:root {
    /* Color Palette - Blue & Gray based on user request */
    --primary-color: #0056b3;
    /* Strong Blue */
    --primary-hover: #004494;
    --secondary-color: #6c757d;
    /* Gray */
    --background-color: #f4f7f6;
    /* Light Grayish Blue background */
    --card-bg: #ffffff;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #e0e0e0;
    --error-color: #dc3545;
    --success-color: #28a745;

    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;

    /* Border Radius */
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-main);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

/* Layout Containers */
.main-container {
    width: 100%;
    max-width: 600px;
    padding: var(--spacing-md);
    margin: auto;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg) var(--spacing-lg);
    width: 100%;
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

/* Header & Logo */
.logo-container {
    margin-bottom: var(--spacing-lg);
}

.logo-container img {
    max-width: 250px;
    height: auto;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-main);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
}

.form-control:read-only {
    background-color: #f8f9fa;
    color: var(--text-muted);
    border-color: #eee;
}

/* Buttons */
.btn {
    display: inline-block;
    font-weight: 600;
    text-align: center;
    vertical-align: middle;
    user-select: none;
    padding: 12px 24px;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    cursor: pointer;
    width: 100%;
    border: none;
    text-decoration: none;
}

.btn-primary {
    color: #fff;
    background-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    color: var(--text-main);
    background-color: #e2e6ea;
    margin-top: var(--spacing-md);
}

.btn-secondary:hover {
    background-color: #dbe0e5;
}

/* Footer / Info */
.info-section {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.payment-methods img {
    max-width: 75%;
    height: auto;
    margin-top: var(--spacing-sm);
}

/* Utilities */
.text-center {
    text-align: center;
}

.mb-3 {
    margin-bottom: 1rem;
}

.mt-3 {
    margin-top: 1rem;
}

.text-danger {
    color: var(--error-color);
}

.text-success {
    color: var(--success-color);
}

.font-weight-bold {
    font-weight: 700;
}


/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

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

.hidden {
    display: none !important;
}

/* Loader */
.loader-container {
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Ticket / Invoice Style */
.ticket-view {
    text-align: left;
    background: #fff;
    border: 1px dashed var(--border-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.ticket-view::before,
.ticket-view::after {
    content: '';
    position: absolute;
    bottom: -10px;
    width: 100%;
    height: 10px;
    /* Zig-zag border effect could go here, keeping it simple for now */
}

.ticket-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #f0f0f0;
}

.ticket-row:last-child {
    border-bottom: none;
}

.ticket-label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.ticket-value {
    font-weight: 600;
    color: var(--text-main);
    text-align: right;
}

.ticket-total {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--text-main);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ticket-total .ticket-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-main);
}

.ticket-total .ticket-value {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

/* Shake Animation */
@keyframes shake {

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

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-5px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.5s;
    border-color: var(--error-color) !important;
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.25) !important;
}

.input-error {
    border-color: var(--error-color) !important;
}

/* Typography Helpers */
.text-large {
    font-size: 1.2rem !important;
    font-weight: 700 !important;
}

.warning-text {
    color: #c00;
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: var(--spacing-sm);
    text-align: center;
    display: block;
}