/* ===================================================================
   Navaja Suiza — hoja de estilos principal
   =================================================================== */

/* ----- Reset ----- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ----- Variables globales ----- */
:root {
  --color-accent:       #c0392b;
  --color-accent-hover: #a93226;
  --color-bg:           #f2f2f2;
  --color-surface:      #ffffff;
  --color-text:         #1a1a1a;
  --color-text-muted:   #6b6b6b;
  --color-border:       #e0e0e0;
  --color-locked-bg:    #fafafa;
  --color-error-bg:     rgba(192, 57, 43, 0.08);

  --shadow-sm:          0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-card:        0 2px 8px rgba(0, 0, 0, 0.09);
  --shadow-card-hover:  0 8px 24px rgba(0, 0, 0, 0.14);

  --radius:     12px;
  --radius-sm:  8px;
  --transition: 200ms ease;
  --max-width:  1100px;

  --font: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

/* ----- Base ----- */
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* ===================================================================
   HEADER
   =================================================================== */
.site-header {
  background: var(--color-surface);
  border-bottom: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  letter-spacing: -0.01em;
}

.site-logo__accent { color: var(--color-accent); }

.header-auth {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-email {
  font-size: 0.83rem;
  color: var(--color-text-muted);
}

.btn-logout {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  padding: 0.35rem 0.85rem;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition);
  font-family: var(--font);
}

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

/* ===================================================================
   MAIN / LAYOUT
   =================================================================== */
main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

.page-subtitle {
  color: var(--color-text-muted);
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

/* ===================================================================
   TOOLS GRID
   =================================================================== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

/* ===================================================================
   CARDS
   =================================================================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem;
  cursor: pointer;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  user-select: none;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
}

/* Tarjeta bloqueada */
.card--locked {
  background: var(--color-locked-bg);
}

.card--locked:hover {
  border-color: var(--color-border);
  transform: none;
  box-shadow: var(--shadow-card);
}

.card__icon {
  font-size: 2.4rem;
  line-height: 1;
}

.card__name {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 0.2rem;
}

.card__desc {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  line-height: 1.45;
}

/* Overlay de candado (visible al hacer hover en tarjeta bloqueada) */
.card__lock-overlay {
  position: absolute;
  inset: 0;
  background: rgba(242, 242, 242, 0.88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  backdrop-filter: blur(3px);
  opacity: 0;
  transition: opacity var(--transition);
}

.card--locked:hover .card__lock-overlay {
  opacity: 1;
}

.card__lock-icon { font-size: 2rem; }

.card__lock-text {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  text-align: center;
  padding: 1.5rem;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ===================================================================
   LOGIN PAGE
   =================================================================== */
body.login-page {
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.login-container {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.login-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.login-logo__accent { color: var(--color-accent); }

.auth-form {
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.auth-form h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-group input {
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}

.error-msg {
  font-size: 0.85rem;
  color: var(--color-accent);
  background: var(--color-error-bg);
  padding: 0.65rem 0.85rem;
  border-radius: 6px;
  border-left: 3px solid var(--color-accent);
  line-height: 1.4;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  border: none;
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  font-family: var(--font);
  transition: background var(--transition);
  width: 100%;
}

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

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

/* ===================================================================
   RESPONSIVE
   =================================================================== */
@media (max-width: 600px) {
  .site-header { padding: 0 1rem; }
  .user-email  { display: none; }

  main { padding: 1.5rem 1rem; }

  .tools-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
  }

  body.login-page { padding: 1rem; }
  .auth-form { padding: 1.5rem; }
}