/* ========================================
   QR Code Generator - Premium Styles
   Edupidia - Production Ready
   ======================================== */

/* Design Tokens */
:root {
    --color-bg: #f8fafc;
    --color-bg-alt: #ffffff;
    --color-surface: rgba(255, 255, 255, 0.8);
    --color-surface-solid: #ffffff;
    --color-text: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-border: rgba(15, 23, 42, 0.08);
    --color-border-strong: rgba(15, 23, 42, 0.15);

    --color-primary: #6366f1;
    --color-primary-hover: #4f46e5;
    --color-primary-light: rgba(99, 102, 241, 0.1);
    --color-secondary: #ec4899;
    --color-accent: #8b5cf6;

    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;

    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 50%, rgba(236, 72, 153, 0.05) 100%);
    --gradient-bg: linear-gradient(135deg, #f5f3ff 0%, #fdf2f8 50%, #eff6ff 100%);
    --gradient-text: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.12);
    --shadow-xl: 0 16px 48px rgba(15, 23, 42, 0.16);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

    --container-max: 1400px;
}

[data-theme="dark"] {
    --color-bg: #0f172a;
    --color-bg-alt: #1e293b;
    --color-surface: rgba(30, 41, 59, 0.6);
    --color-surface-solid: #1e293b;
    --color-text: #f1f5f9;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #64748b;
    --color-border: rgba(241, 245, 249, 0.08);
    --color-border-strong: rgba(241, 245, 249, 0.15);

    --gradient-bg: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 50%, rgba(236, 72, 153, 0.1) 100%);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.6);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--gradient-bg);
    background-attachment: fixed;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
}

.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px 16px;
    text-decoration: none;
    z-index: 1000;
    border-radius: 0 0 var(--radius-md) 0;
}

.skip-to-main:focus {
    top: 0;
}

.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.icon {
    flex-shrink: 0;
    display: inline-block;
    vertical-align: middle;
}

/* Hero */
.hero {
    position: relative;
    padding: var(--space-12) 0 var(--space-8);
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: #6366f1;
    top: -100px;
    left: -100px;
}

.shape-2 {
    width: 500px;
    height: 500px;
    background: #ec4899;
    bottom: -200px;
    right: -100px;
    animation-delay: -5s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: #8b5cf6;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -30px) scale(1.05);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
    animation: fadeInDown 0.6s ease-out;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.6;
        transform: scale(1.2);
    }
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
    animation: fadeInUp 0.6s ease-out;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    z-index: 100;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(15deg);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.theme-icon {
    transition: transform var(--transition-base), opacity var(--transition-base);
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    position: absolute;
    transform: rotate(-90deg) scale(0);
}

[data-theme="light"] .sun-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    position: absolute;
    transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

/* Generator Section */
.generator-section {
    padding: var(--space-8) 0 var(--space-12);
    position: relative;
}

/* Type Tabs */
.type-tabs-wrapper {
    margin-bottom: var(--space-8);
}

.type-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
    scrollbar-width: thin;
    scroll-snap-type: x mandatory;
}

.type-tabs::-webkit-scrollbar {
    height: 6px;
}

.type-tabs::-webkit-scrollbar-track {
    background: var(--color-border);
    border-radius: 10px;
}

.type-tabs::-webkit-scrollbar-thumb {
    background: var(--color-text-tertiary);
    border-radius: 10px;
}

.type-tab {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-base);
    scroll-snap-align: start;
}

.type-tab:hover {
    background: var(--color-surface-solid);
    color: var(--color-text);
    border-color: var(--color-border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.type-tab.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.type-tab:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.type-tab-icon {
    font-size: 1.1rem;
}

/* Generator Grid */
.generator-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 1024px) {
    .generator-grid {
        grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
        gap: var(--space-8);
    }
}

/* Panel */
.panel {
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.5s ease-out;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.panel-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
}

.preview-actions {
    display: flex;
    gap: 6px;
}

.icon-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    background: var(--color-surface-solid);
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.icon-btn:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.icon-btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.icon-btn.active svg {
    fill: var(--color-secondary);
    color: var(--color-secondary);
}

[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 10px;
    background: var(--color-text);
    color: var(--color-bg);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    z-index: 100;
    pointer-events: none;
    animation: tooltipFade 0.2s ease-out;
}

@keyframes tooltipFade {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(4px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Form */
.qr-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-fields {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-field label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.form-field label .required {
    color: var(--color-error);
    margin-left: 2px;
}

.form-input,
.form-textarea,
.select-input {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--color-text);
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.select-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input.invalid,
.form-textarea.invalid {
    border-color: var(--color-error);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
    font-family: var(--font-mono);
}

.field-error {
    font-size: 0.8rem;
    color: var(--color-error);
    display: flex;
    align-items: center;
    gap: 4px;
    animation: shake 0.3s;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-4px);
    }

    75% {
        transform: translateX(4px);
    }
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

@media (max-width: 480px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-errors {
    padding: 12px 16px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-md);
    color: var(--color-error);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Customization Panel */
.customization-panel {
    margin-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-4);
}

.accordion-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    background: transparent;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    transition: color var(--transition-base);
}

.accordion-toggle:hover {
    color: var(--color-primary);
}

.accordion-label {
    display: flex;
    align-items: center;
    gap: 10px;
}

.accordion-chevron {
    transition: transform var(--transition-base);
}

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

.accordion-content {
    overflow: hidden;
    transition: max-height var(--transition-slow);
    max-height: 0;
}

.accordion-content[hidden] {
    display: block;
    max-height: 0;
}

.accordion-content:not([hidden]) {
    max-height: 2000px;
    padding-top: var(--space-4);
}

.customization-sections {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.custom-section h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.custom-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
}

@media (min-width: 640px) {
    .custom-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.custom-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.custom-field label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.custom-field label span {
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-weight: 600;
}

.range-input {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--color-border-strong);
    outline: none;
    cursor: pointer;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
    border: 3px solid var(--color-bg-alt);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-base);
}

.range-input::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.range-input::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--gradient-primary);
    cursor: pointer;
    border: 3px solid var(--color-bg-alt);
    box-shadow: var(--shadow-md);
}

.range-input:focus-visible::-webkit-slider-thumb {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    padding: 4px;
    transition: all var(--transition-base);
}

.color-input-wrapper:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.color-picker {
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
    background: transparent;
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker::-webkit-color-swatch {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.hex-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--color-text);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    outline: none;
    padding: 8px;
    text-transform: uppercase;
}

.error-correction-group {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.ec-option {
    cursor: pointer;
}

.ec-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.ec-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 8px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
    cursor: pointer;
    text-align: center;
}

.ec-option input[type="radio"]:checked+.ec-label {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-md);
}

.ec-option input[type="radio"]:focus-visible+.ec-label {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.ec-label:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.hint {
    font-size: 0.8rem;
    color: var(--color-text-tertiary);
    font-style: italic;
    margin-top: 8px;
}

.checkbox-field {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--color-text);
    padding: 8px 0;
    user-select: none;
}

.checkbox-field input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-base);
    position: relative;
}

.checkbox-field input[type="checkbox"]:checked+.checkmark {
    background: var(--gradient-primary);
    border-color: transparent;
}

.checkbox-field input[type="checkbox"]:checked+.checkmark::after {
    content: '';
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-1px, -1px);
}

.checkbox-field input[type="checkbox"]:focus-visible+.checkmark {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.logo-upload-area {
    position: relative;
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    overflow: hidden;
}

.logo-upload-area:hover,
.logo-upload-area.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.logo-upload-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.logo-upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: var(--space-8) var(--space-4);
    text-align: center;
    color: var(--color-text-secondary);
    pointer-events: none;
}

.logo-upload-content p {
    font-weight: 500;
}

.logo-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    position: relative;
}

.logo-preview img {
    max-width: 120px;
    max-height: 120px;
    object-fit: contain;
}

.logo-remove-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-solid);
    color: var(--color-text);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 10;
}

.logo-remove-btn:hover {
    background: var(--color-error);
    color: white;
    border-color: transparent;
}

.qr-preview-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    min-height: 320px;
    border: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
    overflow: hidden;
}

.qr-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.3s ease-out;
}

.qr-placeholder {
    text-align: center;
    color: var(--color-text-tertiary);
    padding: var(--space-8);
}

.qr-placeholder svg {
    margin-bottom: 16px;
    opacity: 0.5;
}

.qr-placeholder p {
    font-size: 0.95rem;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.qr-info {
    padding: 12px 16px;
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-family: var(--font-mono);
    word-break: break-all;
    margin-bottom: var(--space-4);
}

.qr-info:empty {
    display: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--color-surface-solid);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-solid);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn::after {
    content: '';
    position: absolute;
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    transform: scale(0);
    opacity: 0;
    pointer-events: none;
}

.btn:active::after {
    animation: ripple 0.6s;
}

@keyframes ripple {
    from {
        transform: scale(0);
        opacity: 1;
    }

    to {
        transform: scale(3);
        opacity: 0;
    }
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.action-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.primary-actions .btn {
    flex: 1;
    min-width: 120px;
}

.secondary-actions .btn {
    flex: 1;
    min-width: 100px;
}

@media (max-width: 480px) {
    .action-group .btn {
        flex: 1 1 calc(50% - 4px);
    }
}

.history-section {
    margin-top: var(--space-12);
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-lg);
}

.history-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

@media (min-width: 640px) {
    .history-header {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }
}

.history-header h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
}

.history-tabs {
    display: flex;
    gap: 4px;
    background: var(--color-bg-alt);
    padding: 4px;
    border-radius: var(--radius-md);
}

.history-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    font-family: inherit;
}

.history-tab.active {
    background: var(--color-surface-solid);
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
}

.history-tab:hover:not(.active) {
    color: var(--color-text);
}

.history-tab:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.history-panels {
    position: relative;
}

.history-panel {
    display: none;
}

.history-panel.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.history-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-4);
}

.history-item {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--transition-base);
    position: relative;
    cursor: pointer;
}

.history-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.history-item img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    background: white;
    padding: 8px;
}

.history-item-info {
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.history-item-type {
    display: inline-block;
    padding: 2px 8px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    align-self: flex-start;
}

.history-item-data {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-family: var(--font-mono);
}

.history-item-actions {
    display: flex;
    gap: 4px;
    margin-top: 8px;
}

.history-item-actions .icon-btn {
    width: 28px;
    height: 28px;
    padding: 0;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-12) var(--space-4);
    color: var(--color-text-tertiary);
    font-style: italic;
}

/* FAQ Section */
.faq-section {
    padding: var(--space-12) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.section-header h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: var(--space-3);
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--color-border-strong);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5);
    background: transparent;
    border: none;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    text-align: left;
    cursor: pointer;
    transition: color var(--transition-base);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-question:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 var(--space-5) var(--space-5);
}

.faq-item.active .faq-question svg {
    transform: rotate(45deg);
}

.faq-question svg {
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

/* Toast */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 280px;
    max-width: 400px;
    padding: 14px 18px;
    background: var(--color-surface-solid);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    font-size: 0.9rem;
    color: var(--color-text);
    pointer-events: auto;
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid var(--color-primary);
}

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

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

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

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

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

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

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

.toast.removing {
    animation: slideOutRight 0.3s ease-out forwards;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@media (prefers-contrast: high) {
    :root {
        --color-border: rgba(0, 0, 0, 0.5);
        --color-border-strong: rgba(0, 0, 0, 0.8);
    }

    .btn,
    .form-input,
    .form-textarea {
        border-width: 2px;
    }
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media print {

    .hero,
    .customization-panel,
    .action-buttons,
    .history-section,
    .faq-section,
    .theme-toggle,
    .type-tabs-wrapper {
        display: none !important;
    }

    body {
        background: white;
    }

    .panel {
        box-shadow: none;
        border: none;
        background: white;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 var(--space-4);
    }

    .panel {
        padding: var(--space-4);
        border-radius: var(--radius-xl);
    }

    .qr-preview-container {
        padding: var(--space-4);
        min-height: 240px;
    }

    .hero {
        padding: var(--space-8) 0 var(--space-6);
    }

    .theme-toggle {
        top: 12px;
        right: 12px;
        width: 42px;
        height: 42px;
    }

    .history-list {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
}