/* ============================================================
   LOGIN - MODERN UI
   Avícola Los Cambulos - Control de Ventas
   Coherente con el Design System del Dashboard Operativo
   ============================================================ */

/* --- VARIABLES --- */
:root {
  --login-bg: #f1f5f9;
  --login-surface: #ffffff;
  --login-border: rgba(148,163,184,0.2);
  --login-shadow: 0 1px 3px rgba(15,23,42,0.04), 0 4px 16px rgba(15,23,42,0.06);
  --login-shadow-hover: 0 8px 32px rgba(15,23,42,0.1);
  --login-primary: #6366f1;
  --login-primary-hover: #4f46e5;
  --login-primary-light: rgba(99,102,241,0.08);
  --login-primary-glow: rgba(99,102,241,0.35);
  --login-emerald: #10b981;
  --login-amber: #f59e0b;
  --login-rose: #ef4444;
  --login-text: #0f172a;
  --login-text-secondary: #64748b;
  --login-text-muted: #94a3b8;
  --login-radius: 16px;
  --login-radius-sm: 10px;
  --login-radius-xs: 6px;
  --login-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  scroll-behavior: smooth;
}

/* --- BASE --- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: var(--login-font);
  background: var(--login-bg);
  color: var(--login-text);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

a {
  color: var(--login-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--login-primary-hover);
}

/* --- LAYOUT --- */
.login-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1.5rem;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

/* --- LOGO --- */
.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2rem;
  text-decoration: none;
}

.login-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

.login-logo__text {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--login-text);
  white-space: nowrap;
}

/* --- CARD --- */
.login-card {
  background: var(--login-surface);
  border: 1px solid var(--login-border);
  border-radius: var(--login-radius);
  box-shadow: var(--login-shadow);
  padding: 2.5rem 2rem 2rem;
  position: relative;
  overflow: hidden;
  transition: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.login-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--login-primary), #8b5cf6, var(--login-primary));
  border-radius: var(--login-radius) var(--login-radius) 0 0;
}

.login-card:hover {
  box-shadow: var(--login-shadow-hover);
}

/* --- HEADER --- */
.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-header__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--login-primary-light);
  color: var(--login-primary);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.login-header__title {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--login-text);
}

.login-header__subtitle {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
  color: var(--login-text-secondary);
  font-weight: 400;
}

/* --- FORM --- */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.login-field__label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--login-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.login-field__input-wrap {
  position: relative;
}

.login-field__icon {
  position: absolute;
  left: 0.9rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--login-text-muted);
  font-size: 1.1rem;
  pointer-events: none;
  transition: color 0.2s ease;
}

.login-field__input {
  width: 100%;
  padding: 0.7rem 0.9rem 0.7rem 2.6rem;
  font-size: 0.9rem;
  font-family: var(--login-font);
  color: var(--login-text);
  background: var(--login-bg);
  border: 1.5px solid var(--login-border);
  border-radius: var(--login-radius-sm);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.login-field__input::placeholder {
  color: var(--login-text-muted);
  font-weight: 400;
}

.login-field__input:hover {
  border-color: rgba(148,163,184,0.4);
}

.login-field__input:focus {
  border-color: var(--login-primary);
  box-shadow: 0 0 0 3px var(--login-primary-glow);
  background: var(--login-surface);
}

.login-field__input:focus ~ .login-field__icon {
  color: var(--login-primary);
}

/* Toggle password visibility */
.login-field__toggle-pw {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 0.2rem;
  color: var(--login-text-muted);
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  transition: color 0.2s ease;
}

.login-field__toggle-pw:hover {
  color: var(--login-text-secondary);
}

/* Validation */
.login-field__input.is-invalid {
  border-color: var(--login-rose);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.15);
}

.login-field__error {
  display: none;
  font-size: 0.75rem;
  color: var(--login-rose);
  font-weight: 500;
  margin-top: 0.15rem;
}

.login-field__input.is-invalid ~ .login-field__error {
  display: block;
}

/* --- REMEMBER ME --- */
.login-remember {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.login-remember__check {
  width: 1rem;
  height: 1rem;
  accent-color: var(--login-primary);
  border-radius: 4px;
  cursor: pointer;
}

.login-remember__label {
  font-size: 0.84rem;
  color: var(--login-text-secondary);
  cursor: pointer;
  user-select: none;
}

/* --- BUTTON --- */
.login-btn {
  width: 100%;
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: var(--login-font);
  color: #ffffff;
  background: var(--login-primary);
  border: none;
  border-radius: var(--login-radius-sm);
  cursor: pointer;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
}

.login-btn:hover {
  background: var(--login-primary-hover);
  box-shadow: 0 4px 14px var(--login-primary-glow);
  transform: translateY(-1px);
}

.login-btn:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(99,102,241,0.2);
}

.login-btn:focus-visible {
  outline: 2px solid var(--login-primary);
  outline-offset: 2px;
}

/* --- ALERTS --- */
.login-alert {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  border-radius: var(--login-radius-xs);
  font-size: 0.82rem;
  font-weight: 500;
  animation: loginFadeIn 0.3s ease;
}

.login-alert--error {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.2);
  color: #dc2626;
}

.login-alert--error i {
  font-size: 1rem;
  flex-shrink: 0;
}

.login-alert--warning {
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.2);
  color: #b45309;
}

.login-alert--warning i {
  font-size: 1rem;
  flex-shrink: 0;
}

.login-alert--empty {
  display: none;
}

/* --- FOOTER --- */
.login-footer {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.78rem;
  color: var(--login-text-muted);
}

.login-footer a {
  color: var(--login-text-secondary);
  font-weight: 500;
  transition: color 0.2s ease;
}

.login-footer a:hover {
  color: var(--login-primary);
}

/* --- DECORATIVE ELEMENTS --- */
.login-bg-decoration {
  position: fixed;
  pointer-events: none;
  z-index: -1;
}

.login-bg-decoration--top {
  top: -120px;
  right: -80px;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,0.06) 0%, transparent 70%);
}

.login-bg-decoration--bottom {
  bottom: -150px;
  left: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.05) 0%, transparent 70%);
}

/* --- ANIMATIONS --- */
@keyframes loginFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes loginSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-card {
  animation: loginSlideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.login-logo {
  animation: loginFadeIn 0.4s ease 0.1s both;
}

/* --- RESPONSIVE --- */
@media (max-width: 480px) {
  .login-wrapper {
    padding: 1rem;
    align-items: flex-start;
    padding-top: 2.5rem;
  }

  .login-card {
    padding: 2rem 1.5rem 1.5rem;
    border-radius: 14px;
  }

  .login-header__title {
    font-size: 1.2rem;
  }

  .login-logo__text {
    font-size: 0.95rem;
  }

  .login-logo img {
    height: 44px;
  }

  .login-bg-decoration {
    display: none;
  }
}

@media (max-width: 360px) {
  .login-card {
    padding: 1.5rem 1.25rem 1.25rem;
  }
}

/* --- BACK TO TOP (legacy support) --- */
.back-to-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 99999;
  background: var(--login-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--login-radius-xs);
  transition: all 0.3s ease;
}

.back-to-top i {
  font-size: 24px;
  color: #fff;
  line-height: 0;
}

.back-to-top:hover {
  background: var(--login-primary-hover);
  color: #fff;
}

.back-to-top.active {
  visibility: visible;
  opacity: 1;
}