/* =============================================
   DIVING SKILLS — Full Design System
   ============================================= */

/* ---- CSS Variables ---- */
:root {
  --bg-primary:    #0f0f0f;
  --bg-surface:    #1a1a1a;
  --bg-surface-2:  #242424;
  --border:        #2e2e2e;
  --text-primary:  #f0f0f0;
  --text-secondary:#a0a0a0;
  --accent:        #00c9a7;
  --accent-hover:  #00b596;
  --accent-dim:    rgba(0, 201, 167, 0.12);
  --pending:       #f5a623;
  --pending-dim:   rgba(245, 166, 35, 0.12);
  --danger:        #e05252;
  --danger-dim:    rgba(224, 82, 82, 0.12);

  --nav-width:          240px;
  --nav-bottom-height:  62px;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;

  --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.45);
  --transition:  all 0.18s ease;

  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
}

/* =============================================
   RESET
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: var(--font); }
button { cursor: pointer; }
ul { list-style: none; }

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1 { font-size: 1.75rem; font-weight: 700; line-height: 1.2; }
h2 { font-size: 1.375rem; font-weight: 600; line-height: 1.3; }
h3 { font-size: 1.1rem; font-weight: 600; }
h4 { font-size: 0.95rem; font-weight: 600; }

.text-sm  { font-size: 0.875rem; }
.text-xs  { font-size: 0.75rem; }
.text-secondary { color: var(--text-secondary); }
.text-accent    { color: var(--accent); }
.text-pending   { color: var(--pending); }
.text-danger    { color: var(--danger); }

/* =============================================
   LAYOUT
   ============================================= */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  min-height: 100vh;
  padding: 24px 20px;
  padding-bottom: calc(var(--nav-bottom-height) + 28px);
  max-width: 100%;
  overflow-x: hidden;
}

@media (min-width: 768px) {
  .main-content {
    margin-left: var(--nav-width);
    padding: 36px 40px;
    padding-bottom: 36px;
    max-width: calc(100vw - var(--nav-width));
  }
}

.page-header {
  margin-bottom: 28px;
}
.page-header h1 { font-size: 1.5rem; margin-bottom: 4px; }
.page-header p  { color: var(--text-secondary); font-size: 0.875rem; }

.content-section { margin-bottom: 32px; }
.section-title {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

/* =============================================
   SIDEBAR (desktop)
   ============================================= */
.sidebar {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
}
@media (min-width: 768px) { .sidebar { display: flex; } }

.sidebar-brand {
  padding: 22px 20px 18px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.4px;
}
.brand-name span { color: var(--accent); }
.brand-tagline {
  font-size: 0.65rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.9px;
  margin-top: 2px;
}

.sidebar-nav { flex: 1; padding: 10px 0; }

.nav-section-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-secondary);
  padding: 14px 20px 4px;
  opacity: 0.55;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 20px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  text-decoration: none;
  position: relative;
}
.nav-item:hover { color: var(--text-primary); background: var(--bg-surface-2); text-decoration: none; }
.nav-item.active {
  color: var(--accent);
  background: var(--accent-dim);
}
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--accent);
  border-radius: 0 2px 2px 0;
}
.nav-item .nav-icon {
  font-size: 1.05rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.user-info-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.avatar-sm {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  overflow: hidden;
}
.avatar-sm img { width: 100%; height: 100%; object-fit: cover; }
.user-name-nav {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.user-role-nav {
  font-size: 0.68rem;
  color: var(--text-secondary);
  text-transform: capitalize;
}

/* =============================================
   BOTTOM NAV (mobile)
   ============================================= */
.bottom-nav {
  display: flex;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--nav-bottom-height);
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  z-index: 100;
  padding: 0 4px;
  padding-bottom: env(safe-area-inset-bottom, 0);
}
@media (min-width: 768px) { .bottom-nav { display: none; } }

.bottom-nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-secondary);
  font-size: 0.6rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  border: none;
  background: none;
  padding: 8px 2px;
}
.bottom-nav-item:hover,
.bottom-nav-item.active { color: var(--accent); text-decoration: none; }
.bottom-nav-item .nav-icon { font-size: 1.25rem; line-height: 1; }

/* =============================================
   CARDS
   ============================================= */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
}
.card-sm { padding: 14px 16px; }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}
.card-title    { font-size: 0.95rem; font-weight: 600; }
.card-subtitle { font-size: 0.78rem; color: var(--text-secondary); margin-top: 2px; }

.card-grid   { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 500px)  { .card-grid   { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px)  { .card-grid-3 { grid-template-columns: repeat(3, 1fr); } }

/* Stat card */
.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
}
.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.2;
}
.btn:hover { text-decoration: none; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: #000; }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); color: #000; }

.btn-secondary { background: var(--bg-surface-2); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover:not(:disabled) { background: var(--border); color: var(--text-primary); }

.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid var(--border); }
.btn-ghost:hover:not(:disabled) { background: var(--bg-surface-2); color: var(--text-primary); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { background: #c94040; }

.btn-sm   { padding: 6px 14px; font-size: 0.78rem; }
.btn-lg   { padding: 14px 28px; font-size: 1rem; }
.btn-full { width: 100%; }
.btn-icon { padding: 9px; width: 38px; height: 38px; border-radius: var(--radius-sm); }

/* =============================================
   FORMS
   ============================================= */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-input {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.925rem;
  transition: var(--transition);
  outline: none;
}
.form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.form-input::placeholder { color: var(--text-secondary); opacity: 0.45; }
.form-input:disabled { opacity: 0.5; cursor: not-allowed; }

.form-select {
  width: 100%;
  padding: 10px 32px 10px 12px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23a0a0a0' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  transition: var(--transition);
}
.form-select:focus { border-color: var(--accent); }

.form-hint  { font-size: 0.775rem; color: var(--text-secondary); margin-top: 5px; }
.form-error { display: none; color: var(--danger); font-size: 0.78rem; margin-top: 5px; }
.form-error.visible { display: block; }

/* =============================================
   BADGES
   ============================================= */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  white-space: nowrap;
}
.badge-accent    { background: var(--accent-dim); color: var(--accent); }
.badge-pending   { background: var(--pending-dim); color: var(--pending); }
.badge-secondary { background: var(--bg-surface-2); color: var(--text-secondary); border: 1px solid var(--border); }
.badge-danger    { background: var(--danger-dim); color: var(--danger); }
.badge-level     { background: var(--bg-surface-2); color: var(--text-primary); border: 1px solid var(--border); min-width: 26px; justify-content: center; font-size: 0.7rem; }

/* =============================================
   ROLE CHIP
   ============================================= */
.role-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: capitalize;
}
.role-chip.coach  { background: rgba(88, 166, 255, 0.12); color: #58a6ff; }
.role-chip.diver  { background: var(--accent-dim); color: var(--accent); }
.role-chip.parent { background: var(--pending-dim); color: var(--pending); }

/* =============================================
   ALERTS
   ============================================= */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  display: none;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.4;
}
.alert.visible  { display: flex; }
.alert-error    { background: var(--danger-dim); border: 1px solid rgba(224,82,82,.25); color: #f07070; }
.alert-success  { background: var(--accent-dim); border: 1px solid rgba(0,201,167,.25); color: var(--accent); }
.alert-warning  { background: var(--pending-dim); border: 1px solid rgba(245,166,35,.25); color: var(--pending); }
.alert-info     { background: var(--bg-surface-2); border: 1px solid var(--border); color: var(--text-secondary); }

/* =============================================
   LOADING
   ============================================= */
.loading-spinner {
  display: inline-block;
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  flex-shrink: 0;
}
.loading-spinner-lg { width: 38px; height: 38px; border-width: 3px; }

@keyframes spin { to { transform: rotate(360deg); } }

.loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  gap: 14px;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* =============================================
   PROGRESS BAR
   ============================================= */
.progress-bar-wrap {
  background: var(--bg-surface-2);
  border-radius: 999px;
  height: 7px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.45s ease;
  min-width: 0;
}
.progress-bar-fill.partial { background: var(--pending); }

/* =============================================
   LIST ITEMS
   ============================================= */
.list-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }
.list-item-content { flex: 1; min-width: 0; }
.list-item-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.list-item-subtitle { font-size: 0.775rem; color: var(--text-secondary); margin-top: 2px; }

/* =============================================
   SKILL CARDS
   ============================================= */
.skill-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: var(--transition);
  cursor: pointer;
}
.skill-card:hover { border-color: rgba(0,201,167,0.4); background: var(--bg-surface-2); }
.skill-card.confirmed { border-left: 3px solid var(--accent); }
.skill-card.self-reported { border-left: 3px solid var(--pending); }

.skill-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 7px;
}
.skill-name { font-size: 0.9rem; font-weight: 600; line-height: 1.3; }
.skill-description { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.4; }
.skill-meta { display: flex; align-items: center; gap: 7px; margin-top: 10px; flex-wrap: wrap; }

/* =============================================
   SKILLS GRID
   ============================================= */
.skills-list { display: flex; flex-direction: column; gap: 10px; }
@media (min-width: 640px) {
  .skills-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
}
@media (min-width: 1100px) {
  .skills-list { grid-template-columns: repeat(3, 1fr); }
}

/* =============================================
   FILTER BAR
   ============================================= */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.filter-bar .form-select { width: auto; min-width: 130px; }

.search-wrap {
  position: relative;
  flex: 1;
  min-width: 180px;
}
.search-wrap .search-icon {
  position: absolute;
  left: 11px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 0.85rem;
  pointer-events: none;
}
.search-wrap .form-input { padding-left: 34px; }

/* =============================================
   MODAL
   ============================================= */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 200;
  align-items: flex-end;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.visible { display: flex; }
@media (min-width: 520px) { .modal-overlay { align-items: center; } }

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  max-height: 88vh;
  overflow-y: auto;
  animation: slideUp 0.22s ease;
}
@keyframes slideUp {
  from { transform: translateY(16px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.modal-title { font-size: 1.05rem; font-weight: 600; }
.modal-close {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--bg-surface-2);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: var(--transition);
  flex-shrink: 0;
}
.modal-close:hover { background: var(--border); color: var(--text-primary); }

/* =============================================
   AVATAR
   ============================================= */
.avatar {
  border-radius: 50%;
  background: var(--bg-surface-2);
  border: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--accent);
  overflow: hidden;
  flex-shrink: 0;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-md  { width: 56px; height: 56px; font-size: 1.2rem; }
.avatar-lg  { width: 88px; height: 88px; font-size: 2rem; border-width: 3px; }

/* =============================================
   DIVER ROW (roster)
   ============================================= */
.diver-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  transition: var(--transition);
  cursor: pointer;
  text-decoration: none;
}
.diver-row:hover { border-color: rgba(0,201,167,0.4); background: var(--bg-surface-2); text-decoration: none; }

/* =============================================
   LEVEL GRID (progress page)
   ============================================= */
.level-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.level-tab {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.level-tab:hover { border-color: var(--accent); color: var(--text-primary); }
.level-tab.active { background: var(--accent-dim); border-color: var(--accent); color: var(--accent); }
.level-tab.complete { background: var(--accent); border-color: var(--accent); color: #000; }
.level-tab.partial { background: var(--pending-dim); border-color: var(--pending); color: var(--pending); }

/* =============================================
   EMPTY STATE
   ============================================= */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 12px; opacity: 0.35; }
.empty-state p    { font-size: 0.875rem; margin-bottom: 16px; }

/* =============================================
   LOGIN PAGE
   ============================================= */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--bg-primary);
}
.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.6);
}
.login-brand { text-align: center; margin-bottom: 32px; }
.login-logo { font-size: 2.5rem; margin-bottom: 10px; }
.login-app-name {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}
.login-app-name span { color: var(--accent); }
.login-subtitle { font-size: 0.82rem; color: var(--text-secondary); margin-top: 5px; }

/* =============================================
   DIVIDER
   ============================================= */
.divider { height: 1px; background: var(--border); margin: 20px 0; }

/* =============================================
   TOAST
   ============================================= */
#toast {
  position: fixed;
  bottom: calc(var(--nav-bottom-height) + 12px);
  left: 50%;
  transform: translateX(-50%);
  padding: 11px 20px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  z-index: 999;
  box-shadow: 0 4px 24px rgba(0,0,0,0.45);
  white-space: nowrap;
  pointer-events: none;
  animation: fadeIn 0.2s ease;
}
@media (min-width: 768px) {
  #toast { bottom: 24px; }
}

/* =============================================
   UTILITY CLASSES
   ============================================= */
.flex           { display: flex; }
.flex-col       { flex-direction: column; }
.items-center   { align-items: center; }
.items-start    { align-items: flex-start; }
.justify-between{ justify-content: space-between; }
.justify-end    { justify-content: flex-end; }
.flex-1         { flex: 1; }
.flex-wrap      { flex-wrap: wrap; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-5 { gap: 20px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.hidden  { display: none !important; }
.w-full  { width: 100%; }
.min-w-0 { min-width: 0; }
.truncate { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* =============================================
   ANIMATIONS
   ============================================= */
.fade-in {
  animation: fadeIn 0.28s ease both;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* =============================================
   SCROLLBAR
   ============================================= */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }