:root {
    /* Color Palette - PSS Red Theme */
    --primary-gradient: linear-gradient(135deg, #E31E24 0%, #C41E3A 100%);
    --secondary-gradient: linear-gradient(135deg, #FF6B6B 0%, #E31E24 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --danger-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    --primary-color: #E31E24;
    --primary-dark: #C41E3A;
    --secondary-color: #FF6B6B;
    --success-color: #00f2fe;
    --danger-color: #f5576c;

    /* Neutral Colors */
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --text-primary: #ffffff;
    --text-secondary: #b8b8d1;
    --text-muted: #7c7c9a;

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: 'Kanit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(227, 30, 36, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(196, 30, 58, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 107, 107, 0.05) 0%, transparent 50%);
    z-index: -1;
    animation: backgroundPulse 15s ease-in-out infinite;
}

@keyframes backgroundPulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.8;
    }
}

.app-container {
    max-width: 600px;
    margin: 0 auto;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
.app-header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-md) var(--spacing-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.company-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {

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

    50% {
        transform: translateY(-5px);
    }
}

.logo-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.logo-section h1 {
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.scan-count {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

#scanCountBadge {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--success-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.scan-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-sm);
    padding-bottom: var(--spacing-xl);
}

/* Glass Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(31, 38, 135, 0.5);
}

/* Scanner Section */
.scanner-section {
    margin-bottom: var(--spacing-lg);
}

.scanner-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.scanner-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.scanner-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.scanner-container {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-tertiary);
    margin-bottom: var(--spacing-md);
    min-height: 300px;
}

#qr-reader {
    width: 100%;
    border-radius: var(--radius-md);
}

#qr-reader video {
    border-radius: var(--radius-md);
    object-fit: cover;
}

/* Scanner overlay - hidden to improve scanning */
.scanner-overlay {
    display: none;
}

/* Scanner Controls */
.scanner-controls {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    align-items: center;
}

/* Buttons */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-family: 'Kanit', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

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

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    flex: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    flex: 1;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-icon {
    background: var(--glass-bg);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm);
    width: 48px;
    height: 48px;
    justify-content: center;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: rotate(180deg);
}

.btn-text {
    background: transparent;
    color: var(--danger-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
}

.btn-text:hover {
    background: rgba(245, 87, 108, 0.1);
}

/* Scan Result */
.scan-result {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    text-align: center;
    animation: slideIn var(--transition-normal);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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

.result-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.5s ease;
}

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

    to {
        transform: scale(1);
    }
}

.result-icon.success {
    background: var(--success-gradient);
    box-shadow: 0 4px 20px rgba(0, 242, 254, 0.4);
}

.result-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.result-text {
    color: var(--text-primary);
    font-size: 1rem;
    word-break: break-all;
    line-height: 1.5;
}

/* History Section */
.history-section {
    margin-top: var(--spacing-lg);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.history-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.history-actions {
    display: flex;
    gap: var(--spacing-xs);
    align-items: center;
}

.btn-success {
    background: var(--success-gradient);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 242, 254, 0.5);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* History Item */
.history-item {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    animation: slideIn var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.history-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
}

.history-item:hover {
    transform: translateX(4px);
    border-color: rgba(102, 126, 234, 0.3);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.2);
}

.history-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xs);
}

.history-item-time {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.history-item-time svg {
    width: 14px;
    height: 14px;
}

.history-item-delete {
    background: transparent;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.history-item-delete:hover {
    background: rgba(245, 87, 108, 0.1);
    transform: scale(1.1);
}

.history-item-delete svg {
    width: 18px;
    height: 18px;
}

.history-item-content {
    color: var(--text-primary);
    font-size: 0.95rem;
    word-break: break-all;
    line-height: 1.5;
    padding: var(--spacing-xs);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

.pagination-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--primary-gradient);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(227, 30, 36, 0.3);
}

.pagination-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.pagination-btn svg {
    width: 16px;
    height: 16px;
}

.pagination-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1rem;
    font-weight: 600;
}

.page-current {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.page-separator {
    color: var(--text-muted);
}

.page-total {
    color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    color: var(--text-muted);
}

.empty-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--glass-bg);
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
}

.empty-icon svg {
    width: 40px;
    height: 40px;
    color: var(--text-muted);
}

.empty-state p {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.empty-subtitle {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: bottom var(--transition-normal);
    z-index: 1000;
    max-width: 90%;
    text-align: center;
}

.toast.show {
    bottom: var(--spacing-lg);
}

/* Responsive Design */
@media (max-width: 480px) {
    .app-header {
        padding: var(--spacing-sm);
    }

    .logo-section h1 {
        font-size: 1.25rem;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }

    .logo-icon svg {
        width: 20px;
        height: 20px;
    }

    .scan-frame {
        width: 200px;
        height: 200px;
    }

    .scanner-controls {
        flex-wrap: wrap;
    }

    .btn-primary,
    .btn-secondary {
        flex: 1 1 100%;
    }
}

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

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

/* Accessibility */
.btn:focus,
.history-item-delete:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print Styles */
@media print {

    .scanner-section,
    .app-header {
        display: none;
    }
}

/* Toast Notification */
#toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 10000;
    opacity: 0;
    transition: all var(--transition-normal);
    max-width: 90%;
    text-align: center;
}

#toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

#toast.toast-success {
    background: linear-gradient(135deg, rgba(227, 30, 36, 0.9) 0%, rgba(196, 30, 58, 0.9) 100%);
    border-color: var(--primary-color);
    box-shadow: 0 8px 32px rgba(227, 30, 36, 0.5);
}

#toast.toast-info {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.9) 0%, rgba(0, 242, 254, 0.9) 100%);
    border-color: var(--success-color);
    box-shadow: 0 8px 32px rgba(0, 242, 254, 0.5);
}

#toast.toast-error {
    background: linear-gradient(135deg, rgba(250, 112, 154, 0.9) 0%, rgba(254, 225, 64, 0.9) 100%);
    border-color: var(--danger-color);
    box-shadow: 0 8px 32px rgba(245, 87, 108, 0.5);
}