/* ==========================================================================
   Observatori del Lloguer — Badalona 2026
   Modular stylesheet · Bloomberg/FT editorial style
   ========================================================================== */

/* ── Custom properties ─────────────────────────────────────────────────── */
:root {
  --obs-bg:          #0d0d0e;
  --obs-bg-1:        #141416;
  --obs-bg-2:        #1c1c20;
  --obs-bg-card:     #1e1e23;
  --obs-border:      rgba(255,255,255,.08);
  --obs-red:         #a31515;
  --obs-red-bright:  #e03030;
  --obs-accent:      #f5a623;
  --obs-accent2:     #3b9eff;
  --obs-text:        #e8e8ec;
  --obs-text-muted:  #888898;
  --obs-text-faint:  #4a4a5a;
  --obs-font-sans:   'Inter', system-ui, sans-serif;
  --obs-font-serif:  'Georgia', 'Times New Roman', serif;
  --obs-chart-1:     #e03030;
  --obs-chart-2:     #3b9eff;
  --obs-chart-3:     #f5a623;
  --obs-chart-4:     #4ade80;
  --obs-chart-5:     #a78bfa;
}

/* ── Base page wrapper ─────────────────────────────────────────────────── */
.obs-page {
  background: var(--obs-bg);
  color: var(--obs-text);
  font-family: var(--obs-font-sans);
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* ── Hero ──────────────────────────────────────────────────────────────── */
.obs-hero {
  position: relative;
  min-height: 52vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(5rem, 10vw, 7rem) clamp(1.5rem, 5vw, 5rem) clamp(2rem, 4vw, 3rem);
  overflow: hidden;
  background: var(--obs-bg);
}

.obs-hero__bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.obs-hero__bg-glow {
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(ellipse at center, rgba(163,21,21,.22) 0%, transparent 65%);
  pointer-events: none;
}

.obs-hero__eyebrow {
  font-size: .7rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--obs-red-bright);
  font-weight: 600;
  margin: 0 0 1.25rem;
  opacity: 0;
  transform: translateY(12px);
}

.obs-hero__title {
  font-family: var(--obs-font-serif);
  font-size: clamp(2.4rem, 6vw, 5.5rem);
  line-height: 1.05;
  font-weight: 400;
  color: #fff;
  margin: 0 0 1.5rem;
  max-width: 14ch;
  opacity: 0;
  transform: translateY(20px);
}

.obs-hero__title em {
  font-style: italic;
  color: var(--obs-red-bright);
}

.obs-hero__meta {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  opacity: 0;
  transform: translateY(12px);
}

.obs-hero__date {
  font-size: .85rem;
  color: var(--obs-text-muted);
  letter-spacing: .04em;
}

.obs-hero__source {
  font-size: .78rem;
  color: var(--obs-text-faint);
  border-left: 1px solid var(--obs-border);
  padding-left: 2rem;
}

.obs-hero__scroll-hint {
  display: none;
}

.obs-hero__scroll-hint::before {
  content: '';
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--obs-text-faint));
}

/* ── Section base ──────────────────────────────────────────────────────── */
.obs-section {
  padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 5vw, 5rem);
  max-width: 1360px;
  margin: 0 auto;
}

.obs-section--full {
  max-width: none;
  background: var(--obs-bg-1);
  padding: clamp(3rem, 8vw, 6rem) clamp(1.5rem, 5vw, 5rem);
}

.obs-section--dark {
  background: var(--obs-bg-2);
}

.obs-section-inner {
  max-width: 1360px;
  margin: 0 auto;
}

.obs-section__label {
  font-size: .68rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--obs-red-bright);
  font-weight: 700;
  margin: 0 0 .9rem;
  display: block;
}

.obs-section__title {
  font-family: var(--obs-font-serif);
  font-size: clamp(1.65rem, 3vw, 2.6rem);
  line-height: 1.15;
  font-weight: 400;
  color: #fff;
  margin: 0 0 .75rem;
}

.obs-section__sub {
  font-size: clamp(.9rem, 1.2vw, 1.05rem);
  color: var(--obs-text-muted);
  max-width: 60ch;
  line-height: 1.65;
  margin: 0 0 2.5rem;
}

.obs-divider {
  border: none;
  border-top: 1px solid var(--obs-border);
  margin: 0;
}

/* ── KPI Strip ─────────────────────────────────────────────────────────── */
.obs-kpi-strip {
  background: var(--obs-bg-1);
  border-top: 1px solid var(--obs-border);
  border-bottom: 1px solid var(--obs-border);
}

.obs-kpi-strip__inner {
  max-width: 1360px;
  margin: 0 auto;
  padding: 0 clamp(1.5rem, 5vw, 5rem);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.obs-kpi {
  padding: 2.25rem 1.5rem;
  border-right: 1px solid var(--obs-border);
  position: relative;
  overflow: hidden;
}

.obs-kpi:last-child {
  border-right: none;
}

.obs-kpi__value {
  font-family: var(--obs-font-serif);
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 400;
  color: #fff;
  line-height: 1;
  margin: 0 0 .4rem;
  display: block;
}

.obs-kpi__value--red   { color: var(--obs-red-bright); }
.obs-kpi__value--amber { color: var(--obs-accent); }
.obs-kpi__value--blue  { color: var(--obs-accent2); }
.obs-kpi__value--green { color: #4ade80; }

.obs-kpi__label {
  font-size: .78rem;
  color: var(--obs-text-muted);
  line-height: 1.4;
  letter-spacing: .02em;
}

.obs-kpi__trend {
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  font-weight: 600;
  margin-top: .35rem;
  display: flex;
  align-items: center;
  gap: .3rem;
}

.obs-kpi__trend--up   { color: #f87171; }
.obs-kpi__trend--down { color: #4ade80; }

/* ── Chart cards ───────────────────────────────────────────────────────── */
.obs-chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.obs-chart-grid--thirds {
  grid-template-columns: 2fr 1fr;
}

.obs-chart-grid--single {
  grid-template-columns: 1fr;
}

.obs-card {
  background: var(--obs-bg-card);
  border: 1px solid var(--obs-border);
  border-radius: 3px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
}

.obs-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--obs-red);
}

.obs-card--accent::before { background: var(--obs-accent2); }
.obs-card--amber::before  { background: var(--obs-accent); }
.obs-card--green::before  { background: #4ade80; }

.obs-card__title {
  font-size: .92rem;
  font-weight: 600;
  color: var(--obs-text);
  margin: 0 0 .3rem;
  letter-spacing: .01em;
}

.obs-card__sub {
  font-size: .75rem;
  color: var(--obs-text-faint);
  margin: 0 0 1.5rem;
}

.obs-card__source {
  font-size: .67rem;
  color: var(--obs-text-faint);
  margin-top: 1rem;
  border-top: 1px solid var(--obs-border);
  padding-top: .75rem;
  letter-spacing: .03em;
}

/* ── Chart containers ──────────────────────────────────────────────────── */
.obs-chart {
  width: 100%;
  overflow: visible;
}

.obs-chart--h320 { height: 320px; }
.obs-chart--h260 { height: 260px; }
.obs-chart--h220 { height: 220px; }
.obs-chart--h180 { height: 180px; }

/* D3 elements */
.obs-axis text {
  fill: var(--obs-text-faint);
  font-size: 11px;
  font-family: var(--obs-font-sans);
}

.obs-axis path,
.obs-axis line {
  stroke: var(--obs-border);
}

.obs-axis--x path { display: none; }

.obs-gridline {
  stroke: rgba(255,255,255,.04);
  stroke-dasharray: 3 4;
}

.obs-line {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.obs-area {
  opacity: .18;
}

.obs-tooltip {
  position: absolute;
  background: #202028;
  border: 1px solid var(--obs-border);
  border-radius: 3px;
  padding: .6rem .9rem;
  font-size: .78rem;
  color: var(--obs-text);
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s;
  z-index: 100;
  white-space: nowrap;
  backdrop-filter: blur(8px);
}

.obs-tooltip strong {
  display: block;
  font-size: .72rem;
  color: var(--obs-text-muted);
  font-weight: 400;
  margin-bottom: .2rem;
}

/* ── Legend ────────────────────────────────────────────────────────────── */
.obs-legend {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.obs-legend__item {
  display: flex;
  align-items: center;
  gap: .4rem;
  font-size: .75rem;
  color: var(--obs-text-muted);
}

.obs-legend__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.obs-legend__line {
  width: 18px;
  height: 2px;
  border-radius: 1px;
  flex-shrink: 0;
}

/* ── Neighborhood table/bars ───────────────────────────────────────────── */
.obs-barlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .65rem;
}

.obs-barlist__item {
  display: grid;
  grid-template-columns: 130px 1fr 60px;
  align-items: center;
  gap: .75rem;
}

.obs-barlist__name {
  font-size: .8rem;
  color: var(--obs-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.obs-barlist__track {
  background: rgba(255,255,255,.05);
  border-radius: 2px;
  height: 6px;
  overflow: hidden;
}

.obs-barlist__fill {
  height: 100%;
  border-radius: 2px;
  background: var(--obs-red-bright);
  width: 0;
  transition: width 1.2s cubic-bezier(.16, 1, .3, 1);
}

.obs-barlist__value {
  font-size: .8rem;
  color: var(--obs-text);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ── Callout block ─────────────────────────────────────────────────────── */
.obs-callout {
  background: var(--obs-bg-card);
  border: 1px solid var(--obs-border);
  border-left: 3px solid var(--obs-red-bright);
  border-radius: 0 3px 3px 0;
  padding: 2rem 2.5rem;
  position: relative;
  overflow: hidden;
}

.obs-callout--amber { border-left-color: var(--obs-accent); }
.obs-callout--blue  { border-left-color: var(--obs-accent2); }

.obs-callout__headline {
  font-family: var(--obs-font-serif);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 400;
  color: var(--obs-red-bright);
  line-height: 1;
  margin: 0 0 .5rem;
}

.obs-callout--amber .obs-callout__headline { color: var(--obs-accent); }
.obs-callout--blue  .obs-callout__headline { color: var(--obs-accent2); }

.obs-callout__body {
  font-size: 1.05rem;
  color: var(--obs-text);
  line-height: 1.6;
  margin: 0;
  max-width: 50ch;
}

.obs-callout__note {
  margin-top: .75rem;
  font-size: .92rem;
  color: rgba(255,255,255,.75);
  font-weight: 500;
}

/* ── Narrative editorial block ─────────────────────────────────────────── */
.obs-narrative {
  max-width: 660px;
}

.obs-narrative__lead {
  font-family: var(--obs-font-serif);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
  line-height: 1.6;
  color: var(--obs-text);
  margin: 0 0 1.25rem;
}

.obs-narrative__body {
  font-size: .95rem;
  line-height: 1.75;
  color: var(--obs-text-muted);
  margin: 0 0 1rem;
}

/* ── Data table ────────────────────────────────────────────────────────── */
.obs-data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: .82rem;
  font-variant-numeric: tabular-nums;
}

.obs-data-table th {
  color: var(--obs-text-faint);
  font-weight: 600;
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  text-align: left;
  padding: .6rem .75rem;
  border-bottom: 1px solid var(--obs-border);
}

.obs-data-table td {
  padding: .65rem .75rem;
  border-bottom: 1px solid rgba(255,255,255,.03);
  color: var(--obs-text);
}

.obs-data-table tr:hover td { background: rgba(255,255,255,.02); }

.obs-data-table .num    { text-align: right; font-weight: 600; }
.obs-data-table .change-up   { color: #f87171; }
.obs-data-table .change-down { color: #4ade80; }

.obs-data-table--compact th,
.obs-data-table--compact td {
  width: 25%;
}

.obs-hpo-table-wrap {
  overflow-x: auto;
}

.obs-portals-compare {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.obs-portals-compare__item {
  background: rgba(255,255,255,.03);
  border: 1px solid var(--obs-border);
  border-top: 2px solid var(--obs-red-bright);
  border-radius: 3px;
  padding: 1.4rem 1.5rem;
}

.obs-portals-compare__item--blue { border-top-color: var(--obs-accent2); }
.obs-portals-compare__item--amber { border-top-color: var(--obs-accent); }
.obs-portals-compare__item--violet { border-top-color: #b47ff5; }

.obs-portals-compare__value {
  margin: 0 0 .35rem;
  font-family: var(--obs-font-serif);
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1;
  color: #fff;
}

.obs-portals-compare__label {
  margin: 0;
  font-size: .92rem;
  line-height: 1.5;
  color: var(--obs-text-muted);
}

/* ── Portals comparison ────────────────────────────────────────────────── */
.obs-portals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.obs-portal-card {
  background: var(--obs-bg);
  border: 1px solid var(--obs-border);
  border-radius: 3px;
  padding: 1.5rem;
  text-align: center;
}

.obs-portal-card__name {
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--obs-text-faint);
  margin-bottom: .5rem;
}

.obs-portal-card__value {
  font-family: var(--obs-font-serif);
  font-size: 2.2rem;
  color: #fff;
  line-height: 1;
}

.obs-portal-card__suffix {
  font-size: .85rem;
  color: var(--obs-text-muted);
  margin-top: .25rem;
}

/* ── Timeline ──────────────────────────────────────────────────────────── */
.obs-timeline {
  position: relative;
  padding-left: 2.5rem;
}

.obs-timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 0;
  width: 1px;
  background: var(--obs-border);
}

.obs-timeline__item {
  position: relative;
  padding: 0 0 2rem;
}

.obs-timeline__item::before {
  content: '';
  position: absolute;
  left: -2.13rem;
  top: 6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--obs-text-faint);
  border: 2px solid var(--obs-bg-card);
}

.obs-timeline__item--highlight::before {
  background: var(--obs-red-bright);
  box-shadow: 0 0 0 3px rgba(224,48,48,.2);
}

.obs-timeline__year {
  font-size: .7rem;
  color: var(--obs-red-bright);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 600;
  margin-bottom: .25rem;
}

.obs-timeline__text {
  font-size: .88rem;
  color: var(--obs-text-muted);
  line-height: 1.55;
}

.obs-timeline__text strong {
  color: var(--obs-text);
}

/* ── Scroll reveal utility ─────────────────────────────────────────────── */
.obs-reveal {
  opacity: 0;
  transform: translateY(24px);
}

/* ── Progress bar ──────────────────────────────────────────────────────── */
.obs-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--obs-red-bright);
  z-index: 9999;
  width: 0%;
  transition: width .1s linear;
}

/* ── Footer note ───────────────────────────────────────────────────────── */
.obs-footer-note {
  text-align: center;
  font-size: .78rem;
  color: var(--obs-text-faint);
  padding: 3rem clamp(1.5rem, 5vw, 5rem);
  border-top: 1px solid var(--obs-border);
  line-height: 1.6;
  max-width: 1360px;
  margin: 0 auto;
}

.obs-footer-note a {
  color: var(--obs-text-muted);
}

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 1023px) {
  .obs-chart-grid,
  .obs-chart-grid--thirds,
  .obs-portals-compare { grid-template-columns: 1fr; }

  .obs-kpi-strip__inner {
    grid-template-columns: 1fr 1fr;
  }

  .obs-kpi:nth-child(2n) { border-right: none; }
  .obs-kpi:nth-last-child(-n+2) { border-bottom: 1px solid var(--obs-border); }
}

@media (max-width: 599px) {
  .obs-kpi-strip__inner {
    grid-template-columns: 1fr;
  }

  .obs-kpi { border-right: none; border-bottom: 1px solid var(--obs-border); }
  .obs-kpi:last-child { border-bottom: none; }

  .obs-barlist__item {
    grid-template-columns: 90px 1fr 50px;
  }

  .obs-callout { padding: 1.5rem; }
  .obs-card { padding: 1.25rem; }
}

/* -- Chapter navigation ----------------------------------------------- */
.obs-chapternav {
    position: sticky;
    top: 0;
    z-index: 200;
    background: rgba(13,13,14,.95);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--obs-border);
    margin-top: 2rem;
}
.obs-chapternav__inner {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 clamp(1rem,4vw,4rem);
    display: flex;
    align-items: center;
    gap: 0;
    height: 56px;
    overflow-x: auto;
    scrollbar-width: none;
}
.obs-chapternav__inner::-webkit-scrollbar { display: none; }
.obs-chapternav__item {
    font-size: .85rem;
    letter-spacing: .03em;
    font-weight: 600;
    color: rgba(255,255,255,.55);
    text-decoration: none;
    padding: .45rem .9rem;
    border-radius: 4px;
    white-space: nowrap;
    transition: color .2s, background .2s;
    flex-shrink: 0;
}
.obs-chapternav__item:hover,
.obs-chapternav__item.active {
    color: #fff;
    background: rgba(255,255,255,.1);
}