/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* CodeNest brand colors */
    --brand-primary: #6366f1;
    --brand-secondary: #8b5cf6;
    --brand-accent: #ec4899;
    --brand-light: #818cf8;
    
    /* Neutral colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-card: #1a2a45;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --border-color: #334155;
    
    /* UI colors */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(99, 102, 241, 0.15);
    --shadow-lg: 0 20px 40px rgba(99, 102, 241, 0.2);
    --shadow-xl: 0 25px 50px rgba(99, 102, 241, 0.25);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a2a45 50%, #2d1b4e 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

/* Animated background overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* ===== LANGUAGE SWITCHER ===== */
.language-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 5px;
    z-index: 1000;
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 6px;
    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.lang-btn {
    padding: 10px 18px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 8px;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}

.lang-btn:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--brand-light);
}

.lang-btn.active {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

/* Tablet adjustment: nudge switcher inward while keeping desktop layout */
@media (min-width: 851px) and (max-width: 1000px) {
    .language-switcher {
        top: 15px;
        right: 15px;
    }
}

/* ===== CONTAINER ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
 
    position: relative;
    z-index: 1;
}

/* ===== PAGE HEADER ===== */
.qr-page-header {

    text-align: center;
    position: relative;
    z-index: 1;
    margin-top: 10em;
}

.section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-top: 3rem;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 50%, var(--brand-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -1px;
    margin: 0;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0;
}

/* ===== HEADER ===== */
.header {
    text-align: center;
}

/* QR Page Header Styling */
.qr-generator-page .header {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a2a45 50%, #2d1b4e 100%);
    border-bottom: 1px solid rgba(99, 102, 241, 0.2);
    backdrop-filter: blur(10px);
}

.qr-generator-page .header .logo {
    color: var(--text-primary);
}

.qr-generator-page .header .nav-link {
    color: var(--text-secondary);
}

.qr-generator-page .header .nav-link:hover {
    color: var(--brand-light);
}

.qr-generator-page .header .nav-link.active {
    color: var(--brand-primary);
}

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

.qr-generator-page .language-switch {
    color: var(--text-primary);
}

.qr-generator-page .language-switch .lang-btn {
    color: var(--text-secondary);
}

.qr-generator-page .language-switch .lang-btn.active {
    color: var(--brand-primary);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary), var(--brand-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===== MAIN CONTENT - LAYOUT ===== */
.qr-main-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
    align-items: start;
}

.qr-app-container {
    position: relative;
    z-index: 1;
}

/* Mobile Layout Order */
@media (max-width: 850px) {
    .qr-main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .qr-preview-panel {
        order: 1;
    }
    
    .qr-settings-panel {
        order: 2;
    }
}

/* ===== COLLAPSIBLE DESIGN PANEL (MOBILE) ===== */
.qr-design-toggle {
    display: none;
    width: 100%;
    padding: 16px 20px;
    background: rgba(99, 102, 241, 0.1);
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition);
    margin-bottom: 0;
}

.qr-design-toggle:hover {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.3);
}

.qr-design-toggle .toggle-icon {
    transition: transform 0.3s ease;
}

.qr-design-toggle[aria-expanded="true"] .toggle-icon {
    transform: rotate(180deg);
}

.qr-design-content {
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
}

@media (max-width: 850px) {
    .qr-design-toggle {
        display: flex;
    }
    
    .qr-design-collapsible h3 {
        display: none;
    }
    
    .qr-design-content {
        max-height: 0;
        opacity: 0;
        margin-top: 0;
    }
    
    .qr-design-content.expanded {
        max-height: 2000px;
        opacity: 1;
        margin-top: 20px;
    }
}

/* ===== CARD STYLES ===== */
.preview-card,
.settings-card {
    background: linear-gradient(135deg, rgba(26, 42, 69, 0.8), rgba(30, 41, 59, 0.8));
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(99, 102, 241, 0.15);
    height: fit-content;
    backdrop-filter: blur(10px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.qr-preview-card:hover,
.qr-settings-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-xl);
}

.qr-preview-card::before,
.qr-settings-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
    border-radius: 20px;
    pointer-events: none;
}

.qr-preview-card h3,
.qr-settings-card h3 {
    font-size: 1.3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
    font-weight: 700;
    position: relative;
    z-index: 1;
}

/* ===== QR TYPE TABS ===== */
.qr-types {
    margin-bottom: 30px;
}

.qr-types h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.8px;
}

.qr-type-tabs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.qr-type-tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 14px 10px;
    background: rgba(99, 102, 241, 0.05);
    border: 2px solid rgba(99, 102, 241, 0.15);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.qr-type-tab::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    opacity: 0;
    transition: var(--transition);
}

.qr-type-tab svg {
    opacity: 0.6;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.qr-type-tab:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.1);
    color: var(--brand-light);
    transform: translateY(-2px);
}

.qr-type-tab:hover svg {
    opacity: 1;
}

.qr-type-tab.active {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    border-color: var(--brand-secondary);
    color: white;
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

.qr-type-tab.active svg {
    opacity: 1;
}

/* ===== INPUT FORMS ===== */
.qr-input-forms-container {
    margin-bottom: 30px;
    border-top: 1px solid rgba(99, 102, 241, 0.1);
    padding-top: 25px;
}

.qr-input-form {
    display: none;
}

.qr-input-form.active {
    display: block;
}

.input-form {
    animation: fadeIn 0.3s ease;
}

.qr-input-form label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.qr-input-form input[type="text"],
.qr-input-form input[type="url"],
.qr-input-form input[type="email"],
.qr-input-form input[type="tel"],
.qr-input-form input[type="number"],
.qr-input-form input[type="password"],
.qr-input-form select,
.qr-input-form textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(15, 23, 42, 0.6);
    border: 2px solid rgba(99, 102, 241, 0.15);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    transition: var(--transition);
    margin-bottom: 12px;
}

.qr-input-form input:focus,
.qr-input-form select:focus,
.qr-input-form textarea:focus {
    outline: none;
    border-color: var(--brand-primary);
    background: rgba(15, 23, 42, 0.8);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.input-form select {
    cursor: pointer;
}

.qr-input-form label input[type="checkbox"] {
    margin-right: 10px;
    width: auto;
    cursor: pointer;
}

.checkbox-label {
    display: flex;
    align-items: center;
    font-size: 0.95rem;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0;
    text-transform: none;
    letter-spacing: normal;
}

.qr-input-form small {
    display: block;
    margin-top: 8px;
    color: var(--text-secondary);
    opacity: 0.7;
    font-size: 0.8rem;
}

/* ===== DESIGN SECTION ===== */
.qr-preset-section {
    margin-bottom: 28px;
}

.qr-preset-section label {
    display: block;
    margin-bottom: 14px;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.qr-preset-buttons {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
}

.qr-preset-btn {
    padding: 12px 8px;
    background: rgba(99, 102, 241, 0.05);
    border: 2px solid rgba(99, 102, 241, 0.15);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
}

.qr-preset-btn:hover {
    border-color: rgba(99, 102, 241, 0.4);
    background: rgba(99, 102, 241, 0.1);
    color: var(--brand-light);
    transform: translateY(-2px);
}

.qr-preset-btn.active {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    border-color: var(--brand-secondary);
    color: white;
    box-shadow: 0 8px 16px rgba(99, 102, 241, 0.3);
}

/* Disabled state for preset and other controls */
.qr-preset-btn:disabled,
.qr-type-tab:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
    background: rgba(99, 102, 241, 0.05);
    border-color: rgba(99, 102, 241, 0.1);
    color: var(--text-secondary);
}

.qr-preset-btn:disabled:hover,
.qr-type-tab:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* ===== COLOR SECTION ===== */
.qr-color-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 28px;
}

.color-picker-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(99, 102, 241, 0.05);
    border: 2px solid rgba(99, 102, 241, 0.15);
    border-radius: 10px;
    padding: 8px 12px;
    transition: var(--transition);
}

.color-input-wrapper:focus-within {
    border-color: var(--brand-primary);
    background: rgba(99, 102, 241, 0.1);
}

.color-input-wrapper input[type="color"] {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    flex-shrink: 0;
}

.color-input-wrapper span {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* ===== SIZE SECTION ===== */
.qr-size-section {
    margin-bottom: 28px;
}

.qr-size-section label {
    display: block;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}

.size-input-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

.size-input-wrapper input[type="range"] {
    flex: 1;
    height: 6px;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
    border-radius: 10px;
    outline: none;
    border: none;
    cursor: pointer;
}

.size-input-wrapper input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    border: 3px solid white;
}

.size-input-wrapper input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.5);
}

.size-input-wrapper input[type="range"]::-moz-range-thumb {
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.size-input-wrapper span {
    font-weight: 700;
    color: var(--brand-light);
    min-width: 70px;
    text-align: right;
    background: rgba(99, 102, 241, 0.1);
    padding: 8px 12px;
    border-radius: 8px;
}

/* ===== PREVIEW PANEL ===== */
.qr-preview-panel {
    position: sticky;
    top: 20px;
}

@media (max-width: 850px) {
    .qr-preview-panel {
        position: static;
        top: auto;
    }
}

.preview-content {
    overflow: hidden;
}

.qr-code-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 350px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 24px;
    box-shadow: 
        inset 0 2px 4px rgba(0, 0, 0, 0.05),
        0 10px 30px rgba(99, 102, 241, 0.1);
    transition: opacity 0.3s ease, transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.qr-code-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        linear-gradient(45deg, transparent 30%, rgba(99, 102, 241, 0.05) 50%, transparent 70%),
        linear-gradient(-45deg, transparent 30%, rgba(139, 92, 246, 0.05) 50%, transparent 70%);
    pointer-events: none;
}

.qr-code-container canvas {
    max-width: 100%;
    height: auto;
    display: block;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
}

.error-message {
    display: none;
    text-align: center;
    padding: 50px 40px;
    color: var(--text-secondary);
    font-size: 1rem;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.error-message svg {
    opacity: 0.4;
    width: 60px;
    height: 60px;
}

.error-message.show {
    display: flex;
}

/* ===== ACTION BUTTONS ===== */
.preview-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.qr-btn {
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.qr-btn-primary {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: white;
    border: none;
}

.qr-btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.qr-btn-secondary {
    background: rgba(99, 102, 241, 0.1);
    color: white;
    border: 2px solid rgba(99, 102, 241, 0.3);
}

.qr-btn-secondary:hover:not(:disabled) {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-2px);
}

/* Disabled button state */
.qr-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.qr-btn:disabled:hover {
    box-shadow: var(--shadow-md);
}

.qr-btn svg {
    width: 20px;
    height: 20px;
}

.preview-header {
    margin-bottom: 20px;
}

.preview-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Loading spinner animation */
@keyframes spin {
    to { transform: rotate(360deg); }
}

.spinner {
    animation: spin 1s linear infinite;
}

/* ===== RESET BUTTON ===== */
.qr-btn-block {
    width: 100%;
    padding: 14px 24px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
    background: rgba(99, 102, 241, 0.1);
    border: 2px solid rgba(99, 102, 241, 0.3);
    color: white;
}

.qr-btn-block:hover {
    background: rgba(99, 102, 241, 0.15);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-2px);
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(26, 42, 69, 0.9));
    color: var(--text-primary);
    padding: 18px 28px;
    border-radius: 14px;
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.3);
    display: flex;
    align-items: center;
    gap: 14px;
    z-index: 10000;
    transform: translateY(150%);
    transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border: 1px solid rgba(99, 102, 241, 0.2);
    backdrop-filter: blur(10px);
}

.toast.show {
    transform: translateY(0);
}

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.toast-message {
    font-weight: 500;
    font-size: 0.95rem;
}

.toast-success {
    border-color: var(--success);
}

.toast-success .toast-icon {
    color: var(--success);
}

.toast-error {
    border-color: var(--error);
}

.toast-error .toast-icon {
    color: var(--error);
}

.toast-warning {
    border-color: var(--warning);
}

.toast-warning .toast-icon {
    color: var(--warning);
}

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: 60px 20px 30px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-top: 1px solid rgba(99, 102, 241, 0.1);
    position: relative;
    z-index: 1;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preview-card,
.settings-card {
    animation: fadeIn 0.6s ease-out;
}

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

.qr-generator-section {
   
    animation: slideInUp 0.8s ease-out;
}

/* ===== ACCESSIBILITY ===== */
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 3px solid var(--brand-primary);
    outline-offset: 2px;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .qr-design-content {
        transition: none;
    }
    
    .sticky-actions {
        transition: none;
    }
}

/* Improve touch targets on mobile */
@media (max-width: 850px) {
    button,
    .qr-type-tab,
    .qr-preset-btn,
    input[type="checkbox"],
    input[type="radio"] {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Better tap feedback */
    button:active,
    .qr-type-tab:active,
    .qr-preset-btn:active {
        transform: scale(0.97);
    }
}

/* Screen reader only text */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

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

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

/* ===== RESPONSIVE - TABLET ===== */
@media (max-width: 850px) {
    .section-title {
        font-size: 2.5rem;
    }
    
    .main-content {
        gap: 20px;
    }
    
    .preset-buttons {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .gradient-buttons {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===== HIDE CTA BUTTON BELOW 1000PX ===== */
@media (max-width: 1000px) {
    .nav-actions .qr-btn-primary {
        display: none;
    }
}

/* ===== RESPONSIVE - MOBILE ===== */
@media (max-width: 850px) {
    .qr-generator-page {
        padding: 0;
    }
    
    .container {
        padding: 15px;
    }
    
    .qr-page-header {
        padding: 20px 15px 15px;
        margin-top: 80px;
    }
    
    .section-title {
        font-size: 2rem;
        line-height: 1.2;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .language-switcher {
        top: 15px;
        right: 15px;
    }
    
    /* Preview always on top on mobile */
    .qr-preview-panel {
        position: static;
        order: 1;
    }
    
    .qr-settings-panel {
        order: 2;
    }
    
    .preview-card,
    .settings-card {
        padding: 24px;
    }
    
    .qr-code-container {
        min-height: 280px;
        padding: 30px 20px;
    }
    
    /* QR Type Tabs - 2 columns on mobile */
    .qr-type-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .qr-type-tab {
        padding: 14px 10px;
        font-size: 0.8rem;
        min-height: 70px;
    }
    
    .qr-type-tab svg {
        width: 22px;
        height: 22px;
    }
    
    /* Color section - single column */
    .qr-color-section {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .color-picker-group {
        gap: 12px;
    }
    
    /* Show preview actions on mobile under the QR code */
    .preview-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    
    .preview-actions .qr-btn {
        width: 100%;
        padding: 14px 16px;
        font-size: 0.95rem;
        min-height: 48px;
    }
    
    .toast {
        bottom: 20px;
        right: 16px;
        left: 16px;
        max-width: none;
    }
    
    .qr-preset-buttons {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
    }
    
    .qr-preset-btn {
        padding: 12px 10px;
        font-size: 0.85rem;
        min-height: 48px;
    }
    
    .settings-card h3 {
        font-size: 1.2rem;
    }
    
    .preview-card h2 {
        font-size: 1.2rem;
    }
    
    /* Input fields - better touch targets */
    .qr-input-form input,
    .qr-input-form textarea,
    .qr-input-form select {
        padding: 14px 16px;
        font-size: 16px; /* Prevents zoom on iOS */
        min-height: 48px;
    }
    
    .qr-input-form textarea {
        min-height: 120px;
    }
}

@media (max-width: 480px) {
    body {
        background: linear-gradient(135deg, var(--bg-primary) 0%, #1a2a45 50%, #2d1b4e 100%);
    }
    
    .section-title {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .section-subtitle {
        font-size: 0.9rem;
    }
    
    .container {
        padding: 12px;
    }
    
    .qr-page-header {
        padding: 15px 12px 12px;
        margin-top: 70px;
    }
    
    .lang-btn {
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .language-switcher {
        top: 12px;
        right: 12px;
        gap: 4px;
    }
    
    .preview-card,
    .settings-card {
        padding: 20px;
    }
    
    .qr-code-container {
        min-height: 250px;
        padding: 20px 15px;
    }
    
    .qr-code {
        max-width: 100%;
        height: auto;
    }
    
    /* QR Type Tabs - maintain 2 columns but smaller */
    .qr-type-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .qr-type-tab {
        padding: 12px 8px;
        font-size: 0.75rem;
        gap: 6px;
        min-height: 64px;
    }
    
    .qr-type-tab svg {
        width: 18px;
        height: 18px;
    }
    
    /* Preset buttons - 2 columns for easier tap */
    .qr-preset-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }
    
    .qr-preset-btn {
        padding: 10px 8px;
        font-size: 0.8rem;
        min-height: 44px;
    }
    
    .color-picker-group {
        gap: 10px;
    }
    
    .color-input-wrapper {
        flex-direction: row;
        padding: 10px 14px;
    }
    
    .settings-card h3 {
        font-size: 1rem;
    }
    
    .preview-card h2 {
        font-size: 1rem;
    }
    
    input[type="color"] {
        width: 44px;
        height: 44px;
    }
    
    input[type="range"] {
        width: 100%;
    }
    
    .toast {
        bottom: 20px;
        right: 12px;
        left: 12px;
        max-width: none;
        font-size: 0.9rem;
        padding: 14px 18px;
    }
    
    /* Mobile header adjustments */
    .qr-generator-page .header .nav {
        padding: 0.75rem 0;
    }
    
    .qr-generator-page .header .brand {
        font-size: 1rem;
    }
    
    .qr-generator-page .header .nav-menu {
        gap: 0.5rem;
    }
    
    .qr-generator-page .header .btn-small {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .qr-generator-page .header .logo img {
        height: 48px;
    }
    
    /* Sticky action bar - full height buttons */
    .sticky-actions {
        padding: 10px 12px;
    }
    
    .sticky-actions .qr-btn {
        padding: 12px 14px;
        font-size: 0.9rem;
        min-height: 48px;
    }
    
    /* Design toggle button */
    .qr-design-toggle {
        padding: 14px 18px;
        font-size: 1rem;
    }
}

/* ===== EXTRA SMALL DEVICES ===== */
@media (max-width: 360px) {
    .section-title {
        font-size: 1.3rem;
        line-height: 1.3;
    }
    
    .section-subtitle {
        font-size: 0.85rem;
    }
    
    .container {
        padding: 12px;
    }
    
    .qr-page-header {
        padding: 15px 12px 12px;
        margin-top: 70px;
    }
    
    .preview-card,
    .settings-card {
        padding: 20px;
    }
    
    .qr-code-container {
        min-height: 250px;
        padding: 20px 15px;
    }
    
    /* Single column for very small screens */
    .qr-type-tabs {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .qr-type-tab {
        padding: 12px 8px;
        font-size: 0.75rem;
        min-height: 64px;
    }
    
    .qr-preset-buttons {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .qr-preset-btn {
        padding: 10px 8px;
        font-size: 0.75rem;
        min-height: 44px;
    }
    
    .settings-card h3 {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }
    
    .preview-card h2 {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }
    
    .qr-generator-page .header .brand {
        font-size: 0.9rem;
    }
    
    .qr-generator-page .header .logo img {
        height: 40px;
    }
    
    .qr-design-toggle {
        padding: 12px 16px;
        font-size: 0.95rem;
    }
}

/* Status Badge */
.qr-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    width: fit-content;
    margin-bottom: 16px;
}

.qr-status-badge.empty {
    background: rgba(139, 92, 246, 0.1);
    color: var(--brand-light);
}

.qr-status-badge.generating {
    background: rgba(99, 102, 241, 0.1);
    color: var(--brand-light);
    animation: pulse 2s infinite;
}

.qr-status-badge.ready {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
}

.qr-status-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    display: inline-block;
}

/* Helper Text */
.qr-input-helper-text {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 6px;
    margin-bottom: 12px;
}

.qr-input-error-hint {
    font-size: 0.8rem;
    color: #ef4444;
    margin-top: 6px;
    display: none;
}

input:invalid ~ .qr-input-error-hint {
    display: block;
}

/* Empty QR State */
.qr-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--text-secondary);
    text-align: center;
    padding: 20px;
    border-radius: 12px;
    background: rgba(139, 92, 246, 0.05);
}

.qr-empty-state svg {
    width: 80px;
    height: 80px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.qr-empty-state p {
    font-size: 0.95rem;
    margin: 0;
}

/* Sticky Action Bar (Mobile) - HIDDEN, using preview-actions instead */
.sticky-actions {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, rgba(26, 42, 69, 0.95), rgba(30, 41, 59, 0.95));
    border-top: 1px solid rgba(99, 102, 241, 0.3);
    padding: 12px 16px;
    display: none;
    gap: 12px;
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(99, 102, 241, 0.2);
    backdrop-filter: blur(10px);
}

/* Sticky actions disabled - using preview-actions under QR code instead */
@media (max-width: 850px) {
    .sticky-actions {
        display: none !important;
    }
    
    /* Remove padding since no sticky bar */
    body {
        padding-bottom: 0;
    }
}

.sticky-actions .qr-btn {
    flex: 1;
    padding: 14px 16px;
    font-size: 0.95rem;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.sticky-actions .qr-btn span {
    display: none;
}

@media (min-width: 480px) {
    .sticky-actions .qr-btn span {
        display: inline;
    }
}

/* Disable showing sticky actions on all screens */
@media (min-width: 850px) {
    .sticky-actions {
        display: none !important;
    }
    
    body {
        padding-bottom: 0;
    }
}