/* ===========================
   PILATESOFT — MAIN CSS
   =========================== */

/* === VARIABLES === */
:root {
  --primary:       #5B4FCF;
  --primary-dark:  #4940b5;
  --primary-light: #ede9ff;
  --bg:            #f0f2f7;
  --sidebar-bg:    #ffffff;
  --card-bg:       #ffffff;
  --text-main:     #1a1a2e;
  --text-muted:    #6b7280;
  --border:        #e5e7eb;
  --success:       #22c55e;
  --success-bg:    #f0fdf4;
  --danger:        #ef4444;
  --danger-bg:     #fef2f2;
  --warning:       #f59e0b;
  --warning-bg:    #fffbeb;
  --radius:        16px;
  --radius-sm:     8px;
  --shadow:        0 2px 12px rgba(0,0,0,0.06);
  --shadow-md:     0 4px 24px rgba(0,0,0,0.10);
  --sidebar-width: 240px;
}

/* === RESET === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; }
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

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

/* === SIDEBAR === */
.sidebar {
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0;
  height: 100vh;
  z-index: 100;
  transition: transform 0.3s ease;
  overflow-y: auto;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo-icon {
  width: 36px; height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px;
  flex-shrink: 0;
}

.sidebar-logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.sidebar-logo-name { font-weight: 700; font-size: 15px; color: var(--text-main); }
.sidebar-logo-sub  { font-size: 11px; color: var(--text-muted); }

.sidebar-nav { flex: 1; padding: 16px 0; }

.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 20px;
  border-radius: var(--radius-sm);
  margin: 2px 12px;
  font-size: 14px; font-weight: 500;
  color: var(--text-muted);
  transition: all 0.15s;
}
.sidebar-nav a:hover { background: var(--primary-light); color: var(--primary); }
.sidebar-nav a.active { background: var(--primary); color: #fff; }

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px;
}
.sidebar-footer-info { flex: 1; min-width: 0; }
.sidebar-footer-name {
  font-weight: 600; font-size: 13px; color: var(--text-main);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.sidebar-footer-role {
  font-size: 10px; color: var(--primary);
  font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
}
.sidebar-footer .logout-btn {
  background: none; border: none;
  color: var(--text-muted);
  padding: 6px;
  border-radius: 6px;
  transition: all 0.15s;
  display: flex; align-items: center;
}
.sidebar-footer .logout-btn:hover { background: var(--danger-bg); color: var(--danger); }

/* === MAIN CONTENT === */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  padding: 32px;
  min-height: 100vh;
}

/* === PAGE HEADER === */
.page-header { margin-bottom: 28px; }
.page-header h1 { font-size: 28px; font-weight: 700; color: var(--text-main); margin-bottom: 4px; }
.page-header .subtitle { font-size: 14px; color: var(--text-muted); }

.page-header-row {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px; margin-bottom: 28px;
}
.page-header-row h1 { font-size: 28px; font-weight: 700; color: var(--text-main); margin-bottom: 4px; }

/* === CARDS === */
.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.card-title {
  font-size: 16px; font-weight: 700; color: var(--text-main);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 8px;
}

/* === KPI CARDS === */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}
.kpi-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 24px;
  display: flex; align-items: center; gap: 16px;
}
.kpi-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 22px;
}
.kpi-icon.blue   { background: #eff6ff; }
.kpi-icon.purple { background: var(--primary-light); }
.kpi-icon.orange { background: #fff7ed; }
.kpi-icon.green  { background: #f0fdf4; }
.kpi-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 4px; }
.kpi-value { font-size: 26px; font-weight: 800; color: var(--text-main); line-height: 1; }

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  border: none; cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-primary   { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger    { background: #fce4ec; color: #c62828; }
.btn-danger:hover { background: #f8bbd0; }
.btn-secondary { background: var(--bg); color: var(--text-main); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-sm   { padding: 6px 14px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }

/* === BADGES === */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12px; font-weight: 600;
}
.badge-success { background: var(--success-bg); color: #16a34a; }
.badge-danger  { background: var(--danger-bg);  color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: #d97706; }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-neutral { background: #f3f4f6; color: #6b7280; }

/* === AVATAR === */
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
  color: #fff; flex-shrink: 0;
}
.avatar-lg { width: 44px; height: 44px; font-size: 16px; }

/* === FORMS === */
.form-group { margin-bottom: 16px; }
.form-label {
  display: block; font-size: 12px; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.5px; margin-bottom: 6px;
}
.form-control {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px; color: var(--text-main);
  background: #fff; transition: border-color 0.15s; outline: none;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(91,79,207,0.1); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* === SEARCH === */
.search-bar { position: relative; margin-bottom: 20px; }
.search-bar input {
  width: 100%; padding: 12px 16px 12px 44px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; outline: none; background: #fff; transition: border-color 0.15s;
}
.search-bar input:focus { border-color: var(--primary); }
.search-icon {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); pointer-events: none;
}

/* === ALUMNOS TABLE === */
.alumnos-table-header {
  display: grid; grid-template-columns: 2fr 2fr 1fr 1fr;
  padding: 10px 16px;
  font-size: 11px; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
}
.alumno-row {
  display: grid; grid-template-columns: 2fr 2fr 1fr 1fr;
  padding: 14px 16px; align-items: center;
  border-bottom: 1px solid var(--border);
  cursor: pointer; transition: background 0.12s; border-radius: 8px;
}
.alumno-row:hover { background: var(--bg); }
.alumno-row:last-child { border-bottom: none; }
.alumno-info { display: flex; align-items: center; gap: 12px; }
.saldo-positivo { color: #16a34a; font-weight: 700; }
.saldo-negativo { color: var(--danger); font-weight: 700; }
.saldo-cero     { color: var(--text-muted); font-weight: 700; }

/* === MODALS === */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  padding: 16px;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%; max-width: 480px;
  max-height: 90vh; overflow-y: auto;
  transform: translateY(20px); transition: transform 0.2s;
}
.modal-overlay.open .modal { transform: translateY(0); }
.modal-lg { max-width: 640px; }
.modal-header {
  padding: 20px 24px 0;
  display: flex; align-items: center; justify-content: space-between;
}
.modal-title { font-size: 18px; font-weight: 700; color: var(--text-main); }
.modal-close {
  background: none; border: none; font-size: 20px;
  color: var(--text-muted); cursor: pointer;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px; transition: all 0.15s;
}
.modal-close:hover { background: var(--bg); }
.modal-body { padding: 20px 24px 24px; }
.modal-footer {
  padding: 16px 24px; border-top: 1px solid var(--border);
  display: flex; gap: 10px; justify-content: flex-end;
}

/* === TOAST === */
.toast-container {
  position: fixed; bottom: 24px; right: 24px;
  z-index: 9999;
  display: flex; flex-direction: column; gap: 8px;
  max-width: 360px;
}
.toast {
  background: #fff; border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  padding: 14px 16px;
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 500;
  animation: slideIn 0.3s ease;
  border-left: 4px solid var(--primary);
}
.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--danger); }
.toast.warning { border-left-color: var(--warning); }
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}
@keyframes slideOut {
  from { transform: translateX(0); opacity: 1; }
  to   { transform: translateX(100%); opacity: 0; }
}
.toast.removing { animation: slideOut 0.3s ease forwards; }

/* === CLASE ITEMS (dashboard) === */
.clase-item {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.clase-item:last-child { border-bottom: none; }
.clase-color-bar { width: 4px; height: 44px; border-radius: 4px; flex-shrink: 0; }
.clase-info { flex: 1; }
.clase-nombre { font-weight: 700; font-size: 15px; }
.clase-meta { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.clase-actions { display: flex; align-items: center; gap: 8px; }

/* === ACCIONES RÁPIDAS === */
.quick-actions { background: var(--primary); border-radius: var(--radius); padding: 20px; }
.quick-actions-title { color: #fff; font-weight: 700; font-size: 16px; margin-bottom: 16px; }
.quick-actions-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.quick-action-btn {
  background: rgba(255,255,255,0.15);
  border: 1.5px solid rgba(255,255,255,0.3);
  color: #fff; border-radius: var(--radius-sm);
  padding: 12px; font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all 0.15s;
  display: flex; align-items: center; gap: 8px;
  text-align: left;
}
.quick-action-btn:hover { background: rgba(255,255,255,0.25); }

/* === TOP ALUMNOS === */
.top-alumno-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--border);
  cursor: pointer; transition: all 0.12s; border-radius: 8px;
}
.top-alumno-item:last-child { border-bottom: none; }
.top-alumno-item:hover { background: var(--bg); padding-left: 8px; }
.top-alumno-rank {
  width: 28px; height: 28px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; flex-shrink: 0;
}
.rank-1 { background: #ffd700; color: #7a5f00; }
.rank-2 { background: #e0e0e0; color: #555; }
.rank-3 { background: #cd7f32; color: #fff; }
.top-alumno-info { flex: 1; }
.top-alumno-name { font-weight: 600; font-size: 14px; }
.top-alumno-meta { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }

/* === TWO-COL LAYOUT === */
.two-col { display: grid; grid-template-columns: 380px 1fr; gap: 24px; align-items: start; }

/* === AGENDA / DAY TABS === */
.day-tabs { display: flex; gap: 4px; margin-bottom: 20px; flex-wrap: wrap; }
.day-tab {
  padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600; cursor: pointer;
  border: 1.5px solid var(--border); background: #fff;
  color: var(--text-muted); transition: all 0.15s;
}
.day-tab:hover { border-color: var(--primary); color: var(--primary); }
.day-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.horario-card {
  display: flex; align-items: center; gap: 14px;
  background: var(--bg); border-radius: var(--radius-sm);
  padding: 12px 14px; margin-bottom: 10px; transition: box-shadow 0.15s;
}
.horario-card:hover { box-shadow: var(--shadow); }
.horario-info { flex: 1; }
.horario-nombre { font-weight: 700; font-size: 14px; }
.horario-meta { font-size: 12px; color: var(--text-muted); }
.horario-delete {
  background: none; border: none; color: var(--text-muted);
  font-size: 18px; cursor: pointer; width: 28px; height: 28px;
  border-radius: 6px; display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.horario-delete:hover { background: var(--danger-bg); color: var(--danger); }

/* === PROGRESS BAR === */
.progress-bar-wrap { margin-bottom: 20px; }
.progress-bar-label {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 6px; font-size: 14px; font-weight: 600;
}
.progress-bar-track { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.progress-bar-fill { height: 100%; border-radius: 4px; background: var(--primary); transition: width 0.4s; }
.progress-bar-fill.full { background: var(--danger); }
.progress-meta { font-size: 12px; color: var(--text-muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

/* === BAR CHART === */
.bar-chart { display: flex; align-items: flex-end; gap: 8px; height: 100px; margin-top: 12px; }
.bar-chart-col { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; height: 100%; justify-content: flex-end; }
.bar-chart-bar { width: 100%; background: #bfdbfe; border-radius: 4px 4px 0 0; transition: height 0.4s; min-height: 4px; }
.bar-chart-label { font-size: 11px; color: var(--text-muted); font-weight: 500; }

/* === ALUMNO PORTAL === */
.day-selector {
  display: flex; gap: 8px; overflow-x: auto; padding-bottom: 4px;
  scrollbar-width: none; margin-bottom: 24px;
}
.day-selector::-webkit-scrollbar { display: none; }
.day-btn {
  flex-shrink: 0; width: 56px; padding: 10px 0;
  border-radius: var(--radius-sm); text-align: center;
  cursor: pointer; border: 1.5px solid var(--border);
  background: #fff; color: var(--text-muted); transition: all 0.15s;
}
.day-btn:hover { border-color: var(--primary); color: var(--primary); }
.day-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.day-btn .day-abbrev { font-size: 11px; font-weight: 500; }
.day-btn .day-num { font-size: 18px; font-weight: 800; line-height: 1.1; }

.clase-card-alumno {
  background: var(--card-bg); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px;
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 12px; transition: box-shadow 0.15s;
}
.clase-card-alumno:hover { box-shadow: var(--shadow-md); }
.clase-card-body { flex: 1; }
.clase-card-nombre { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.clase-card-meta { font-size: 13px; color: var(--text-muted); margin-top: 4px; display: flex; flex-direction: column; gap: 2px; }
.clase-card-alert { font-size: 12px; color: #d97706; font-weight: 600; margin-top: 6px; }
.clase-card-actions { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; flex-shrink: 0; }

/* === LOGIN PAGE === */
.login-page {
  min-height: 100vh; background: var(--bg);
  display: flex; align-items: center; justify-content: center; padding: 16px;
}
.login-card {
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow-md); padding: 40px;
  width: 100%; max-width: 420px;
}
.login-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 32px; justify-content: center; }
.login-logo-icon {
  width: 44px; height: 44px; background: var(--primary); color: #fff;
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 22px;
}
.login-logo-name { font-size: 22px; font-weight: 800; color: var(--text-main); }
.login-title { text-align: center; font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.login-subtitle { text-align: center; color: var(--text-muted); font-size: 14px; margin-bottom: 28px; }
.login-remember { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-muted); margin-bottom: 20px; cursor: pointer; }
.login-error {
  background: var(--danger-bg); color: var(--danger);
  border: 1px solid #fca5a5; border-radius: var(--radius-sm);
  padding: 12px; font-size: 14px; margin-bottom: 16px; text-align: center;
}

/* === ASISTENCIA === */
.asistencia-list { list-style: none; }
.asistencia-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--border);
}
.asistencia-item:last-child { border-bottom: none; }
.asistencia-checkbox { width: 20px; height: 20px; accent-color: var(--primary); cursor: pointer; flex-shrink: 0; }

/* === HISTORIAL === */
.historial-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 0; border-bottom: 1px solid var(--border); font-size: 14px;
}
.historial-item:last-child { border-bottom: none; }

/* === DASHBOARD LAYOUT === */
.dashboard-grid { display: grid; grid-template-columns: 1fr 320px; gap: 24px; align-items: start; }
.dashboard-left  { display: flex; flex-direction: column; gap: 24px; }
.dashboard-right { display: flex; flex-direction: column; gap: 24px; }

/* === HAMBURGER === */
.hamburger {
  display: none;
  position: fixed; top: 16px; left: 16px; z-index: 200;
  background: #fff; border: 1.5px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px;
  cursor: pointer; box-shadow: var(--shadow);
  align-items: center;
}

/* === CANCELACIONES === */
.cancelaciones-num { font-size: 48px; font-weight: 800; color: var(--danger); line-height: 1; margin-bottom: 4px; }
.cancelaciones-label { font-size: 12px; color: var(--text-muted); text-transform: uppercase; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 12px; }
.cancelaciones-alert { background: var(--danger-bg); border-radius: var(--radius-sm); padding: 12px; font-size: 13px; color: var(--danger); }

/* === MINI CARDS (alumno) === */
.alumno-info-cards { display: flex; gap: 12px; margin-bottom: 24px; flex-wrap: wrap; }
.info-mini-card {
  background: var(--card-bg); border-radius: var(--radius-sm);
  box-shadow: var(--shadow); padding: 14px 20px;
  display: flex; align-items: center; gap: 10px; min-width: 140px;
}
.info-mini-card-icon { font-size: 20px; }
.info-mini-card-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; font-weight: 600; }
.info-mini-card-value { font-size: 16px; font-weight: 800; color: var(--text-main); }

/* === SIDEBAR OVERLAY (mobile) === */
.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.4); z-index: 99;
}
.sidebar-overlay.show { display: block; }

/* === CLASES HEADER === */
.clases-disponibles-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px;
}
.disponibles-badge {
  background: var(--primary-light); color: var(--primary);
  padding: 4px 12px; border-radius: 20px;
  font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px;
}

/* === MISC === */
.section-title {
  font-size: 13px; font-weight: 700; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 16px;
  display: flex; align-items: center; justify-content: space-between;
}
.section-title a { font-size: 12px; color: var(--primary); text-transform: none; letter-spacing: 0; font-weight: 600; }
.empty-state { text-align: center; padding: 32px; color: var(--text-muted); }
.empty-state-icon { font-size: 36px; margin-bottom: 12px; }
.empty-state-text { font-size: 14px; }
.color-preview { width: 32px; height: 32px; border-radius: var(--radius-sm); border: 2px solid var(--border); }
.wallet-row { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.wallet-row:last-child { border-bottom: none; }
.wallet-monto-positivo { color: var(--success); font-weight: 700; }
.wallet-monto-negativo { color: var(--danger); font-weight: 700; }

/* === RESPONSIVE === */
@media (max-width: 1200px) {
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 1024px) {
  .two-col { grid-template-columns: 1fr; }
  .dashboard-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 80px 16px 24px; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .alumnos-table-header { display: none; }
  .alumno-row { grid-template-columns: 1fr 1fr; gap: 8px; }
  .modal { max-width: 100%; }
  .form-row { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .main-content { padding: 70px 12px 16px; }
}