/* ==============================================
   Invoice Reminder System - Design System
   Color Rule 60-30-10:
     60% → Light backgrounds (#f7f5f5, #fff)
     30% → Dark tones (#1e3453, #52756f)
     10% → Accent highlights (#66a79f, #6988b4)
   ============================================== */

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

:root {
    --trias-ash: #1e3453;
    --trias-teal: #66a79f;
    --gray: #e6e6e6;
    --light-gray: #f7f5f5;
    --teal: #52756f;
    --blue: #6988b4;
    --white-blue: #dbe5ea;
    --dark-gray: #b4b4b4;

    --bg-primary: #ffffff;
    --bg-secondary: var(--light-gray);
    --bg-sidebar: var(--trias-ash);
    --text-primary: #2d2d2d;
    --text-secondary: #666666;
    --text-inverse: #ffffff;
    --border: var(--gray);
    --shadow-sm: 0 1px 3px rgba(30, 52, 83, 0.08);
    --shadow-md: 0 4px 12px rgba(30, 52, 83, 0.1);
    --shadow-lg: 0 8px 24px rgba(30, 52, 83, 0.12);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --transition: all 0.25s ease;

    --success: #48a87c;
    --warning: #d4a03c;
    --danger: #c0504d;
    --info: var(--blue);
}

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--trias-teal);
    text-decoration: none;
    transition: var(--transition);
}

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

/* --- Sign in --- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    min-height: 100svh;
    padding: 40px 20px;
    background: radial-gradient(ellipse at 50% 0%, rgba(102,167,159,0.12), transparent 65%), var(--bg-secondary);
}

.login-shell {
    width: 100%;
    max-width: 460px;
}

.login-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 28px;
}

.login-logo-badge {
    display: grid;
    place-items: center;
    width: 46px;
    height: 46px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.login-logo {
    width: 28px;
    height: 32px;
}

.login-brand-name {
    color: var(--trias-ash);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    line-height: 1.3;
}

.login-brand-sub {
    margin-top: 3px;
    color: var(--text-secondary);
    font-size: 0.67rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.login-card {
    overflow: hidden;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.login-intro {
    padding: 32px;
    background: var(--trias-ash);
    border-top: 4px solid var(--trias-teal);
    color: var(--text-inverse);
}

.login-eyebrow {
    font-size: 0.66rem;
    font-weight: 600;
    letter-spacing: 1.6px;
    color: #a9d3cc;
}

.login-intro h1 {
    margin: 12px 0 10px;
    font-size: clamp(1.4rem, 5vw, 1.7rem);
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.6px;
}

.login-intro p {
    color: #d0d9e4;
    font-size: 0.87rem;
    line-height: 1.75;
}

.login-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 18px;
}

.login-features > span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #d0d9e4;
    font-size: 0.72rem;
}

.login-features .svg-icon {
    color: #a9d3cc;
}

.login-content {
    padding: 30px 32px;
}

.login-content h2 {
    color: var(--trias-ash);
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-description {
    color: var(--text-secondary);
    font-size: 0.84rem;
    line-height: 1.75;
    margin-bottom: 24px;
}

.login-microsoft {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 50px;
    padding: 12px 16px;
    border: 1px solid #c9d8df;
    border-radius: var(--radius-sm);
    background: var(--white-blue);
    color: var(--trias-ash);
    font-size: 0.86rem;
    font-weight: 600;
}

.login-microsoft > svg {
    flex-shrink: 0;
}

.login-microsoft:hover {
    color: var(--trias-ash);
    background: #cbdcde;
    border-color: var(--teal);
}

.login-microsoft:focus-visible {
    outline: 3px solid var(--teal);
    outline-offset: 4px;
}

.login-arrow {
    display: inline-flex;
    margin-left: auto;
}

.login-help {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.login-help span {
    color: var(--trias-ash);
    font-weight: 500;
}

.login-error {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px;
    margin-bottom: 20px;
    border: 1px solid rgba(192,80,77,0.25);
    border-radius: var(--radius-sm);
    background: rgba(192,80,77,0.08);
    color: #963d3b;
    font-size: 0.8rem;
    overflow-wrap: anywhere;
}

.login-footer {
    margin-top: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.72rem;
}

@media (max-width: 480px) {
    .login-page { padding: 28px 16px; }
    .login-intro, .login-content { padding: 26px 22px; }
    .login-microsoft { gap: 10px; padding: 12px; }
}

/* --- SVG Icons --- */
.svg-icon {
    display: inline-block;
    width: 1.15em;
    height: 1.15em;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    vertical-align: -0.16em;
    flex-shrink: 0;
    transition: var(--transition);
}

.icon-xs { width: 14px; height: 14px; }
.icon-sm { width: 16px; height: 16px; }
.icon-md { width: 20px; height: 20px; }
.icon-lg { width: 24px; height: 24px; }
.icon-xl { width: 32px; height: 32px; }
.icon-2xl { width: 48px; height: 48px; }

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

/* --- Sidebar --- */
.sidebar {
    width: 250px;
    background: var(--bg-sidebar);
    color: var(--text-inverse);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

.brand-logo-badge {
    width: 42px;
    height: 42px;
    background: #ffffff;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.22);
    flex-shrink: 0;
    transition: var(--transition);
}

.brand-link:hover .brand-logo-badge {
    transform: translateY(-1px) scale(1.05);
    box-shadow: 0 4px 14px rgba(102, 167, 159, 0.35);
}

.sidebar-logo {
    width: 100%;
    height: 100%;
    max-width: 28px;
    max-height: 28px;
    display: block;
    object-fit: contain;
}

.brand-text {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.brand-text .brand-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.3px;
    line-height: 1.2;
}

.brand-text .brand-sub {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.5);
    margin-top: 3px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 0;
    overflow-y: auto;
}

.sidebar-nav .nav-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: rgba(255,255,255,0.3);
    padding: 12px 24px 6px;
    font-weight: 600;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 24px;
    color: rgba(255,255,255,0.6);
    font-size: 0.88rem;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: var(--transition);
}

.sidebar-nav a:hover {
    color: #ffffff;
    background: rgba(255,255,255,0.05);
}

.sidebar-nav a.active {
    color: #ffffff;
    background: rgba(102,167,159,0.15);
    border-left-color: var(--trias-teal);
}

.sidebar-nav a .nav-icon {
    width: 22px;
    height: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

.sidebar-nav a .nav-icon .svg-icon {
    width: 19px;
    height: 19px;
    vertical-align: middle;
}

.sidebar-nav a:hover .nav-icon,
.sidebar-nav a.active .nav-icon {
    color: #ffffff;
}

.sidebar-nav a.active .nav-icon {
    color: var(--trias-teal);
}

.sidebar-nav a .nav-badge {
    margin-left: auto;
    background: var(--trias-teal);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 22px;
    text-align: center;
}

/* --- Sidebar account --- */
.sidebar-account {
    margin: 24px 14px 0;
    padding: 14px;
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(102,167,159,0.13), rgba(255,255,255,0.03));
}

.sidebar-account-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-account-avatar {
    display: grid;
    place-items: center;
    flex: 0 0 38px;
    height: 38px;
    border-radius: 12px;
    background: rgba(102,167,159,0.2);
    border: 1px solid rgba(169,211,204,0.25);
    color: #bce5df;
}

.sidebar-account-avatar .svg-icon {
    width: 20px;
    height: 20px;
}

.sidebar-account-details {
    min-width: 0;
}

.sidebar-account-name {
    color: #fff;
    font-size: 0.78rem;
    font-weight: 600;
    line-height: 1.5;
    overflow-wrap: anywhere;
}

.sidebar-account-role {
    display: inline-block;
    margin-top: 5px;
    padding: 2px 7px;
    border-radius: 5px;
    background: rgba(102,167,159,0.16);
    color: #bce5df;
    font-size: 0.65rem;
    font-weight: 500;
}

.sidebar-account-form {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-sign-out {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    min-height: 40px;
    padding: 8px;
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.04);
    color: #dbe5ea;
    font: inherit;
    font-size: 0.76rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.sidebar-sign-out .svg-icon {
    width: 16px;
    height: 16px;
}

.sidebar-sign-out:hover {
    background: rgba(192,80,77,0.18);
    border-color: rgba(244,170,166,0.4);
    color: #ffd3d0;
}

.sidebar-sign-out:focus-visible {
    outline: 2px solid #bce5df;
    outline-offset: 3px;
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    margin-left: 250px;
    min-height: 100vh;
}

.page-header {
    background: var(--bg-primary);
    padding: 20px 32px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.page-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--trias-ash);
    letter-spacing: -0.3px;
}

.page-header .header-actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

.page-body {
    padding: 28px 32px;
}

/* --- Cards --- */
.card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--trias-ash);
}

.card-body {
    padding: 22px;
}

.card-footer {
    padding: 14px 22px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* --- Stat Cards --- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}

@media (max-width: 1240px) {
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.stat-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
    min-height: 140px;
}

a.stat-card {
    text-decoration: none;
    color: inherit;
}

a.stat-card:hover {
    color: inherit;
}

/* Elegant top hairline indicator */
.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0.9;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: height 0.2s ease, opacity 0.2s ease;
}

.stat-card.accent-blue::after    { background: var(--blue); }
.stat-card.accent-warning::after { background: var(--warning); }
.stat-card.accent-danger::after  { background: var(--danger); }
.stat-card.accent-success::after { background: var(--success); }
.stat-card.accent-teal::after    { background: var(--trias-teal); }

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 24px rgba(30, 52, 83, 0.08);
    border-color: rgba(30, 52, 83, 0.16);
}

.stat-card:hover::after {
    height: 4px;
    opacity: 1;
}

/* Header Row */
.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.stat-card .stat-label {
    font-size: 0.83rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: -0.01em;
    line-height: 1.25;
}

.stat-card .stat-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    flex-shrink: 0;
    transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.stat-card.accent-blue .stat-icon    { color: #3b6ea5; background: rgba(105, 136, 180, 0.14); border: 1px solid rgba(105, 136, 180, 0.22); }
.stat-card.accent-warning .stat-icon { color: #b5801c; background: rgba(212, 160, 60, 0.14); border: 1px solid rgba(212, 160, 60, 0.24); }
.stat-card.accent-danger .stat-icon  { color: #b03835; background: rgba(192, 80, 77, 0.14); border: 1px solid rgba(192, 80, 77, 0.24); }
.stat-card.accent-success .stat-icon { color: #2e8b5d; background: rgba(72, 168, 124, 0.14); border: 1px solid rgba(72, 168, 124, 0.24); }
.stat-card.accent-teal .stat-icon    { color: #3e857c; background: rgba(102, 167, 159, 0.14); border: 1px solid rgba(102, 167, 159, 0.24); }

.stat-card:hover .stat-icon {
    transform: scale(1.08);
}

/* Metric Value */
.stat-card .stat-value {
    font-size: 2.15rem;
    font-weight: 700;
    color: var(--trias-ash);
    line-height: 1;
    letter-spacing: -0.03em;
    font-feature-settings: "tnum";
    font-variant-numeric: tabular-nums;
    margin-bottom: 12px;
}

/* Footer Row */
.stat-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: auto;
    padding-top: 4px;
}

.stat-card .stat-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 8px;
    border-radius: 6px;
    font-size: 0.72rem;
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: 0.01em;
}

.stat-card.accent-blue .stat-badge {
    background: rgba(105, 136, 180, 0.12);
    color: #315886;
}
.stat-card.accent-warning .stat-badge {
    background: rgba(212, 160, 60, 0.14);
    color: #93630f;
}
.stat-card.accent-danger .stat-badge {
    background: rgba(192, 80, 77, 0.14);
    color: #9e2a27;
}
.stat-card.accent-success .stat-badge {
    background: rgba(72, 168, 124, 0.14);
    color: #216d47;
}
.stat-card.accent-teal .stat-badge {
    background: rgba(102, 167, 159, 0.14);
    color: #2b6a62;
}

.stat-card .stat-arrow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    opacity: 0.35;
    transition: transform 0.2s ease, opacity 0.2s ease, color 0.2s ease;
}

.stat-card:hover .stat-arrow {
    opacity: 1;
    transform: translateX(3px);
    color: var(--trias-ash);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
}

.btn .svg-icon {
    margin-top: -1px;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: var(--trias-teal);
    color: #fff;
}
.btn-primary:hover {
    background: var(--teal);
    color: #fff;
}

.btn-secondary {
    background: var(--white-blue);
    color: var(--trias-ash);
}
.btn-secondary:hover {
    background: var(--gray);
}

.btn-outline {
    background: transparent;
    color: var(--trias-ash);
    border: 1.5px solid var(--border);
}
.btn-outline:hover {
    border-color: var(--trias-teal);
    color: var(--trias-teal);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}
.btn-danger:hover {
    background: #a5403e;
}

.btn-success {
    background: var(--success);
    color: #fff;
}
.btn-success:hover {
    background: #3d9069;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.78rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 0.95rem;
}

.btn-icon {
    width: 34px;
    height: 34px;
    padding: 0;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

.btn-icon .svg-icon {
    margin: 0;
}

/* --- Tables --- */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

table thead th {
    background: var(--bg-secondary);
    color: var(--trias-ash);
    font-weight: 700;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    padding: 12px 16px;
    text-align: left;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    vertical-align: middle;
}

table tbody tr {
    transition: var(--transition);
}

table tbody tr:hover {
    background: rgba(102,167,159,0.04);
}

table tbody tr:last-child td {
    border-bottom: none;
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    white-space: nowrap;
}

.badge-outstanding {
    background: rgba(212,160,60,0.12);
    color: var(--warning);
}

.badge-paid {
    background: rgba(72,168,124,0.12);
    color: var(--success);
}

.badge-overdue {
    background: rgba(192,80,77,0.12);
    color: var(--danger);
}

.badge-sent {
    background: rgba(102,167,159,0.12);
    color: var(--trias-teal);
}

.badge-failed {
    background: rgba(192,80,77,0.12);
    color: var(--danger);
}

.badge-h7-before {
    background: rgba(105,136,180,0.12);
    color: var(--blue);
}

.badge-h7, .badge-h30, .badge-h60 {
    background: rgba(192,80,77,0.12);
    color: var(--danger);
}

/* --- Forms --- */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--trias-ash);
    margin-bottom: 6px;
    letter-spacing: 0.2px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    font-size: 0.88rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--trias-teal);
    box-shadow: 0 0 0 3px rgba(102,167,159,0.15);
}

.form-control::placeholder {
    color: var(--dark-gray);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23666' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 0.72rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.form-inline {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.form-inline .form-group {
    margin-bottom: 0;
}

/* --- Upload Zone --- */
.upload-zone {
    border: 2px dashed var(--dark-gray);
    border-radius: var(--radius-lg);
    padding: 48px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--bg-primary);
    position: relative;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--trias-teal);
    background: rgba(102,167,159,0.03);
}

.upload-zone.dragover {
    transform: scale(1.01);
    box-shadow: var(--shadow-md);
}

.upload-zone .upload-icon {
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-gray);
    transition: var(--transition);
}

.upload-zone .upload-icon .svg-icon {
    width: 48px;
    height: 48px;
    stroke-width: 1.75;
}

.upload-zone:hover .upload-icon,
.upload-zone.dragover .upload-icon {
    color: var(--trias-teal);
    transform: translateY(-4px) scale(1.05);
}

.upload-zone .upload-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.upload-zone .upload-text strong {
    color: var(--trias-teal);
}

.upload-zone .upload-hint {
    font-size: 0.78rem;
    color: var(--dark-gray);
}

.upload-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

/* --- File selected state --- */
.upload-file-info {
    display: none;
    align-items: center;
    gap: 14px;
    padding: 16px 22px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-top: 18px;
}

.upload-file-info.visible {
    display: flex;
}

.upload-file-info .file-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--trias-teal);
}

.upload-file-info .file-icon .svg-icon {
    width: 28px;
    height: 28px;
}

.upload-file-info .file-details {
    flex: 1;
}

.upload-file-info .file-name {
    font-weight: 600;
    color: var(--trias-ash);
    font-size: 0.88rem;
}

.upload-file-info .file-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* --- Alert / Toast --- */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    margin-bottom: 18px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    border: 1px solid transparent;
}

.alert-success {
    background: rgba(72,168,124,0.08);
    border-color: rgba(72,168,124,0.2);
    color: var(--success);
}

.alert-danger {
    background: rgba(192,80,77,0.08);
    border-color: rgba(192,80,77,0.2);
    color: var(--danger);
}

.alert-warning {
    background: rgba(212,160,60,0.08);
    border-color: rgba(212,160,60,0.2);
    color: var(--warning);
}

.alert-info {
    background: rgba(105,136,180,0.08);
    border-color: rgba(105,136,180,0.2);
    color: var(--blue);
}

/* Toast notification */
.toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 16px 22px;
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 300px;
    max-width: 420px;
    animation: toastSlideIn 0.35s ease;
    border-left: 4px solid var(--trias-teal);
}

.toast.toast-success { border-left-color: var(--success); }
.toast.toast-error   { border-left-color: var(--danger); }
.toast.toast-warning { border-left-color: var(--warning); }

.toast .toast-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

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

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon   { color: var(--danger); }
.toast-warning .toast-icon { color: var(--warning); }
.toast-info .toast-icon    { color: var(--blue); }

.toast .toast-message {
    flex: 1;
    font-size: 0.85rem;
    font-weight: 500;
}

.toast .toast-close {
    cursor: pointer;
    color: var(--dark-gray);
    background: none;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.toast .toast-close:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.toast .toast-close .svg-icon {
    width: 14px;
    height: 14px;
}

@keyframes toastSlideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* --- Modal --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(30,52,83,0.4);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 600px;
    max-height: 85vh;
    overflow-y: auto;
    animation: modalIn 0.25s ease;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--trias-ash);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

@keyframes modalIn {
    from {
        transform: scale(0.95) translateY(10px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

/* --- Loading Spinner --- */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2.5px solid var(--border);
    border-top-color: var(--trias-teal);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

.spinner-lg {
    width: 36px;
    height: 36px;
    border-width: 3px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.85);
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: inherit;
    z-index: 10;
}

.loading-overlay.active {
    display: flex;
}

/* --- Progress bar --- */
.progress-bar {
    height: 6px;
    background: var(--gray);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 12px;
}

.progress-bar .progress-fill {
    height: 100%;
    background: var(--trias-teal);
    border-radius: 3px;
    transition: width 0.4s ease;
}

/* --- Filter Toolbar --- */
.filter-card-body {
    padding: 12px 20px;
}

.filter-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

/* Segmented Tabs Control */
.filter-segmented {
    display: inline-flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 3px;
    gap: 2px;
    height: 36px;
    box-sizing: border-box;
}

.filter-segmented .filter-tab {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0 12px;
    height: 100%;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 4px;
    text-decoration: none;
    transition: var(--transition);
    line-height: 1;
    cursor: pointer;
    box-sizing: border-box;
}

.filter-segmented .filter-tab:hover {
    color: var(--trias-ash);
}

.filter-segmented .filter-tab.active {
    background: var(--bg-primary);
    color: var(--trias-ash);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(30, 52, 83, 0.08);
}

.filter-tab .filter-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 9px;
    font-size: 0.70rem;
    font-weight: 600;
    background: rgba(30, 52, 83, 0.07);
    color: var(--text-secondary);
    transition: var(--transition);
}

.filter-segmented .filter-tab.active .filter-badge {
    background: rgba(102, 167, 159, 0.2);
    color: var(--teal);
}

.filter-tab .filter-badge.badge-warn {
    background: rgba(212, 160, 60, 0.15);
    color: #a0721d;
}

.filter-segmented .filter-tab.active .filter-badge.badge-warn {
    background: rgba(212, 160, 60, 0.25);
    color: #8c6012;
}

/* Filter Search & Actions */
.filter-search-group {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

.filter-search-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.filter-search-icon {
    position: absolute;
    left: 11px;
    color: var(--dark-gray);
    pointer-events: none;
    display: flex;
    align-items: center;
}

.filter-search-input {
    height: 36px;
    width: 270px;
    padding: 0 32px 0 34px;
    font-size: 0.83rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    font-family: inherit;
    box-sizing: border-box;
}

.filter-search-input:focus {
    outline: none;
    border-color: var(--trias-teal);
    box-shadow: 0 0 0 3px rgba(102, 167, 159, 0.15);
}

.filter-search-input::placeholder {
    color: var(--dark-gray);
}

.filter-search-clear {
    position: absolute;
    right: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--gray);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.filter-search-clear:hover {
    background: var(--dark-gray);
    color: #fff;
}

.filter-btn {
    height: 36px;
    padding: 0 16px;
    font-size: 0.83rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: inherit;
    text-decoration: none;
    white-space: nowrap;
    box-sizing: border-box;
}

.filter-btn-primary {
    background: var(--white-blue);
    color: var(--trias-ash);
    border-color: #c9d8df;
}

.filter-btn-primary:hover {
    background: var(--blue);
    color: #fff;
    border-color: var(--blue);
}

.filter-btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border);
}

.filter-btn-outline:hover {
    color: var(--trias-ash);
    border-color: var(--trias-ash);
}

/* --- Tabs --- */
.tab-nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 22px;
}

.tab-nav .tab-btn {
    padding: 10px 20px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    font-family: inherit;
}

.tab-nav .tab-btn:hover {
    color: var(--trias-ash);
}

.tab-nav .tab-btn.active {
    color: var(--trias-teal);
    border-bottom-color: var(--trias-teal);
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-secondary);
}

.empty-state .empty-icon {
    margin-bottom: 16px;
    color: var(--dark-gray);
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state .empty-icon .svg-icon {
    width: 48px;
    height: 48px;
    stroke-width: 1.75;
}

.empty-state .empty-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--trias-ash);
    margin-bottom: 6px;
}

.empty-state .empty-desc {
    font-size: 0.85rem;
    max-width: 360px;
    margin: 0 auto 18px;
}

/* --- Utility --- */
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--text-secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-teal { color: var(--trias-teal); }
.text-ash { color: var(--trias-ash); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }

.w-full { width: 100%; }

/* --- Grid layout helpers --- */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

/* --- Import results --- */
.import-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
    margin: 18px 0;
}

.import-summary .summary-item {
    text-align: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

.import-summary .summary-item .summary-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--trias-ash);
}

.import-summary .summary-item .summary-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
}

/* --- Email preview --- */
.email-preview {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.email-preview .email-header {
    padding: 14px 18px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
}

.email-preview .email-header .email-field {
    margin-bottom: 4px;
}

.email-preview .email-header .email-field strong {
    color: var(--trias-ash);
    display: inline-block;
    width: 60px;
}

.email-preview .email-body {
    padding: 22px;
    font-size: 0.88rem;
    line-height: 1.7;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 22px;
}

.pagination .page-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    color: var(--text-primary);
}

.pagination .page-btn:hover {
    border-color: var(--trias-teal);
    color: var(--trias-teal);
}

.pagination .page-btn.active {
    background: var(--trias-teal);
    color: #fff;
    border-color: var(--trias-teal);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .sidebar-account {
        margin: 20px 8px 0;
        padding: 10px 0 0;
        border: 0;
        border-top: 1px solid rgba(255,255,255,0.12);
        border-radius: 0;
        background: none;
    }
    .sidebar-account-profile {
        justify-content: center;
    }
    .sidebar-account-details,
    .sidebar-sign-out span {
        display: none;
    }
    .sidebar-account-form {
        margin-top: 10px;
        padding-top: 0;
        border: 0;
    }
    .sidebar-sign-out {
        width: 44px;
        min-height: 44px;
        margin: 0 auto;
    }
    .sidebar {
        width: 68px;
    }
    .brand-text,
    .sidebar-nav .nav-label,
    .sidebar-nav a span:not(.nav-icon),
    .sidebar-nav a .nav-badge {
        display: none;
    }
    .sidebar-brand {
        padding: 16px 13px;
        display: flex;
        justify-content: center;
    }
    .brand-link {
        justify-content: center;
    }
    .brand-logo-badge {
        width: 38px;
        height: 38px;
        padding: 5px;
    }
    .sidebar-nav a {
        padding: 13px 0;
        justify-content: center;
    }
    .main-content {
        margin-left: 68px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .page-body {
        padding: 18px 16px;
    }
    .page-header {
        padding: 16px;
        flex-wrap: wrap;
        gap: 12px;
    }
    .page-header .header-actions {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    .grid-2 {
        grid-template-columns: 1fr;
    }
    .filter-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .filter-segmented {
        width: 100%;
        display: flex;
    }
    .filter-segmented .filter-tab {
        flex: 1;
        justify-content: center;
        padding: 0 6px;
        font-size: 0.78rem;
    }
    .filter-search-group {
        width: 100%;
        margin-left: 0;
    }
    .filter-search-wrap {
        flex: 1;
    }
    .filter-search-input {
        width: 100%;
    }
}

/* Payment risk: cached AI assessment, independent of invoice/reminder controls. */
.payment-risk-panel .card-header { flex-wrap: wrap; gap: 12px; }
.risk-summary { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0; }
.risk-summary-item { display: flex; align-items: center; gap: 8px; padding: 10px; border: 1px solid var(--border, #e5e7eb); border-radius: 8px; color: inherit; }
.risk-filters { display: flex; flex-wrap: wrap; align-items: end; gap: 12px; }
.risk-filters label { display: flex; flex-direction: column; gap: 6px; font-size: .85rem; }
.risk-filters input, .risk-filters select { padding: 8px 10px; border: 1px solid var(--border, #e5e7eb); border-radius: 6px; max-width: 100%; background: white; color: #1f2937; }
.risk-high { background: #fee2e2; color: #991b1b; }
.risk-medium { background: #fef3c7; color: #92400e; }
.risk-low { background: #dcfce7; color: #166534; }
.risk-unscored, .risk-limited { background: #f3f4f6; color: #4b5563; }
.risk-note { display: block; color: #6b7280; font-size: .75rem; margin-top: 5px; }
.risk-caption { font-size: .78rem; margin-top: 12px; }
.risk-reasons { min-width: 220px; max-width: 420px; white-space: normal; }
.risk-reasons ul { margin: 0; padding-left: 18px; }