/* ═══════════════════════════════════════════════════════════
   CarbonLCA — Tech Mahindra brand theme
   Primary: #E31837  |  Ink: #4D4D4F  |  Cream: #F6F2EA
   Font: Poppins
   ═══════════════════════════════════════════════════════════ */

:root {
  --red: #E31837;
  --red-dark: #B8122E;
  --red-soft: rgba(227, 24, 55, 0.08);
  --red-border: rgba(227, 24, 55, 0.25);
  --ink: #4D4D4F;
  --ink-soft: #6B6B6E;
  --ink-muted: #9A9A9D;
  --cream: #F6F2EA;
  --cream-dark: #EDE6D9;
  --white: #FFFFFF;
  --bg: #FAFAF8;
  --card: #FFFFFF;
  --border: #E6E2DA;
  --green: #1A7F4B;
  --amber: #C27A0A;
  --blue: #1A5F9E;
  --purple: #6B3FA0;
  --shadow: 0 2px 12px rgba(77, 77, 79, 0.08);
  --shadow-lg: 0 8px 28px rgba(77, 77, 79, 0.12);
  --radius: 10px;
  --radius-sm: 6px;
  --sidebar-w: 248px;
  --font: 'Poppins', 'Segoe UI', system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'Consolas', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { font-size: 15px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  line-height: 1.55;
}

a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dark); text-decoration: underline; }

/* ── Layout ─────────────────────────────────────────────── */
.app { display: flex; min-height: 100vh; }

.sidebar {
  width: var(--sidebar-w);
  background: var(--white);
  border-right: 1px solid var(--border);
  position: fixed; top: 0; left: 0; bottom: 0;
  display: flex; flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 22px 20px 18px;
  border-bottom: 1px solid var(--border);
}
.sidebar-brand .logo {
  font-size: 1.15rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--ink); display: flex; align-items: center; gap: 10px;
}
.sidebar-brand .logo .mark {
  width: 34px; height: 34px; background: var(--red); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem; font-weight: 700; border-radius: 8px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 50% 100%, 0 70%);
}
.sidebar-brand .tagline {
  font-size: 0.68rem; color: var(--ink-muted); letter-spacing: 0.08em;
  text-transform: uppercase; margin-top: 6px;
}

.sidebar-nav { padding: 16px 12px; flex: 1; }
.nav-label {
  font-size: 0.65rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-muted);
  padding: 8px 10px 6px;
}
.nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--ink-soft); font-size: 0.88rem; font-weight: 500;
  margin-bottom: 2px; transition: all 0.15s;
  text-decoration: none; border-left: 3px solid transparent;
}
.nav-link:hover {
  background: var(--cream); color: var(--ink); text-decoration: none;
}
.nav-link.active {
  background: var(--red-soft); color: var(--red);
  border-left-color: var(--red); font-weight: 600;
}
.nav-link .icon { width: 18px; text-align: center; font-size: 0.95rem; }

.sidebar-foot {
  padding: 14px 16px; border-top: 1px solid var(--border);
}
.user-chip {
  display: flex; align-items: center; gap: 10px; margin-bottom: 10px;
}
.user-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--red); color: #fff; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.85rem;
}
.user-meta { font-size: 0.8rem; line-height: 1.3; }
.user-meta .name { font-weight: 600; color: var(--ink); }
.user-meta .role { color: var(--ink-muted); font-size: 0.72rem; }

.main {
  margin-left: var(--sidebar-w);
  flex: 1; min-width: 0;
  display: flex; flex-direction: column;
}

.topbar {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 50;
}
.topbar h1 {
  font-size: 1.25rem; font-weight: 700; color: var(--ink);
  letter-spacing: -0.02em;
}
.topbar h1 span { color: var(--red); }
.topbar-meta { display: flex; gap: 8px; align-items: center; }

.content { padding: 28px 32px 48px; max-width: 1280px; width: 100%; }

/* ── Cards & panels ─────────────────────────────────────── */
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.card-title {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink-muted);
  margin-bottom: 16px; display: flex; align-items: center; gap: 8px;
}
.card-title::before {
  content: ''; width: 3px; height: 14px; background: var(--red);
  border-radius: 2px;
}

/* ── Stats ──────────────────────────────────────────────── */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px; margin-bottom: 24px;
}
.stat {
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  border-top: 3px solid var(--red);
}
.stat.accent-green { border-top-color: var(--green); }
.stat.accent-blue { border-top-color: var(--blue); }
.stat.accent-amber { border-top-color: var(--amber); }
.stat.accent-purple { border-top-color: var(--purple); }
.stat-value {
  font-family: var(--mono); font-size: 1.65rem; font-weight: 700;
  color: var(--ink); line-height: 1.1;
}
.stat-value .unit { font-size: 0.75rem; font-weight: 500; color: var(--ink-muted); margin-left: 4px; }
.stat-label {
  font-size: 0.75rem; color: var(--ink-muted); margin-top: 4px;
  text-transform: uppercase; letter-spacing: 0.06em;
}

/* ── Tables ─────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
thead th {
  background: var(--cream); padding: 11px 14px; text-align: left;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-soft);
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
tbody td {
  padding: 11px 14px; border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--cream); }
td.num, th.num { text-align: right; font-family: var(--mono); font-size: 0.82rem; }
td.mono { font-family: var(--mono); font-size: 0.8rem; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 9px 18px; border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 0.85rem; font-weight: 600;
  border: none; cursor: pointer; transition: all 0.15s;
  text-decoration: none; line-height: 1.3;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--red); color: #fff; }
.btn-primary:hover { background: var(--red-dark); color: #fff; }
.btn-secondary { background: var(--cream); color: var(--ink); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--cream-dark); color: var(--ink); }
.btn-success { background: var(--green); color: #fff; }
.btn-sm { padding: 5px 12px; font-size: 0.78rem; }
.btn-block { width: 100%; justify-content: center; }

/* ── Forms ──────────────────────────────────────────────── */
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 14px; margin-bottom: 14px; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--ink-muted);
}
.form-control {
  padding: 9px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 0.88rem; color: var(--ink);
  background: var(--white); transition: border 0.15s;
}
.form-control:focus { outline: none; border-color: var(--red); box-shadow: 0 0 0 3px var(--red-soft); }
select.form-control { cursor: pointer; }
textarea.form-control { min-height: 100px; resize: vertical; }

/* ── Badges ─────────────────────────────────────────────── */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 20px;
  font-size: 0.7rem; font-weight: 600; letter-spacing: 0.03em;
}
.badge-red { background: var(--red-soft); color: var(--red); }
.badge-green { background: rgba(26, 127, 75, 0.1); color: var(--green); }
.badge-amber { background: rgba(194, 122, 10, 0.12); color: var(--amber); }
.badge-blue { background: rgba(26, 95, 158, 0.1); color: var(--blue); }
.badge-gray { background: var(--cream); color: var(--ink-muted); }

/* ── Login ──────────────────────────────────────────────── */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--cream) 0%, var(--white) 50%, var(--cream-dark) 100%);
  padding: 24px;
}
.login-card {
  background: var(--white); border-radius: 14px; padding: 40px;
  width: 100%; max-width: 400px; box-shadow: var(--shadow-lg);
  border-top: 4px solid var(--red);
}
.login-card .logo {
  display: flex; align-items: center; gap: 12px; margin-bottom: 8px;
}
.login-card .logo .mark {
  width: 42px; height: 42px; background: var(--red); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 700; border-radius: 10px;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 50% 100%, 0 70%);
}
.login-card h2 { font-size: 1.35rem; font-weight: 700; color: var(--ink); }
.login-card .sub { color: var(--ink-muted); font-size: 0.85rem; margin-bottom: 28px; }
.demo-hint {
  margin-top: 18px; padding: 12px; background: var(--cream);
  border-radius: var(--radius-sm); font-size: 0.78rem; color: var(--ink-soft);
}
.demo-hint code {
  background: var(--white); padding: 1px 6px; border-radius: 3px;
  font-family: var(--mono); font-size: 0.75rem;
}

/* ── Progress bars ──────────────────────────────────────── */
.bar-row {
  display: grid; grid-template-columns: 140px 1fr 90px;
  align-items: center; gap: 12px; margin-bottom: 10px;
}
.bar-label { font-size: 0.82rem; font-weight: 500; }
.bar-track {
  background: var(--cream); height: 26px; border-radius: 4px;
  overflow: hidden; border: 1px solid var(--border);
}
.bar-fill {
  height: 100%; display: flex; align-items: center; padding-left: 10px;
  font-family: var(--mono); font-size: 0.72rem; color: #fff; font-weight: 600;
  min-width: 2px; transition: width 0.6s ease;
}
.bar-val {
  font-family: var(--mono); font-size: 0.82rem; font-weight: 600;
  text-align: right; color: var(--ink);
}

/* ── Target trajectory ──────────────────────────────────── */
.stage-strip {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px;
  margin: 16px 0;
}
.stage-card {
  padding: 12px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  text-align: center;
}
.stage-card .label { font-size: 0.7rem; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; }
.stage-card .cf { font-family: var(--mono); font-size: 1.15rem; font-weight: 700; margin: 4px 0; }
.stage-card .red { font-family: var(--mono); font-size: 0.75rem; color: var(--green); font-weight: 600; }

/* ── Impact heatmap cells ───────────────────────────────── */
.heat-critical { background: rgba(227, 24, 55, 0.15); color: var(--red); }
.heat-high     { background: rgba(194, 122, 10, 0.15); color: var(--amber); }
.heat-medium   { background: rgba(26, 95, 158, 0.1);  color: var(--blue); }
.heat-low      { background: rgba(26, 127, 75, 0.1);  color: var(--green); }

/* ── Workflow ───────────────────────────────────────────── */
.wf-item {
  display: flex; gap: 16px; padding: 16px; border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 12px; background: var(--white);
  border-left: 4px solid var(--amber);
}
.wf-item.approved { border-left-color: var(--green); }
.wf-item.rejected { border-left-color: var(--red); }
.wf-item.inprogress { border-left-color: var(--blue); }

/* ── Alerts ─────────────────────────────────────────────── */
.alert {
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px;
  font-size: 0.88rem;
}
.alert-success { background: rgba(26, 127, 75, 0.1); color: var(--green); border: 1px solid rgba(26, 127, 75, 0.2); }
.alert-error { background: var(--red-soft); color: var(--red); border: 1px solid var(--red-border); }
.alert-info { background: rgba(26, 95, 158, 0.08); color: var(--blue); border: 1px solid rgba(26, 95, 158, 0.2); }

/* ── Sub-system color accents ───────────────────────────── */
.ss-power { border-left: 4px solid var(--red); }
.ss-control { border-left: 4px solid var(--blue); }
.ss-enclosure { border-left: 4px solid var(--amber); }
.ss-cables { border-left: 4px solid var(--green); }

/* ── Layout helpers ─────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.text-muted { color: var(--ink-muted); }
.text-right { text-align: right; }
.fw-600 { font-weight: 600; }
.mono { font-family: var(--mono); }

/* ── Responsive ─────────────────────────────────────────── */
.hamburger {
  display: none; position: fixed; top: 10px; left: 10px; z-index: 200;
  width: 42px; height: 42px; border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: var(--white); color: var(--ink);
  font-size: 1.2rem; cursor: pointer; box-shadow: var(--shadow);
}
.sidebar-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0, 0, 0, 0.4); z-index: 90;
}
.sidebar-overlay.active { display: block; }

@media (max-width: 900px) {
  .hamburger { display: block; }
  .sidebar { transform: translateX(-100%); transition: transform 0.2s ease; z-index: 150; box-shadow: var(--shadow-lg); }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .topbar { padding: 12px 16px 12px 62px; }
  .topbar h1 { font-size: 1.05rem; }
  .topbar-meta { display: none; }
  .content { padding: 16px; }
  .card { padding: 16px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stage-strip { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-value { font-size: 1.3rem; }
  .form-row { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 100px 1fr 56px; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .stage-strip { grid-template-columns: 1fr; }
}

@media print {
  .sidebar, .topbar, .btn { display: none !important; }
  .main { margin-left: 0; }
}

/* ── Phase 2: revision diff + details ───────────────────── */
tr.diff-added td { background: rgba(26, 127, 75, 0.06); }
tr.diff-removed td { background: rgba(227, 24, 55, 0.06); }
tr.diff-changed td { background: rgba(194, 122, 10, 0.06); }
details summary { cursor: pointer; padding: 6px 0; }