/* ==========================================================
   Predictive Maintenance — Light Editorial Theme
   One accent (emerald), serif+sans pairing, flat surfaces.
   ========================================================== */

:root {
    --bg:        #fafaf9;          /* Slightly warm off-white */
    --bg-raised: #ffffff;
    --bg-input:  #f5f5f4;
    --border:    #e7e5e4;

    --fg:        #1c1917;          /* Deep charcoal */
    --fg-2:      #44403c;
    --fg-3:      #78716c;

    --accent:    #059669;          /* Emerald green */
    --warn:      #d97706;          /* Muted amber */
    --danger:    #dc2626;          /* Muted red */
    --ok:        #059669;          /* Same as accent */

    --serif:     'Cormorant Garamond', 'Georgia', serif;
    --sans:      'DM Sans', -apple-system, 'Segoe UI', sans-serif;
    --mono:      'DM Mono', 'Menlo', monospace;

    --sidebar-w: 220px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; }
body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--fg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ---- Loader ---- */
.loader-overlay {
    position: fixed; inset: 0;
    background: var(--bg);
    display: flex; align-items: center; justify-content: center;
    z-index: 9999;
    transition: opacity .4s ease;
}
.loader-overlay.hidden { opacity: 0; pointer-events: none; }
.loader-bar {
    width: 40px; height: 2px;
    background: var(--accent);
    animation: loadPulse 1s ease-in-out infinite;
}
@keyframes loadPulse {
    0%,100% { opacity: .2; }
    50%     { opacity: 1; }
}

/* ---- Shell ---- */
.shell { display: flex; min-height: 100vh; }

/* ---- Sidebar ---- */
.sidebar {
    width: var(--sidebar-w);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100;
    background: var(--bg);
}
.sidebar-head {
    padding: 32px 24px 24px;
}
.logotype {
    font-family: var(--serif);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--fg);
}
.logotype em {
    font-style: italic;
    color: var(--accent);
}

.sidebar-nav { flex: 1; padding: 16px 16px; overflow-y: auto; }
.nav-group-label {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    color: var(--fg-3);
    padding: 16px 8px 6px;
}
.nav-link {
    display: block;
    padding: 6px 8px;
    font-size: .9rem;
    font-weight: 400;
    color: var(--fg-2);
    text-decoration: none;
    border-radius: 2px;
    transition: color .15s, background .15s;
}
.nav-link:hover { color: var(--fg); }
.nav-link.active {
    color: var(--accent);
    font-weight: 500;
    background: rgba(5, 150, 105, 0.05); /* very faint emerald tint */
}

.sidebar-foot {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex; align-items: center; gap: 8px;
    font-size: .8rem;
    color: var(--ok);
}
.pulse-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--ok);
    animation: blink 2.5s ease-in-out infinite;
}
.pulse-dot--sm { width: 5px; height: 5px; }
@keyframes blink {
    0%,100% { opacity: 1; }
    50%     { opacity: .4; }
}

/* ---- Main ---- */
.main {
    flex: 1;
    margin-left: var(--sidebar-w);
    padding: 40px 48px;
    max-width: 1200px;
}

/* ---- Views ---- */
.view { display: none; }
.view.active { display: block; animation: fadeUp .25s ease; }
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---- View header ---- */
.view-head {
    display: flex; justify-content: space-between; align-items: flex-start;
    margin-bottom: 40px;
    flex-wrap: wrap; gap: 16px;
}
.view-title {
    font-family: var(--serif);
    font-size: 2rem;
    font-weight: 500;
    color: var(--fg);
    line-height: 1.1;
}
.view-sub {
    color: var(--fg-3);
    font-size: .9rem;
    margin-top: 6px;
}
.head-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 18px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    color: var(--fg);
    font-family: var(--sans);
    font-size: .85rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: 2px;
    transition: all .15s;
}
.btn:hover { border-color: var(--fg-3); }
.btn--accent {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.btn--accent:hover { 
    background: #047857; /* slightly darker emerald */
    border-color: #047857; 
}
.btn--full { width: 100%; justify-content: center; margin-top: 16px; }
.btn--sm { padding: 4px 12px; font-size: .8rem; }
.btn:disabled { opacity: .4; cursor: default; }

/* ---- Select ---- */
.sel {
    padding: 7px 12px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--fg);
    font-family: var(--sans);
    font-size: .85rem;
    cursor: pointer;
    outline: none;
}
.sel:focus { border-color: var(--accent); }

/* ---- Stat strip ---- */
.stat-strip {
    display: flex;
    align-items: baseline;
    gap: 0;
    padding: 0 0 32px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
}
.stat-item { padding: 0 32px; }
.stat-item:first-child { padding-left: 0; }
.stat-divider {
    width: 1px;
    height: 32px;
    background: var(--border);
    flex-shrink: 0;
    align-self: center;
}
.stat-value {
    display: block;
    font-family: var(--serif);
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--fg);
    line-height: 1;
}
.stat-value--warn { color: var(--warn); }
.stat-value--danger { color: var(--danger); }
.stat-label {
    display: block;
    font-size: .8rem;
    font-weight: 500;
    color: var(--fg-3);
    margin-top: 6px;
}

/* ---- Section block ---- */
.section-block {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 28px;
    margin-bottom: 24px;
}
.section-title {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 500;
    margin-bottom: 20px;
    color: var(--fg);
}

/* ---- Two column ---- */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}
.chart-wrap {
    height: 260px;
    position: relative;
}
.chart-wrap canvas { max-height: 240px; }

/* ---- Pipelines ---- */
.pipeline-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
}
.pipeline-item {
    background: var(--bg-raised);
    padding: 24px;
}
.pipeline-item h3 {
    font-family: var(--serif);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--fg);
}
.pipeline-item p {
    font-size: .85rem;
    color: var(--fg-3);
    line-height: 1.5;
    margin-bottom: 16px;
}
.tag {
    font-size: .7rem;
    font-weight: 500;
    color: var(--fg-2);
    border: 1px solid var(--border);
    padding: 3px 8px;
    border-radius: 2px;
    background: var(--bg);
}

/* ---- Fleet bar ---- */
.fleet-bar-wrap {
    display: flex; align-items: center; gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.fleet-bar-total {
    font-family: var(--serif);
    font-size: 1.8rem;
    font-weight: 500;
}
.fleet-bar-label { font-size: .85rem; color: var(--fg-3); }
.fleet-bar {
    flex: 1; height: 4px;
    background: var(--bg-input);
    border-radius: 2px;
    display: flex; overflow: hidden;
}
.fleet-seg { height: 100%; transition: width .5s ease; }
.fleet-seg--crit { background: var(--danger); }
.fleet-seg--warn { background: var(--warn); }
.fleet-seg--ok   { background: var(--ok); }

/* ---- Machine grid ---- */
.machine-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 2px;
    overflow: hidden;
}
.machine-card {
    background: var(--bg-raised);
    padding: 20px;
    position: relative;
}
.machine-card--critical { background: #fff1f2; /* extremely faint red tint */ }
.mc-head {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 12px;
}
.mc-id {
    font-family: var(--sans);
    font-size: .9rem;
    font-weight: 600;
}
.mc-model {
    font-size: .75rem;
    color: var(--fg-3);
}
.mc-status {
    display: flex; align-items: center; gap: 6px;
    font-size: .75rem; font-weight: 500;
}
.mc-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
}
.mc-dot--ok   { background: var(--ok); }
.mc-dot--warn { background: var(--warn); }
.mc-dot--crit { background: var(--danger); }
.mc-status--ok   { color: var(--ok); }
.mc-status--warn { color: var(--warn); }
.mc-status--crit { color: var(--danger); }

.mc-prob {
    font-size: .8rem;
    color: var(--fg-3);
    margin-bottom: 6px;
}
.mc-prob strong { color: var(--fg); font-weight: 600; }
.mc-rul {
    display: flex; align-items: baseline; gap: 4px;
    margin-bottom: 12px;
}
.mc-rul-val {
    font-family: var(--sans);
    font-size: 1.2rem;
    font-weight: 600;
}
.mc-rul-unit {
    font-size: .75rem;
    color: var(--fg-3);
}
.mc-sensors {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 4px;
    font-size: .7rem;
    color: var(--fg-3);
    font-family: var(--mono);
}

/* ---- Diagnostics layout ---- */
.diag-layout {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 32px;
    align-items: start;
}
.diag-input .section-block { position: sticky; top: 40px; }

/* ---- Fields ---- */
.field { margin-bottom: 16px; }
.field label {
    display: block;
    font-size: .85rem;
    font-weight: 500;
    color: var(--fg-2);
    margin-bottom: 6px;
}
.field-unit {
    font-family: var(--sans);
    font-size: .75rem;
    color: var(--fg-3);
    font-weight: 400;
}
.field input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 2px;
    color: var(--fg);
    font-family: var(--mono);
    font-size: .9rem;
    outline: none;
    transition: border-color .15s;
}
.field input:focus { border-color: var(--accent); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.presets-row {
    display: flex; align-items: center; gap: 8px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.presets-label { font-size: .8rem; color: var(--fg-3); margin-right: 4px; }

/* ---- Results ---- */
.empty-msg {
    text-align: center;
    padding: 64px 20px;
    color: var(--fg-3);
    font-size: .9rem;
}
.empty-detail {
    display: block;
    font-size: .8rem;
    margin-top: 8px;
    color: var(--fg-3);
}

.results-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 24px;
}

.result-card {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 32px;
    text-align: center;
}
.result-card-label {
    font-size: .85rem;
    color: var(--fg-3);
    font-weight: 500;
    display: block;
    margin-bottom: 24px;
}
.gauge-wrap {
    position: relative;
    width: 180px; height: 180px;
    margin: 0 auto 16px;
}
.gauge-center {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
}
.gauge-num {
    font-family: var(--serif);
    font-size: 2.5rem;
    font-weight: 500;
}

.status-indicator {
    font-size: .85rem;
    font-weight: 500;
}
.status-indicator--ok   { color: var(--ok); }
.status-indicator--warn { color: var(--warn); }
.status-indicator--crit { color: var(--danger); }

.rul-display {
    display: flex; align-items: baseline; justify-content: center;
    gap: 6px; margin-bottom: 16px;
}
.rul-num {
    font-family: var(--serif);
    font-size: 3rem;
    font-weight: 500;
    line-height: 1;
}
.rul-unit {
    font-size: .9rem;
    color: var(--fg-3);
}
.rul-bar-track {
    width: 100%; height: 4px;
    background: var(--bg-input);
    margin-bottom: 16px;
    border-radius: 2px;
}
.rul-bar-fill {
    height: 100%;
    border-radius: 2px;
    transition: width .5s ease, background .3s ease;
}
.rul-trend-wrap { height: 70px; }

/* ---- AI Report ---- */
.ai-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 20px;
}
.ai-tag {
    display: flex; align-items: center; gap: 8px;
    font-size: .75rem;
    color: var(--accent);
    font-weight: 600;
}

.prose {
    font-size: .95rem;
    line-height: 1.8;
    color: var(--fg-2);
}
.prose strong { color: var(--fg); font-weight: 600; }
.prose p { margin-bottom: 16px; }
.prose h1, .prose h2, .prose h3, .prose h4, .prose h5 {
    font-family: var(--serif);
    color: var(--fg);
    margin: 24px 0 12px;
    font-weight: 600;
}
.prose ul, .prose ol { padding-left: 24px; margin-bottom: 16px; }
.prose li { margin-bottom: 6px; }
.prose code {
    font-family: var(--mono);
    background: var(--bg-input);
    padding: 2px 6px;
    border-radius: 2px;
    font-size: .85rem;
}

/* ---- Reports layout ---- */
.reports-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 32px;
    align-items: start;
}
.reports-sidebar {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 12px;
    position: sticky; top: 40px;
}
.report-item {
    display: block;
    padding: 10px 14px;
    font-size: .9rem;
    color: var(--fg-2);
    cursor: pointer;
    transition: color .15s, background .15s;
    border-radius: 2px;
}
.report-item:hover { color: var(--fg); background: var(--bg); }
.report-item.active { color: var(--accent); background: rgba(5, 150, 105, 0.05); font-weight: 500; }

.reports-viewer {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    border-radius: 2px;
    padding: 40px;
    min-height: 400px;
}

/* ---- Table ---- */
.table-scroll { overflow-x: auto; }
.tbl {
    width: 100%;
    border-collapse: collapse;
    font-size: .9rem;
}
.tbl th {
    text-align: left;
    padding: 12px 16px;
    font-size: .8rem;
    font-weight: 600;
    color: var(--fg-3);
    border-bottom: 1px solid var(--border);
}
.tbl td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--fg-2);
}
.tbl tbody tr:hover { background: var(--bg); }
.tbl-empty {
    text-align: center;
    padding: 48px 16px !important;
    color: var(--fg-3);
}
.tbl-mono { font-family: var(--mono); }
.tbl-bold { font-weight: 600; color: var(--fg); }

.tbl-status { font-size: .8rem; font-weight: 500; }
.tbl-status--scheduled   { color: var(--fg-3); }
.tbl-status--rescheduled { color: var(--warn); }
.tbl-status--risk        { color: var(--danger); }

.tbl-prio { font-size: .8rem; font-weight: 500; }
.tbl-prio--high   { color: var(--danger); }
.tbl-prio--medium { color: var(--warn); }
.tbl-prio--low    { color: var(--fg-3); }

/* ---- Modal ---- */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(28, 25, 23, 0.4);
    backdrop-filter: blur(2px);
    display: flex; align-items: center; justify-content: center;
    z-index: 1000;
}
.modal {
    background: var(--bg-raised);
    border: 1px solid var(--border);
    width: 90%; max-width: 480px;
    border-radius: 2px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05); /* very subtle true elevation */
}
.modal-head {
    display: flex; justify-content: space-between; align-items: center;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border);
}
.modal-head h3 {
    font-family: var(--serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--fg);
}
.modal-x {
    background: none; border: none;
    color: var(--fg-3); font-size: 1.6rem;
    cursor: pointer; line-height: 1;
}
.modal-x:hover { color: var(--fg); }
.modal-body { padding: 32px; }
.modal-desc {
    font-size: .9rem;
    color: var(--fg-3);
    margin-bottom: 24px;
    line-height: 1.6;
}
.modal-foot {
    display: flex; justify-content: flex-end; gap: 12px;
    padding: 20px 32px;
    border-top: 1px solid var(--border);
    background: var(--bg);
}

/* ---- Toast ---- */
.toast-container {
    position: fixed; bottom: 24px; right: 24px;
    z-index: 2000;
    display: flex; flex-direction: column; gap: 8px;
}
.toast {
    padding: 12px 20px;
    background: var(--bg-raised);
    border: 1px solid var(--border);
    font-size: .85rem;
    color: var(--fg);
    border-radius: 2px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.05);
    animation: slideIn .25s ease;
    max-width: 340px;
}
.toast--success { border-left: 3px solid var(--ok); }
.toast--error   { border-left: 3px solid var(--danger); }
.toast--info    { border-left: 3px solid var(--fg-3); }
@keyframes slideIn {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---- Responsive ---- */
@media (max-width: 1000px) {
    .two-col { grid-template-columns: 1fr; }
    .diag-layout { grid-template-columns: 1fr; }
    .diag-input .section-block { position: static; }
    .results-pair { grid-template-columns: 1fr; }
    .reports-layout { grid-template-columns: 1fr; }
    .pipeline-row { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
    .sidebar { display: none; }
    .main { margin-left: 0; padding: 24px; }
    .stat-strip { flex-wrap: wrap; gap: 12px; }
    .machine-grid { grid-template-columns: 1fr 1fr; }
    .pipeline-row { grid-template-columns: 1fr; }
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #d6d3d1; }