/* VİTAS — modern dark theme */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg-deep: #0b0f14;
  --bg-base: #111827;
  --bg-elevated: #1a2332;
  --bg-card: #162032;
  --bg-input: #0f172a;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(56, 189, 248, 0.35);
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-2: #22d3ee;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --radius: 14px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font: "DM Sans", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(56, 189, 248, 0.12), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(34, 211, 238, 0.08), transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-base) 40%, #0a1018 100%);
  background-attachment: fixed;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-2);
}

/* Navbar */
.navbar.vk-nav {
  background: rgba(11, 15, 20, 0.82) !important;
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 1.25rem;
}

.navbar.vk-nav .navbar-brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text) !important;
}

.navbar.vk-nav .navbar-brand img {
  width: 72px !important;
  height: auto !important;
  margin-right: 0.5rem;
  filter: drop-shadow(0 4px 12px rgba(56, 189, 248, 0.25));
}

.navbar.vk-nav .nav-link {
  color: var(--text-muted) !important;
  font-weight: 500;
  padding: 0.5rem 0.9rem !important;
  border-radius: 8px;
}

.navbar.vk-nav .nav-link:hover {
  color: var(--text) !important;
  background: var(--accent-soft);
}

.navbar.vk-nav .dropdown-menu {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.navbar.vk-nav .dropdown-item {
  color: var(--text);
}

.navbar.vk-nav .dropdown-item:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

/* Hero / jumbotron */
.jumbotron,
.vk-hero {
  background: transparent !important;
  border-bottom: 1px solid var(--border);
  padding: 2rem 1.5rem 1.75rem !important;
  margin-bottom: 1.5rem;
}

body.pd-hide-hero .jumbotron,
body.pd-hide-hero .vk-hero {
  display: none !important;
}

body.pd-hide-hero {
  overflow: hidden;
}

body.pd-hide-hero footer {
  display: none !important;
}

.jumbotron .display-4,
.vk-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.jumbotron .lead,
.vk-hero .lead {
  color: var(--text-muted);
  max-width: 52rem;
  font-size: 1.05rem;
  margin-bottom: 0;
}

/* Cards — module grid */
.vk-module-grid .card,
.card.vk-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  height: 100%;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.vk-module-grid .card:hover,
.card.vk-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(56, 189, 248, 0.12);
}

.vk-module-grid .card-img-top,
.card.vk-card .card-img-top {
  height: 160px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
  opacity: 0.92;
}

.vk-module-grid .card-body,
.card.vk-card .card-body {
  padding: 1.15rem 1.2rem 1.35rem;
}

.vk-module-grid .card-title,
.card.vk-card .card-title {
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 0.45rem;
}

.vk-module-grid .card-text,
.card.vk-card .card-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.45;
  margin-bottom: 1rem;
}

/* Forms */
.form-control,
.form-select {
  background-color: var(--bg-input) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  border-radius: 10px !important;
  padding: 0.65rem 0.9rem;
}

.form-control:focus,
.form-select:focus {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent-soft) !important;
}

.form-control::placeholder {
  color: #64748b;
}

.form-select option {
  background: var(--bg-elevated);
  color: var(--text);
}

label,
.form-label,
p.fs-4 {
  color: var(--text) !important;
  font-size: 0.95rem !important;
  font-weight: 600 !important;
  margin-bottom: 0.4rem !important;
}

/* Buttons */
.btn-primary,
.btn.btn-primary {
  background: linear-gradient(135deg, #0ea5e9, #22d3ee) !important;
  border: none !important;
  color: #0b1220 !important;
  font-weight: 650;
  border-radius: 10px !important;
  padding: 0.65rem 1.35rem;
  box-shadow: 0 8px 20px rgba(14, 165, 233, 0.28);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

.btn-primary:hover,
.btn.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(14, 165, 233, 0.38);
  color: #0b1220 !important;
}

.btn-secondary,
.btn.btn-secondary {
  background: var(--bg-elevated) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  border-radius: 10px !important;
}

.btn-outline-accent {
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--accent);
  border-radius: 10px;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
}

.btn-outline-accent:hover {
  background: var(--accent-soft);
  color: var(--accent-2);
}

.btn-pdf {
  background: linear-gradient(135deg, #334155, #1e293b) !important;
  border: 1px solid var(--border) !important;
  color: var(--text) !important;
  border-radius: 10px !important;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
}

.btn-pdf:hover {
  border-color: var(--accent) !important;
  color: var(--accent) !important;
}

/* Tables */
.table {
  color: var(--text);
  --bs-table-bg: transparent;
  --bs-table-striped-bg: rgba(148, 163, 184, 0.06);
  --bs-table-hover-bg: rgba(56, 189, 248, 0.08);
  border-color: var(--border);
}

.table thead th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom-color: var(--border) !important;
}

.table td,
.table th {
  border-color: var(--border);
  vertical-align: middle;
}

.table-striped > tbody > tr:nth-of-type(odd) > * {
  color: var(--text);
}

/* Alerts */
.alert {
  border-radius: 12px;
  border: 1px solid var(--border);
}

.alert-success {
  background: rgba(52, 211, 153, 0.12);
  color: var(--success);
  border-color: rgba(52, 211, 153, 0.3);
}

.alert-danger {
  background: rgba(248, 113, 113, 0.12);
  color: var(--danger);
  border-color: rgba(248, 113, 113, 0.3);
}

.alert-info {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--border-strong);
}

/* Pagination */
.pagination .page-link {
  background: var(--bg-card);
  border-color: var(--border);
  color: var(--text-muted);
}

.pagination .page-link:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--border-strong);
}

.pagination .page-item.active .page-link {
  background: var(--accent);
  border-color: var(--accent);
  color: #0b1220;
}

/* Offcanvas */
.offcanvas.text-bg-dark {
  background: var(--bg-elevated) !important;
  border-right: 1px solid var(--border);
}

/* Calculator page shell */
.vk-page {
  max-width: 1180px;
  margin: 0 auto 3rem;
  padding: 0 1.25rem;
}

.vk-page-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.vk-page-header h1 {
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}

.vk-page-header p {
  color: var(--text-muted);
  margin: 0;
  max-width: 40rem;
  font-size: 0.95rem;
}

.vk-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 10px 32px rgba(0, 0, 0, 0.25);
  margin-bottom: 1.5rem;
}

.vk-panel-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 650;
  margin-bottom: 1rem;
}

.vk-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 0.5rem;
}

.vk-result-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 500;
  padding: 0.85rem 1.25rem;
  border-radius: 12px;
  background: rgba(52, 211, 153, 0.1);
  border: 1px solid rgba(52, 211, 153, 0.28);
  color: var(--success);
}

.vk-result-badge .label {
  font-family: var(--font);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
}

.status-ok {
  color: var(--success);
  font-weight: 700;
}

.status-fail {
  color: var(--text-muted);
}

/* EN62676 visual cards */
.en-levels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.en-level {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 0.75rem 0.9rem;
  text-align: center;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  position: relative;
  overflow: hidden;
}

.en-level.active {
  border-color: var(--success);
  box-shadow: 0 0 0 1px rgba(52, 211, 153, 0.25), 0 8px 24px rgba(52, 211, 153, 0.12);
  transform: translateY(-2px);
}

.en-level.active::after {
  content: "OK";
  position: absolute;
  top: 8px;
  right: 8px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--success);
  background: rgba(52, 211, 153, 0.15);
  padding: 2px 6px;
  border-radius: 4px;
}

.en-level.inactive {
  opacity: 0.45;
}

.en-level .en-svg {
  width: 72px;
  height: 96px;
  margin: 0 auto 0.65rem;
  display: block;
}

.en-level .en-name {
  font-size: 0.85rem;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 0.15rem;
}

.en-level .en-ppm {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
}

.en-level .en-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
  line-height: 1.3;
}

/* DRI range visuals */
.dri-visuals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.dri-card {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.9), rgba(22, 32, 50, 0.95));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.15rem;
  position: relative;
  overflow: hidden;
}

.dri-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.08), transparent 55%);
  pointer-events: none;
}

.dri-card .dri-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 650;
  margin-bottom: 0.35rem;
}

.dri-card .dri-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.dri-card.detection .dri-title { color: #7dd3fc; }
.dri-card.recognition .dri-title { color: #67e8f9; }
.dri-card.identification .dri-title { color: #34d399; }

.dri-card .dri-range {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 500;
  margin: 0.5rem 0 0.75rem;
}

.dri-card .dri-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 0.85rem;
}

.dri-illust {
  width: 100%;
  height: 110px;
  border-radius: 10px;
  background: #0a0f18;
  border: 1px solid var(--border);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0.5rem;
  position: relative;
}

.dri-illust svg {
  max-height: 95px;
  width: auto;
}

.dri-scale {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg-input);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.dri-scale-bar {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, #0ea5e9 0%, #22d3ee 40%, #34d399 100%);
  margin: 1.75rem 1rem 2.5rem;
}

.dri-scale-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--bg-deep);
  box-shadow: 0 0 0 2px currentColor;
}

.dri-scale-marker span {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 0.7rem;
  font-family: var(--mono);
  color: var(--text-muted);
}

.dri-scale-marker.d { color: #7dd3fc; left: 18%; }
.dri-scale-marker.r { color: #67e8f9; left: 48%; }
.dri-scale-marker.i { color: #34d399; left: 82%; }

/* Legend strip */
.vk-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.vk-legend span::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: middle;
}

.vk-legend .lg-ok::before { background: var(--success); }
.vk-legend .lg-no::before { background: #475569; }

/* Footer override */
footer.text-white {
  background: #080c12 !important;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
}

footer a.text-white {
  color: var(--text-muted) !important;
}

footer a.text-white:hover {
  color: var(--accent) !important;
}

footer h5 {
  color: var(--text) !important;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

/* Persist toast */
.vk-toast {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: 1080;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 0.65rem 1rem;
  border-radius: 10px;
  font-size: 0.8rem;
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  pointer-events: none;
}

.vk-toast.show {
  opacity: 1;
  transform: translateY(0);
}

/* PDF print helpers */
@media print {
  body {
    background: #fff !important;
    color: #111 !important;
  }
  .navbar,
  .vk-actions,
  .btn-pdf,
  footer {
    display: none !important;
  }
}

/* Narrow containers that were hardcoded */
.container-fluid[style*="width: 750px"],
.container-fluid[style*="width:500px"] {
  width: 100% !important;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.row.g-vk > [class*="col-"] {
  margin-bottom: 1rem;
}