/* Payment Tracker — Monochrome Minimal */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    font-size: 0.9375rem;
    line-height: 1.5;
    color: #111;
    background: #fff;
    padding: 0;
    margin: 0;
}

/* Layout */
.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Navigation */
nav {
    background: #111;
    color: #fff;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

nav .nav-user {
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

nav .nav-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

nav a {
    color: #fff;
    text-decoration: none;
    font-size: 0.8125rem;
    padding: 0.25rem 0;
    border-bottom: 2px solid transparent;
    transition: border-color 0.15s;
}

nav a:hover {
    border-bottom-color: #fff;
}

nav .nav-logout {
    margin-left: auto;
}

/* Typography */
h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 0.75rem;
}

hr {
    border: none;
    border-top: 1px solid #e0e0e0;
    margin: 1.5rem 0;
}

/* Flash Messages */
.flash {
    padding: 0.625rem 1rem;
    margin-bottom: 1rem;
    font-size: 0.8125rem;
    border-left: 3px solid #111;
    background: #f5f5f5;
}

.flash-error {
    border-left-color: #d00;
    background: #fff5f5;
}

.flash-success {
    border-left-color: #111;
    background: #f5f5f5;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    font-size: 0.8125rem;
}

thead {
    border-bottom: 2px solid #111;
}

th {
    text-align: left;
    padding: 0.5rem 0.75rem;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: #555;
}

td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid #e8e8e8;
}

tbody tr:hover {
    background: #fafafa;
}

/* Summary Cards */
.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
    max-width: 100%;
}

.summary-card {
    border: 1px solid #e0e0e0;
    padding: 1rem;
    min-width: 0;
}

.summary-card .label {
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #666;
    margin-bottom: 0.25rem;
}

.summary-card .value {
    font-size: 1.5rem;
    font-weight: 700;
}

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

label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="file"],
select {
    width: 100%;
    max-width: 360px;
    padding: 0.5rem 0.625rem;
    font-size: 0.875rem;
    border: 1px solid #ccc;
    background: #fff;
    margin-bottom: 1rem;
    font-family: inherit;
}

input:focus,
select:focus {
    outline: none;
    border-color: #111;
}

/* Inline filter forms */
.filter-form {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.filter-form label {
    margin-bottom: 0;
}

.filter-form select,
.filter-form input[type="text"] {
    width: auto;
    min-width: 140px;
    margin-bottom: 0;
}

/* Buttons */
button,
.btn {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border: 1px solid #111;
    background: #111;
    color: #fff;
    cursor: pointer;
    text-decoration: none;
    font-family: inherit;
    transition: background 0.15s, color 0.15s;
}

button:hover,
.btn:hover {
    background: #fff;
    color: #111;
}

.btn-sm {
    padding: 0.3rem 0.75rem;
    font-size: 0.6875rem;
}

.btn-outline {
    background: #fff;
    color: #111;
}

.btn-outline:hover {
    background: #111;
    color: #fff;
}

.btn-outline.active,
.filter-btn.active {
    background: #111;
    color: #fff;
}

.btn-danger {
    border-color: #d00;
    background: #d00;
}

.btn-danger:hover {
    background: #fff;
    color: #d00;
}

/* Links */
a {
    color: #111;
    text-decoration: underline;
}

a:hover {
    text-decoration: none;
}

/* Status badges */
.badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: 0.2rem 0.5rem;
    border: 1px solid;
}

.badge-paid {
    color: #111;
    border-color: #111;
    background: #f0f0f0;
}

.badge-pending {
    color: #666;
    border-color: #ccc;
    background: #fafafa;
}

.badge-overdue {
    color: #d00;
    border-color: #d00;
    background: #fff5f5;
}

.badge-partial {
    color: #886600;
    border-color: #cc9900;
    background: #fffbf0;
}

.badge-matched {
    color: #111;
    border-color: #111;
    background: #f0f0f0;
}

.badge-unmatched {
    color: #d00;
    border-color: #d00;
    background: #fff5f5;
}

.badge-waived {
    color: #555;
    border-color: #999;
    background: #f5f5f5;
}

.badge-dismissed {
    color: #555;
    border-color: #999;
    background: #f5f5f5;
}

/* Login page */
.login-container {
    max-width: 320px;
    margin: 4rem auto;
    padding: 2rem;
}

.login-container h1 {
    margin-bottom: 2rem;
}

/* Utility */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-muted { color: #666; font-size: 0.8125rem; }
.text-right { text-align: right; }

tfoot td {
    border-top: 2px solid #111;
    padding: 0.5rem 0.75rem;
}

/* Status boxes */
.status-box {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.status-good {
    background: #e8f5e9;
    border: 1px solid #a5d6a7;
    color: #2e7d32;
}

.status-action {
    background: #e3f2fd;
    border: 1px solid #90caf9;
    color: #1565c0;
}

/* Responsive */
@media (max-width: 640px) {
    .container { padding: 1rem; }
    nav { padding: 0.5rem 1rem; gap: 0.75rem; }
    .summary-grid { grid-template-columns: 1fr; }
    table { font-size: 0.75rem; }
    th, td { padding: 0.4rem 0.5rem; }
}