:root {
  --bg: #080d13;
  --bg-card: #0f1923;
  --bg-card-hover: #142030;
  --bg-input: #0b1119;
  --accent: #2dd4bf;
  --accent-dim: rgba(45,212,191,0.08);
  --accent-glow: rgba(45,212,191,0.12);
  --accent-bright: #5eead4;
  --purple: #8b5cf6;
  --purple-dim: rgba(139,92,246,0.08);
  --white: #f1f5f9;
  --text: #e2e8f0;
  --text-dim: #64748b;
  --text-muted: #334155;
  --border: #1e293b;
  --border-light: #283548;
  --danger: #f43f5e;
  --gradient: linear-gradient(135deg, #2dd4bf, #8b5cf6);
  --surface: #0f1923;
}
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-input: #f1f5f9;
    --text: #1e293b;
    --text-dim: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #cbd5e1;
    --white: #1e293b;
    --surface: #f1f5f9;
  }
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}
.header {
  background: rgba(8,13,19,0.8);
  border-bottom: 1px solid var(--border);
  padding: 14px 0;
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(24px);
}
.header-inner {
  max-width: 960px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-size: 1.2rem; font-weight: 900; color: var(--white); letter-spacing: 0.3px; }
.brand-name .mr { color: var(--accent); }
.brand-name .dot { color: var(--purple); }
.brand-name .dive { color: var(--text-dim); font-weight: 600; margin-left: 4px; font-size: 1rem; }
.brand-sub {
  font-size: 0.5rem; letter-spacing: 3px; text-transform: uppercase;
  color: var(--text-muted); margin-top: 2px;
}
.header-right { display:flex; align-items:center; gap:12px; flex-wrap:wrap; }
.header-stats { display: flex; gap: 8px; }
.stat {
  text-align: center; padding: 6px 12px;
  background: var(--accent-dim);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.stat-num {
  font-size: 1.1rem; font-weight: 800; color: var(--accent);
  line-height: 1; font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 0.48rem; letter-spacing: 2px; text-transform: uppercase;
  color: var(--text-muted); margin-top: 2px;
}
.lang-toggle {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 8px; padding: 5px 10px; color: var(--text-dim);
  font-size: 0.7rem; font-weight: 700; cursor: pointer;
  transition: all 0.2s; font-family: inherit;
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }
.container { max-width: 960px; margin: 0 auto; padding: 18px 20px 60px; }
.tabs-bar {
  display: flex; gap: 2px; margin-bottom: 18px;
  background: var(--bg-card); border-radius: 12px;
  padding: 3px; border: 1px solid var(--border);
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  scrollbar-width: none; white-space: nowrap;
}
.tabs-bar::-webkit-scrollbar { display: none; }
.tab {
  padding: 8px 12px; border: none; background: transparent;
  color: var(--text-dim); font-size: 0.72rem; font-weight: 700;
  cursor: pointer; border-radius: 9px; transition: all 0.2s;
  font-family: inherit; flex-shrink: 0;
}
.tab.active {
  background: var(--gradient); color: #080d13;
  box-shadow: 0 2px 16px rgba(45,212,191,0.2);
}
.tab:not(.active):hover { color: var(--text); background: rgba(255,255,255,0.03); }
#tab-more { display: none; }
.more-menu { display: none; }

@media (max-width: 600px) {
  .tabs-bar {
    position: fixed; bottom: 0; left: 0; right: 0;
    margin: 0; border-radius: 0; z-index: 1000;
    padding: 6px 0 10px; gap: 0;
    display: flex; justify-content: space-around;
    border: none; border-top: 1px solid var(--border);
    overflow: visible; white-space: normal;
    background: var(--bg-card);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.15);
  }
  .tab {
    padding: 4px 0; font-size: 0.55rem; border-radius: 0;
    display: flex; flex-direction: column; align-items: center; gap: 2px;
    min-width: 0; flex: 1; letter-spacing: 0;
  }
  .tab::before {
    font-size: 1.2rem; display: block; line-height: 1;
  }
  #tab-log::before { content: '📋'; }
  #tab-history::before { content: '🌊'; }
  #tab-stats::before { content: '📊'; }
  #tab-map::before { content: '🗺'; }
  #tab-more::before { content: '⋯'; }
  .tab.active { background: none; color: var(--accent); box-shadow: none; }
  .tab:not(.active) { color: var(--text-muted); }
  /* Hide secondary tabs on mobile by default */
  #tab-certs, #tab-gear, #tab-plan, #tab-checklist, #tab-shop { display: none; }
  #tab-more { display: flex; }
  .more-menu {
    display: none; position: fixed; bottom: 64px; right: 8px; left: 8px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: 14px; padding: 8px; z-index: 1001;
    box-shadow: 0 -8px 32px rgba(0,0,0,0.3);
    flex-wrap: wrap; gap: 4px; justify-content: center;
  }
  .more-menu.open { display: flex; }
  .more-menu .tab { display: flex; flex: 0 0 auto; padding: 10px 14px; font-size: 0.72rem; border-radius: 8px; flex-direction: row; gap: 6px; }
  .more-menu .tab::before { display: none; }
  .container { padding-bottom: 80px !important; }
}
.panel { display: none; animation: fadeUp 0.25s ease; }
.panel.active { display: block; }
@keyframes fadeUp { from{opacity:0;transform:translateY(6px)} to{opacity:1;transform:translateY(0)} }
.card {
  background: var(--bg-card); border-radius: 14px;
  padding: 24px; border: 1px solid var(--border);
  overflow: hidden;
}
.card-title {
  font-size: 0.9rem; font-weight: 800; color: var(--text);
  margin-bottom: 18px; padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.card-title .accent { color: var(--accent); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 11px; margin-bottom: 11px; }
.form-group { display: flex; flex-direction: column; gap: 4px; overflow:hidden; }
.form-group.full { grid-column: 1 / -1; }
label {
  font-size: 0.58rem; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase; color: var(--text-muted);
}
input, select, textarea {
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 8px; padding: 9px 11px; color: var(--text);
  font-family: inherit; font-size: 0.82rem;
  transition: all 0.2s; outline: none; width: 100%;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-glow);
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
select { cursor: pointer; }
select option { background: var(--bg-card); color: var(--text); }
textarea { resize: vertical; min-height: 72px; }
.depth-display { display:flex; align-items:center; gap:8px; margin-top:3px; }
.depth-bar { flex:1; height:4px; background:var(--border); border-radius:2px; overflow:hidden; }
.depth-fill {
  height:100%; border-radius:2px; transition:width 0.3s;
  background: var(--gradient); width:0%;
}
.depth-val { font-size:0.82rem; font-weight:800; color:var(--accent); min-width:40px; text-align:right; }
.stars { display:flex; gap:3px; }
.star { font-size:1.2rem; cursor:pointer; transition:all 0.15s; filter:grayscale(1) opacity(0.2); }
.star.active,.star:hover { filter:none; transform:scale(1.15); }
.btn-primary {
  background: var(--gradient);
  border:none; border-radius:10px; padding:12px 24px;
  color:#080d13; font-size:0.8rem; font-weight:800;
  letter-spacing:1.5px; text-transform:uppercase;
  cursor:pointer; transition:all 0.25s; width:100%; margin-top:6px;
  box-shadow:0 4px 20px rgba(45,212,191,0.15); font-family:inherit;
}
.btn-primary:hover { transform:translateY(-1px); box-shadow:0 6px 28px rgba(45,212,191,0.25); }
.filters { display:flex; gap:8px; margin-bottom:14px; flex-wrap:wrap; }
.search-input {
  flex:1; min-width:170px; background:var(--bg-card);
  border:1px solid var(--border); border-radius:8px;
  padding:9px 12px; color:var(--text); font-family:inherit;
  font-size:0.82rem; outline:none; transition:all 0.2s;
}
.search-input:focus { border-color:var(--accent); }
.search-input::placeholder { color:var(--text-muted); }
.filter-select {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:8px; padding:9px 12px; color:var(--text);
  font-family:inherit; font-size:0.76rem; cursor:pointer; outline:none;
}
.dives-list { display:flex; flex-direction:column; gap:6px; }
.dive-card {
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:12px; padding:14px 16px;
  display:grid; grid-template-columns:44px 1fr auto;
  gap:12px; align-items:center; cursor:pointer; transition:all 0.2s;
}
.dive-card:hover {
  border-color: rgba(45,212,191,0.25);
  background:var(--bg-card-hover);
  box-shadow:0 2px 16px rgba(45,212,191,0.06);
}
.dive-num {
  width:42px; height:42px;
  background: var(--gradient);
  border-radius:10px; display:flex; align-items:center; justify-content:center;
  font-size:0.82rem; font-weight:800; color:#080d13;
}
.dive-info h3 { font-size:0.84rem; font-weight:700; color:var(--text); margin-bottom:3px; }
.dive-meta { display:flex; gap:10px; flex-wrap:wrap; }
.chip { font-size:0.64rem; color:var(--text-dim); display:flex; align-items:center; gap:2px; }
.chip span { color:var(--text); font-weight:600; }
.dive-depth-col { text-align:right; }
.depth-big { font-size:1.3rem; font-weight:800; color:var(--accent); line-height:1; }
.depth-unit { font-size:0.48rem; letter-spacing:2px; color:var(--text-muted); text-transform:uppercase; }
.empty-state { text-align:center; padding:50px 20px; }
.empty-icon { font-size:2.5rem; display:block; margin-bottom:10px; opacity:0.2; }
.empty-state h3 { font-weight:800; font-size:0.9rem; color:var(--text-dim); margin-bottom:3px; }
.empty-state p { font-size:0.76rem; color:var(--text-muted); }
.shop-panel { background:var(--bg-card); border-radius:14px; overflow:hidden; border:1px solid var(--border); }
.shop-header {
  background:linear-gradient(135deg, #0b1119, #0f1923);
  padding:22px; display:flex; align-items:center; gap:14px;
  border-bottom:1px solid var(--border);
}
.shop-header-text h2 { font-size:1.05rem; font-weight:800; color:var(--text); margin-bottom:2px; }
.shop-header-text p { color:var(--text-dim); font-size:0.76rem; }
.shop-icon {
  width:46px; height:46px; background:var(--accent-dim);
  border-radius:12px; display:flex; align-items:center; justify-content:center;
  font-size:1.3rem; border:1px solid var(--border); flex-shrink:0;
}
.shop-body { padding:22px; }
.shop-categories { display:grid; grid-template-columns:repeat(3,1fr); gap:8px; margin-bottom:18px; }
.shop-cat {
  background:var(--bg-input); border:1px solid var(--border);
  border-radius:10px; padding:14px 10px; text-align:center;
  cursor:pointer; transition:all 0.2s; text-decoration:none; display:block;
}
.shop-cat:hover { border-color:var(--accent); background:var(--bg-card-hover); }
.shop-cat-icon { font-size:1.3rem; display:block; margin-bottom:4px; }
.shop-cat-name {
  font-size:0.62rem; font-weight:700; color:var(--text-dim);
  text-transform:uppercase; letter-spacing:0.8px;
}
.btn-shop {
  display:flex; align-items:center; justify-content:center; gap:8px;
  background: var(--gradient);
  border:none; border-radius:10px; padding:12px 24px;
  color:#080d13; font-size:0.8rem; font-weight:800;
  letter-spacing:1px; text-transform:uppercase;
  cursor:pointer; text-decoration:none; width:100%; transition:all 0.25s;
  box-shadow:0 4px 20px rgba(45,212,191,0.15);
}
.btn-shop:hover { transform:translateY(-1px); box-shadow:0 6px 28px rgba(45,212,191,0.25); }
.modal-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,0.8);
  backdrop-filter:blur(12px); z-index:200;
  display:none; align-items:center; justify-content:center; padding:20px;
}
.modal-overlay.open { display:flex; }
.modal {
  background:var(--bg-card); border-radius:14px; padding:24px;
  max-width:520px; width:100%; max-height:82vh; overflow-y:auto;
  position:relative; box-shadow:0 30px 80px rgba(0,0,0,0.6);
  animation:modalIn 0.25s cubic-bezier(0.34,1.56,0.64,1);
  border:1px solid var(--border);
}
.modal::before {
  content:''; position:absolute; top:0; left:0; right:0; height:3px;
  background: var(--gradient); border-radius:14px 14px 0 0;
}
@keyframes modalIn { from{transform:scale(0.95) translateY(14px);opacity:0} to{transform:scale(1) translateY(0);opacity:1} }
.modal-close {
  position:absolute; top:12px; right:12px;
  background:var(--bg-input); border:1px solid var(--border);
  border-radius:6px; color:var(--text-dim); cursor:pointer;
  width:26px; height:26px; display:flex; align-items:center; justify-content:center;
  font-size:0.78rem; transition:all 0.2s;
}
.modal-close:hover { background:var(--border); color:var(--text); }
.modal-badge {
  display:inline-flex; align-items:center;
  background: var(--gradient);
  color:#080d13; border-radius:6px; padding:3px 9px;
  font-weight:800; font-size:0.65rem; letter-spacing:1px;
  text-transform:uppercase; margin-bottom:10px;
}
.modal h2 { font-size:1.05rem; font-weight:800; color:var(--text); margin-bottom:3px; }
.modal-stats { display:grid; grid-template-columns:repeat(3,1fr); gap:6px; margin:12px 0; }
.m-stat {
  background:var(--bg-input); border:1px solid var(--border);
  border-radius:10px; padding:10px; text-align:center;
}
.m-stat-val { font-size:1.15rem; font-weight:800; color:var(--accent); line-height:1; margin-bottom:2px; }
.m-stat-label { font-size:0.48rem; letter-spacing:2px; color:var(--text-muted); text-transform:uppercase; font-weight:700; }
.modal-notes {
  background:var(--bg-input); border-radius:8px; padding:12px;
  font-size:0.78rem; line-height:1.6; color:var(--text);
  border-left:3px solid var(--accent); margin-top:4px;
}
.modal-section-title {
  font-size:0.52rem; letter-spacing:2px; color:var(--text-muted);
  text-transform:uppercase; font-weight:700; margin-bottom:5px; margin-top:12px;
}
.btn-delete {
  background:transparent; border:1px solid rgba(244,63,94,0.2);
  border-radius:8px; padding:7px 14px; color:var(--danger);
  font-size:0.68rem; font-weight:700; cursor:pointer;
  transition:all 0.2s; margin-top:12px; font-family:inherit;
}
.btn-delete:hover { background:rgba(244,63,94,0.06); border-color:var(--danger); }
.btn-edit {
  background:transparent; border:1px solid rgba(45,212,191,0.2);
  border-radius:8px; padding:7px 14px; color:var(--accent);
  font-size:0.72rem; cursor:pointer; letter-spacing:0.5px;
  transition:all 0.2s; margin-top:8px; font-family:inherit; width:100%;
}
.btn-edit:hover { background:rgba(45,212,191,0.06); border-color:var(--accent); }
.edit-input {
  background:var(--card); border:1px solid var(--border); border-radius:6px;
  padding:6px 8px; color:var(--text); font-size:0.75rem; font-family:inherit;
  width:100%; box-sizing:border-box;
}
.edit-input:focus { border-color:var(--accent); outline:none; }
.toast {
  position:fixed; bottom:20px; right:20px;
  background:var(--bg-card); color:var(--text);
  padding:10px 16px; border-radius:10px;
  font-weight:700; font-size:0.76rem; z-index:999;
  transform:translateY(60px); opacity:0;
  transition:all 0.35s cubic-bezier(0.34,1.56,0.64,1);
  box-shadow:0 8px 28px rgba(0,0,0,0.5);
  border:1px solid var(--border);
  border-left:3px solid var(--accent);
}
.toast.show { transform:translateY(0); opacity:1; }
input[type="date"] { min-width:0; -webkit-appearance:none; appearance:none; }
.login-screen {
  position:fixed; inset:0; background:var(--bg);
  display:flex; align-items:center; justify-content:center; z-index:500;
}
.login-card {
  text-align:center; padding:40px 32px;
  background:var(--bg-card); border:1px solid var(--border);
  border-radius:16px; max-width:360px; width:90%;
}
.btn-google {
  display:inline-flex; align-items:center; gap:10px;
  background:#fff; color:#333; border:none; border-radius:10px;
  padding:12px 24px; font-size:0.82rem; font-weight:700;
  cursor:pointer; transition:all 0.2s; font-family:inherit;
  box-shadow:0 2px 12px rgba(0,0,0,0.2);
}
.btn-google:hover { transform:translateY(-1px); box-shadow:0 4px 20px rgba(0,0,0,0.3); }
.login-divider {
  display:flex; align-items:center; gap:12px; margin:16px 0;
  color:var(--text-muted); font-size:0.68rem; letter-spacing:1px; text-transform:uppercase;
}
.login-divider::before,.login-divider::after {
  content:''; flex:1; height:1px; background:var(--border);
}
.login-input {
  width:100%; background:var(--bg-input); border:1px solid var(--border);
  border-radius:8px; padding:10px 12px; color:var(--text);
  font-family:inherit; font-size:0.82rem; outline:none;
  transition:all 0.2s; margin-bottom:8px;
}
.login-input:focus { border-color:var(--accent); box-shadow:0 0 0 2px var(--accent-glow); }
.login-input::placeholder { color:var(--text-muted); }
.btn-email {
  width:100%; background:var(--gradient); border:none; border-radius:10px;
  padding:11px; color:#080d13; font-size:0.8rem; font-weight:800;
  letter-spacing:1px; cursor:pointer; transition:all 0.2s; font-family:inherit;
}
.btn-email:hover { transform:translateY(-1px); box-shadow:0 4px 20px rgba(45,212,191,0.2); }
.login-toggle {
  background:none; border:none; color:var(--accent); font-size:0.72rem;
  cursor:pointer; margin-top:12px; font-family:inherit; opacity:0.8;
}
.login-toggle:hover { opacity:1; }
.user-menu { display:flex; align-items:center; gap:6px; }
.user-avatar { width:28px; height:28px; border-radius:50%; border:2px solid var(--accent); }
@media(max-width:600px) {
  .form-grid { grid-template-columns:1fr; }
  .header-inner { flex-wrap:wrap; }
  .header-stats { gap:5px; }
  .stat { padding:4px 7px; }
  .stat-num { font-size:0.9rem; }
  .dive-card { grid-template-columns:auto 1fr; }
  .dive-depth-col { display:none; }
  .modal-stats { grid-template-columns:1fr 1fr; }
  .shop-categories { grid-template-columns:1fr 1fr; }
  .card { padding:16px 14px; }
  .container { padding:14px 12px 60px; }
  input, select, textarea { font-size:16px; max-width:100%; }
  .depth-display { max-width:100%; overflow:hidden; }
}