:root {
  --bg-paper: #f4f1e8;
  --bg-ice: #edf3ef;
  --card: #fbfbf7cc;
  --card-strong: #ffffffea;
  --ink: #16242f;
  --ink-muted: #4f6270;
  --accent: #cf5a33;
  --accent-deep: #8f3218;
  --line: #d8ddd6;
  --nav: #24434d;
  --nav-active: #ffffff;
  --shadow: 0 18px 44px rgba(22, 36, 47, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  position: relative;
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--ink);
  background: linear-gradient(150deg, var(--bg-paper) 0%, var(--bg-ice) 100%);
  overflow-x: hidden;
}

.bg-layer {
  position: fixed;
  z-index: -1;
  pointer-events: none;
  filter: blur(4px);
}

.bg-layer-top {
  width: 42rem;
  height: 42rem;
  top: -14rem;
  right: -10rem;
  background: radial-gradient(circle at center, rgba(207, 90, 51, 0.22) 0%, rgba(207, 90, 51, 0) 70%);
}

.bg-layer-bottom {
  width: 48rem;
  height: 48rem;
  bottom: -18rem;
  left: -14rem;
  background: radial-gradient(circle at center, rgba(36, 67, 77, 0.22) 0%, rgba(36, 67, 77, 0) 74%);
}

.site-header {
  width: min(1240px, calc(100% - 3rem));
  margin: 1.2rem auto 0;
  padding: 0.9rem 1.3rem 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  backdrop-filter: blur(8px);
  box-shadow: 0 12px 28px rgba(22, 36, 47, 0.08);
}

.header-row {
  display: flex;
  align-items: center;
  width: 100%;
}

.header-row-top {
  justify-content: space-between;
  gap: 0.8rem;
}

.header-row-bottom {
  justify-content: space-between;
  gap: 0.8rem;
}

.course-name {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ink);
  white-space: nowrap;
}

.school-name {
  margin: 0;
  font-family: "Manrope", "Segoe UI", sans-serif;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-muted);
}

.team-members-header {
  margin: 0;
  font-size: 0.86rem;
  font-weight: 700;
  color: #244f60;
  text-align: right;
}

.nav-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: nowrap;
  justify-content: flex-start;
  gap: 0.5rem;
}

.nav-links a {
  display: inline-block;
  white-space: nowrap;
  text-decoration: none;
  color: var(--nav);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 160ms ease;
}

.nav-links a:hover {
  border-color: rgba(36, 67, 77, 0.26);
  background: rgba(255, 255, 255, 0.72);
}

.nav-links a.active {
  color: var(--nav-active);
  background: linear-gradient(120deg, #2f5f6b 0%, #1e4954 100%);
  border-color: #1e4954;
}

.page-content {
  width: min(1240px, calc(100% - 3rem));
  margin: 1rem auto 2.6rem;
  display: grid;
  gap: 1rem;
}

.intro-card {
  padding: 1.4rem 1.6rem 1.5rem;
  border-radius: 24px;
  border: 1px solid rgba(22, 36, 47, 0.11);
  background: linear-gradient(138deg, var(--card-strong) 0%, #f7f8f4ea 100%);
  box-shadow: var(--shadow);
  animation: rise-in 560ms ease-out both;
}

.eyebrow {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

h1 {
  margin: 0.4rem 0 0.6rem;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: clamp(1.45rem, 1.9vw + 0.75rem, 2.25rem);
  letter-spacing: -0.01em;
  line-height: 1.12;
}

.team-members {
  margin: 0 0 0.45rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: #254655;
}

.intro-text {
  max-width: 72ch;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.99rem;
}

.metric-controls {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.metric-button {
  border: 1px solid rgba(22, 36, 47, 0.2);
  background: #ffffff;
  color: #17313b;
  padding: 0.62rem 0.94rem;
  border-radius: 12px;
  font-family: "Manrope", "Segoe UI", sans-serif;
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.metric-button:hover {
  transform: translateY(-1px);
  border-color: rgba(36, 67, 77, 0.36);
  background: #f2f7f5;
}

.metric-button.active {
  border-color: var(--accent);
  color: #fff;
  background: linear-gradient(120deg, var(--accent) 0%, var(--accent-deep) 100%);
}

.chart-card {
  border-radius: 24px;
  padding: 0.9rem;
  border: 1px solid rgba(22, 36, 47, 0.11);
  background: linear-gradient(160deg, #fdfdf9f2 0%, #f4f8f6f2 100%);
  box-shadow: var(--shadow);
  animation: rise-in 640ms ease-out both;
}

.chart-wrap {
  overflow-x: auto;
  border-radius: 18px;
  border: 1px solid rgba(22, 36, 47, 0.1);
  background: linear-gradient(180deg, #ffffff 0%, #f6f8f5 100%);
  padding: 0.6rem;
}

.chart-placeholder-wrap {
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chart-placeholder {
  width: min(760px, 92%);
  min-height: 240px;
  border: 2px dashed rgba(36, 67, 77, 0.28);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.2rem 1rem;
  background: rgba(255, 255, 255, 0.72);
}

.placeholder-title {
  margin: 0 0 0.5rem;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: #193847;
}

.chart-placeholder p {
  margin: 0;
  color: var(--ink-muted);
}

#stacked-bar-chart {
  display: block;
  width: 100%;
  max-width: 100%;
  min-width: 960px;
  height: auto;
}

#stacked-bar-chart text {
  font-family: "Manrope", "Segoe UI", sans-serif;
  fill: #1e2f39;
}

#stacked-bar-chart rect {
  cursor: pointer;
}

.grid-line {
  stroke: #c9d2cb;
  stroke-width: 1;
}

.line {
  fill: none;
  stroke: #1a2026;
  stroke-width: 2.4;
}

.vis1-hover-capture {
  fill: transparent;
  cursor: crosshair;
}

.vis1-hover-band {
  fill: rgba(38, 70, 83, 0.08);
  pointer-events: none;
}

.vis1-hover-line {
  stroke: #2f4d59;
  stroke-width: 1.2;
  stroke-dasharray: 3, 3;
  pointer-events: none;
}

.vis1-focus-dot {
  fill: #cf5a33;
  stroke: #ffffff;
  stroke-width: 1.3;
  pointer-events: none;
}

.vis1-tooltip {
  position: fixed;
  pointer-events: none;
  z-index: 20;
  min-width: 230px;
  max-width: 340px;
  padding: 0.55rem 0.65rem;
  border-radius: 10px;
  color: #fff;
  background: rgba(18, 34, 42, 0.94);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.22);
  font-size: 0.78rem;
  line-height: 1.3;
  transform: translate(0, -100%);
}

.vis1-tooltip-year {
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  font-size: 0.84rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.vis1-tooltip-row {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  margin: 0.12rem 0;
}

.vis1-tooltip-row strong {
  font-weight: 700;
}

.vis1-tooltip-divider {
  margin: 0.34rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.24);
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .site-header {
    width: calc(100% - 1.4rem);
    margin-top: 0.7rem;
    padding: 0.8rem 0.9rem;
    align-items: stretch;
  }

  .header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
  }

  .nav-links {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .page-content {
    width: calc(100% - 1.4rem);
    margin-top: 0.8rem;
  }

  .course-name {
    font-size: 0.93rem;
    white-space: normal;
  }

  .team-members-header {
    text-align: left;
    font-size: 0.82rem;
  }
}

@media (max-width: 680px) {
  .course-name {
    font-size: 0.88rem;
  }

  .school-name {
    font-size: 0.8rem;
  }

  h1 {
    line-height: 1.16;
  }

  .metric-button {
    width: 100%;
    text-align: left;
  }

  .chart-card {
    padding: 0.55rem;
  }
}