/* ============================================
   TRUNO - Login Module CSS
   Módulo independiente sin dependencias
   ============================================ */

/* === ROOT VARIABLES === */
:root {
  /* Colors - Dark Theme */
  --bg-primary: #0a0e14;
  --bg-secondary: #111820;
  --bg-tertiary: #1a2332;
  --bg-card: #151c28;
  --bg-input: #1e2738;
  --bg-hover: #252f3f;
  
  /* Brand Colors */
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-primary-light: #3b82f6;
  --brand-secondary: #0ea5e9;
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-placeholder: #475569;
  
  /* Status Colors */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.1);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.1);
  --error: #ef4444;
  --error-bg: rgba(239, 68, 68, 0.1);
  --info: #3b82f6;
  
  /* Borders */
  --border-color: #2d3748;
  --border-light: #374151;
  --border-focus: var(--brand-primary);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.3);
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

input,
button,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* === LOGIN LAYOUT === */
.login-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-content {
  width: 100%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
}

/* === LOGO === */
.login-logo {
  width: 80px;
  height: 80px;
  background: var(--brand-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
}

.login-logo svg {
  width: 48px;
  height: 48px;
  color: var(--text-primary);
}

/* === HEADER === */
.login-header {
  text-align: center;
}

.login-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.login-subtitle {
  font-size: var(--font-size-md);
  color: var(--text-secondary);
}

/* === FORM === */
.login-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* === FORM GROUPS === */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--text-secondary);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: var(--spacing-md);
  width: 20px;
  height: 20px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition-fast);
}

.form-input {
  width: 100%;
  height: 56px;
  padding: 0 var(--spacing-md) 0 52px;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-md);
  transition: all var(--transition-fast);
}

.form-input::placeholder {
  color: var(--text-placeholder);
}

.form-input:hover {
  border-color: var(--border-light);
}

.form-input:focus {
  outline: none;
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
}

.form-input:focus + .input-icon,
.input-wrapper:focus-within .input-icon {
  color: var(--brand-primary);
}

/* Password Toggle */
.password-toggle {
  position: absolute;
  right: var(--spacing-md);
  width: 24px;
  height: 24px;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.password-toggle:hover {
  color: var(--text-secondary);
}

.form-input[type="password"] ~ .password-toggle .icon-eye-off,
.form-input[type="text"] ~ .password-toggle .icon-eye {
  display: none;
}

/* Forgot Password */
.forgot-password {
  align-self: flex-end;
  margin-top: calc(-1 * var(--spacing-sm));
}

.forgot-password a {
  font-size: var(--font-size-sm);
  color: var(--brand-primary-light);
  transition: color var(--transition-fast);
}

.forgot-password a:hover {
  color: var(--brand-primary);
  text-decoration: underline;
}

/* === BUTTONS === */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  height: 56px;
  padding: 0 var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--brand-primary);
  color: var(--text-primary);
}

.btn-primary:hover {
  background: var(--brand-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
}

.btn svg {
  width: 20px;
  height: 20px;
}

/* Loading State */
.btn.loading {
  pointer-events: none;
  position: relative;
}

.btn.loading .btn-text {
  visibility: hidden;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* === DIVIDER === */
.login-divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  width: 100%;
  color: var(--text-muted);
  font-size: var(--font-size-sm);
}

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

/* === FOOTER === */
.login-footer {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.login-footer a {
  color: var(--brand-primary-light);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
}

.login-footer a:hover {
  color: var(--brand-primary);
  text-decoration: underline;
}

/* === SECURITY BADGE === */
.security-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.security-badge svg {
  width: 16px;
  height: 16px;
  color: var(--brand-secondary);
}

/* === ERROR MESSAGE === */
.form-error {
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background: var(--error-bg);
  border: 1px solid var(--error);
  border-radius: var(--radius-md);
  color: var(--error);
  font-size: var(--font-size-sm);
}

.form-error.visible {
  display: flex;
}

.form-error svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* === INPUT ERROR STATE === */
.form-input.error {
  border-color: var(--error);
}

.form-input.error:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

/* === RESPONSIVE === */
@media (max-width: 480px) {
  .login-container {
    padding: var(--spacing-md);
  }
  
  .login-logo {
    width: 72px;
    height: 72px;
  }
  
  .login-logo svg {
    width: 40px;
    height: 40px;
  }
  
  .login-title {
    font-size: var(--font-size-xl);
  }
  
  .form-input,
  .btn {
    height: 52px;
  }
}

@media (min-width: 768px) {
  .login-content {
    padding: var(--spacing-2xl);
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
  }
}

@media (min-width: 1024px) {
  .login-container {
    background: 
      radial-gradient(ellipse at 20% 30%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
      radial-gradient(ellipse at 80% 70%, rgba(14, 165, 233, 0.08) 0%, transparent 50%),
      linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  }
}

/* === ANIMATIONS === */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.login-content {
  animation: fadeIn 0.4s ease-out;
}

/* === UTILITY CLASSES === */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}