/* ══════════════════════════════════════
   SISTEMA DE USUARIOS — AUTH
══════════════════════════════════════ */

/* Botón de usuario en el hero */
.auth-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  letter-spacing: 0.03em;
}

.auth-btn-login {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.20);
  color: #C8CDD8;
}

.auth-btn-login:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.auth-btn-user {
  background: rgba(245, 197, 24, 0.08);
  border: 1px solid rgba(245, 197, 24, 0.25);
  color: var(--color-accent);
  position: relative;
}

.auth-btn-user:hover {
  background: rgba(245, 197, 24, 0.15);
}

.auth-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent2), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

/* Dropdown usuario */
.user-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 8px;
  min-width: 200px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  z-index: 200;
  display: none;
}

.user-dropdown.open {
  display: block;
}

.user-dropdown-header {
  padding: 10px 12px 12px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 6px;
}

.user-dropdown-name {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
}

.user-dropdown-email {
  font-size: 0.72rem;
  color: var(--color-muted);
  margin-top: 2px;
}

.user-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--color-muted);
  cursor: pointer;
  transition: all 0.15s;
  border: none;
  background: transparent;
  width: 100%;
  text-align: left;
  font-family: inherit;
}

.user-dropdown-item:hover {
  background: rgba(232, 131, 42, 0.06);
  color: var(--color-text);
}

.user-dropdown-item.danger:hover {
  background: rgba(239, 68, 68, 0.08);
  color: #ef4444;
}

/* Modal de auth */
.auth-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.auth-overlay.open {
  display: flex;
}

.auth-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 18px;
  width: 100%;
  max-width: 420px;
  max-height: calc(100vh - 40px);
  position: relative;
  overflow: hidden;
  overflow-y: auto;
}

.auth-modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent2), var(--color-accent));
}

.auth-modal-header {
  padding: 28px 28px 0;
  text-align: center;
}

.auth-modal-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  margin: 0 auto 16px;
  background: #0A0A0F;
  border: 1px solid rgba(245, 197, 24, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: 0 0 24px rgba(245, 197, 24, 0.20);
}

.auth-modal-title {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--color-text);
  margin: 0 0 6px;
}

.auth-modal-sub {
  font-size: 0.82rem;
  color: var(--color-muted);
  margin: 0;
}

/* Tabs login/registro */
.auth-tabs {
  display: flex;
  margin: 20px 28px 0;
  border-radius: 10px;
  background: var(--color-surface2);
  padding: 4px;
  gap: 4px;
}

.auth-tab {
  flex: 1;
  padding: 8px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--color-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
}

.auth-tab.active {
  background: var(--color-surface);
  color: var(--color-accent);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.auth-body {
  padding: 20px 28px 28px;
}

/* Panel login / registro */
.auth-panel {
  display: none;
}

.auth-panel.active {
  display: block;
}

/* Google button */
.auth-google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface2);
  color: var(--color-text);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  margin-bottom: 16px;
}

.auth-google-btn:hover {
  border-color: rgba(232, 131, 42, 0.4);
  background: rgba(232, 131, 42, 0.04);
}

.auth-google-icon {
  width: 20px;
  height: 20px;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.auth-divider span {
  font-size: 0.72rem;
  color: var(--color-muted);
  white-space: nowrap;
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 12px;
}

.auth-field label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.auth-field input {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--color-text);
  font-size: 0.88rem;
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s;
}

.auth-field input:focus {
  border-color: var(--color-accent);
}

.auth-submit {
  width: 100%;
  padding: 12px;
  margin-top: 8px;
  background: linear-gradient(135deg, var(--color-accent2), var(--color-accent));
  border: none;
  border-radius: 10px;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.2s, transform 0.2s;
  letter-spacing: 0.04em;
}

.auth-submit:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.auth-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.auth-msg {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.8rem;
  display: none;
}

.auth-msg.error {
  background: rgba(239, 68, 68, 0.1);
  color: #ef4444;
  border: 1px solid rgba(239, 68, 68, 0.2);
  display: block;
}

.auth-msg.success {
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.2);
  display: block;
}

/* Banner de bienvenida cuando está logueado */
.auth-welcome-bar {
  display: none;
  background: linear-gradient(135deg, rgba(245, 197, 24, 0.06), rgba(232, 131, 42, 0.04));
  border: 1px solid rgba(245, 197, 24, 0.2);
  border-radius: 10px;
  padding: 12px 18px;
  margin-bottom: 16px;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.auth-welcome-bar.visible {
  display: flex;
}

.auth-welcome-bar span {
  font-size: 0.85rem;
  color: var(--color-text);
}

.auth-welcome-bar strong {
  color: var(--color-accent);
}

.auth-sync-badge {
  margin-left: auto;
  font-size: 0.68rem;
  padding: 3px 10px;
  background: rgba(34, 197, 94, 0.1);
  color: #22c55e;
  border: 1px solid rgba(34, 197, 94, 0.25);
  border-radius: 999px;
}

/* ── MODALES RECURSOS ── */
.recurso-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.recurso-overlay.open {
  display: flex;
}

.recurso-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  width: 100%;
  max-width: 780px;
  max-height: 88vh;
  overflow-y: auto;
  position: relative;
}

.recurso-modal::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent2), var(--color-accent));
  border-radius: 16px 16px 0 0;
}

.rm-header {
  padding: 24px 24px 16px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 2;
}

.rm-header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.rm-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.rm-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 4px;
}

.rm-subtitle {
  font-size: 0.78rem;
  color: var(--color-muted);
  margin: 0;
}

.rm-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-muted);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
}

.rm-close:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.rm-body {
  padding: 24px;
}

/* Tabla de ampacidades */
.amp-table-wrap {
  overflow-x: auto;
}

.amp-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.amp-table th {
  background: var(--color-surface2);
  color: var(--color-accent);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 10px 14px;
  text-align: center;
  border: 1px solid var(--color-border);
}

.amp-table td {
  padding: 9px 14px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  text-align: center;
}

.amp-table tr:hover td {
  background: rgba(232, 131, 42, 0.05);
}

.amp-table .col-sec {
  font-weight: 700;
  color: var(--color-accent);
}

.amp-note {
  font-size: 0.75rem;
  color: var(--color-muted);
  margin-top: 14px;
  padding: 10px 14px;
  background: rgba(245, 197, 24, 0.05);
  border-radius: 8px;
  border-left: 3px solid var(--color-accent);
}

/* Calculadora */
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

@media (max-width: 500px) {
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.calc-field label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-muted);
}

.calc-field input,
.calc-field select {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 9px 12px;
  color: var(--color-text);
  font-size: 0.88rem;
  outline: none;
  font-family: inherit;
  transition: border-color 0.2s;
}

.calc-field input:focus,
.calc-field select:focus {
  border-color: var(--color-accent);
}

.calc-field select option {
  background: var(--color-surface2);
}

.calc-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  background: linear-gradient(135deg, var(--color-accent2), var(--color-accent));
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
  font-family: inherit;
}

.calc-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.calc-result {
  display: none;
  margin-top: 18px;
  padding: 18px 20px;
  background: rgba(245, 197, 24, 0.07);
  border: 1px solid rgba(245, 197, 24, 0.25);
  border-radius: 10px;
}

.calc-result.show {
  display: block;
}

.calc-result-val {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
}

.calc-result-label {
  font-size: 0.78rem;
  color: var(--color-muted);
  margin-top: 4px;
}

.calc-result-detail {
  margin-top: 10px;
  font-size: 0.8rem;
  color: #94a3b8;
  line-height: 1.6;
}

/* Simbología */
.simb-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

.simb-card {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px;
  text-align: center;
  transition: border-color 0.2s;
}

.simb-card:hover {
  border-color: rgba(232, 131, 42, 0.3);
}

.simb-svg {
  width: 60px;
  height: 60px;
  margin: 0 auto 8px;
  display: block;
}

.simb-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 3px;
}

.simb-norm {
  font-size: 0.65rem;
  color: var(--color-muted);
}

/* Resumen NCh4 */
.nch4-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.nch4-item {
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 18px;
}

.nch4-item h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-accent);
  margin: 0 0 6px;
}

.nch4-item p {
  font-size: 0.8rem;
  color: #94a3b8;
  margin: 0;
  line-height: 1.55;
}

/* Formulario TE1 */
.te1-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.te1-step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--color-surface2);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 14px 16px;
}

.te1-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--color-accent2), var(--color-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 800;
  color: #fff;
}

.te1-step h4 {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 4px;
}

.te1-step p {
  font-size: 0.78rem;
  color: #94a3b8;
  margin: 0;
  line-height: 1.5;
}

/* Protecciones */
.prot-section-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin: 18px 0 10px;
}

.prot-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-bottom: 16px;
}

.prot-table th {
  background: var(--color-surface2);
  color: var(--color-muted);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  text-align: left;
}

.prot-table td {
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.prot-table tr:hover td {
  background: rgba(232, 131, 42, 0.04);
}

/* ══════════════════════════════════════
   MODAL UPGRADE — Plan Pro
══════════════════════════════════════ */

.upgrade-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  z-index: 3000;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
}

.upgrade-overlay.open {
  display: flex;
}

.upgrade-modal {
  position: relative;
  background: #1A1A26;
  border: 1px solid rgba(245, 197, 24, 0.25);
  border-radius: 16px;
  padding: 36px 32px 28px;
  max-width: 400px;
  width: calc(100% - 32px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.7), 0 0 60px rgba(245, 197, 24, 0.06);
  text-align: center;
}

.upgrade-modal::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, #F5C518 50%, transparent);
}

.upgrade-modal-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.upgrade-modal-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 900;
  font-size: 1.5rem;
  color: #F5C518;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 10px;
}

.upgrade-modal-desc {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.55;
  margin: 0 0 24px;
}

.upgrade-modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.upgrade-btn-primary {
  background: #F5C518;
  color: #0A0A0F;
  border: none;
  border-radius: 8px;
  padding: 11px 22px;
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}

.upgrade-btn-primary:hover {
  background: #FFD740;
  transform: translateY(-1px);
}

.upgrade-btn-secondary {
  background: transparent;
  color: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  padding: 11px 18px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.upgrade-btn-secondary:hover {
  color: rgba(255, 255, 255, 0.85);
  border-color: rgba(255, 255, 255, 0.3);
}

.upgrade-modal-close {
  position: absolute;
  top: 12px; right: 14px;
  background: none;
  border: none;
  color: rgba(255, 255, 255, 0.35);
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px 6px;
  transition: color 0.2s;
}

.upgrade-modal-close:hover {
  color: rgba(255, 255, 255, 0.7);
}