/* ============================================================
   FitCoach Pro — Estilos principales
   ============================================================ */

:root {
  --primary:       #2563eb;
  --primary-dark:  #1d4ed8;
  --primary-light: #eff6ff;
  --secondary:     #7c3aed;
  --success:       #16a34a;
  --warning:       #d97706;
  --danger:        #dc2626;
  --info:          #0891b2;
  --gray-50:       #f8fafc;
  --gray-100:      #f1f5f9;
  --gray-200:      #e2e8f0;
  --gray-300:      #cbd5e1;
  --gray-400:      #94a3b8;
  --gray-500:      #64748b;
  --gray-600:      #475569;
  --gray-700:      #334155;
  --gray-800:      #1e293b;
  --gray-900:      #0f172a;
  --sidebar-w:     260px;
  --header-h:      64px;
  --radius:        10px;
  --radius-lg:     16px;
  --shadow-sm:     0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.05);
  --shadow:        0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.05);
  --shadow-lg:     0 10px 15px rgba(0,0,0,.08), 0 4px 6px rgba(0,0,0,.05);
  --transition:    .2s ease;
}

/* ── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: .9375rem;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--gray-100);
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout principal ───────────────────────────────────────── */
.app-wrapper { display: flex; min-height: 100vh; }

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--gray-900);
  color: #fff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform var(--transition);
  overflow-y: auto;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 20px 20px 16px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-brand .brand-icon {
  width: 38px; height: 38px;
  background: var(--primary);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.sidebar-brand .brand-name { font-weight: 700; font-size: 1rem; letter-spacing: -.3px; }
.sidebar-brand .brand-sub  { font-size: .7rem; color: var(--gray-400); }

.sidebar-nav { padding: 12px 0; flex: 1; }
.nav-section-label {
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--gray-500);
  padding: 16px 20px 6px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  color: var(--gray-300);
  font-size: .875rem;
  font-weight: 500;
  border-radius: 0;
  transition: background var(--transition), color var(--transition);
  position: relative;
  cursor: pointer;
  text-decoration: none;
}
.nav-item:hover  { background: rgba(255,255,255,.06); color: #fff; text-decoration: none; }
.nav-item.active { background: var(--primary); color: #fff; }
.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: #fff;
  border-radius: 0 3px 3px 0;
}
.nav-item .nav-icon { font-size: 1.1rem; width: 20px; text-align: center; flex-shrink: 0; }
.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: .65rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 20px;
  min-width: 18px;
  text-align: center;
}
.sidebar-footer {
  padding: 12px 20px 20px;
  border-top: 1px solid rgba(255,255,255,.08);
}
.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-user .user-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-size: .85rem;
  flex-shrink: 0;
  overflow: hidden;
}
.sidebar-user .user-avatar img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-user .user-name  { font-size: .85rem; font-weight: 600; color: #fff; }
.sidebar-user .user-role  { font-size: .72rem; color: var(--gray-400); }

/* ── Contenido principal ────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ── Header ─────────────────────────────────────────────────── */
.topbar {
  height: var(--header-h);
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}
.topbar-title { font-weight: 700; font-size: 1.05rem; color: var(--gray-800); flex: 1; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }
.btn-icon {
  width: 38px; height: 38px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  color: var(--gray-600);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: background var(--transition);
  position: relative;
  text-decoration: none;
}
.btn-icon:hover { background: var(--gray-200); color: var(--gray-800); text-decoration: none; }
.notif-dot {
  position: absolute;
  top: 4px; right: 4px;
  width: 8px; height: 8px;
  background: var(--danger);
  border-radius: 50%;
  border: 2px solid #fff;
}

/* ── Page content ───────────────────────────────────────────── */
.page-content { padding: 28px; flex: 1; }
.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 1.5rem; font-weight: 700; color: var(--gray-900); }
.page-header p  { color: var(--gray-500); margin-top: 4px; font-size: .9rem; }
.breadcrumb { display: flex; gap: 6px; align-items: center; font-size: .8rem; color: var(--gray-500); margin-bottom: 8px; }
.breadcrumb a { color: var(--gray-500); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { color: var(--gray-300); }

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}
.card-header {
  padding: 18px 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.card-header h2 { font-size: 1rem; font-weight: 600; color: var(--gray-800); }
.card-body  { padding: 20px 22px; }
.card-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--gray-100);
  background: var(--gray-50);
}

/* Stat cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.stat-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: flex-start;
  gap: 14px;
  box-shadow: var(--shadow-sm);
}
.stat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.stat-icon.blue    { background: #eff6ff; color: var(--primary); }
.stat-icon.purple  { background: #f5f3ff; color: var(--secondary); }
.stat-icon.green   { background: #f0fdf4; color: var(--success); }
.stat-icon.amber   { background: #fffbeb; color: var(--warning); }
.stat-icon.red     { background: #fef2f2; color: var(--danger); }
.stat-icon.cyan    { background: #ecfeff; color: var(--info); }
.stat-label { font-size: .78rem; font-weight: 500; color: var(--gray-500); margin-bottom: 4px; text-transform: uppercase; letter-spacing: .04em; }
.stat-value { font-size: 1.7rem; font-weight: 700; color: var(--gray-900); line-height: 1; }
.stat-sub   { font-size: .78rem; color: var(--gray-400); margin-top: 4px; }
.stat-change { font-size: .78rem; font-weight: 600; }
.stat-change.up   { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: 8px;
  font-size: .875rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}
.btn:hover { opacity: .88; transform: translateY(-1px); text-decoration: none; }
.btn:active { transform: translateY(0); }
.btn-primary   { background: var(--primary);   color: #fff; }
.btn-secondary { background: var(--gray-600);  color: #fff; }
.btn-success   { background: var(--success);   color: #fff; }
.btn-danger    { background: var(--danger);    color: #fff; }
.btn-warning   { background: var(--warning);   color: #fff; }
.btn-outline   { background: transparent; border: 1.5px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { background: var(--gray-100); }
.btn-sm { padding: 6px 13px; font-size: .8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* ── Forms ──────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: .83rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-label .required { color: var(--danger); margin-left: 3px; }
.form-control {
  width: 100%;
  padding: 9px 13px;
  border: 1.5px solid var(--gray-300);
  border-radius: 8px;
  font-size: .9rem;
  color: var(--gray-800);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
}
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-control.is-invalid { border-color: var(--danger); }
.form-hint { font-size: .78rem; color: var(--gray-400); margin-top: 5px; }
.form-error { font-size: .78rem; color: var(--danger); margin-top: 5px; font-weight: 500; }
.input-group { display: flex; }
.input-group .form-control { border-radius: 8px 0 0 8px; }
.input-group .input-addon {
  padding: 9px 13px;
  background: var(--gray-100);
  border: 1.5px solid var(--gray-300);
  border-left: none;
  border-radius: 0 8px 8px 0;
  font-size: .85rem;
  color: var(--gray-500);
  white-space: nowrap;
  display: flex;
  align-items: center;
}
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.form-section-title {
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--gray-500);
  padding: 14px 0 8px;
  border-bottom: 1px solid var(--gray-100);
  margin-bottom: 16px;
}
select.form-control { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
textarea.form-control { resize: vertical; min-height: 80px; }

/* ── Tables ──────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
thead th {
  background: var(--gray-50);
  color: var(--gray-500);
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  padding: 11px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
tbody td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--gray-100);
  color: var(--gray-700);
  font-size: .875rem;
  vertical-align: middle;
}
tbody tr:hover { background: var(--gray-50); }
tbody tr:last-child td { border-bottom: none; }

/* ── Badges ──────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.badge-primary { background: #eff6ff; color: var(--primary); }
.badge-success { background: #f0fdf4; color: var(--success); }
.badge-warning { background: #fffbeb; color: var(--warning); }
.badge-danger  { background: #fef2f2; color: var(--danger); }
.badge-info    { background: #ecfeff; color: var(--info); }
.badge-gray    { background: var(--gray-100); color: var(--gray-600); }
.badge-purple  { background: #f5f3ff; color: var(--secondary); }

/* ── Alerts / Flash ──────────────────────────────────────────── */
.alert {
  padding: 13px 16px;
  border-radius: 10px;
  font-size: .875rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 20px;
  border: 1px solid transparent;
}
.alert-success { background: #f0fdf4; color: #15803d; border-color: #bbf7d0; }
.alert-danger  { background: #fef2f2; color: #b91c1c; border-color: #fecaca; }
.alert-warning { background: #fffbeb; color: #b45309; border-color: #fde68a; }
.alert-info    { background: #ecfeff; color: #0e7490; border-color: #a5f3fc; }

/* ── Avatar ──────────────────────────────────────────────────── */
.avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  color: #fff;
  font-size: .85rem;
  flex-shrink: 0;
  overflow: hidden;
}
.avatar-lg { width: 72px; height: 72px; font-size: 1.4rem; }
.avatar-sm { width: 30px; height: 30px; font-size: .7rem; }

/* ── Progress bars ───────────────────────────────────────────── */
.progress { background: var(--gray-200); border-radius: 20px; height: 8px; overflow: hidden; }
.progress-bar { height: 100%; border-radius: 20px; background: var(--primary); transition: width .6s ease; }
.progress-bar.success { background: var(--success); }
.progress-bar.warning { background: var(--warning); }
.progress-bar.danger  { background: var(--danger); }

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs { display: flex; border-bottom: 2px solid var(--gray-200); gap: 0; margin-bottom: 24px; }
.tab-btn {
  padding: 10px 20px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
}
.tab-btn:hover  { color: var(--primary); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ── Chart container ─────────────────────────────────────────── */
.chart-wrapper { position: relative; width: 100%; }

/* ── Modals ──────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: #fff;
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px);
  transition: transform var(--transition);
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-header {
  padding: 20px 24px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.modal-header h3 { font-size: 1.05rem; font-weight: 700; }
.modal-body   { padding: 20px 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--gray-100); display: flex; gap: 10px; justify-content: flex-end; }

/* ── Login page ──────────────────────────────────────────────── */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--gray-900) 0%, #1e1b4b 100%);
  padding: 20px;
}
.login-card {
  background: #fff;
  border-radius: 20px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 25px 50px rgba(0,0,0,.3);
}
.login-logo {
  text-align: center;
  margin-bottom: 28px;
}
.login-logo .logo-icon {
  width: 60px; height: 60px;
  background: var(--primary);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
  font-size: 1.8rem;
}
.login-logo h1 { font-size: 1.4rem; font-weight: 800; color: var(--gray-900); }
.login-logo p  { font-size: .85rem; color: var(--gray-500); margin-top: 4px; }

/* ── Athlete profile card ────────────────────────────────────── */
.profile-hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-lg);
  padding: 28px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 24px;
}
.profile-hero .profile-name { font-size: 1.4rem; font-weight: 700; }
.profile-hero .profile-meta { font-size: .85rem; opacity: .8; margin-top: 4px; }

/* ── Day plan card ───────────────────────────────────────────── */
.day-card {
  border: 1.5px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 12px;
  transition: box-shadow var(--transition);
}
.day-card:hover { box-shadow: var(--shadow); }
.day-card-header {
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}
.day-card-header.gym  { background: linear-gradient(90deg, #eff6ff, #fff); border-left: 4px solid var(--primary); }
.day-card-header.home { background: linear-gradient(90deg, #f0fdf4, #fff); border-left: 4px solid var(--success); }
.day-card-body { padding: 0 18px 16px; display: none; }
.day-card-body.open { display: block; }
.day-num {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800;
  font-size: .9rem;
  flex-shrink: 0;
}
.day-num.gym  { background: var(--primary);  color: #fff; }
.day-num.home { background: var(--success);   color: #fff; }

/* ── Exercise table inside plan ─────────────────────────────── */
.ex-table { width: 100%; font-size: .83rem; }
.ex-table th { background: var(--gray-50); color: var(--gray-500); font-size: .72rem; text-transform: uppercase; padding: 8px 12px; }
.ex-table td { padding: 9px 12px; border-bottom: 1px solid var(--gray-100); }
.ex-table tr:last-child td { border-bottom: none; }

/* ── Chart empty state ───────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--gray-400);
}
.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; opacity: .4; }
.empty-state p { font-size: .9rem; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .page-content { padding: 16px; }
  .form-row { grid-template-columns: 1fr; }
  .topbar { padding: 0 16px; }
  .menu-toggle { display: flex !important; }
}
.menu-toggle { display: none; }

/* ── Utilities ───────────────────────────────────────────────── */
.d-flex   { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.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-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-sm   { font-size: .8rem; }
.text-muted { color: var(--gray-400); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-bold { font-weight: 700; }
.w-full { width: 100%; }
.hidden { display: none; }