/* Reset basit */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body.body-gradient {
  min-height: 100vh;
  background: radial-gradient(circle at top left, #1e3a8a 0, #020617 40%, #020617 100%);
  color: #e5e7eb;
}

/* Merkez kart (login/register) */
.center-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: rgba(15, 23, 42, 0.95);
  padding: 40px 48px;
  border-radius: 24px;
  max-width: 420px;
  width: 90%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
  text-align: left;
}

.app-title {
  color: #38bdf8;
  font-size: 28px;
  margin-bottom: 8px;
  text-align: center;
}

.card h2 {
  font-size: 22px;
  margin-top: 8px;
  text-align: center;
}

.subtitle {
  color: #9ca3af;
  font-size: 14px;
  margin-top: 4px;
  margin-bottom: 24px;
  text-align: center;
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-size: 14px;
  color: #e5e7eb;
}

input[type="text"],
input[type="password"] {
  background: #020617;
  border-radius: 10px;
  border: 1px solid #1f2937;
  padding: 10px 12px;
  color: #f9fafb;
  font-size: 14px;
}

input::placeholder {
  color: #6b7280;
}

input:focus {
  outline: none;
  border-color: #38bdf8;
  box-shadow: 0 0 0 1px #38bdf8;
}

.btn-primary {
  background: #0ea5e9;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, transform 0.1s;
}

.btn-primary:hover {
  background: #0284c7;
}

.btn-primary:active {
  transform: scale(0.98);
}

.switch-text {
  margin-top: 18px;
  font-size: 13px;
  color: #9ca3af;
  text-align: center;
}

.switch-link {
  color: #38bdf8;
  margin-left: 4px;
  cursor: pointer;
}

.switch-link:hover {
  text-decoration: underline;
}

.gizli {
  display: none;
}

/* ========================= */
/*        CHAT SAYFASI       */
/* ========================= */

.chat-layout {
  display: flex;
  height: 100vh;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background: #020617;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sidebar-header {
  margin-bottom: 8px;
}

.sidebar-section-title {
  font-size: 14px;
  color: #9ca3af;
  margin-bottom: 8px;
}

/* Kullanıcı listesi */
.user-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
  overflow-y: auto;
  padding-right: 4px;
}

/* Tek kullanıcı satırı */
.user-item {
  background: #0f172a;
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
  font-size: 14px;
}

.user-item:hover {
  background: #1e293b;
}

.user-item.aktif {
  border-color: #38bdf8;
}

/* Sol kısım: nokta + isim */
.user-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Online / Offline nokta */
.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

/* Online = yeşil, Offline = gri */
.status-online {
  background: #22c55e; /* yesil */
}

.status-offline {
  background: #6b7280; /* gri */
}

.user-name {
  color: #e5e7eb;
}

/* Okunmamış mesaj badge */
.unread-badge {
  background: #f97316;
  color: white;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 11px;
}

.logout-btn {
  margin-top: 10px;
}

/* Chat main */
.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: #020617;
}

.chat-header {
  height: 60px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid #1e293b;
  color: #e5e7eb;
}

.unread-info {
  font-size: 13px;
  color: #f97316;
}

/* Messages container */
.messages {
  flex: 1;
  padding: 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Mesaj kutuları */
.mesaj {
  max-width: 60%;
  padding: 10px 14px;
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.4;
  position: relative;
}

.mesaj-ben {
  align-self: flex-end;
  background: #0ea5e9;
  color: white;
  border-bottom-right-radius: 3px;
}

.mesaj-diger {
  align-self: flex-start;
  background: #111827;
  color: #e5e7eb;
  border-bottom-left-radius: 3px;
}

.mesaj-zaman {
  display: block;
  font-size: 11px;
  color: #9ca3af;
  margin-top: 4px;
}

/* Alt input alanı */
.chat-input-area {
  border-top: 1px solid #1e293b;
  padding: 10px 16px;
  display: flex;
  gap: 10px;
  align-items: center;
}

/* Input kutusu */
.message-input {
  flex: 1;
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  outline: none;
  background: #0f1624;
  color: #fff;
  font-size: 16px;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
  transition: 0.2s ease-in-out;
}

.message-input::placeholder {
  color: #8ea6c1;
}

.message-input:focus {
  background: #111b2c;
  box-shadow: 0 0 12px rgba(0, 175, 255, 0.5);
}

/* Gönder butonu */
.send-btn {
  padding: 12px 24px;
  border-radius: 12px;
  border: none;
  background: #008cff;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: 0.2s ease;
}

.send-btn:hover {
  background: #0aa3ff;
  transform: translateY(-1px);
}

.send-btn:active {
  transform: scale(0.97);
}

/* Responsive */
@media (max-width: 768px) {
  .chat-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    flex-direction: row;
    overflow-x: auto;
    align-items: center;
  }

  .user-list {
    flex-direction: row;
    gap: 8px;
  }

  .user-item {
    min-width: 120px;
  }

  .chat-main {
    flex: 1;
  }
}