/* 
 * Premium Vanilla CSS Framework 
 * Inspired by modern financial & SaaS dashboards 
 */

:root {
    /* Color Palette */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;

    --secondary: #475569;
    --background: #f8fafc;
    --surface: #ffffff;

    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* Text Colors */
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-inverse: #ffffff;

    /* Borders & Shadows */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-hover);
}

/* Layout */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--background) 0%, var(--primary-light) 100%);
}

.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    width: 100%;
    overflow: hidden;
}

.card-auth {
    max-width: 440px;
}

.card-header {
    padding: 2rem 2rem 1rem;
    text-align: center;
}

.card-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.card-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.card-body {
    padding: 1.5rem 2rem 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-main);
    background-color: var(--surface);
    background-clip: padding-box;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control.is-invalid {
    border-color: var(--danger);
}

.invalid-feedback {
    display: block;
    margin-top: 0.375rem;
    font-size: 0.875rem;
    color: var(--danger);
}

.form-check {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.form-check-input {
    width: 1rem;
    height: 1rem;
    margin-top: 0;
    margin-right: 0.5rem;
    color: var(--primary);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    cursor: pointer;
}

.form-check-label {
    font-size: 0.875rem;
    color: var(--secondary);
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--text-inverse);
}

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

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

.btn-block {
    width: 100%;
}

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

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

.fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

/* Topbar Context */
.topbar {
    background-color: var(--surface);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.025em;
}

/* Utilities */
.mt-4 {
    margin-top: 1rem;
}

.text-center {
    text-align: center;
}

.text-sm {
    font-size: 0.875rem;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .topbar {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .form-group.flex-row {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    h1 {
        font-size: 1.5rem !important;
    }

    /* Stack flex-based rows automatically */
    .mobile-stack {
        flex-direction: column !important;
        align-items: stretch !important;
    }

    /* Ensure tables can be swiped horizontally without breaking layout */
    .table-responsive {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Padding adjustments for mobile containers */
    .container {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }

    /* Grids stacking */
    .grid-mobile-stack {
        grid-template-columns: 1fr !important;
    }
}
/* Receipts Grid Styles */
.receipts-header {
    display: grid;
    grid-template-columns: 2fr 1fr 3fr auto;
    gap: 1rem;
    align-items: end;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--secondary);
    margin-bottom: 0.5rem;
    padding: 0 0.5rem;
}

.receipt-row-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 3fr auto;
    gap: 1rem;
    align-items: center;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .receipts-header {
        display: none; /* Hide header on mobile */
    }

    .receipt-row-grid {
        grid-template-columns: 1fr;
        background: var(--surface);
        padding: 1rem;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
    }

    .receipt-row-grid button {
        width: 100%;
        border: 1px solid var(--danger);
        background: #fef2f2;
    }
}

/* Form Card and Payee Details */
.form-card {
    padding: 3rem;
}

.payee-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
    background: var(--surface);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.state-zip-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .form-card {
        padding: 1rem;
    }

    .payee-grid {
        grid-template-columns: 1fr;
    }

    .state-zip-grid {
        grid-template-columns: 1fr;
    }
}

/* Grid Utilities */
.span-2 {
    grid-column: span 2;
}

@media (max-width: 768px) {
    .span-2 {
        grid-column: span 1;
    }
}