:root {
    --bg: #eef4ff;
    --bg-strong: #dfeaff;
    --card: rgba(255, 255, 255, 0.9);
    --card-strong: rgba(255, 255, 255, 0.98);
    --line: rgba(24, 69, 146, 0.12);
    --text: #13233f;
    --muted: #5f7396;
    --primary: #1f5fd6;
    --primary-dark: #184cb0;
    --primary-soft: #dce8ff;
    --danger: #c64040;
    --shadow: 0 20px 48px rgba(29, 66, 130, 0.12);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: "Segoe UI", "Trebuchet MS", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(31, 95, 214, 0.18), transparent 28%),
        radial-gradient(circle at bottom right, rgba(90, 154, 255, 0.18), transparent 24%),
        linear-gradient(135deg, #f5f9ff 0%, #eaf2ff 100%);
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    border: 0;
    cursor: pointer;
}

input,
select,
textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.96);
    color: var(--text);
}

textarea {
    resize: vertical;
}

.hidden {
    display: none !important;
}

.app-shell {
    display: grid;
    grid-template-columns: 300px 1fr;
    min-height: 100vh;
}

.sidebar {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background: rgba(245, 249, 255, 0.74);
    backdrop-filter: blur(18px);
    border-right: 1px solid rgba(255, 255, 255, 0.7);
}

.brand-card,
.side-card,
.topbar,
.auth-card,
.card,
.panel,
.modal-card,
.stats-grid article {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.brand-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
}

.brand-mark {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    color: #fff;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.brand-overline,
.side-label,
.topbar-label {
    margin: 0 0 6px;
    font-size: 12px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.brand-card h1,
.topbar h2,
.panel-head h3,
.modal-head h3 {
    margin: 0;
    font-size: 28px;
    line-height: 1.1;
}

.side-card {
    padding: 18px;
}

.status-line {
    display: flex;
    align-items: center;
    gap: 10px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 0 6px rgba(31, 95, 214, 0.14);
}

.nav {
    display: grid;
    gap: 8px;
}

.nav-link,
.button,
.button-secondary,
.tab-button,
.icon-button {
    border-radius: 16px;
    transition: background 0.18s ease, transform 0.18s ease, color 0.18s ease;
}

.nav-link {
    text-align: left;
    padding: 13px 16px;
    background: transparent;
    color: var(--text);
}

.nav-link:hover,
.button:hover,
.button-secondary:hover,
.tab-button:hover,
.icon-button:hover {
    transform: translateY(-1px);
}

.nav-link.is-active {
    background: var(--primary-soft);
    color: var(--primary-dark);
}

.side-footer {
    margin-top: auto;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
}

.side-note {
    margin: 4px 0 0;
    color: var(--muted);
}

.main {
    padding: 24px;
    display: grid;
    gap: 20px;
}

.topbar {
    padding: 24px;
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 20px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(232, 241, 255, 0.9));
}

.topbar-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(92px, 1fr));
    gap: 12px;
}

.topbar-metrics article {
    padding: 14px 16px;
    border-radius: 18px;
    background: var(--card-strong);
    border: 1px solid var(--line);
    text-align: center;
}

.topbar-metrics span {
    display: block;
    font-size: 28px;
    font-weight: 700;
}

.topbar-metrics small {
    color: var(--muted);
}

.auth-wrap {
    display: flex;
    justify-content: center;
}

.auth-card {
    width: min(100%, 460px);
    padding: 22px;
}

.tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
}

.tab-button,
.button-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--text);
    padding: 12px 14px;
}

.tab-button.is-active {
    background: var(--primary-soft);
    color: var(--primary-dark);
}

.button {
    padding: 13px 18px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
}

.button-secondary {
    border: 1px solid var(--line);
}

.workspace {
    display: grid;
    gap: 18px;
}

.panel {
    padding: 18px;
}

.panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.panel-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.card {
    padding: 16px;
}

.detail-card {
    min-height: 420px;
}

.list-stack {
    display: grid;
    gap: 12px;
}

.list-item {
    display: grid;
    gap: 10px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(247, 250, 255, 0.96);
}

.list-item.is-selected {
    border-color: rgba(31, 95, 214, 0.35);
    background: var(--primary-soft);
}

.list-head,
.meta-row,
.detail-actions,
.comment-form {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.muted {
    margin: 0;
    color: var(--muted);
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 6px 10px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 600;
}

.detail-block {
    display: grid;
    gap: 18px;
}

.detail-section {
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.detail-section:first-child {
    padding-top: 0;
    border-top: 0;
}

.timeline {
    display: grid;
    gap: 10px;
}

.timeline-item {
    padding: 14px;
    border-radius: 16px;
    background: rgba(244, 248, 255, 0.98);
    border: 1px solid var(--line);
}

.timeline-item pre {
    margin: 8px 0 0;
    white-space: pre-wrap;
    word-break: break-word;
    color: var(--muted);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
}

.stats-grid article {
    padding: 18px;
}

.stats-grid strong {
    display: block;
    font-size: 30px;
}

.stats-grid span {
    color: var(--muted);
}

.form-grid {
    display: grid;
    gap: 14px;
}

label {
    display: grid;
    gap: 8px;
}

label span {
    font-size: 14px;
    color: var(--muted);
}

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-row input {
    width: 18px;
    height: 18px;
}

.empty-state {
    margin: 0;
    color: var(--muted);
}

.modal {
    border: 0;
    padding: 0;
    background: transparent;
}

.modal::backdrop {
    background: rgba(17, 32, 62, 0.28);
    backdrop-filter: blur(6px);
}

.modal-card {
    width: min(92vw, 520px);
    padding: 22px;
}

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.icon-button {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text);
    font-size: 26px;
}

.toast-stack {
    position: fixed;
    top: 18px;
    right: 18px;
    display: grid;
    gap: 10px;
    z-index: 200;
}

.toast {
    min-width: 260px;
    max-width: 360px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(19, 35, 63, 0.96);
    color: #fff;
    box-shadow: var(--shadow);
}

.toast.error {
    background: rgba(198, 64, 64, 0.96);
}

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

    .sidebar {
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.7);
    }

    .topbar,
    .content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .sidebar,
    .main {
        padding: 16px;
    }

    .panel-head,
    .list-head,
    .meta-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .topbar-metrics,
    .stats-grid {
        grid-template-columns: 1fr;
    }
}