/* Variables CSS comunes */
:root {
  --bg: #050816;
  --bg-alt: #0f172a;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.1);
  --accent-strong: rgba(34, 197, 94, 0.18);
  --danger: #ef4444;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border-subtle: rgba(148, 163, 184, 0.4);
  --radius-lg: 18px;
  --radius-md: 999px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.75);
  --shadow-pill: 0 10px 30px rgba(15, 23, 42, 0.65);
}

/* Reset básico */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Inter", sans-serif;
  background: radial-gradient(circle at top, #1d2538 0, #050816 52%, #020617 100%);
  color: var(--text);
  padding: 24px 16px;
}

/* Layout containers */
.shell {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.container {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
}

/* Card común */
.card {
  background: linear-gradient(140deg, rgba(15,23,42,0.96), rgba(15,23,42,0.94));
  border-radius: 24px;
  padding: 20px 20px 18px;
  box-shadow: var(--shadow-soft);
  border: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: -80%;
  background:
    radial-gradient(circle at 0% 0%, rgba(56, 189, 248, 0.04), transparent 50%),
    radial-gradient(circle at 100% 0%, rgba(34, 197, 94, 0.08), transparent 52%),
    radial-gradient(circle at 0% 100%, rgba(129, 140, 248, 0.06), transparent 55%);
  pointer-events: none;
  opacity: 0.85;
}

.card-inner {
  position: relative;
  z-index: 1;
}

/* Header común */
.header {
  text-align: center;
  margin-bottom: 24px;
}

.header h1 {
  margin: 0 0 8px;
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
}

.header p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

/* Botones comunes */
.btn {
  border: none;
  border-radius: 999px;
  padding: 9px 14px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  cursor: pointer;
  background: rgba(15, 23, 42, 0.96);
  color: #e5e7eb;
  border: 1px solid rgba(148, 163, 184, 0.8);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.86);
  transition: transform 0.08s ease-out, box-shadow 0.08s ease-out, background 0.08s ease-out, border-color 0.08s ease-out;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: rgba(245, 245, 245, 0.85);
  background: rgba(15, 23, 42, 0.98);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.95);
}

.btn:active {
  transform: translateY(0);
  box-shadow: 0 10px 26px rgba(15, 23, 42, 0.95);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.9);
  border-style: dashed;
  border-color: rgba(148, 163, 184, 0.7);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--accent-soft);
}

.btn-danger {
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.8);
  background: radial-gradient(circle at top left, rgba(248, 113, 113, 0.25), rgba(15, 23, 42, 0.98));
}

.btn-sm {
  padding: 7px 12px;
  font-size: 0.72rem;
}

.btn-icon {
  font-size: 0.9rem;
}

/* Botón principal (accent) - usado en login, change-password */
.btn-primary,
.btn[type="submit"] {
  background: var(--accent);
  color: #050816;
  font-weight: 600;
  border: none;
}

.btn-primary:hover:not(:disabled),
.btn[type="submit"]:hover:not(:disabled) {
  filter: brightness(1.05);
}

/* Formularios comunes */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.95);
  color: var(--text);
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
}

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.form-row .form-group {
  flex: 1;
  min-width: 140px;
}

/* Mensajes de error/success */
.error-msg {
  color: var(--danger);
  font-size: 0.9rem;
  margin-top: 12px;
  text-align: center;
  min-height: 20px;
}

.success-msg {
  color: var(--accent);
  font-size: 0.9rem;
  margin-top: 12px;
  text-align: center;
}

/* Links */
.links {
  margin-top: 20px;
  text-align: center;
  font-size: 0.9rem;
}

.links a {
  color: var(--accent);
  text-decoration: none;
}

.links a:hover {
  text-decoration: underline;
}

.nav {
  margin-bottom: 20px;
}

.nav a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 16px;
}

.nav a:hover {
  text-decoration: underline;
}

/* Badge común */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
}

/* Tabla común */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
}

th {
  color: var(--muted);
  font-weight: 500;
}

/* Loading/error común */
.loading {
  text-align: center;
  color: var(--muted);
  padding: 20px;
}

.hidden {
  display: none !important;
}