@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800;1,9..40,300;1,9..40,400&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --bg:        #ffffff;
  --bg2:       #f5f5f5;
  --bg3:       #ebebeb;
  --fg:        #0a0a0a;
  --fg2:       #3a3a3a;
  --fg3:       #767676;
  --border:    #d4d4d4;
  --accent:    #0a0a0a;
  --accent-fg: #ffffff;
  --glass:     rgba(255,255,255,0.85);
  --shadow:    0 2px 24px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.15);
  --radius:    16px;
  --radius-sm: 8px;
  --transition: 0.22s cubic-bezier(.4,0,.2,1);
}

[data-theme="dark"] {
  --bg:        #0a0a0a;
  --bg2:       #141414;
  --bg3:       #1e1e1e;
  --fg:        #f5f5f5;
  --fg2:       #c0c0c0;
  --fg3:       #787878;
  --border:    #2a2a2a;
  --accent:    #f5f5f5;
  --accent-fg: #0a0a0a;
  --glass:     rgba(10,10,10,0.85);
  --shadow:    0 2px 24px rgba(0,0,0,0.40);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.60);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
  overflow-x: hidden;
}

::selection { background: var(--fg); color: var(--bg); }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 6vw, 5rem); }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.8rem); }

p { color: var(--fg2); }
a { color: inherit; text-decoration: none; }

/* ── Layout ─────────────────────────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: var(--glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 64px;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.nav-logo .drop {
  width: 32px; height: 32px;
  background: var(--fg);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg);
  font-size: 0.7rem;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg2);
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--fg); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 100px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  opacity: 0.9;
}

.btn-outline {
  background: transparent;
  color: var(--fg);
  border: 1.5px solid var(--border);
}

.btn-outline:hover {
  background: var(--bg2);
  border-color: var(--fg);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--fg2);
  padding: 8px 16px;
}

.btn-ghost:hover { color: var(--fg); background: var(--bg2); }

.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }

/* ── Theme Toggle ───────────────────────────────────────────── */
.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--bg2);
  border: 1.5px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition);
  color: var(--fg);
}

.theme-toggle:hover { background: var(--bg3); }

/* ── Hero ───────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.06;
}

.hero-blob-1 {
  width: 600px; height: 600px;
  background: var(--fg);
  top: -100px; right: -100px;
}

.hero-blob-2 {
  width: 400px; height: 400px;
  background: var(--fg);
  bottom: -50px; left: -50px;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 16px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--fg2);
  margin-bottom: 28px;
  animation: fadeUp 0.6s ease both;
}

.hero-badge .dot {
  width: 6px; height: 6px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero h1 {
  margin-bottom: 24px;
  animation: fadeUp 0.6s 0.1s ease both;
}

.hero h1 em {
  font-style: normal;
  position: relative;
}

.hero h1 em::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 0; right: 0;
  height: 3px;
  background: var(--fg);
  border-radius: 2px;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--fg2);
  max-width: 560px;
  margin-bottom: 40px;
  animation: fadeUp 0.6s 0.2s ease both;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  animation: fadeUp 0.6s 0.3s ease both;
}

.hero-app-note {
  margin-top: 16px;
  font-size: 0.82rem;
  color: var(--fg3);
  animation: fadeUp 0.6s 0.4s ease both;
}

/* ── Floating Water Drop Deco ───────────────────────────────── */
.hero-visual {
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  width: 45%;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.drop-large {
  width: 340px; height: 340px;
  border: 2px solid var(--border);
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: float 6s ease-in-out infinite;
  position: relative;
}

.drop-large::before {
  content: '';
  position: absolute;
  inset: 24px;
  border: 1px solid var(--border);
  border-radius: 50% 50% 50% 0;
}

.drop-large-inner {
  transform: rotate(45deg);
  text-align: center;
}

.drop-large-inner .drop-icon { font-size: 3.5rem; }
.drop-large-inner p { font-size: 0.8rem; font-weight: 600; color: var(--fg3); }

/* ── Stats Bar ──────────────────────────────────────────────── */
.stats-bar {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 48px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.stat-item {
  text-align: center;
  padding: 16px;
  border-right: 1px solid var(--border);
}

.stat-item:last-child { border-right: none; }

.stat-num {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--fg3);
  font-weight: 500;
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--fg);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 52px; height: 52px;
  background: var(--bg3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.card h3 { margin-bottom: 10px; font-size: 1.15rem; }
.card p  { font-size: 0.9rem; color: var(--fg3); }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

/* ── Section Labels ─────────────────────────────────────────── */
.section-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg3);
  margin-bottom: 16px;
}

.section-header {
  margin-bottom: 64px;
}

.section-header h2 { margin-bottom: 16px; }
.section-header p  { font-size: 1.05rem; max-width: 560px; }

/* ── Pillars ─────────────────────────────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.pillar {
  background: var(--bg);
  padding: 48px 36px;
  transition: background var(--transition);
}

.pillar:hover { background: var(--bg2); }

.pillar-num {
  font-size: 4rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--bg3);
  line-height: 1;
  margin-bottom: 16px;
}

.pillar h3 { margin-bottom: 12px; }

.pillar ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.pillar ul li {
  font-size: 0.88rem;
  color: var(--fg3);
  padding-left: 16px;
  position: relative;
}

.pillar ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--border);
}

/* ── Programs ────────────────────────────────────────────────── */
.programs-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.program-item {
  background: var(--bg);
  padding: 36px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  transition: background var(--transition);
}

.program-item:hover { background: var(--bg2); }

.program-emoji { font-size: 2rem; flex-shrink: 0; }
.program-item h3 { margin-bottom: 6px; font-size: 1rem; }
.program-item p  { font-size: 0.85rem; color: var(--fg3); }

/* ── Impact Section ──────────────────────────────────────────── */
.impact-section {
  background: var(--fg);
  color: var(--bg);
  padding: 100px 0;
}

.impact-section .section-label { color: rgba(255,255,255,0.4); }
.impact-section h2             { color: var(--bg); }
.impact-section p              { color: rgba(255,255,255,0.6); }

.impact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.1);
  margin-top: 64px;
}

.impact-item {
  background: var(--fg);
  padding: 40px 32px;
  text-align: center;
}

[data-theme="dark"] .impact-section { background: #f5f5f5; }
[data-theme="dark"] .impact-section .section-label { color: rgba(0,0,0,0.4); }
[data-theme="dark"] .impact-section h2 { color: #0a0a0a; }
[data-theme="dark"] .impact-section p  { color: rgba(0,0,0,0.6); }
[data-theme="dark"] .impact-item       { background: #f5f5f5; }
[data-theme="dark"] .impact-grid       { background: rgba(0,0,0,0.15); }

.impact-num {
  font-size: clamp(2.2rem, 4vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  display: block;
  line-height: 1;
  margin-bottom: 8px;
  color: var(--bg);
}

[data-theme="dark"] .impact-num { color: #0a0a0a; }

.impact-label {
  font-size: 0.85rem;
  opacity: 0.6;
  color: var(--bg);
}

[data-theme="dark"] .impact-label { color: #0a0a0a; }

.pilot-cities {
  margin-top: 48px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.city-chip {
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 100px;
  padding: 8px 20px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--bg);
}

[data-theme="dark"] .city-chip {
  background: rgba(0,0,0,0.08);
  border-color: rgba(0,0,0,0.15);
  color: #0a0a0a;
}

/* ── SDG Banner ──────────────────────────────────────────────── */
.sdg-banner {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  gap: 32px;
  margin: 64px 0;
}

.sdg-icon {
  font-size: 3rem;
  flex-shrink: 0;
}

.sdg-banner h3 { margin-bottom: 6px; }
.sdg-banner p  { font-size: 0.9rem; }

/* ── Forms ───────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 480px;
  position: relative;
  transform: translateY(20px);
  transition: transform var(--transition);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-overlay.active .modal { transform: translateY(0); }

.modal-close {
  position: absolute;
  top: 16px; right: 16px;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--bg2);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--fg2);
  transition: all var(--transition);
}

.modal-close:hover { background: var(--bg3); color: var(--fg); }

.modal h3 { margin-bottom: 24px; }

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--fg2);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--fg);
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--fg);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-success {
  text-align: center;
  padding: 24px;
}

.form-success .check { font-size: 3rem; margin-bottom: 12px; }

/* ── AI Chat Widget ──────────────────────────────────────────── */
.chat-fab {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 56px; height: 56px;
  background: var(--fg);
  color: var(--bg);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition);
  z-index: 1500;
}

.chat-fab:hover { transform: scale(1.1); }

.chat-panel {
  position: fixed;
  bottom: 96px; right: 28px;
  width: 360px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 1500;
  display: flex;
  flex-direction: column;
  transform: scale(0.9) translateY(20px);
  opacity: 0;
  pointer-events: none;
  transform-origin: bottom right;
  transition: all var(--transition);
  max-height: 500px;
}

.chat-panel.active {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: all;
}

.chat-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-avatar {
  width: 36px; height: 36px;
  background: var(--fg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bg);
  font-size: 1rem;
}

.chat-header-info { flex: 1; }
.chat-header-info h4 { font-size: 0.9rem; margin-bottom: 2px; }
.chat-header-info p  { font-size: 0.75rem; color: var(--fg3); }

.online-dot {
  width: 8px; height: 8px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 240px;
}

.chat-msg {
  max-width: 85%;
  font-size: 0.88rem;
  line-height: 1.5;
  padding: 10px 14px;
  border-radius: 12px;
  animation: fadeUp 0.3s ease;
}

.chat-msg.bot {
  background: var(--bg2);
  color: var(--fg);
  border-radius: 4px 12px 12px 12px;
}

.chat-msg.user {
  background: var(--fg);
  color: var(--bg);
  align-self: flex-end;
  border-radius: 12px 4px 12px 12px;
}

.chat-msg.typing { opacity: 0.6; }

.chat-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

.chat-input {
  flex: 1;
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  padding: 10px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.88rem;
  color: var(--fg);
  outline: none;
  transition: border-color var(--transition);
}

.chat-input:focus { border-color: var(--fg); }

.chat-send {
  width: 38px; height: 38px;
  background: var(--fg);
  color: var(--bg);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: opacity var(--transition);
  flex-shrink: 0;
}

.chat-send:hover { opacity: 0.8; }

/* ── Auth Section ────────────────────────────────────────────── */
.auth-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.btn-google {
  background: var(--bg2);
  color: var(--fg);
  border: 1.5px solid var(--border);
  border-radius: 100px;
  padding: 12px 24px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-google:hover {
  border-color: var(--fg);
  background: var(--bg3);
}

.btn-helix {
  background: var(--fg);
  color: var(--bg);
  border: none;
  border-radius: 100px;
  padding: 12px 24px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-helix:hover { opacity: 0.85; }

.auth-divider {
  text-align: center;
  color: var(--fg3);
  font-size: 0.82rem;
  position: relative;
}

.auth-divider::before, .auth-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 40%;
  height: 1px;
  background: var(--border);
}

.auth-divider::before { left: 0; }
.auth-divider::after  { right: 0; }

/* ── User Avatar in Nav ──────────────────────────────────────── */
.user-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 4px 12px 4px 4px;
  cursor: pointer;
  transition: all var(--transition);
}

.user-chip:hover { border-color: var(--fg); }

.user-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg3);
}

.user-chip span { font-size: 0.82rem; font-weight: 600; }

/* ── Footer ──────────────────────────────────────────────────── */
.footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer h4 { font-size: 0.85rem; font-weight: 700; margin-bottom: 16px; }

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--fg3);
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--fg3);
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: all var(--transition);
  color: var(--fg2);
}

.social-link:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ── Hamburger / Mobile Nav ──────────────────────────────────── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  width: 22px; height: 2px;
  background: var(--fg);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ── PWA Install Banner ──────────────────────────────────────── */
.install-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  z-index: 1400;
  transform: translateY(100%);
  transition: transform var(--transition);
}

.install-banner.visible { transform: translateY(0); }

.install-banner p { font-size: 0.9rem; flex: 1; }
.install-banner p span { font-weight: 700; }

/* ── Animations ──────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: rotate(-45deg) translateY(0); }
  50%       { transform: rotate(-45deg) translateY(-16px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

@keyframes countUp { from { opacity: 0; } to { opacity: 1; } }

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ── Dashboard ───────────────────────────────────────────────── */
.dashboard-header {
  padding: 100px 0 48px;
  border-bottom: 1px solid var(--border);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  padding: 40px 0;
}

.sidebar {
  border-right: 1px solid var(--border);
  padding-right: 32px;
}

.sidebar-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg2);
  transition: all var(--transition);
}

.sidebar-nav a:hover, .sidebar-nav a.active {
  background: var(--bg2);
  color: var(--fg);
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.mobile-open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    gap: 0;
  }
  .nav-links.mobile-open li { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .nav-links.mobile-open li:last-child { border-bottom: none; }
  .hamburger { display: flex; }
  .pillars   { grid-template-columns: 1fr; }
  .programs-list { grid-template-columns: 1fr; }
  .footer-grid   { grid-template-columns: 1fr 1fr; }
  .hero-visual   { display: none; }
  .impact-grid   { grid-template-columns: 1fr; }
  .stats-grid    { grid-template-columns: 1fr; }
  .stat-item     { border-right: none; border-bottom: 1px solid var(--border); }
  .stat-item:last-child { border-bottom: none; }
  .sdg-banner    { flex-direction: column; text-align: center; padding: 32px; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .sidebar       { border-right: none; border-bottom: 1px solid var(--border); padding: 0 0 24px; }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .chat-panel  { width: calc(100vw - 32px); right: 16px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .modal { padding: 28px 20px; }
}

/* ── v2 Water Accent Color ───────────────────────────────────── */
:root {
  --water:       #0ea5e9;
  --water-light: #e0f2fe;
  --water-dark:  #0369a1;
  --green:       #22c55e;
  --amber:       #f59e0b;
}
[data-theme="dark"] {
  --water-light: #082f49;
}

/* ── Hero City Pills ─────────────────────────────────────────── */
.hero-city-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.city-pill {
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 600;
  background: var(--bg2);
  border: 1.5px solid var(--border);
  color: var(--fg2);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}
.city-pill.active,
.city-pill:hover {
  background: var(--water);
  border-color: var(--water);
  color: #fff;
}

/* ── Hero Visual drop stats ──────────────────────────────────── */
.drop-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  justify-content: center;
}
.drop-stats div {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.drop-stats span {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--fg);
}
.drop-stats small {
  font-size: 0.65rem;
  color: var(--fg3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Card hover ──────────────────────────────────────────────── */
.card-hover {
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(14,165,233,0.12);
}

/* ── Card badge ──────────────────────────────────────────────── */
.card-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--water-light);
  color: var(--water-dark);
  letter-spacing: 0.02em;
}

/* ── Program city chips ──────────────────────────────────────── */
.program-cities {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.city-chip-sm {
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  background: var(--bg3);
  color: var(--fg2);
}
.city-chip-sm.diu {
  background: #fff7ed;
  color: #c2410c;
}
[data-theme="dark"] .city-chip-sm.diu {
  background: #431407;
  color: #fb923c;
}

/* ── City Tabs (Dispenser section) ───────────────────────────── */
.city-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.city-tab {
  padding: 10px 24px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1.5px solid var(--border);
  background: var(--bg);
  color: var(--fg2);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}
.city-tab.active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}
.city-tab:hover:not(.active) {
  border-color: var(--water);
  color: var(--water);
}
.tab-count {
  background: var(--bg3);
  color: var(--fg3);
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 100px;
  font-weight: 700;
}
.city-tab.active .tab-count {
  background: rgba(255,255,255,0.2);
  color: inherit;
}

/* ── Dispenser Panels ────────────────────────────────────────── */
.dispenser-panel { display: none; }
.dispenser-panel.active { display: block; }

.dispenser-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.dispenser-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  transition: border-color 0.2s, transform 0.2s;
}
.dispenser-card:hover { border-color: var(--water); transform: translateY(-2px); }
.dispenser-card.coming-soon { opacity: 0.6; }
.dispenser-card.coming-soon:hover { opacity: 0.85; }
.disp-status {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}
.disp-status.active  { background: var(--green); box-shadow: 0 0 8px var(--green); }
.disp-status.offline { background: var(--fg3); }
.disp-info { flex: 1; }
.disp-info h4 { font-size: 0.95rem; margin-bottom: 4px; }
.disp-info p  { font-size: 0.78rem; color: var(--fg3); margin: 0 0 8px; }
.disp-quality { }
.quality-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
}
.quality-badge.excellent { background:#dcfce7;color:#15803d; }
.quality-badge.good      { background:#dbeafe;color:#1d4ed8; }
.quality-badge.soon      { background:var(--bg3);color:var(--fg3); }
[data-theme="dark"] .quality-badge.excellent { background:#14532d;color:#4ade80; }
[data-theme="dark"] .quality-badge.good      { background:#1e3a5f;color:#60a5fa; }
.disp-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}
.disp-liters { font-size: 0.75rem; font-weight: 700; color: var(--water); }
.active-label { font-size: 0.7rem; color: var(--green); font-weight: 600; }

/* ── Impact City Breakdown ───────────────────────────────────── */
.city-impact-breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.city-impact-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform 0.2s;
}
.city-impact-card:hover { transform: translateY(-3px); }
.city-impact-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.city-flag { font-size: 1.5rem; }
.city-impact-header h4 { flex: 1; font-size: 1.05rem; }
.city-dispensers { font-size: 0.72rem; color: var(--fg3); background: var(--bg3); padding: 3px 8px; border-radius: 100px; }
.city-impact-nums {
  display: flex;
  gap: 16px;
  justify-content: space-between;
}
.city-impact-nums div { display: flex; flex-direction: column; align-items: center; }
.city-impact-nums strong { font-size: 1.1rem; font-weight: 800; color: var(--fg); }
.city-impact-nums small  { font-size: 0.68rem; color: var(--fg3); margin-top: 2px; }

.diu-card       { border-top: 3px solid #f97316; }
.vadodara-card  { border-top: 3px solid var(--water); }
.ahmedabad-card { border-top: 3px solid #8b5cf6; }

/* ── Impact Tabs ─────────────────────────────────────────────── */
.impact-tabs {
  display: flex;
  gap: 8px;
  justify-content: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.impact-tab {
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
  border: 1.5px solid rgba(255,255,255,0.3);
  background: transparent;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  transition: all 0.2s;
}
.impact-tab.active,
.impact-tab:hover {
  background: rgba(255,255,255,0.15);
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}

/* ── Quality Grid ────────────────────────────────────────────── */
.quality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.quality-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.quality-metric {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 12px;
}
.metric-val { font-size: 2.2rem; font-weight: 800; color: var(--water); }
.metric-unit { font-size: 0.9rem; font-weight: 600; color: var(--fg3); }
.quality-card h4 { font-size: 1rem; margin-bottom: 6px; }
.quality-card p  { font-size: 0.82rem; color: var(--fg3); margin-bottom: 16px; }
.quality-bar { height: 6px; background: var(--bg3); border-radius: 3px; overflow: hidden; }
.quality-fill { height: 100%; border-radius: 3px; transition: width 1s ease; }

/* ── Sponsor Tiers ───────────────────────────────────────────── */
.tiers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.tier-card {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  position: relative;
}
.tier-featured {
  border-color: var(--water);
  box-shadow: 0 0 0 3px rgba(14,165,233,0.15);
}
.tier-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--water);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 100px;
  white-space: nowrap;
}
.tier-name { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.tier-price { font-size: 1.8rem; font-weight: 800; color: var(--water); margin-bottom: 20px; }
.tier-card ul { list-style: none; text-align: left; margin-bottom: 24px; }
.tier-card ul li { font-size: 0.85rem; color: var(--fg2); padding: 5px 0; border-bottom: 1px solid var(--border); }
.tier-card ul li::before { content: "✓ "; color: var(--green); font-weight: 700; }

/* ── Footer version ──────────────────────────────────────────── */
.footer-version {
  font-size: 0.75rem;
  color: var(--fg3);
  margin-top: 16px;
  padding: 4px 10px;
  background: var(--bg3);
  border-radius: 100px;
  display: inline-block;
}

/* ── Chat Quick Replies ──────────────────────────────────────── */
.chat-quick-replies {
  padding: 8px 12px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--border);
}
.quick-reply {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--fg2);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}
.quick-reply:hover { background: var(--water); color: #fff; border-color: var(--water); }

/* ── Responsive overrides for new sections ───────────────────── */
@media (max-width: 768px) {
  .city-impact-breakdown { grid-template-columns: 1fr; }
  .tiers-grid { grid-template-columns: 1fr; }
  .dispenser-cards { grid-template-columns: 1fr; }
  .quality-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .quality-grid { grid-template-columns: 1fr; }
  .city-tabs { gap: 6px; }
  .city-tab { padding: 8px 14px; font-size: 0.8rem; }
}