:root {
    --o365-brand: #0f6cbd;
    --o365-brand-dark: #0c4a8a;
    --o365-accent: #e75502;
    --o365-bg: #f4f7fb;
    --o365-card: #ffffff;
    --o365-muted: #5f6b7c;
    --o365-border: #d7e0ef;
    --o365-success: #0f995c;
    --o365-danger: #c41b1b;
    --o365-warning: #e0a106;
    --o365-radius: 12px;
    --o365-shadow: 0 10px 35px rgba(8, 30, 70, 0.12);
    font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top, rgba(15, 108, 189, 0.12), transparent 55%),
        radial-gradient(circle at 20% 20%, rgba(231, 85, 2, 0.08), transparent 45%),
        var(--o365-bg);
    color: #1f2430;
    font-family: inherit;
}

header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: linear-gradient(120deg, #061a3a, #0f6cbd);
    color: #fff;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    gap: 32px;
    box-shadow: 0 12px 30px rgba(6, 26, 58, 0.3);
}

header img {
    width: 130px;
    height: auto;
}

#menu-toggle {
    display: none;
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.45);
    color: #fff;
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 24px;
    cursor: pointer;
}

#nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-left: auto;
}

.header-button {
    background: rgba(255, 255, 255, 0.08);
    padding: 10px 18px;
    border-radius: 999px;
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    letter-spacing: 0.03em;
    transition: background 0.2s ease, transform 0.2s ease, border 0.2s;
}

.header-button:hover,
.header-button:focus,
.header-button.active {
    background: #fff;
    color: var(--o365-brand-dark);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
}

#xero-connection-btn {
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.35);
}

#xero-connection-btn.ok {
    background: rgba(15, 153, 92, 0.15);
    border-color: rgba(15, 153, 92, 0.6);
}

#xero-connection-btn.error {
    background: rgba(196, 27, 27, 0.25);
    border-color: rgba(196, 27, 27, 0.65);
}

.content {
    max-width: 1200px;
    margin: 32px auto 80px;
    padding: 0 24px 40px;
}

.content > * + * {
    margin-top: 24px;
}

.flash-messages {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.flash-messages li {
    background: var(--o365-card);
    border-left: 6px solid var(--o365-accent);
    padding: 12px 18px;
    border-radius: var(--o365-radius);
    color: var(--o365-muted);
    box-shadow: var(--o365-shadow);
}

.container {
    background: transparent;
}

.tiles {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tile {
    background: var(--o365-card);
    border-radius: var(--o365-radius);
    padding: 26px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    text-decoration: none;
    color: #071938;
    font-weight: 600;
    box-shadow: var(--o365-shadow);
    border: 1px solid transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s;
}

.tile .icon {
    font-size: 36px;
    color: var(--o365-brand);
}

.tile:hover {
    transform: translateY(-6px);
    border-color: var(--o365-brand);
    box-shadow: 0 15px 40px rgba(15, 108, 189, 0.2);
}

.card,
.panel,
.section-box {
    background: var(--o365-card);
    border-radius: var(--o365-radius);
    padding: 24px;
    box-shadow: var(--o365-shadow);
    border: 1px solid var(--o365-border);
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: #071938;
}

.grid-two-col {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}

.table-card {
    background: var(--o365-card);
    border-radius: var(--o365-radius);
    overflow: hidden;
    box-shadow: var(--o365-shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--o365-card);
}

th,
td {
    padding: 14px 16px;
    text-align: left;
    border-bottom: 1px solid var(--o365-border);
}

th {
    background: rgba(15, 108, 189, 0.07);
    font-weight: 600;
    color: #071938;
    text-transform: uppercase;
    font-size: 0.85rem;
}

tbody tr:hover {
    background: rgba(15, 108, 189, 0.04);
}

form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

label {
    font-weight: 600;
    color: #091d3c;
    margin-bottom: 4px;
}

input,
select,
textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 10px;
    border: 1px solid var(--o365-border);
    font-size: 1rem;
    font-family: inherit;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--o365-brand);
    box-shadow: 0 0 0 3px rgba(15, 108, 189, 0.15);
}

button,
.link-button,
input[type="submit"],
.button-primary {
    border: none;
    border-radius: 999px;
    padding: 12px 22px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    cursor: pointer;
    background: linear-gradient(120deg, var(--o365-brand), var(--o365-brand-dark));
    color: #fff;
    box-shadow: 0 10px 25px rgba(15, 108, 189, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover,
.link-button:hover,
input[type="submit"]:hover,
.button-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 30px rgba(15, 108, 189, 0.4);
}

button.secondary,
.button-secondary {
    background: linear-gradient(120deg, #f0f2f7, #dfe7f4);
    color: #071938;
    box-shadow: none;
}

.receipts-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 24px;
}

.receipt-list,
.receipt-viewer {
    background: var(--o365-card);
    border-radius: var(--o365-radius);
    padding: 20px;
    box-shadow: var(--o365-shadow);
}

.receipt-viewer {
    max-height: 80vh;
    overflow: auto;
}

.receipt-viewer canvas {
    border-radius: 10px;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.04);
}

.invoice-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 18px;
}

.field-box {
    border-radius: 12px;
    border: 1px solid var(--o365-border);
    padding: 14px 16px;
    background: #f9fbff;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field-box.full {
    grid-column: 1 / -1;
}

.field-box.action-box {
    align-items: flex-start;
}

.status-split {
    display: inline-flex;
    gap: 6px;
    align-items: center;
    font-size: 0.85rem;
    color: var(--o365-muted);
}

.badge,
.status-pill {
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.success {
    background: rgba(15, 153, 92, 0.12);
    color: var(--o365-success);
}

.badge.warning {
    background: rgba(224, 161, 6, 0.15);
    color: var(--o365-warning);
}

.badge.error {
    background: rgba(196, 27, 27, 0.15);
    color: var(--o365-danger);
}

.pagination,
.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.list-group {
    border-radius: var(--o365-radius);
    border: 1px solid var(--o365-border);
    overflow: hidden;
}

.list-group-item {
    padding: 16px 20px;
    border-bottom: 1px solid var(--o365-border);
    background: #fff;
}

.list-group-item:last-child {
    border-bottom: none;
}

/* Risk & Vulnerabilities page tweaks */
.risks-page,
.risks-page .vulnerabilities,
.risks-page .vulnerabilities *,
.risks-page .vulnerability,
.risks-page .vulnerability *,
.risks-page .popup,
.risks-page .popup * {
    color: #ffffff;
}

@media (max-width: 960px) {
    header {
        flex-wrap: wrap;
        padding: 18px;
    }

    #menu-toggle {
        display: inline-flex;
        margin-left: auto;
    }

    #nav-links {
        width: 100%;
        flex-direction: column;
        display: none;
        margin-top: 12px;
    }

    #nav-links.open {
        display: flex;
    }

    .receipts-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .content {
        padding: 0 18px 32px;
    }

    header img {
        width: 100px;
    }
}