/* =========================================================
   STRATAFLEET UI — CARD / COMPONENT LAYER
   Owns:
   - reusable layout grids
   - panels
   - KPI cards
   - section headers
   - table shells
   - list rows
   - empty states
   - chart card wrappers
   - metric / status micro-components

   Does NOT own:
   - sidebar
   - shell/header layout
   - page-specific dashboard geometry
   ========================================================= */


/* =========================================================
   REUSABLE GRID SYSTEM
   ========================================================= */

.sf-grid-kpi {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.sf-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.sf-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.sf-grid-main {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(300px, 1fr);
    gap: 16px;
}

.sf-stack-10 {
    display: grid;
    gap: 10px;
}

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

.sf-stack-14 {
    display: grid;
    gap: 14px;
}

.sf-stack-16 {
    display: grid;
    gap: 16px;
}

.sf-stack-18 {
    display: grid;
    gap: 18px;
}

.sf-stack-20 {
    display: grid;
    gap: 20px;
}


/* =========================================================
   PANEL SURFACES
   ========================================================= */

.sf-panel,
.sf-chart-card,
.sf-table-card,
.sf-shell-card {
    position: relative;
    min-width: 0;
    border-radius: 22px;
    overflow: hidden;
    background:
        linear-gradient(180deg, rgba(13, 22, 39, 0.94), rgba(9, 16, 30, 0.92));
    border: 1px solid rgba(148, 163, 184, 0.12);
    box-shadow:
        0 16px 34px rgba(2, 6, 23, 0.24),
        inset 0 1px 0 rgba(255,255,255,0.04);
    transition:
        transform 180ms ease,
        border-color 180ms ease,
        box-shadow 180ms ease,
        background 180ms ease;
}

.sf-panel::before,
.sf-chart-card::before,
.sf-table-card::before,
.sf-shell-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.05), transparent 26%);
    opacity: 1;
}

.sf-panel:hover,
.sf-chart-card:hover,
.sf-table-card:hover,
.sf-shell-card:hover {
    transform: translateY(-2px);
    border-color: rgba(96, 165, 250, 0.18);
    box-shadow:
        0 20px 40px rgba(2, 6, 23, 0.28),
        inset 0 1px 0 rgba(255,255,255,0.04);
}

.sf-shell-platform .sf-panel:hover,
.sf-shell-platform .sf-chart-card:hover,
.sf-shell-platform .sf-table-card:hover,
.sf-shell-platform .sf-shell-card:hover {
    box-shadow:
        0 20px 40px rgba(2, 6, 23, 0.28),
        0 0 18px rgba(14, 165, 233, 0.06),
        inset 0 1px 0 rgba(255,255,255,0.04);
}

.sf-panel-head,
.sf-chart-card-head,
.sf-table-head,
.sf-shell-card-head {
    position: relative;
    z-index: 1;
    padding: 18px 20px 14px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.sf-panel-body,
.sf-chart-card-body,
.sf-shell-card-body {
    position: relative;
    z-index: 1;
    padding: 18px 20px 20px;
}

.sf-panel-body-tight {
    padding: 14px 16px 16px;
}

.sf-panel-body-xl {
    padding: 22px 24px 24px;
}


/* =========================================================
   PANEL HEAD CONTENT
   ========================================================= */

.sf-panel-kicker,
.sf-card-kicker,
.sf-chart-kicker {
    margin: 0 0 6px;
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.10em;
    text-transform: uppercase;
    color: var(--sf-text-soft);
}

.sf-panel-title,
.sf-card-title,
.sf-chart-title {
    margin: 0;
    font-size: 1.06rem;
    line-height: 1.2;
    font-weight: 800;
    color: #f8fafc;
}

.sf-panel-subtitle,
.sf-card-subtitle,
.sf-chart-subtitle {
    margin-top: 6px;
    font-size: 0.90rem;
    line-height: 1.45;
    color: var(--sf-text-soft);
}

.sf-panel-head-row,
.sf-chart-head-row,
.sf-section-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 14px;
}

.sf-section-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}


/* =========================================================
   KPI CARDS
   ========================================================= */

.sf-kpi-card {
    position: relative;
    min-width: 0;
    border-radius: 20px;
    overflow: hidden;
    background:
        linear-gradient(145deg, rgba(12, 18, 30, 0.96), rgba(8, 14, 24, 0.96));
    border: 1px solid rgba(148, 163, 184, 0.12);
    box-shadow:
        0 14px 30px rgba(2, 6, 23, 0.22),
        inset 0 1px 0 rgba(255,255,255,0.04);
    transition:
        transform 180ms ease,
        border-color 180ms ease,
        box-shadow 180ms ease;
}

.sf-kpi-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.14), transparent 58%);
    opacity: 0.9;
}

.sf-kpi-card::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 2px;
    background: linear-gradient(90deg, rgba(255,255,255,0), rgba(255,255,255,0.18), rgba(255,255,255,0));
    opacity: 0.35;
}

.sf-kpi-card:hover {
    transform: translateY(-3px);
    border-color: rgba(96, 165, 250, 0.18);
    box-shadow:
        0 18px 36px rgba(2, 6, 23, 0.28),
        0 0 20px rgba(56, 189, 248, 0.08),
        inset 0 1px 0 rgba(255,255,255,0.04);
}

.sf-kpi-body {
    position: relative;
    z-index: 1;
    padding: 18px 18px 18px;
}

.sf-kpi-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
}

.sf-kpi-label {
    font-size: 0.74rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.10em;
    color: var(--sf-text-soft);
    margin-bottom: 10px;
}

.sf-kpi-value {
    font-size: clamp(1.8rem, 2.2vw, 2.5rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.03em;
    color: #f8fafc;
}

.sf-kpi-sub {
    margin-top: 10px;
    font-size: 0.89rem;
    line-height: 1.45;
    color: var(--sf-text-soft);
}

.sf-kpi-meta {
    margin-top: 12px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.sf-kpi-pill {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 4px 9px;
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(148, 163, 184, 0.14);
    color: rgba(226, 232, 240, 0.92);
}

.sf-kpi-icon {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(148, 163, 184, 0.12);
    color: #e2e8f0;
}

.sf-kpi-blue {
    border-color: rgba(59, 130, 246, 0.16);
    box-shadow:
        inset 0 0 0 1px rgba(37, 99, 235, 0.04),
        0 14px 30px rgba(2, 6, 23, 0.22),
        0 0 18px rgba(37, 99, 235, 0.08);
}

.sf-kpi-blue::before {
    background:
        radial-gradient(circle at top left, rgba(59, 130, 246, 0.18), transparent 58%);
}

.sf-kpi-green {
    border-color: rgba(34, 197, 94, 0.16);
    box-shadow:
        inset 0 0 0 1px rgba(34, 197, 94, 0.04),
        0 14px 30px rgba(2, 6, 23, 0.22),
        0 0 18px rgba(34, 197, 94, 0.08);
}

.sf-kpi-green::before {
    background:
        radial-gradient(circle at top left, rgba(34, 197, 94, 0.18), transparent 58%);
}

.sf-kpi-amber {
    border-color: rgba(245, 158, 11, 0.18);
    box-shadow:
        inset 0 0 0 1px rgba(245, 158, 11, 0.04),
        0 14px 30px rgba(2, 6, 23, 0.22),
        0 0 18px rgba(245, 158, 11, 0.08);
}

.sf-kpi-amber::before {
    background:
        radial-gradient(circle at top left, rgba(245, 158, 11, 0.18), transparent 58%);
}

.sf-kpi-red {
    border-color: rgba(239, 68, 68, 0.18);
    box-shadow:
        inset 0 0 0 1px rgba(239, 68, 68, 0.04),
        0 14px 30px rgba(2, 6, 23, 0.22),
        0 0 18px rgba(239, 68, 68, 0.08);
}

.sf-kpi-red::before {
    background:
        radial-gradient(circle at top left, rgba(239, 68, 68, 0.18), transparent 58%);
}


/* =========================================================
   STATUS / BADGE / PILLS
   ========================================================= */

.sf-status-pill,
.sf-badge,
.sf-metric-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 26px;
    padding: 5px 10px;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    white-space: nowrap;
    border: 1px solid rgba(148, 163, 184, 0.14);
}

.sf-status-critical,
.sf-badge-danger {
    background: rgba(239, 68, 68, 0.14);
    color: #fecaca;
    border-color: rgba(239, 68, 68, 0.16);
}

.sf-status-warning,
.sf-badge-warning {
    background: rgba(245, 158, 11, 0.16);
    color: #fde68a;
    border-color: rgba(245, 158, 11, 0.18);
}

.sf-status-info,
.sf-badge-info {
    background: rgba(56, 189, 248, 0.14);
    color: #bae6fd;
    border-color: rgba(56, 189, 248, 0.16);
}

.sf-status-success,
.sf-badge-success,
.sf-badge-active {
    background: rgba(34, 197, 94, 0.14);
    color: #bbf7d0;
    border-color: rgba(34, 197, 94, 0.16);
}

.sf-status-neutral,
.sf-badge-neutral {
    background: rgba(148, 163, 184, 0.12);
    color: #e2e8f0;
    border-color: rgba(148, 163, 184, 0.16);
}


/* =========================================================
   INLINE STATS / METRIC ROWS
   ========================================================= */

.sf-inline-stat {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.sf-metric-note {
    font-size: 0.88rem;
    color: var(--sf-text-soft);
}

.sf-stat-stack {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sf-stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    border-radius: 14px;
    padding: 12px 14px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(148, 163, 184, 0.08);
}

.sf-stat-label {
    color: var(--sf-text-soft);
    font-size: 0.90rem;
}

.sf-stat-value {
    font-weight: 800;
    color: #f8fafc;
}


/* =========================================================
   LISTS / ACTION ITEMS / RAIL CONTENT
   ========================================================= */

.sf-list-stack,
.sf-action-list,
.sf-risk-stack,
.sf-exec-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sf-list-item,
.sf-action-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 16px;
    border-radius: 16px;
    text-decoration: none;
    color: inherit;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(148, 163, 184, 0.08);
    transition:
        transform 160ms ease,
        border-color 160ms ease,
        background 160ms ease,
        box-shadow 160ms ease;
}

.sf-list-item:hover,
.sf-action-item:hover {
    transform: translateY(-1px);
    border-color: rgba(96, 165, 250, 0.18);
    background: rgba(255,255,255,0.045);
    box-shadow: 0 12px 22px rgba(2, 6, 23, 0.14);
}

.sf-list-item-title,
.sf-action-title {
    font-weight: 800;
    color: #f8fafc;
}

.sf-list-item-sub,
.sf-action-sub {
    margin-top: 3px;
    font-size: 0.86rem;
    line-height: 1.45;
    color: var(--sf-text-soft);
}

.sf-list-item-right,
.sf-action-right {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.sf-risk-row,
.sf-exec-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.sf-risk-row:last-child,
.sf-exec-line:last-child {
    border-bottom: none;
}

.sf-risk-left {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #e2e8f0;
}

.sf-risk-right,
.sf-exec-line strong {
    color: #fff;
    font-weight: 700;
}

.sf-risk-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    display: inline-block;
}

.sf-risk-dot-red { background: #ef4444; }
.sf-risk-dot-amber { background: #f59e0b; }
.sf-risk-dot-green { background: #22c55e; }


/* =========================================================
   TABLE SYSTEM
   ========================================================= */

.sf-table-wrap {
    width: 100%;
    overflow-x: auto;
    position: relative;
    z-index: 1;
}

.sf-table-wrap::-webkit-scrollbar {
    height: 10px;
}

.sf-table-wrap::-webkit-scrollbar-track {
    background: transparent;
}

.sf-table-wrap::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.18);
    border-radius: 999px;
}

.sf-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 10px;
    color: var(--sf-text);
    margin: 0;
}

.sf-table thead th {
    padding: 0 14px 8px;
    font-size: 0.76rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--sf-text-soft);
    font-weight: 800;
    white-space: nowrap;
}

.sf-table tbody td {
    padding: 14px;
    vertical-align: middle;
    color: var(--sf-text);
    background: rgba(255, 255, 255, 0.025);
    border-top: 1px solid rgba(148, 163, 184, 0.08);
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.sf-table tbody tr {
    transition: transform 140ms ease;
}

.sf-table tbody tr:hover {
    transform: translateY(-1px);
}

.sf-table tbody tr:hover td {
    background: rgba(255,255,255,0.04);
}

.sf-table tbody td:first-child {
    border-left: 1px solid rgba(148, 163, 184, 0.08);
    border-top-left-radius: 14px;
    border-bottom-left-radius: 14px;
}

.sf-table tbody td:last-child {
    border-right: 1px solid rgba(148, 163, 184, 0.08);
    border-top-right-radius: 14px;
    border-bottom-right-radius: 14px;
}

.sf-table-unit {
    font-weight: 800;
    color: #f8fafc;
}

.sf-table-vehicle-sub,
.sf-table-sub {
    margin-top: 3px;
    font-size: 0.84rem;
    color: var(--sf-text-soft);
}

.sf-table-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}


/* =========================================================
   EMPTY STATES
   ========================================================= */

.sf-empty {
    border-radius: 16px;
    padding: 16px;
    background: rgba(255,255,255,0.025);
    border: 1px dashed rgba(148, 163, 184, 0.14);
    color: var(--sf-text-soft);
    line-height: 1.5;
}

.sf-empty-title {
    font-weight: 800;
    color: #f8fafc;
    margin-bottom: 4px;
}

.sf-empty-sub {
    font-size: 0.90rem;
    color: var(--sf-text-soft);
}


/* =========================================================
   CHART WRAPPER COMPONENTS
   ========================================================= */

.sf-chart-box {
    min-height: 260px;
    position: relative;
}

.sf-chart-box canvas {
    width: 100% !important;
    height: 220px !important;
}

.sf-chart-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.sf-chart-legend-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--sf-text-soft);
}

.sf-chart-legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    display: inline-block;
}


/* =========================================================
   RING / PROGRESS WIDGETS
   ========================================================= */

.sf-ring-widget {
    width: 148px;
    height: 148px;
    margin: 6px auto 0;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at center, rgba(10, 18, 39, 0.96) 52%, transparent 53%),
        conic-gradient(var(--sf-green) 0 82%, rgba(255,255,255,0.08) 82% 100%);
    box-shadow: 0 0 28px rgba(34, 197, 94, 0.14);
}

.sf-ring-widget span {
    font-size: 1.9rem;
    font-weight: 800;
    color: #f8fafc;
}

.sf-progress-row {
    height: 8px;
    border-radius: 999px;
    background: rgba(255,255,255,0.08);
    overflow: hidden;
}

.sf-progress-bar {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--sf-cyan), var(--sf-blue));
    box-shadow: 0 0 18px rgba(56, 189, 248, 0.24);
}


/* =========================================================
   ALERT BAR WIDGETS
   ========================================================= */

.sf-alert-bar {
    width: 14px;
    height: 58px;
    border-radius: 999px;
    flex: 0 0 auto;
    opacity: 0.92;
}

.sf-alert-bar-warning {
    background: linear-gradient(180deg, rgba(245, 158, 11, 0.82), rgba(245, 158, 11, 0.16));
}

.sf-alert-bar-danger {
    background: linear-gradient(180deg, rgba(239, 68, 68, 0.82), rgba(239, 68, 68, 0.16));
}

.sf-alert-bar-info {
    background: linear-gradient(180deg, rgba(56, 189, 248, 0.82), rgba(56, 189, 248, 0.16));
}

.sf-alert-bar-success {
    background: linear-gradient(180deg, rgba(34, 197, 94, 0.82), rgba(34, 197, 94, 0.16));
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 1400px) {
    .sf-grid-kpi {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .sf-grid-3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1180px) {
    .sf-grid-main,
    .sf-grid-2 {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 820px) {
    .sf-grid-kpi,
    .sf-grid-2,
    .sf-grid-3 {
        grid-template-columns: 1fr;
    }

    .sf-panel-head-row,
    .sf-chart-head-row,
    .sf-section-head {
        flex-direction: column;
        align-items: stretch;
    }

    .sf-list-item,
    .sf-action-item,
    .sf-stat-row,
    .sf-risk-row,
    .sf-exec-line {
        flex-direction: column;
        align-items: flex-start;
    }

    .sf-list-item-right,
    .sf-action-right {
        width: 100%;
        justify-content: flex-start;
    }
}