/* ── Reset & Base ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --black: #0a0a0a;
  --black-light: #1a1a1a;
  --black-mid: #2a2a2a;
  --accent: #004785;       /* Wharton Blue */
  --accent-hover: #005ba1;
  --accent-light: rgba(0,71,133,.1);
  --white: #ffffff;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #e5e5e5;
  --gray-400: #a3a3a3;
  --gray-600: #525252;
  --gray-800: #262626;
  --text: #171717;
  --radius: 8px;
  --transition: .25s ease;
  --max-width: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--white);
}

a { text-decoration: none; color: inherit; }
img, svg { display: block; max-width: 100%; }
ul { list-style: none; }

/* ── Scroll Reveal Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .6s ease, transform .6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity .6s ease, transform .6s ease;
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity .6s ease, transform .6s ease;
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ── Navigation ── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(10,10,10,.95);
  border-bottom: 1px solid rgba(255,255,255,.06);
  backdrop-filter: blur(16px);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(10,10,10,.98);
  box-shadow: 0 2px 20px rgba(0,0,0,.3);
}

.nav-inner {
  margin: 0 auto;
  padding: 0 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo img, .nav-logo svg {
  height: 28px;
  width: auto;
  transform: translateY(6px);
}

.nav-logo-label {
  font-family: 'Minion Pro', 'Times New Roman', serif;
  font-size: 24px;
  line-height: 1;
  color: rgba(255,255,255,0.8);
  white-space: nowrap;
  letter-spacing: 0.01em;
  transform: translateY(0px);
}

.nav-links { display: flex; gap: 2rem; align-items: center; }

.nav-links a {
  color: rgba(255,255,255,.65);
  font-size: .85rem;
  font-weight: 500;
  letter-spacing: .06em;
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover, .nav-links a.active {
  color: var(--white);
}

.nav-links a:hover::after, .nav-links a.active::after {
  width: 100%;
}

.nav-links .btn-connect {
  background: var(--accent);
  color: var(--white);
  padding: .5rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  letter-spacing: .02em;
  transition: background var(--transition), transform var(--transition);
}

.nav-links .btn-connect::after { display: none; }

.nav-links .btn-connect:hover {
  background: var(--accent-hover);
  color: var(--white);
  transform: translateY(-1px);
}

/* Mobile menu toggle */
.nav-toggle {
  display: none;
  background: none; border: none;
  cursor: pointer; padding: .5rem;
}

.nav-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--white);
  margin: 5px 0;
  transition: var(--transition);
  transform-origin: center;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 1200px) {
  .nav-logo-label { font-size: 22px; }
}

@media (max-width: 1024px) {
  .nav-logo-label { display: none; }
}

/* ── Hero ── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--black);
  color: var(--white);
  padding: 6rem 2rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 40%, rgba(0,71,133,.12) 0%, transparent 70%);
}

.hero::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0,0,0,.4) 100%);
}

.hero-content { position: relative; z-index: 1; max-width: 800px; }

.hero-logo {
  width: clamp(540px, 45vw, 820px);
  margin: 0 auto 2.5rem;
  opacity: 0;
  transform: scale(.95);
  animation: heroFadeIn .8s ease .2s forwards;
}

@keyframes heroFadeIn {
  to { opacity: 1; transform: scale(1); }
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 1rem;
  line-height: 1.15;
  opacity: 0;
  transform: translateY(20px);
  animation: heroFadeIn .8s ease .5s forwards;
}

.hero .typed-cursor {
  display: inline-block;
  width: 3px;
  background: var(--accent);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

.hero p {
  font-size: 1.15rem;
  color: rgba(255,255,255,.55);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
  opacity: 0;
  animation: heroFadeIn .8s ease .8s forwards;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: heroFadeIn .8s ease 1s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: .875rem 2rem;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .02em;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,71,133,.3);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.25);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255,255,255,.05);
  transform: translateY(-2px);
}

/* ── Sections ── */
.section {
  padding: 6rem 2rem;
  position: relative;
  z-index: 1;
  background: var(--white);
}

.section-dark {
  background: var(--black);
  color: var(--white);
}

.section-light {
  background: var(--gray-50);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: .75rem;
  letter-spacing: -.01em;
}

.section-header p {
  color: var(--gray-600);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-dark .section-header p {
  color: rgba(255,255,255,.5);
}

.accent-line {
  width: 60px; height: 3px;
  background: var(--accent);
  margin: 1rem auto 0;
  border-radius: 2px;
}

/* ── Cards Grid ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  border: 1px solid var(--gray-200);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,.08);
  border-color: var(--accent);
}

.card-icon {
  width: 48px; height: 48px;
  background: var(--accent);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.4rem;
}

.card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: .75rem;
}

.card p {
  color: var(--gray-600);
  font-size: .95rem;
  line-height: 1.7;
}

/* ── Page Header (for inner pages) ── */
.page-header {
  padding: 10rem 2rem 4rem;
  background: var(--black);
  color: var(--white);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 80%, rgba(0,71,133,.1) 0%, transparent 60%);
}

.page-header h1 {
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: .5rem;
  position: relative;
}

.page-header p {
  color: rgba(255,255,255,.5);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

/* ── Leadership Cards ── */
.leader-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.leader-card {
  background: var(--white);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--gray-200);
  transition: transform var(--transition), box-shadow var(--transition);
}

.leader-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,.08);
}

.leader-photo {
  width: 100%; height: 280px;
  background: linear-gradient(135deg, var(--black-light), var(--black-mid));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--accent);
}

.leader-info {
  padding: 1.5rem;
}

.leader-info h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: .25rem;
}

.leader-info .role {
  color: var(--accent);
  font-size: .85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: .75rem;
}

.leader-info p {
  color: var(--gray-600);
  font-size: .9rem;
  line-height: 1.6;
}

/* ── Contact Section ── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-item-icon {
  width: 40px; height: 40px;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--accent);
}

.contact-item h4 {
  font-size: .95rem;
  font-weight: 600;
  margin-bottom: .15rem;
}

.contact-item p {
  color: var(--gray-600);
  font-size: .9rem;
}

/* ── Forms ── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: .4rem;
  color: var(--gray-800);
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: .75rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: .95rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--white);
  color: var(--text);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,71,133,.12);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-error {
  color: #dc2626;
  font-size: .8rem;
  margin-top: .25rem;
  display: none;
}

.form-group.error input,
.form-group.error textarea {
  border-color: #dc2626;
}

.form-group.error .form-error {
  display: block;
}

.form-success {
  background: rgba(0,71,133,.08);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  color: var(--accent);
  font-weight: 500;
  text-align: center;
  display: none;
  animation: fadeIn .4s ease;
}

.form-success.show { display: block; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Login Page ── */
.login-page {
  min-height: 100vh;
  display: flex;
}

.login-left {
  flex: 1;
  background: var(--black);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.login-left::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,71,133,.12) 0%, transparent 70%);
}

.login-left > * { position: relative; }

.login-left .login-brand {
  width: 280px;
  margin-bottom: 2rem;
}

.login-left h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: .75rem;
  text-align: center;
}

.login-left p {
  color: rgba(255,255,255,.5);
  text-align: center;
  max-width: 360px;
  line-height: 1.7;
}

.login-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  background: var(--gray-50);
}

.login-box {
  width: 100%;
  max-width: 420px;
  background: var(--white);
  border-radius: 16px;
  padding: 2.5rem;
  border: 1px solid var(--gray-200);
  box-shadow: 0 4px 24px rgba(0,0,0,.04);
}

.login-box h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: .25rem;
}

.login-box .subtitle {
  color: var(--gray-600);
  font-size: .9rem;
  margin-bottom: 2rem;
}

.login-box .btn {
  width: 100%;
  justify-content: center;
  margin-top: .5rem;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--gray-400);
  font-size: .8rem;
}

.login-divider::before, .login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gray-200);
}

.login-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: .85rem;
  color: var(--gray-600);
}

.login-footer a {
  color: var(--accent);
  font-weight: 600;
}

.password-toggle {
  position: relative;
}

.password-toggle button {
  position: absolute;
  right: .75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  font-size: .85rem;
  font-family: inherit;
}

.password-toggle button:hover { color: var(--text); }

.password-strength {
  height: 4px;
  border-radius: 2px;
  background: var(--gray-200);
  margin-top: .5rem;
  overflow: hidden;
}

.password-strength-bar {
  height: 100%;
  width: 0;
  border-radius: 2px;
  transition: width .3s ease, background .3s ease;
}

.remember-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  font-size: .85rem;
}

.remember-row label {
  display: flex;
  align-items: center;
  gap: .4rem;
  cursor: pointer;
  color: var(--gray-600);
}

.remember-row a {
  color: var(--accent);
  font-weight: 500;
}

/* ── Stats Bar ── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
  padding: 3rem 0;
}

.stat h3 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: .25rem;
}

.stat p {
  font-size: .9rem;
  color: rgba(255,255,255,.5);
  text-transform: uppercase;
  letter-spacing: .05em;
}

/* ── Footer ── */
.footer {
  background: var(--black);
  color: rgba(255,255,255,.4);
  padding: 3rem 2rem 2rem;
  border-top: 1px solid rgba(255,255,255,.06);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo { height: 32px; opacity: .5; }

.footer p { font-size: .85rem; }

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: .85rem;
  color: rgba(255,255,255,.4);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--white); }

/* ── Timeline (About page) ── */
.timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--gray-200);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
  padding-left: 2rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: .35rem;
  width: 12px; height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--white);
  box-shadow: 0 0 0 2px var(--accent);
}

.timeline-item h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: .25rem;
}

.timeline-item .year {
  color: var(--accent);
  font-weight: 600;
  font-size: .85rem;
  margin-bottom: .5rem;
}

.timeline-item p {
  color: var(--gray-600);
  font-size: .9rem;
}

/* ── Back to Top ── */
.back-to-top {
  position: fixed;
  bottom: 2rem; right: 2rem;
  width: 44px; height: 44px;
  background: var(--accent);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: var(--accent-hover);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px; left: 0; right: 0;
    background: rgba(10,10,10,.98);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1.25rem;
    border-top: 1px solid rgba(255,255,255,.06);
  }

  .nav-links.open { display: flex; }

  .hero h1 { font-size: 2rem; }
  .hero-logo { width: 240px; }
  .page-header h1 { font-size: 2rem; }

  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }

  .login-page { flex-direction: column; }
  .login-left { padding: 4rem 2rem 2rem; min-height: auto; }
  .login-left .login-brand { width: 180px; }
}