/* assets/css/login.css */

/* --- CSS Variables for Theming --- */
:root,
[data-bs-theme="light"] {
  --body-bg: #f0f2f5;
  --card-bg: #ffffff;
  --card-border-color: rgba(0, 0, 0, 0.1);
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --text-color: #212529;
  --input-bg: #f8f9fa;
  --input-border: #ced4da;
  --input-focus-bg: #ffffff;
  --input-focus-border: #86b7fe;
  --input-invalid-bg: #fff5f5;
  --placeholder-color: #6c757d;
  --link-color: #0d6efd;
  --link-hover-color: #0a58ca;
  --modal-bg: #ffffff;
  --modal-text: #212529;
  --btn-close-filter: none;
}

[data-bs-theme="dark"] {
  --body-bg: #121212;
  --card-bg: #1e1e1e;
  --card-border-color: rgba(255, 255, 255, 0.1);
  --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --text-color: #f8f9fa;
  --input-bg: #2a2a2a;
  --input-border: rgba(255, 255, 255, 0.15);
  --input-focus-bg: #343434;
  --input-focus-border: rgba(13, 110, 253, 0.5);
  --input-invalid-bg: #382525;
  --placeholder-color: #a0a0a0;
  --link-color: #58a6ff;
  --link-hover-color: #80b6f8;
  --modal-bg: #2c3e50;
  --modal-text: #f8f9fa;
  --btn-close-filter: invert(1) grayscale(100%) brightness(200%);
}

body {
  background: var(--body-bg);
  background-attachment: fixed;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  overflow-x: hidden;
  transition: background 0.5s ease;
}

/* --- Theme Toggle Button --- */
.theme-toggle-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1050;
}
#theme-toggle {
  background-color: var(--card-bg);
  color: var(--text-color);
  border: 1px solid var(--card-border-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--card-shadow);
}

/* --- Modern Login Card --- */
.login-card {
  background: var(--card-bg);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--card-border-color);
  padding: 2.5rem;
  width: 100%;
  max-width: 450px;
  color: var(--text-color);
  transition: background 0.3s ease, border 0.3s ease;
}

.logo {
  max-width: 120px;
  height: auto;
}

/* --- Form Elements Styling --- */
.input-wrapper {
  position: relative;
}

.form-icon {
  position: absolute;
  /* This calculation centers the icon relative to the input field's height, not the wrapper's */
  top: calc((1.5em + 1rem + 2px) / 2);
  left: 1rem;
  transform: translateY(-50%);
  color: var(--placeholder-color);
  z-index: 3;
  transition: color 0.2s ease-in-out;
}

.input-wrapper .form-control {
  background-color: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 0.5rem;
  color: var(--text-color);
  box-shadow: none;
  transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out,
    box-shadow 0.2s ease-in-out;
  padding-left: 2.75rem;
  height: calc(1.5em + 1rem + 2px);
}

.form-control::placeholder {
  color: var(--placeholder-color);
  opacity: 1;
}

/* --- Professional Focus State --- */
.input-wrapper .form-control:focus {
  border-color: var(--input-focus-border);
  box-shadow: inset 0 0 0 1px var(--input-focus-border); /* Subtle inner glow */
  background-color: var(--input-focus-bg);
  position: relative;
  z-index: 2;
}
.input-wrapper .form-control:focus ~ .form-icon {
  color: var(--link-color);
}

/* --- Professional Validation States --- */
/* Change icon color on validation */
.was-validated .form-control:invalid ~ .form-icon,
.form-control.is-invalid ~ .form-icon {
  color: var(--bs-danger);
}
.was-validated .form-control:valid ~ .form-icon,
.form-control.is-valid ~ .form-icon {
  color: var(--bs-success);
}

/* Style invalid input field */
.was-validated .form-control:invalid,
.form-control.is-invalid {
  background-image: none;
  background-color: var(--input-invalid-bg);
}
.was-validated .form-control:invalid:focus,
.form-control.is-invalid:focus {
  background-color: var(--input-invalid-bg);
  box-shadow: inset 0 0 0 1px var(--bs-danger);
}

/* Animate the feedback message */
.invalid-feedback {
  display: block;
  width: 100%;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  margin-top: 0;
  padding-left: 0.25rem;
  transition: opacity 0.3s ease, max-height 0.3s ease, margin-top 0.3s ease;
}
.was-validated .form-control:invalid ~ .invalid-feedback {
  opacity: 1;
  max-height: 2rem;
  margin-top: 0.25rem;
}

/* --- Button and Links --- */
.btn-login {
  border-radius: 50px;
  padding: 12px 20px;
  font-weight: bold;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: none;
  background-image: linear-gradient(45deg, #0d6efd, #0dcaf0);
  background-size: 200% auto;
}

.btn-login:hover {
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(0, 123, 255, 0.3);
  background-position: right center;
}

.support-link {
  font-size: 0.9em;
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.support-link:hover {
  color: var(--link-hover-color);
  text-decoration: underline;
}

/* --- Modal Styling --- */
.modal-content {
  background-color: var(--modal-bg);
  color: var(--modal-text);
  border: none;
  border-radius: 15px;
}
.modal-header,
.modal-footer {
  border-color: var(--card-border-color);
}
.btn-close {
  filter: var(--btn-close-filter);
}

/* --- Offline Banner --- */
#offline-banner {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: #dc3545;
  color: white;
  text-align: center;
  padding: 8px;
  z-index: 9999;
  font-size: 0.9rem;
  font-weight: 500;
  animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

/* --- Register Link Section --- */
.register-link-container {
  padding-top: 20px;
  margin-top: 20px;
  border-top: 1px solid var(--card-border-color);
  transition: border-color 0.3s ease;
}

.register-link-container p {
  margin-bottom: 0;
  font-size: 0.9em;
}

.register-link-container a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.register-link-container a:hover {
  color: var(--link-hover-color);
  text-decoration: underline;
}