate-btn:hover .btn-glow {
    opacity: 0.7;
    transform: scale(1.1);
}

.modern-generate-btn:hover {
    transform: translateY(-3px);
}

.modern-generate-btn:hover .btn-content {
    box-shadow: 0 20px 40px rgba(0, 240, 255, 0.3);
}

.modern-generate-btn:active {
    transform: translateY(-1px);
}

.modern-generate-btn.loading {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.modern-generate-btn.loading .btn-content i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* === OUTPUT SECTION === */
.modern-output {
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: var(--modern-radius-lg);
    padding: 40px;
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 600px;
    position: relative;
    box-shadow: var(--modern-shadow);
    transition: var(--modern-transition);
}

.modern-output::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-color-2), var(--accent-color-3));
    border-radius: var(--modern-radius-lg) var(--modern-radius-lg) 0 0;
}

.modern-output:hover {
    transform: translateY(-5px);
    box-shadow: var(--modern-shadow-hover);
}

/* === QR DISPLAY === */
.qr-display {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.modern-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    text-align: center;
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.placeholder-icon {
    width: 100px;
    height: 100px;
    background: var(--modern-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgb(27, 173, 189);
    margin-bottom: 10px;
    animation: pulse-icon 2s infinite;
}

@keyframes pulse-icon {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(0, 240, 255, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 20px rgba(0, 240, 255, 0);
    }
}

.placeholder-content h3 {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin: 0;
    font-weight: 700;
}

.placeholder-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.placeholder-decoration {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}

.decoration-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-color-1);
    border-radius: 50%;
    animation: dot-pulse 1.5s infinite;
}

.decoration-dot:nth-child(2) {
    animation-delay: 0.3s;
}

.decoration-dot:nth-child(3) {
    animation-delay: 0.6s;
}

@keyframes dot-pulse {
    0%, 100% {
        opacity: 0.3;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.2);
    }
}

.modern-qr-canvas {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 30px;
    background: var(--canvas-bg, rgb(22, 175, 213));
    border-radius: var(--modern-radius);
    margin: 30px 0;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(255, 255, 255, 0.1);
    position: relative;
    overflow: hidden;
    transition: var(--modern-transition);
}

.modern-qr-canvas.transparent-bg {
    background: transparent;
    border: 2px dashed rgba(0, 240, 255, 0.6);
    box-shadow: 
        0 0 20px rgba(0, 240, 255, 0.3),
        inset 0 0 20px rgba(255, 255, 255, 0.1);
}

.modern-qr-canvas::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius);
    z-index: -1;
}

.modern-qr-canvas canvas,
.modern-qr-canvas svg {
    border-radius: var(--modern-radius-sm);
    transition: var(--modern-transition);
}

.modern-qr-canvas:hover canvas,
.modern-qr-canvas:hover svg {
    transform: scale(1.02);
}

/* === DOWNLOAD SECTION === */
.modern-download {
    width: 100%;
    text-align: center;
    opacity: 1;
    transition: var(--modern-transition);
}

.modern-download.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(30px);
}

.download-header {
    text-align: center;
    margin-bottom: 30px;
}

.download-header h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.download-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.download-grid {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin: 30px 0;
}

.download-category {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--modern-radius);
    padding: 25px;
    backdrop-filter: blur(10px);
}

.download-category h4 {
    color: var(--accent-color-1);
    margin: 0 0 20px 0;
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-category h4::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--modern-gradient);
    border-radius: 2px;
}

.download-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
}

.modern-download-btn {
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--modern-radius-sm);
    cursor: pointer;
    transition: var(--modern-transition);
    position: relative;
    overflow: hidden;
    height: 80px;
    min-width: 160px;
}

.modern-download-btn .btn-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 15px;
    width: 100%;
    height: 100%;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius-sm);
    color: white;
    font-family: 'Orbitron', sans-serif;
    font-weight: 600;
    transition: var(--modern-transition);
    padding: 0 20px;
}

.modern-download-btn.secondary .btn-content {
    background: linear-gradient(135deg, var(--accent-color-2), var(--accent-color-3));
}

.modern-download-btn.tertiary .btn-content {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
}

.btn-content i {
    font-size: 1.5rem;
    min-width: 24px;
    flex-shrink: 0;
}

.btn-text-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
    flex: 1;
}

.btn-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0;
}

.btn-subtitle {
    font-weight: 400;
    font-size: 0.8rem;
    opacity: 0.9;
    margin: 2px 0 0 0;
    color: rgba(255, 255, 255, 0.8);
}

.modern-download-btn:hover {
    transform: translateY(-3px);
}

.modern-download-btn:hover .btn-content {
    box-shadow: 0 15px 35px rgba(0, 240, 255, 0.4);
}

.modern-download-btn.secondary:hover .btn-content {
    box-shadow: 0 15px 35px rgba(225, 0, 255, 0.4);
}

.modern-download-btn.tertiary:hover .btn-content {
    box-shadow: 0 15px 35px rgba(255, 107, 107, 0.4);
}

.modern-download-btn:active {
    transform: translateY(-1px);
}

.modern-download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.modern-download-btn:disabled .btn-content {
    box-shadow: none !important;
}

/* === QUALITY SETTINGS === */
.quality-settings {
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: var(--modern-radius);
    padding: 25px;
    margin: 20px 0;
    backdrop-filter: blur(10px);
}

.quality-settings h4 {
    color: var(--accent-color-1);
    margin: 0 0 20px 0;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.quality-settings h4::before {
    content: '⚙️';
    font-size: 1.2rem;
}

.quality-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.quality-group label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* === MODAL STYLES === */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: var(--modern-transition);
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: var(--modern-radius-lg);
    padding: 0;
    max-width: 700px;
    max-height: 80vh;
    width: 90%;
    backdrop-filter: blur(20px);
    box-shadow: var(--modern-shadow);
    overflow: hidden;
    transform: scale(0.9);
    transition: var(--modern-transition);
}

.modal:not(.hidden) .modal-content {
    transform: scale(1);
}

.modal-header {
    background: linear-gradient(135deg, var(--accent-color-1), var(--accent-color-2));
    padding: 25px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgb(19, 134, 187);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--modern-transition);
    color: rgb(72, 104, 221);
    font-size: 1.2rem;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.modal-body {
    padding: 30px;
    max-height: 60vh;
    overflow-y: auto;
}

.guide-section {
    margin-bottom: 30px;
}

.guide-section:last-child {
    margin-bottom: 0;
}

.guide-section h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.guide-section h3 i {
    color: var(--accent-color-1);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.guide-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--modern-radius-sm);
    padding: 12px 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--modern-transition);
}

.guide-item:hover {
    background: rgba(0, 240, 255, 0.05);
    border-color: rgba(0, 240, 255, 0.2);
}

.guide-item strong {
    color: var(--accent-color-1);
    font-weight: 600;
}

.guide-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--modern-radius-sm);
    color: var(--text-secondary);
}

kbd {
    background: var(--modern-gradient);
    color: rgb(16, 166, 199);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 968px) {
    .qr-generator-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .tool-header h1 {
        font-size: 2.8rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .field-row {
        grid-template-columns: 1fr;
    }
    
    .nav-controls {
        gap: 10px;
    }
    
    .btn-text,
    .btn-text-content {
        display: none;
    }
    
    .nav-home-btn,
    .nav-info-btn {
        padding: 12px;
        gap: 0;
    }
    
    .download-actions {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .quality-options {
        grid-template-columns: 1fr;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .qr-generator-main {
        padding: 100px 0 40px 0;
    }
    
    .tool-header h1 {
        font-size: 2.4rem;
    }
    
    .tool-description {
        font-size: 1rem;
        padding: 0 20px;
    }
    
    .input-section,
    .output-section {
        padding: 20px;
    }
    
    .qr-placeholder {
        padding: 40px 15px;
    }
    
    .qr-placeholder i {
        font-size: 3rem;
    }
    
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .download-grid {
        gap: 20px;
    }
    
    .download-category {
        padding: 20px;
    }
}

/* === ENHANCED DOWNLOAD SECTION === */
.download-grid {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin: 30px 0;
}

.download-category {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--modern-radius);
    padding: 25px;
    backdrop-filter: blur(10px);
}

.download-category h4 {
    color: var(--accent-color-1);
    margin: 0 0 20px 0;
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-category h4::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--modern-gradient);
    border-radius: 2px;
}

.download-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
}

.modern-download-btn {
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--modern-radius-sm);
    cursor: pointer;
    transition: var(--modern-transition);
    position: relative;
    overflow: hidden;
    height: 80px;
    min-width: 160px;
}

.modern-download-btn .btn-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 15px;
    width: 100%;
    height: 100%;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius-sm);
    color: rgb(10, 176, 191);
    font-family: 'Orbitron', sans-serif;
    font-weight: 600;
    transition: var(--modern-transition);
    padding: 0 20px;
}

.modern-download-btn.secondary .btn-content {
    background: linear-gradient(135deg, var(--accent-color-2), var(--accent-color-3));
}

.modern-download-btn.tertiary .btn-content {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
}

.btn-content i {
    font-size: 1.5rem;
    min-width: 24px;
    flex-shrink: 0;
}

.btn-text-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
    flex: 1;
}

.btn-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0;
}

.btn-subtitle {
    font-weight: 400;
    font-size: 0.8rem;
    opacity: 0.9;
    margin: 2px 0 0 0;
    color: rgba(255, 255, 255, 0.8);
}

.modern-download-btn:hover {
    transform: translateY(-3px);
}

.modern-download-btn:hover .btn-content {
    box-shadow: 0 15px 35px rgba(0, 240, 255, 0.4);
}

.modern-download-btn.secondary:hover .btn-content {
    box-shadow: 0 15px 35px rgba(225, 0, 255, 0.4);
}

.modern-download-btn.tertiary:hover .btn-content {
    box-shadow: 0 15px 35px rgba(255, 107, 107, 0.4);
}

.modern-download-btn:active {
    transform: translateY(-1px);
}

.modern-download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.modern-download-btn:disabled .btn-content {
    box-shadow: none !important;
}

/* === QUALITY SETTINGS === */
.quality-settings {
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: var(--modern-radius);
    padding: 25px;
    margin: 20px 0;
    backdrop-filter: blur(10px);
}

.quality-settings h4 {
    color: var(--accent-color-1);
    margin: 0 0 20px 0;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.quality-settings h4::before {
    content: '⚙️';
    font-size: 1.2rem;
}

.quality-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.quality-group label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* === NOTIFICATION SYSTEM === */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 12px;
    color: rgb(16, 171, 132);
    font-family: 'Orbitron', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    z-index: 10001;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    backdrop-filter: blur(10px);
    border: 1px solid;
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.notification.show {
    transform: translateX(0);
}

.notification.notification-success {
    background: rgba(46, 213, 115, 0.9);
    border-color: #4ee674;
}

.notification.notification-error {
    background: rgba(255, 71, 87, 0.9);
    border-color: #ff6b7a;
}

.notification.notification-info {
    background: rgba(29, 180, 191, 0.9);
    border-color: var(--accent-color-1);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.notification-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: rgb(85, 140, 217);
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.notification-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

/* === ANIMATIONS === */
@keyframes qr-appear {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.qr-canvas.generated {
    animation: qr-appear 0.5s ease-out;
}

/* === UTILITY CLASSES === */
.hidden {
    display: none !important;
}

.pulse-glow {
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
    }
    50% {
        box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
    }
}

/* === IMPROVED NAVIGATION === */
.nav-section {
    display: flex;
    align-items: center;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-home-btn,
.nav-info-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 20px;
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: var(--modern-radius);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--modern-transition);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    outline: none;
    border: none;
}

.btn-icon {
    width: 35px;
    height: 35px;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: rgb(18, 173, 163);
    transition: var(--modern-transition);
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.btn-label {
    font-weight: 700;
    font-size: 0.95rem;
}

.btn-sublabel {
    font-weight: 400;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 1px;
}

.nav-home-btn:hover,
.nav-info-btn:hover {
    background: rgba(0, 240, 255, 0.1);
    border-color: var(--accent-color-1);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 240, 255, 0.2);
}

.nav-home-btn:hover .btn-icon,
.nav-info-btn:hover .btn-icon {
    transform: scale(1.1);
    box-shadow: 0 5px 15px rgba(0, 240, 255, 0.4);
}

.nav-divider {
    width: 1px;
    height: 30px;
    background: var(--modern-glass-border);
    margin: 0 5px;
}

/* === RANGE INPUT STYLING === */
.range-input {
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--modern-gradient);
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 240, 255, 0.3);
    transition: var(--modern-transition);
}

.range-input::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
}

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--modern-gradient);
    cursor: pointer;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 240, 255, 0.3);
    transition: var(--modern-transition);
}

.range-value {
    display: inline-block;
    margin-left: 10px;
    color: var(--accent-color-1);
    font-weight: 600;
    font-size: 0.9rem;
    min-width: 50px;
}

/* === DOWNLOAD SECTION ENHANCEMENTS === */
.download-header {
    text-align: center;
    margin-bottom: 30px;
}

.download-header h3 {
    color: var(--text-primary);
    font-size: 1.5rem;
    margin-bottom: 8px;
    font-weight: 700;
}

.download-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.download-grid {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin: 30px 0;
}

.download-category {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--modern-radius);
    padding: 25px;
    backdrop-filter: blur(10px);
}

.download-category h4 {
    color: var(--accent-color-1);
    margin: 0 0 20px 0;
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-category h4::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--modern-gradient);
    border-radius: 2px;
}

.download-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
}

.modern-download-btn {
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--modern-radius-sm);
    cursor: pointer;
    transition: var(--modern-transition);
    position: relative;
    overflow: hidden;
    height: 80px;
    min-width: 160px;
}

.modern-download-btn .btn-content {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 15px;
    width: 100%;
    height: 100%;
    background: var(--modern-gradient);
    border-radius: var(--modern-radius-sm);
    color: rgb(39, 200, 154);
    font-family: 'Orbitron', sans-serif;
    font-weight: 600;
    transition: var(--modern-transition);
    padding: 0 20px;
}

.modern-download-btn.secondary .btn-content {
    background: linear-gradient(135deg, var(--accent-color-2), var(--accent-color-3));
}

.modern-download-btn.tertiary .btn-content {
    background: linear-gradient(135deg, #ff6b6b, #ffa500);
}

.btn-content i {
    font-size: 1.5rem;
    min-width: 24px;
    flex-shrink: 0;
}

.btn-text-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
    flex: 1;
}

.btn-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0;
}

.btn-subtitle {
    font-weight: 400;
    font-size: 0.8rem;
    opacity: 0.9;
    margin: 2px 0 0 0;
    color: rgba(255, 255, 255, 0.8);
}

.modern-download-btn:hover {
    transform: translateY(-3px);
}

.modern-download-btn:hover .btn-content {
    box-shadow: 0 15px 35px rgba(0, 240, 255, 0.4);
}

.modern-download-btn.secondary:hover .btn-content {
    box-shadow: 0 15px 35px rgba(225, 0, 255, 0.4);
}

.modern-download-btn.tertiary:hover .btn-content {
    box-shadow: 0 15px 35px rgba(255, 107, 107, 0.4);
}

.modern-download-btn:active {
    transform: translateY(-1px);
}

.modern-download-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.modern-download-btn:disabled .btn-content {
    box-shadow: none !important;
}

/* === QUALITY SETTINGS === */
.quality-settings {
    background: rgba(0, 240, 255, 0.05);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: var(--modern-radius);
    padding: 25px;
    margin: 20px 0;
    backdrop-filter: blur(10px);
}

.quality-settings h4 {
    color: var(--accent-color-1);
    margin: 0 0 20px 0;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.quality-settings h4::before {
    content: '⚙️';
    font-size: 1.2rem;
}

.quality-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.quality-group label {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

/* === MODAL STYLES === */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    visibility: visible;
    transition: var(--modern-transition);
}

.modal.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    background: var(--modern-glass);
    border: 1px solid var(--modern-glass-border);
    border-radius: var(--modern-radius-lg);
    padding: 0;
    max-width: 700px;
    max-height: 80vh;
    width: 90%;
    backdrop-filter: blur(20px);
    box-shadow: var(--modern-shadow);
    overflow: hidden;
    transform: scale(0.9);
    transition: var(--modern-transition);
}

.modal:not(.hidden) .modal-content {
    transform: scale(1);
}

.modal-header {
    background: linear-gradient(135deg, var(--accent-color-1), var(--accent-color-2));
    padding: 25px 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: rgb(19, 134, 187);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.modal-close {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--modern-transition);
    color: rgb(24, 202, 222);
    font-size: 1.2rem;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.modal-body {
    padding: 30px;
    max-height: 60vh;
    overflow-y: auto;
}

.guide-section {
    margin-bottom: 30px;
}

.guide-section:last-child {
    margin-bottom: 0;
}

.guide-section h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.guide-section h3 i {
    color: var(--accent-color-1);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.guide-item {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--modern-radius-sm);
    padding: 12px 15px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--modern-transition);
}

.guide-item:hover {
    background: rgba(0, 240, 255, 0.05);
    border-color: rgba(0, 240, 255, 0.2);
}

.guide-item strong {
    color: var(--accent-color-1);
    font-weight: 600;
}

.guide-shortcuts {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--modern-radius-sm);
    color: var(--text-secondary);
}

kbd {
    background: var(--modern-gradient);
    color: rgb(16, 166, 199);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Orbitron', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* === RESPONSIVE ENHANCEMENTS === */
@media (max-width: 968px) {
    .nav-controls {
        gap: 10px;
    }
    
    .btn-text,
    .btn-text-content {
        font-size: 0.75rem;
    }
    
    .btn-title {
        font-size: 0.9rem !important;
    }
    
    .btn-subtitle {
        font-size: 0.65rem !important;
    }
    
    .nav-home-btn,
    .nav-info-btn {
        padding: 12px;
        gap: 0;
    }
    
    .download-actions {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
    
    .quality-options {
        grid-template-columns: 1fr;
    }
    
    .guide-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal-header {
        padding: 20px;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    .download-grid {
        gap: 20px;
    }
    
    .download-category {
        padding: 20px;
    }
}

/* === LOADING STATES === */
.btn-loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-loading .btn-content::after {
    content: '';
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid rgb(16, 97, 132);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
}

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