/* CSS Variables for Themes */
:root {
  --bg-color: #f8f9fa;
  --text-color: #222;
  --header-bg: #ffffff;
  --card-bg: #ffffff;
  --btn-bg: #007bff;
  --btn-hover-bg: #0056b3;
  --delete-btn-bg: #dc3545;
  --delete-btn-hover-bg: #a71d2a;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --border: #eee;
  --modal-bg: rgba(0, 0, 0, 0.6);
  --toast-bg: #333;
  --toast-text: #fff;
  --skeleton-bg: #e0e0e0;
  --skeleton-shine: #f5f5f5;
}

body.dark-theme {
  --bg-color: #1a1a1a;
  --text-color: #e0e0e0;
  --header-bg: #2c2c2c;
  --card-bg: #2c2c2c;
  --btn-bg: #1e90ff;
  --btn-hover-bg: #4682b4;
  --delete-btn-bg: #ff4d4d;
  --delete-btn-hover-bg: #cc3333;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
  --border: #444;
  --modal-bg: rgba(0, 0, 0, 0.8);
  --toast-bg: #555;
  --toast-text: #fff;
  --skeleton-bg: #444;
  --skeleton-shine: #555;
}

/* RESET & BASICS */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s, color 0.3s;
}

.wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* HEADER */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 30px;
  background: var(--header-bg);
  box-shadow: var(--shadow);
}

.logo {
  width: 50px;
  height: 50px;
}

h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

/* CENTER CONTAINER */
.center-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 30px;
  text-align: center;
}

/* EMAIL BOX */
.email-box {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 20px;
  background: var(--card-bg);
  padding: 15px;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

#tempEmail {
  font-weight: 600;
  font-size: 1.1rem;
  padding: 8px 12px;
  border-radius: 6px;
  background: var(--card-bg);
  color: var(--text-color);
}

.action-buttons {
  display: flex;
  gap: 10px;
}

/* BUTTONS */
.action-btn {
  padding: 10px;
  background: var(--btn-bg);
  border: none;
  color: white;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s ease, transform 0.1s;
}

.action-btn:hover {
  background: var(--btn-hover-bg);
  transform: translateY(-2px);
}

.action-btn.delete {
  background: var(--delete-btn-bg);
}

.action-btn.delete:hover {
  background: var(--delete-btn-hover-bg);
}

.theme-btn {
  background: var(--btn-bg);
}

.theme-btn:hover {
  background: var(--btn-hover-bg);
}

.tagline {
  margin: 15px 0;
  font-size: 1rem;
  color: var(--text-color);
  opacity: 0.8;
}

/* INBOX */
.inbox {
  width: 100%;
  max-width: 700px;
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  min-height: 150px;
  animation: fadeIn 0.5s ease;
}

.message-item {
  display: flex;
  align-items: center;
  padding: 15px;
  margin-bottom: 10px;
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.message-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.15);
}

.message-item strong {
  color: var(--text-color);
  flex: 1;
  font-weight: 500;
}

.message-item small {
  color: var(--text-color);
  opacity: 0.7;
  font-size: 0.85rem;
}

/* SKELETON LOADING */
.skeleton {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.skeleton-item {
  background: var(--skeleton-bg);
  border-radius: 8px;
  height: 60px;
  position: relative;
  overflow: hidden;
}

.skeleton-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--skeleton-shine), transparent);
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* MODAL */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--modal-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-bg);
  padding: 25px;
  border-radius: 12px;
  width: 90%;
  max-width: 700px;
  color: var(--text-color);
}

.modal-content .close {
  float: right;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
}

/* TOAST */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: var(--toast-bg);
  color: var(--toast-text);
  padding: 12px 20px;
  border-radius: 8px;
  opacity: 0;
  transition: all 0.3s ease;
  z-index: 9999;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* FOOTER */
footer {
  background: var(--header-bg);
  padding: 15px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-color);
}

footer a {
  color: var(--btn-bg);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

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

/* RESPONSIVE */
@media (max-width: 600px) {
  header {
    flex-direction: column;
    gap: 10px;
  }
  .email-box {
    flex-direction: column;
    align-items: center;
  }
  .action-buttons {
    flex-wrap: wrap;
    justify-content: center;
  }
}