:root {
    --color-navy: #0f2744;
    --color-navy-soft: #1a3a5c;
    --color-blue: #2a5298;
    --color-accent: #3b82f6;
    --color-accent-deep: #1e40af;
    --color-page: #f0f4f8;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-success: #0f766e;
    --shadow-soft: 0 24px 60px rgba(15, 39, 68, 0.08);
    --shadow-panel: 0 16px 30px rgba(15, 39, 68, 0.06);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 12px;
    --space-1: 0.5rem;
    --space-2: 0.75rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --font-heading: "Manrope", sans-serif;
    --font-body: "Source Sans 3", sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--color-text);
    background:
        radial-gradient(circle at top right, rgba(59, 130, 246, 0.16), transparent 20rem),
        linear-gradient(180deg, #f7fbff 0%, var(--color-page) 55%, #edf2f7 100%);
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 100%;
    display: block;
}

.layout {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    padding: var(--space-5);
    background: linear-gradient(180deg, var(--color-navy) 0%, var(--color-navy-soft) 100%);
    color: #fff;
}

.brand {
    display: block;
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.95);
}

.brand img {
    width: 100%;
}

.sidebar-footer span {
    color: rgba(255, 255, 255, 0.68);
}

.sidebar-nav {
    margin-top: var(--space-5);
}

.nav-group + .nav-group {
    margin-top: var(--space-4);
}

.nav-group-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    list-style: none;
    cursor: pointer;
    user-select: none;
    margin: 0;
    padding: 0.3rem 0 var(--space-2);
    font-size: 0.94rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #fff;
}

.nav-group-title::-webkit-details-marker {
    display: none;
}

.nav-group-title::after {
    content: '';
    display: block;
    width: 7px;
    height: 7px;
    border-right: 1.5px solid rgba(255, 255, 255, 0.82);
    border-bottom: 1.5px solid rgba(255, 255, 255, 0.82);
    transform: rotate(45deg);
    transition: transform 0.2s ease;
    flex-shrink: 0;
    margin-bottom: 2px;
}

.nav-group[open] > .nav-group-title::after {
    transform: rotate(-135deg);
}

.nav-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 0.35rem;
}

.nav-group a {
    display: block;
    padding: 0.78rem 0.95rem;
    border-radius: 999px;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.nav-group a:hover,
.nav-group a.is-active {
    background: rgba(255, 255, 255, 0.12);
    transform: translateX(2px);
}

.sidebar-footer {
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.14);
    display: grid;
    gap: 0.35rem;
}

.sidebar-footer p {
    margin: 0;
    font-weight: 600;
}

.logout-form {
    margin: 0;
}

.logout-button {
    margin-top: var(--space-2);
    padding: 0;
    border: 0;
    background: transparent;
    color: #fff;
    font: inherit;
    text-align: left;
    cursor: pointer;
}

.logout-button:hover {
    text-decoration: underline;
}

.workspace {
    padding: var(--space-5);
}

.topbar {
    display: flex;
    gap: var(--space-4);
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.topbar-copy {
    max-width: 780px;
}

.topbar-copy h1 {
    margin: 0.25rem 0;
    font-family: var(--font-heading);
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.05;
}

.topbar-copy p {
    margin: 0;
    color: var(--color-text-muted);
    font-size: 1.05rem;
}

.eyebrow {
    margin: 0;
    color: var(--color-blue);
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.75rem;
}

.page-content {
    display: grid;
    gap: var(--space-4);
}

.panel,
.metric {
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(226, 232, 240, 0.92);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-panel);
}

.panel {
    padding: var(--space-4);
}

.panel-heading h2,
.summary-panel h2,
.form-section h2 {
    margin: 0 0 0.35rem;
    font-family: var(--font-heading);
}

.panel-heading p,
.section-heading p,
.summary-panel p,
.field-help,
.empty-slot,
.empty-state,
.documentation-item p,
.stack-list span {
    color: var(--color-text-muted);
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-3);
}

.metric {
    padding: var(--space-4);
}

.metric span {
    display: block;
    font-size: 0.92rem;
    color: var(--color-text-muted);
}

.metric strong {
    display: block;
    margin-top: 0.4rem;
    font-family: var(--font-heading);
    font-size: 2rem;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.toolbar-search,
.toolbar-actions,
.toolbar-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.toolbar-search {
    flex: 1 1 240px;
}

.toolbar-search input,
.toolbar-actions input,
.toolbar-actions select,
.field-group input,
.field-group textarea,
.field-group select {
    width: 100%;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    background: #f8fbff;
    padding: 0.85rem 1rem;
    font: inherit;
    color: var(--color-text);
}

.field-group textarea {
    min-height: 132px;
    resize: vertical;
}

.field-group ul {
    list-style: none;
    padding: 0;
    margin: 0.75rem 0 0;
    display: grid;
    gap: 0.65rem;
}

.field-group label {
    display: block;
    margin-bottom: 0.4rem;
    font-weight: 700;
}

.field-error {
    margin: 0.35rem 0 0;
    color: #b91c1c;
    font-size: 0.92rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    min-height: 46px;
    padding: 0.8rem 1.2rem;
    border-radius: 999px;
    border: none;
    font-family: var(--font-heading);
    font-size: inherit;
    font-weight: 700;
    cursor: pointer;
}

.button-primary {
    background: var(--color-navy);
    color: #fff;
}

.button-primary:hover {
    background: var(--color-navy-soft);
}

.button-secondary {
    background: rgba(42, 82, 152, 0.1);
    color: var(--color-blue);
}

.button-ghost {
    background: transparent;
    color: var(--color-blue);
    border: 1px solid rgba(42, 82, 152, 0.18);
}

.button-full {
    width: 100%;
}

.tab {
    padding: 0.8rem 1rem;
    border-radius: 999px;
    color: var(--color-text-muted);
    background: rgba(226, 232, 240, 0.5);
    font-weight: 700;
}

.tab.is-active {
    background: rgba(59, 130, 246, 0.12);
    color: var(--color-blue);
}

.calendar-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.month-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--space-2);
}

.calendar-day,
.week-column,
.timeline-row {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fcfdff;
}

.calendar-day {
    min-height: 210px;
    display: flex;
    flex-direction: column;
    padding: 0.95rem;
}

.calendar-day.is-muted {
    opacity: 0.5;
}

.calendar-day-head,
.week-column header,
.timeline-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.link-action {
    color: var(--color-blue);
    font-weight: 700;
}

.calendar-events,
.week-events,
.timeline-content {
    display: grid;
    gap: 0.7rem;
}

.calendar-event {
    display: grid;
    gap: 0.25rem;
    padding: 0.9rem;
    border-radius: 16px;
    background: linear-gradient(180deg, rgba(59, 130, 246, 0.12) 0%, rgba(42, 82, 152, 0.08) 100%);
    border: 1px solid rgba(59, 130, 246, 0.15);
}

.calendar-event strong {
    font-family: var(--font-heading);
}

.calendar-event.is-complete {
    background: rgba(15, 118, 110, 0.12);
    border-color: rgba(15, 118, 110, 0.18);
}

.week-grid {
    display: grid;
    grid-template-columns: repeat(7, minmax(0, 1fr));
    gap: var(--space-2);
}

.week-column,
.timeline-row {
    padding: var(--space-3);
}

.day-timeline {
    display: grid;
    gap: var(--space-2);
}

.timeline-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-3);
}

.two-column-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

.stack-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1rem;
}

.stack-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-3);
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.form-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: var(--space-3);
    align-items: start;
}

.stack-form {
    display: grid;
    gap: var(--space-4);
}

.form-section + .form-section {
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
}

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

.form-actions {
    display: flex;
    gap: var(--space-2);
    justify-content: flex-end;
}

.summary-panel {
    position: sticky;
    top: var(--space-4);
}

.summary-list {
    display: grid;
    gap: var(--space-3);
}

.summary-list dt {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-muted);
}

.summary-list dd {
    margin: 0.3rem 0 0;
    font-family: var(--font-heading);
    font-size: 1.1rem;
}

.table-wrap {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 1rem 0.85rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

.data-table th {
    color: var(--color-text-muted);
    font-size: 0.84rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--color-blue);
    font-weight: 700;
}

.status-badge.complete {
    background: rgba(15, 118, 110, 0.12);
    color: var(--color-success);
}

.documentation-list {
    display: grid;
    gap: var(--space-3);
}

.documentation-item {
    display: flex;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.formset-list {
    display: grid;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.formset-item {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    background: #fbfdff;
    border: 1px solid var(--color-border);
}

.field-inline-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.field-inline-toggle label {
    margin: 0;
}

.field-inline-toggle input {
    width: auto;
}

.formula-preview-list {
    display: grid;
    gap: var(--space-3);
}

.formula-preview-item {
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid rgba(59, 130, 246, 0.18);
    background: rgba(59, 130, 246, 0.06);
}

.formula-preview-item header {
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.formula-preview-item.is-warning {
    border-color: rgba(185, 28, 28, 0.22);
    background: rgba(185, 28, 28, 0.06);
}

.messages {
    display: grid;
    gap: 0.75rem;
    margin-bottom: var(--space-4);
}

.message {
    padding: 1rem 1.2rem;
    border-radius: 18px;
    background: rgba(59, 130, 246, 0.12);
    color: var(--color-blue);
}

.message.success {
    background: rgba(15, 118, 110, 0.12);
    color: var(--color-success);
}

.message.error {
    background: rgba(185, 28, 28, 0.12);
    color: #b91c1c;
}

.auth-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--space-5);
}

.auth-panel {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(340px, 420px);
    gap: var(--space-5);
    align-items: stretch;
    width: min(1100px, 100%);
}

.auth-copy {
    padding: var(--space-6);
    border-radius: 36px;
    background: linear-gradient(145deg, rgba(15, 39, 68, 0.95) 0%, rgba(26, 58, 92, 0.88) 100%);
    color: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-soft);
}

.auth-copy h1 {
    margin: 0.5rem 0 1rem;
    font-family: var(--font-heading);
    font-size: clamp(2.4rem, 4vw, 4rem);
    line-height: 0.98;
}

.auth-highlights {
    margin: 2rem 0 0;
    padding-left: 1.1rem;
    display: grid;
    gap: 0.7rem;
}

.auth-card {
    padding: var(--space-5);
    border-radius: 36px;
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(226, 232, 240, 0.9);
    box-shadow: var(--shadow-soft);
}

.auth-logo {
    width: 220px;
    margin-bottom: var(--space-4);
}

.backdrop {
    display: none;
}

.icon-button {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
    min-width: 52px;
    min-height: 52px;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.94);
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.icon-button:hover {
    background: #fff;
    border-color: rgba(42, 82, 152, 0.22);
}

.icon-button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.icon-button.is-active {
    background: rgba(42, 82, 152, 0.12);
    border-color: rgba(42, 82, 152, 0.3);
}

.icon-button span {
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 999px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.icon-button.is-active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.icon-button.is-active span:nth-child(2) {
    opacity: 0;
}

.icon-button.is-active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.sidebar-collapse-btn {
    display: flex;
    justify-content: flex-end;
    width: 100%;
    margin-bottom: var(--space-3);
    padding: 0;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.38);
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    transition: color 0.15s ease;
}

.sidebar-collapse-btn:hover {
    color: #fff;
}

.layout.sidebar-collapsed {
    grid-template-columns: 0 minmax(0, 1fr);
}

.layout.sidebar-collapsed .sidebar {
    padding: 0;
    overflow: hidden;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

@media (max-width: 1180px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        inset: 0 auto 0 0;
        width: min(320px, 86vw);
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        z-index: 20;
    }

    .sidebar.is-open {
        transform: translateX(0);
    }

    .backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, 0.38);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.25s ease;
        z-index: 10;
    }

    .backdrop.is-open {
        opacity: 1;
        pointer-events: auto;
    }

    .workspace {
        padding: var(--space-4);
    }

    .sidebar-collapse-btn {
        display: none;
    }

    .metrics-grid,
    .two-column-grid,
    .form-layout,
    .auth-panel {
        grid-template-columns: 1fr;
    }

    .month-grid,
    .week-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 720px) {
    .topbar {
        flex-direction: column;
    }

    .toolbar,
    .toolbar-actions,
    .toolbar-tabs,
    .form-actions,
    .documentation-item,
    .calendar-navigation,
    .formula-preview-item header {
        flex-direction: column;
        align-items: stretch;
    }

    .month-grid,
    .week-grid,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .timeline-row {
        grid-template-columns: 1fr;
    }

    .button,
    .toolbar-actions > * {
        width: 100%;
    }
}