:root {
    --primary-color: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #06b6d4;
    --dark-color: #1e293b;
    --light-color: #f8fafc;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(to bottom, #ffffff 0%, #f8fafc 100%);
    min-height: 100vh;
    color: var(--dark-color);
    line-height: 1.6;
}

.landing-page {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    min-height: 100vh;
    color: white;
}

.hero-section {
    padding-top: 100px;
    padding-bottom: 50px;
}

.navbar {
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.navbar-dark {
    background: rgba(30, 41, 59, 0.95) !important;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.card {
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    background: white;
    box-shadow: var(--shadow);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border: none;
    padding: 1.5rem;
    font-weight: 600;
}

/* Card body บน QR Code - ตัวหนังสือต้องเป็นสีดำ */
.card-body {
    background: white;
}

.card-body .text-primary {
    color: #10b981 !important; /* เขียวเข้มแทนฟ้า */
}

.card-body code {
    background: #f1f5f9 !important;
    color: #1e293b !important;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
}

.card-body small {
    font-weight: 600;
}

.btn {
    border-radius: 10px;
    padding: 12px 24px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    letter-spacing: 0.3px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.btn-info {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.login-page {
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.stats-card {
    background: white;
    color: var(--dark-color);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.stats-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stats-card i {
    font-size: 2.5rem;
    opacity: 0.2;
    color: var(--primary-color);
}

.stats-card h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 10px 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stats-card small {
    color: var(--secondary-color);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.75rem;
}

.table-responsive {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.table {
    margin-bottom: 0;
}

.table thead {
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
}

.table-hover tbody tr:hover {
    background-color: #f8fafc;
    transition: all 0.2s ease;
}

.badge {
    padding: 6px 12px;
    border-radius: 8px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.form-control, .form-select {
    border-radius: 10px;
    border: 2px solid var(--border-color);
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    transform: translateY(-1px);
}

.input-group-text {
    border-radius: 10px 0 0 10px;
    border: 2px solid var(--border-color);
    border-right: none;
    background: var(--light-color);
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 10px 10px 0;
}

#qrcode {
    margin: 20px auto;
    padding: 20px;
    background: white;
    border-radius: 15px;
    display: inline-block;
}

/* QR Code Container - ตัวหนังสือต้องเป็นสีดำบนพื้นขาว */
.qr-container {
    background: white !important;
    color: #1e293b !important; /* สีดำ */
}

.qr-container h3,
.qr-container h4,
.qr-container h5,
.qr-container p,
.qr-container small,
.qr-container .text-muted {
    color: #1e293b !important; /* สีดำเข้ม */
}

.qr-container .amount-display {
    color: #10b981 !important; /* เขียวสำหรับราคา แต่เข้มกว่าเดิม */
    background: none !important;
    -webkit-text-fill-color: #10b981 !important;
}

.qr-container .badge {
    background: #e0e7ff !important;
    color: #4f46e5 !important;
}

.qr-container strong {
    color: #0f172a !important; /* สีดำมากสำหรับ strong text */
}

.shop-card {
    background: white;
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.alert {
    border-radius: 12px;
    border: none;
    padding: 16px 20px;
    box-shadow: var(--shadow-sm);
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
}

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
}

.alert-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
}

.profile-header {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    padding: 30px;
    border-radius: 16px 16px 0 0;
}

.profile-body {
    background: white;
    padding: 30px;
    border-radius: 0 0 16px 16px;
}

.transaction-item {
    border-left: 4px solid var(--primary-color);
    padding: 16px;
    margin-bottom: 12px;
    background: linear-gradient(to right, #f8fafc 0%, #ffffff 100%);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.transaction-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}

.points-badge {
    font-size: 2rem;
    padding: 20px 40px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: 20px;
    display: inline-block;
    margin: 10px 0;
    box-shadow: var(--shadow-lg);
    font-weight: 700;
    letter-spacing: 1px;
    animation: pulse 2s ease-in-out infinite;
}

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

.premium-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 2px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
}

.qr-display-card {
    background: white;
    border-radius: 24px;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    text-align: center;
    border: 2px solid var(--border-color);
}

/* QR Display - ข้อความต้องเป็นสีดำบนพื้นขาว */
.qr-display-card,
.qr-display-card * {
    color: #1e293b !important; /* สีดำเข้ม */
}

.qr-display-card .amount-display,
.qr-display-card .amount-display * {
    color: #10b981 !important; /* เขียวเข้มสำหรับราคา */
}

.qr-display-card .text-muted {
    color: #64748b !important; /* เทาเข้ม */
}

.amount-display {
    font-size: 4rem;
    font-weight: 800;
    color: #10b981 !important; /* เขียวเข้ม แทนที่จะใช้ gradient */
    margin: 1rem 0;
}

@media (max-width: 768px) {
    .hero-section {
        padding-top: 80px;
    }
    
    .stats-card h3 {
        font-size: 1.8rem;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

/* Glassmorphism Effect */
.glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Premium Shadow Effects */
.shadow-premium {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08),
                0 5px 15px rgba(0, 0, 0, 0.05);
}

/* Smooth Transitions */
* {
    transition: background-color 0.2s ease,
                border-color 0.2s ease,
                color 0.2s ease;
}

/* Print Styles */
@media print {
    .no-print {
        display: none !important;
    }
}