/* ============================================
   NALA SUIT - Common Styles
   AI Code Translation Platform
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: #333;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
}

input, select, textarea {
  font-family: inherit;
  outline: none;
}

/* ---------- Typography ---------- */
h1 { font-size: 2rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 500; }

/* ---------- Utility Classes ---------- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.text-center { text-align: center; }
.w-full { width: 100%; }
.hidden { display: none !important; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.25s ease;
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.btn-success {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  color: #fff;
}

.btn-success:hover {
  background: linear-gradient(135deg, #16a34a, #15803d);
}

.btn-danger {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
}

.btn-danger:hover {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
}

.btn-warning {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  color: #fff;
}

.btn-secondary {
  background: #6b7280;
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1.5px solid #3b82f6;
  color: #3b82f6;
}

.btn-outline:hover {
  background: #3b82f6;
  color: #fff;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.btn-lg {
  padding: 0.8rem 1.6rem;
  font-size: 1rem;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
}

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: capitalize;
}

.badge-admin {
  background: #3b82f6;
  color: #fff;
}

.badge-user {
  background: #6b7280;
  color: #fff;
}

.badge-active {
  background: #22c55e;
  color: #fff;
}

.badge-inactive {
  background: #ef4444;
  color: #fff;
}

/* ---------- Form Elements ---------- */
.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #4b5563;
}

.form-control {
  width: 100%;
  padding: 0.6rem 0.9rem;
  border: 1.5px solid #d1d5db;
  border-radius: 8px;
  font-size: 0.9rem;
  background: #fff;
  color: #333;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-control::placeholder {
  color: #9ca3af;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2rem;
}

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: #fff;
  border-radius: 16px;
  padding: 1.5rem;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s ease;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #e5e7eb;
}

.modal-header h3 {
  font-size: 1.15rem;
  color: #1f2937;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f3f4f6;
  color: #6b7280;
  font-size: 1.1rem;
  transition: all 0.2s ease;
  border: none;
  cursor: pointer;
}

.modal-close:hover {
  background: #e5e7eb;
  color: #333;
}

.modal-footer {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  margin-top: 1.25rem;
  padding-top: 0.75rem;
  border-top: 1px solid #e5e7eb;
}

/* ---------- Toast Notifications ---------- */
.toast-container {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.2rem;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  min-width: 300px;
  transform: translateX(120%);
  animation: toastSlideIn 0.4s ease forwards;
  border-left: 4px solid;
}

.toast.removing {
  animation: toastSlideOut 0.3s ease forwards;
}

.toast-success { border-left-color: #22c55e; }
.toast-error { border-left-color: #ef4444; }
.toast-warning { border-left-color: #f59e0b; }
.toast-info { border-left-color: #3b82f6; }

.toast-success .toast-icon { color: #22c55e; }
.toast-error .toast-icon { color: #ef4444; }
.toast-warning .toast-icon { color: #f59e0b; }
.toast-info .toast-icon { color: #3b82f6; }

.toast-icon {
  font-size: 1.2rem;
}

.toast-message {
  flex: 1;
  font-size: 0.875rem;
  color: #374151;
}

.toast-close-btn {
  background: none;
  border: none;
  color: #9ca3af;
  cursor: pointer;
  padding: 0.25rem;
  font-size: 0.9rem;
}

.toast-close-btn:hover {
  color: #333;
}

/* ---------- Animations ---------- */
@keyframes toastSlideIn {
  from { transform: translateX(120%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes toastSlideOut {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(120%); opacity: 0; }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #c4c9d1;
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: #9ca3af;
}

/* ---------- Loading Spinner ---------- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-dark {
  border-color: rgba(0, 0, 0, 0.1);
  border-top-color: #3b82f6;
}

/* ============================================
   Starry Night background (toggleable)
   Works in any positioned container — used by
   .login-bg (index.html) and .app-bg (app.html).
   ============================================ */
.stars-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.7s ease;
}
body.starry-on .stars-layer { opacity: 1; }

.stars-layer .star {
  position: absolute;
  background: #ffffff;
  border-radius: 50%;
  will-change: opacity, transform;
  animation: starTwinkle var(--star-dur, 3s) ease-in-out infinite;
  animation-delay: var(--star-delay, 0s);
}
.stars-layer.layer-back  .star { box-shadow: 0 0 2px rgba(255,255,255,0.35); }
.stars-layer.layer-mid   .star { box-shadow: 0 0 4px rgba(255,255,255,0.55); }
.stars-layer.layer-front .star { box-shadow: 0 0 7px rgba(255,255,255,0.85); }

@keyframes starTwinkle {
  0%, 100% { opacity: 0.25; transform: scale(0.85); }
  50%      { opacity: 1;    transform: scale(1.15); }
}

@media (prefers-reduced-motion: reduce) {
  .stars-layer .star { animation: none; opacity: 0.7; }
}

.starry-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(15,23,42,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: #94a3b8;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: color 0.25s ease, transform 0.25s ease, background 0.25s ease;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35);
}
.starry-toggle:hover {
  background: rgba(30,41,59,0.95);
  transform: scale(1.06);
}
body.starry-on .starry-toggle {
  color: #fbbf24;
  box-shadow: 0 4px 16px rgba(0,0,0,0.35), 0 0 12px rgba(251,191,36,0.25);
}

[data-app-theme="light"] .stars-layer .star {
  background: #475569;
  box-shadow: 0 0 3px rgba(71,85,105,0.5);
}
[data-app-theme="light"] body.starry-on .stars-layer { opacity: 0.5; }
[data-app-theme="light"] .starry-toggle {
  background: rgba(255,255,255,0.85);
  border-color: rgba(0,0,0,0.08);
  color: #475569;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
[data-app-theme="light"] body.starry-on .starry-toggle {
  color: #d97706;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08), 0 0 12px rgba(217,119,6,0.18);
}