/* ============================================
   FoilShare — Battery Sharing Platform
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* ---- Variables ---- */
:root {
  --bg-dark: #0A1628;
  --bg-card: rgba(15, 30, 55, 0.85);
  --blue-sky: #0EA5E9;
  --cyan: #06B6D4;
  --turquoise: #22D3EE;
  --light-blue: #F0F9FF;
  --white: #FFFFFF;
  --text-primary: #F0F9FF;
  --text-secondary: #94A3B8;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --border: rgba(14, 165, 233, 0.15);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 40px rgba(6, 182, 212, 0.2);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: 'Poppins', sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--cyan);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--turquoise);
}

img {
  max-width: 100%;
  display: block;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--blue-sky), var(--turquoise));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-family: 'Poppins', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-sky), var(--cyan));
  color: var(--white);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(14, 165, 233, 0.5);
  color: var(--white);
}

.btn-secondary {
  background: transparent;
  color: var(--cyan);
  border: 2px solid var(--cyan);
}

.btn-secondary:hover {
  background: var(--cyan);
  color: var(--bg-dark);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.875rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-available {
  background: rgba(16, 185, 129, 0.15);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-reserved {
  background: rgba(245, 158, 11, 0.15);
  color: var(--warning);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-charging {
  background: rgba(14, 165, 233, 0.15);
  color: var(--blue-sky);
  border: 1px solid rgba(14, 165, 233, 0.3);
}

.badge-member {
  padding: 3px 10px;
  font-size: 0.7rem;
}

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ---- Auth Screen ---- */
.auth-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-dark);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.auth-screen::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(ellipse at 30% 20%, rgba(14, 165, 233, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 50%);
}

.auth-container {
  position: relative;
  z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  max-width: 480px;
  width: 100%;
}

.auth-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.auth-logo i { color: var(--cyan); font-size: 2.2rem; }
.auth-logo span {
  background: linear-gradient(135deg, var(--blue-sky), var(--turquoise));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

.auth-tagline {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.auth-tab {
  flex: 1;
  padding: 12px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.auth-tab.active {
  background: rgba(14, 165, 233, 0.15);
  color: var(--white);
}

.auth-tab:hover:not(.active) {
  background: rgba(14, 165, 233, 0.05);
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.auth-hint {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-top: 4px;
}

.auth-demo {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.auth-demo p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.demo-users {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.demo-user-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: rgba(14, 165, 233, 0.08);
  border: 1px solid var(--border);
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
}

.demo-user-btn:hover {
  background: rgba(14, 165, 233, 0.2);
  border-color: var(--cyan);
}

.demo-user-btn .mini-avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700; color: var(--white);
}

/* Level select */
.level-select {
  display: flex;
  gap: 10px;
}

.level-option {
  flex: 1;
  cursor: pointer;
}

.level-option input { display: none; }

.level-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-align: center;
}

.level-option input:checked + .level-card {
  border-color: var(--cyan);
  background: rgba(6, 182, 212, 0.1);
}

.level-emoji { font-size: 1.5rem; }
.level-label { font-size: 0.75rem; font-weight: 600; color: var(--text-secondary); }
.level-option input:checked + .level-card .level-label { color: var(--white); }

/* Color picker */
.color-picker {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.color-option { cursor: pointer; }
.color-option input { display: none; }

.color-dot {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: block;
  border: 3px solid transparent;
  transition: var(--transition);
}

.color-option input:checked + .color-dot {
  border-color: var(--white);
  box-shadow: 0 0 0 2px var(--cyan);
  transform: scale(1.15);
}

/* Textarea */
textarea {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  resize: vertical;
  transition: var(--transition);
}

textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

/* ---- Page System ---- */
.page { min-height: 100vh; }
.page-section { padding-top: 120px; }

/* ---- Profile Bio ---- */
.profile-bio {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 12px;
  font-style: italic;
  line-height: 1.6;
}

.form-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 8px;
}

/* ---- Member Modal ---- */
.modal-lg {
  max-width: 600px;
}

.member-modal-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}

.member-modal-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; font-weight: 700; color: var(--white);
  flex-shrink: 0;
}

.member-modal-info h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.member-modal-bio {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.member-modal-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.member-modal-stat {
  text-align: center;
  padding: 12px;
  background: rgba(14, 165, 233, 0.08);
  border-radius: var(--radius-sm);
}

.member-modal-stat .val {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
}

.member-modal-stat .lbl {
  font-size: 0.65rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.member-modal-batteries h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

/* ---- Navbar ---- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 10px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
}

.nav-logo i {
  color: var(--cyan);
  font-size: 1.8rem;
}

.nav-logo span {
  background: linear-gradient(135deg, var(--blue-sky), var(--turquoise));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-menu a {
  padding: 10px 18px;
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--white);
  background: rgba(14, 165, 233, 0.1);
}

.nav-cta {
  margin-left: 12px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

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

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

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

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

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(6, 182, 212, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(6, 182, 212, 0.08) 0%, transparent 40%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.hero-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-content h1 .gradient {
  background: linear-gradient(135deg, var(--blue-sky), var(--turquoise));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--cyan), var(--turquoise));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* Wave decoration */
.wave-divider {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  z-index: 2;
}

.wave-divider svg {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- How it Works ---- */
#how-it-works {
  background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(6, 182, 212, 0.03) 100%);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 30px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.step-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-sky), var(--cyan));
  opacity: 0;
  transition: var(--transition);
}

.step-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(6, 182, 212, 0.3);
}

.step-card:hover::before {
  opacity: 1;
}

.step-icon {
  font-size: 3rem;
  margin-bottom: 20px;
  display: block;
}

.step-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.step-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---- Batteries Section ---- */
#batteries {
  background: var(--bg-dark);
}

.filters {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  justify-content: center;
}

.filter-btn {
  padding: 10px 24px;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: rgba(14, 165, 233, 0.15);
  border-color: var(--blue-sky);
  color: var(--white);
}

.batteries-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 24px;
}

.battery-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.battery-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(6, 182, 212, 0.3);
}

.battery-img {
  height: 180px;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(6, 182, 212, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.battery-img .icon {
  font-size: 4rem;
  opacity: 0.6;
}

.battery-img .status-badge {
  position: absolute;
  top: 16px;
  right: 16px;
}

.battery-body {
  padding: 24px;
}

.battery-brand {
  font-size: 0.8rem;
  color: var(--cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.battery-model {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.battery-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.spec {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.spec i {
  color: var(--cyan);
  width: 16px;
  text-align: center;
}

.spec strong {
  color: var(--text-primary);
}

.health-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 16px;
}

.health-bar-fill {
  height: 100%;
  border-radius: 3px;
  transition: width 1s ease;
}

.health-bar-fill.good { background: var(--success); }
.health-bar-fill.medium { background: var(--warning); }
.health-bar-fill.low { background: var(--danger); }

.battery-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.battery-owner {
  display: flex;
  align-items: center;
  gap: 10px;
}

.owner-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--white);
}

.owner-name {
  font-size: 0.85rem;
  font-weight: 500;
}

.owner-location {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ---- Members Section ---- */
#members {
  background: linear-gradient(180deg, rgba(6, 182, 212, 0.03) 0%, var(--bg-dark) 100%);
}

.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.member-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  transition: var(--transition);
}

.member-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(6, 182, 212, 0.3);
}

.member-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--white);
  position: relative;
}

.member-name {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.member-location {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.member-location i {
  color: var(--cyan);
  margin-right: 4px;
}

.member-badges {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.member-rating {
  color: var(--warning);
  margin-bottom: 16px;
  font-size: 0.9rem;
}

.member-stats {
  display: flex;
  justify-content: center;
  gap: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.member-stat {
  text-align: center;
}

.member-stat-value {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cyan);
}

.member-stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ---- Profile Section ---- */
#profile {
  background: var(--bg-dark);
}

.profile-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 30px;
}

.profile-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  height: fit-content;
}

.profile-avatar-large {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue-sky), var(--cyan));
}

.profile-name {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.profile-location {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.profile-badges {
  display: flex;
  gap: 6px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.profile-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.profile-stat-box {
  background: rgba(14, 165, 233, 0.08);
  border-radius: var(--radius-sm);
  padding: 12px;
}

.profile-stat-box .value {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
}

.profile-stat-box .label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.profile-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.profile-section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.profile-section-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.profile-section-card h3 i {
  color: var(--cyan);
}

/* My Batteries List */
.my-batteries-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.my-battery-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(14, 165, 233, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.my-battery-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.my-battery-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Add Battery Form */
.add-battery-form {
  display: none;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.add-battery-form.show {
  display: flex;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group select {
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394A3B8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

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

/* Reservations */
.reservations-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.reservation-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(14, 165, 233, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
}

.reservation-date {
  background: linear-gradient(135deg, var(--blue-sky), var(--cyan));
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  text-align: center;
  min-width: 60px;
}

.reservation-date .day {
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

.reservation-date .month {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.reservation-info h4 {
  font-size: 0.9rem;
  font-weight: 600;
}

.reservation-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.reservation-rating {
  margin-left: auto;
  color: var(--warning);
  font-size: 0.85rem;
}

/* ---- Modal ---- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal-overlay.show {
  display: flex;
}

.modal {
  background: var(--bg-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition);
  padding: 4px;
}

.modal-close:hover {
  color: var(--white);
}

.modal h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 24px;
}

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

/* ---- Footer ---- */
.footer {
  background: rgba(10, 22, 40, 0.95);
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-about .nav-logo {
  margin-bottom: 16px;
}

.footer-about p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

.footer h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--white);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--bg-dark);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ---- Messages Section ---- */
#messages {
  background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(6, 182, 212, 0.03) 100%);
}

.messages-container {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  height: 520px;
  background: var(--bg-card);
}

.conversations-panel {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.conversations-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.conversations-header h3 {
  font-size: 1rem;
  font-weight: 600;
}

.conversations-list {
  flex: 1;
  overflow-y: auto;
}

.conversation-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 1px solid rgba(14, 165, 233, 0.05);
}

.conversation-item:hover,
.conversation-item.active {
  background: rgba(14, 165, 233, 0.1);
}

.conv-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--white);
  flex-shrink: 0;
}

.conv-info {
  flex: 1;
  min-width: 0;
}

.conv-name {
  font-size: 0.9rem;
  font-weight: 600;
}

.conv-preview {
  font-size: 0.78rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-meta {
  text-align: right;
  flex-shrink: 0;
}

.conv-time {
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.conv-unread {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--cyan);
  color: var(--bg-dark);
  font-size: 0.65rem;
  font-weight: 700;
  margin-top: 4px;
}

.chat-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  gap: 12px;
}

.chat-placeholder i {
  font-size: 3rem;
  opacity: 0.3;
}

.chat-active {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 22, 40, 0.5);
}

.chat-header-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--white);
}

.chat-header-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.chat-header-location {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chat-msg {
  max-width: 75%;
  padding: 10px 16px;
  border-radius: 16px;
  font-size: 0.9rem;
  line-height: 1.5;
  position: relative;
}

.chat-msg.sent {
  align-self: flex-end;
  background: linear-gradient(135deg, var(--blue-sky), var(--cyan));
  color: var(--white);
  border-bottom-right-radius: 4px;
}

.chat-msg.received {
  align-self: flex-start;
  background: rgba(255, 255, 255, 0.08);
  border-bottom-left-radius: 4px;
}

.chat-msg-time {
  font-size: 0.65rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: 4px;
  text-align: right;
}

.chat-msg.received .chat-msg-time {
  text-align: left;
}

.chat-input {
  display: flex;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  background: rgba(10, 22, 40, 0.5);
}

.chat-input input {
  flex: 1;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-primary);
  font-family: 'Poppins', sans-serif;
  font-size: 0.9rem;
  transition: var(--transition);
}

.chat-input input:focus {
  outline: none;
  border-color: var(--cyan);
}

/* New conversation modal members list */
.new-conv-members {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.new-conv-member {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.new-conv-member:hover {
  background: rgba(14, 165, 233, 0.1);
  border-color: var(--cyan);
}

.new-conv-member-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--white);
}

.new-conv-member-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.new-conv-member-loc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Nav badge */
.nav-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--danger);
  color: var(--white);
  font-size: 0.65rem;
  font-weight: 700;
  margin-left: 6px;
}

/* PWA Install Banner */
.pwa-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2500;
  background: linear-gradient(135deg, var(--blue-sky), var(--cyan));
  padding: 14px 24px;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
}

.pwa-banner-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.pwa-banner span {
  font-weight: 600;
  color: var(--white);
}

.pwa-banner .btn {
  background: var(--white);
  color: var(--bg-dark);
}

.pwa-dismiss {
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0 4px;
  line-height: 1;
}

.pwa-dismiss:hover {
  color: var(--white);
}

/* ---- Responsive Messages ---- */
@media (max-width: 768px) {
  .messages-container {
    grid-template-columns: 1fr;
    height: auto;
  }

  .conversations-panel {
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 250px;
  }

  .chat-panel {
    min-height: 350px;
  }
}

/* ---- Toast Notification ---- */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 3000;
  background: var(--bg-card);
  border: 1px solid var(--success);
  border-radius: var(--radius-sm);
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-size: 0.9rem;
  box-shadow: var(--shadow);
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition);
}

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

.toast i {
  color: var(--success);
  font-size: 1.2rem;
}

/* ---- Responsive ---- */
@media (max-width: 968px) {
  .hero-content h1 {
    font-size: 2.5rem;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .profile-container {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(10, 22, 40, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 24px 24px;
    transition: var(--transition);
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-menu a {
    font-size: 1.1rem;
    padding: 14px 18px;
    width: 100%;
  }

  .nav-cta {
    margin-left: 0;
    margin-top: 12px;
  }

  .hamburger {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-stats {
    gap: 30px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .batteries-grid {
    grid-template-columns: 1fr;
  }

  .members-grid {
    grid-template-columns: 1fr;
  }

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

  .section {
    padding: 60px 0;
  }

  .section-title h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 1.6rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .filters {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
}


/* FoilShare additions: spot/pays filter */
.location-filter-wrap { max-width: 520px; margin: -20px auto 36px; }
.location-filter { width: 100%; padding: 15px 18px; border-radius: 999px; border: 1px solid var(--border); background: rgba(255,255,255,0.06); color: var(--text-primary); font-family: 'Poppins', sans-serif; font-size: 0.95rem; }
.location-filter:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(6,182,212,0.15); }
.location-filter::placeholder { color: var(--text-secondary); }
.battery-location-line { display:flex; align-items:center; gap:8px; color:var(--text-secondary); font-size:.9rem; margin-bottom:18px; }
.battery-location-line i { color:var(--cyan); }


/* ---- Battery map + owner actions ---- */
.battery-map-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin: 0 0 34px; box-shadow: var(--shadow); }
.battery-map-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.battery-map-header h3 { font-size: 1.1rem; margin-bottom: 2px; }
.battery-map-header p { color: var(--text-secondary); font-size: .86rem; }
#battery-map { width: 100%; height: 420px; border-radius: var(--radius-sm); overflow: hidden; background: rgba(255,255,255,0.06); }
.leaflet-popup-content-wrapper, .leaflet-popup-tip { background: #0A1628; color: #F0F9FF; }
.map-popup-btn { margin-top: 8px; padding: 7px 12px; border: 0; border-radius: 999px; background: #0EA5E9; color: white; font-weight: 700; cursor: pointer; }
.my-battery-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.btn-xs { padding: 7px 10px; font-size: .72rem; }
.btn-danger { background: rgba(239,68,68,.15); color: #FCA5A5; border: 1px solid rgba(239,68,68,.35); }
.btn-danger:hover { background: rgba(239,68,68,.3); color: white; }
.badge-vacation { background: rgba(236,72,153,.15); color: #F9A8D4; border: 1px solid rgba(236,72,153,.35); }
@media (max-width:768px) { #battery-map { height: 320px; } .my-battery-actions { justify-content:flex-start; margin-top:10px; } }

/* --- Final fixes: hero stats readability + language selector --- */
.nav-lang { display:flex; align-items:center; margin-left:6px; }
.nav-lang select { background:rgba(14,165,233,.12); color:var(--white); border:1px solid var(--border); border-radius:999px; padding:8px 12px; font-family:'Poppins',sans-serif; font-weight:700; cursor:pointer; outline:none; }
.nav-lang select option { color:#0A1628; }
.hero-content { padding-bottom: 24px; }
.hero-stats { row-gap: 18px; margin-bottom: 90px; position: relative; z-index: 5; }
.stat { min-width: 145px; padding: 6px 10px; }
.stat-label { line-height: 1.25; white-space: normal; }
@media (max-width: 768px) {
  .hero { min-height: auto; padding-bottom: 80px; }
  .hero-stats { display:grid !important; grid-template-columns: repeat(3, minmax(0, 1fr)); gap:10px !important; margin-bottom:110px; }
  .stat { min-width:0; padding:8px 4px; }
  .stat-number { font-size:1.75rem !important; line-height:1; }
  .stat-label { font-size:.72rem; line-height:1.15; }
  .nav-lang { width:100%; justify-content:center; margin:8px 0 0; }
  .nav-lang select { width:110px; text-align:center; }
}
@media (max-width: 420px) {
  .hero-stats { gap:6px !important; margin-bottom:120px; }
  .stat-number { font-size:1.55rem !important; }
  .stat-label { font-size:.66rem; }
}

/* Charger option */
.charger-option { display:flex; align-items:center; gap:10px; margin:8px 0 16px; padding:12px 14px; border:1px solid var(--border); border-radius:var(--radius-sm); background:rgba(14,165,233,.06); color:var(--text-primary); cursor:pointer; }
.charger-option input { width:auto; }
.battery-charger-line { margin:10px 0 14px; color:var(--turquoise); font-size:.9rem; font-weight:600; }
.battery-charger-line i { margin-right:6px; }