:root {
     --primary-dark: #075E54;
     --primary-light: #128C7E;
     --accent-green: #25D366;
     --background-gray: #F0F2F5;
     --chat-background-color: #EFEAE2;
     --bubble-sent: #D9FDD3;
     --bubble-received: #FFFFFF;
     --text-primary: #111B21;
     --text-secondary: #667781;
     --panel-border: #D1D7DB;
     --shadow-light: rgba(17, 27, 33, 0.08);
}

* {
     box-sizing: border-box;
     margin: 0;
     padding: 0;
}

body,
html {
     height: 100%;
     font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
     background-color: #F0F2F5;
     overflow: hidden;
}

/* --- GİRİŞ EKRANI --- */
#auth-container {
     width: 100%;
     height: 100vh;
     display: flex;
     justify-content: center;
     align-items: center;
     background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
}

.auth-form-wrapper {
     width: 100%;
     max-width: 420px;
     padding: 3rem 2.5rem;
     background: #fff;
     border-radius: 8px;
     box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.auth-form-wrapper h2 {
     color: var(--primary-dark);
     text-align: center;
     margin-bottom: 2rem;
     font-weight: 600;
}

.auth-form-wrapper .form-control {
     margin-bottom: 1rem;
     padding: 0.8rem 1rem;
}

.auth-form-wrapper .btn {
     padding: 0.8rem;
     font-weight: bold;
     background-color: var(--primary-light);
     border-color: var(--primary-light);
     transition: all 0.2s ease;
}

.auth-form-wrapper .btn:hover {
     background-color: var(--primary-dark);
     border-color: var(--primary-dark);
}

.auth-form-wrapper a {
     color: var(--primary-light);
     text-decoration: none;
}

/* --- ANA UYGULAMA EKRANI --- */
.app-container {
     position: relative;
     width: 100%;
     height: 100%;
     overflow: hidden;
}

#app-wrapper {
     display: none;
     width: 100%;
     height: 100%;
     flex-direction: row;
}

.left-panel {
     position: relative;
     flex-basis: 35%;
     min-width: 300px;
     max-width: 420px;
     display: flex;
     flex-direction: column;
     border-right: 1px solid var(--panel-border);
     background-color: #fff;
}

.panel-header {
     display: flex;
     justify-content: space-between;
     align-items: center;
     padding: 10px 16px;
     background-color: var(--primary-dark);
     flex-shrink: 0;
     color: #fff;
}

.panel-header button,
.panel-header #current-user-info {
     color: #fff;
}

#current-user-info {
     font-weight: 500;
     color: var(--text-primary);
}

#logout-btn,
#edit-nickname-btn {
     background: none;
     border: none;
     cursor: pointer;
     color: #8ad4ff;
     font-size: 1.3rem;
     transition: color 0.2s;
}

#logout-btn:hover,
#edit-nickname-btn:hover {
     color: var(--primary-dark);
}


#user-list {
     flex-grow: 1;
     overflow-y: auto;
}

.user-item {
     display: flex;
     flex-direction: row;
     align-items: center;
     padding: 10px 16px;
     cursor: pointer;
     border-bottom: 1px solid var(--background-gray);
     transition: background-color 0.2s ease-in-out;
}

.user-item:hover {
     background-color: var(--background-gray);
}

.user-item.active {
     background-color: #e9edef;
}

.user-avatar {
     width: 48px;
     height: 48px;
     border-radius: 50%;
     margin-right: 15px;
     flex-shrink: 0;
     display: flex;
     align-items: center;
     justify-content: center;

     font-size: 1.2rem;
     font-weight: 600;
     color: white;
}

.user-info {
     display: flex;
     flex-direction: column;
     justify-content: center;
     flex-grow: 1;
     overflow: hidden;
}

.user-item-main {
     display: flex;
     justify-content: space-between;
     align-items: center;
     width: 100%;
}

/* .unread-badge stilinin yeni, animasyonsuz ve sade hali */
.unread-badge {
     /* İsteğiniz üzerine yeşil arka plan */
     background-color: #28a745;
     /* Canlı bir yeşil tonu, değiştirebilirsiniz */

     /* İsteğiniz üzerine beyaz yazı rengi */
     color: white;

     font-size: 12px;
     font-weight: bold;
     border-radius: 50%;
     /* Daire şekli için */
     width: 22px;
     height: 22px;
     margin-right: 10px;
     margin-top: 4px;

     /* Rakamı dairenin tam ortasına almak için bu 3 satır gerekli */
     display: flex;
     justify-content: center;
     align-items: center;

     /* JavaScript tarafından kontrol edileceği için başlangıçta gizli */
     display: none;
}

.user-message-small-info {
     /* Span'in, içinde bulunduğu div'in tüm genişliğini kaplamasını sağlar */
     display: block;
     width: 100%;
     /* Genişliğin %100 olacağını garanti eder */

     /* Aşağıdaki 3 özellik "..." efektini oluşturur */
     white-space: nowrap;
     /* Metin alt satıra kaymasın */
     overflow: hidden;
     /* Taşan metni gizle */
     text-overflow: ellipsis;
     /* Gizlenen metin yerine ... koy */

     /* Sizin eklediğiniz orijinal stiller */
     color: #3ddef669;
     font-size: smaller;

     /* Estetik için sağ ve solda küçük bir boşluk bırakmak isterseniz */
     /* box-sizing: border-box; */
     /* padding: 0 5px; */
}

.user-item .username {
     font-weight: 500;
     font-size: 1.05rem;
     color: var(--text-primary);

     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
}


.status-indicator {
     display: flex;
     align-items: center;
     font-size: 0.75rem;
     color: var(--text-secondary);
     flex-shrink: 0;
}

.status-dot {
     width: 8px;
     height: 8px;
     border-radius: 50%;
     margin-right: 6px;
     background-color: var(--text-secondary);
     transition: background-color 0.3s;
}

.status-dot.online {
     background-color: var(--accent-green);
}

.user-item-status {
     font-size: 0.85rem;
     color: var(--text-secondary);
     margin-top: 3px;
     min-height: 18px;

     white-space: nowrap;
     overflow: hidden;
     text-overflow: ellipsis;
}

.user-item-status.typing {
     color: var(--accent-green);
     font-style: italic;
     font-weight: 500;
}

.right-panel {
     flex-grow: 1;
     display: flex;
     flex-direction: column;
     background-color: var(--chat-background-color);
     background-image: url('https://user-images.githubusercontent.com/15075759/28719144-86dc0f70-73b1-11e7-911d-60d70fcded21.png');
}

.chat-panel-main {
     display: flex;
     flex-direction: column;
     height: 100%;
}

#welcome-screen {
     justify-content: center;
     align-items: center;
     text-align: center;
     color: var(--text-secondary);
}

.welcome-icon {
     font-size: 5rem;
     color: #ddd;
     margin-bottom: 1.5rem;
}

#welcome-screen div {
     background: #fff;
     padding: 2.5rem;
     border-radius: 8px;
     box-shadow: 0 1px 3px var(--shadow-light);
}

#chat-view-active {
     display: none;
}

.chat-panel-main .panel-header {
     background-color: var(--primary-dark);
}

#chat-header-info {
     display: flex;
     flex-direction: column;
     text-align: left;
}

#chat-with-user {
     font-weight: 500;
     font-size: 1.1rem;
}

#chat-partner-status {
     font-size: 0.8rem;
     color: var(--text-secondary);
     min-height: 16px;
}

.panel-header button {
     background: none;
     border: none;
     color: var(--text-secondary);
     font-size: 1.2rem;
}

#back-to-users-btn {
     display: none;
}

#messages-container {
     flex-grow: 1;
     padding: 10px 7%;
     overflow-y: auto;
     display: flex;
     flex-direction: column;
}

.message-bubble {
     position: relative;
     max-width: 65%;
     min-width: 80px;
     padding: 8px 12px;
     border-radius: 8px;
     margin-bottom: 10px;
     box-shadow: 0 1px 1px var(--shadow-light);
     word-wrap: break-word;
     font-size: 0.95rem;
     width: 100%;
}

.message-bubble.sent {
     background-color: var(--bubble-sent);
     align-self: flex-end;
}

.message-bubble.received {
     background-color: var(--bubble-received);
     align-self: flex-start;
}

.message-content {
     /* Metin rengini, temanın ana metin rengi değişkenine bağlar */
     color: var(--text-primary);
}

.message-content img {
     max-width: 100%;
     border-radius: 6px;
     cursor: pointer;
     margin-top: 4px;
}

#typing-indicator-container {
     padding: 0 7%;
     min-height: 40px;
     display: flex;
     align-items: center;
     flex-shrink: 0;
}

.typing-bubble {
     display: inline-flex;
     align-items: center;
     padding: 10px 15px;
     border-radius: 18px;
     background-color: var(--bubble-received);
     box-shadow: 0 1px 1px var(--shadow-light);
     border-bottom-left-radius: 4px;
}

.typing-bubble .dot {
     width: 8px;
     height: 8px;
     margin: 0 2px;
     background-color: #a0a0a0;
     border-radius: 50%;
     animation: typing-bounce 1.3s infinite ease-in-out;
}

.typing-bubble .dot:nth-of-type(2) {
     animation-delay: -1.1s;
}

.typing-bubble .dot:nth-of-type(3) {
     animation-delay: -0.9s;
}

@keyframes typing-bounce {

     0%,
     60%,
     100% {
          transform: translateY(0);
     }

     30% {
          transform: translateY(-6px);
     }
}

.chat-footer {
     display: flex;
     align-items: center;
     gap: 12px;
     padding: 12px 16px;
     background-color: var(--background-gray);
     border-top: 1px solid var(--panel-border);
     flex-shrink: 0;
}

#chat-form {
     flex-grow: 1;
     display: flex;
     align-items: center;
     gap: 12px;
}

#message-input {
     flex-grow: 1;
     height: 44px;
     border-radius: 22px;
     padding: 10px 20px;
     border: 1px solid var(--panel-border);
     background-color: #fff;
     font-size: 0.95rem;
     outline: none;
     transition: all 0.2s ease-in-out;
}

#message-input:focus {
     border-color: var(--primary-light);
     box-shadow: 0 0 0 3px rgba(18, 140, 126, 0.2);
}

.chat-footer button {
     background: none;
     border: none;
     cursor: pointer;
     display: flex;
     align-items: center;
     justify-content: center;
     flex-shrink: 0;
     transition: all 0.2s ease-in-out;
}

.attachment-wrapper {
     position: relative;
}

#attachment-btn {
     font-size: 1.5rem;
     color: var(--text-secondary);
}

#attachment-btn:hover {
     color: var(--primary-dark);
     transform: rotate(15deg) scale(1.1);
}

#send-btn {
     width: 44px;
     height: 44px;
     border-radius: 50%;
     background-color: var(--primary-light);
     color: #fff;
     font-size: 1rem;
}

#send-btn:hover {
     background-color: var(--primary-dark);
     transform: scale(1.1) rotate(10deg);
     box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#attachment-menu {
     position: absolute;
     bottom: 55px;
     left: 0;
     background: #fff;
     border-radius: 8px;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
     overflow: hidden;
     display: none;
     width: 180px;
     padding: 5px;
     z-index: 100;
}

#attachment-menu button {
     width: 100%;
     text-align: left;
     padding: 12px 15px;
     font-size: 1rem;
     border-radius: 6px;
}

#attachment-menu button:hover {
     background-color: #f5f5f5;
}

@media (max-width: 768px) {
     .app-container {
          flex-direction: column;
     }

     .left-panel,
     .right-panel {
          width: 100%;
          height: 100%;
          max-width: 100%;
          flex-basis: 100%;
          position: absolute;
          top: 0;
          left: 0;
          transition: transform 0.3s ease-in-out;
     }

     .left-panel {
          transform: translateX(0);
          z-index: 10;
     }

     .right-panel {
          transform: translateX(100%);
          z-index: 20;
     }

     .right-panel.active {
          transform: translateX(0);
     }

     #back-to-users-btn {
          display: inline-block;
          margin-right: 10px;
     }
}

.loader-wrapper {
     display: flex;
     flex-direction: column;
     justify-content: center;
     align-items: center;
     height: 100%;
     color: var(--text-secondary);
}

.loader-spinner {
     width: 48px;
     height: 48px;
     border: 5px solid var(--background-gray);
     border-bottom-color: var(--primary-light);
     /* Dönen kısmın rengi */
     border-radius: 50%;
     display: inline-block;
     box-sizing: border-box;
     animation: rotation 1s linear infinite;
     margin-bottom: 1rem;
}

@keyframes rotation {
     0% {
          transform: rotate(0deg);
     }


     100% {
          transform: rotate(360deg);
     }
}

.message-meta {
     position: static;
     bottom: 0px;
     right: 10px;
     display: flex;
     align-items: center;
     font-size: 0.7rem;
     color: var(--text-secondary);
     white-space: nowrap;
     justify-content: flex-end;
}

.message-meta .timestamp {
     margin-right: 5px;
}

.message-meta .ticks {
     font-size: 0.9rem;
}

.message-meta .ticks.read {
     color: #53bdeb;
}

.fab-container {
     position: absolute;
     right: 30px;
     bottom: 30px;
     z-index: 100;
     display: flex;
     flex-direction: column;
     align-items: center;
}

.fab-button-main {
     width: 60px;
     height: 60px;
     background: linear-gradient(45deg, var(--primary-light), var(--primary-dark));
     color: white;
     border-radius: 50%;
     border: none;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 1.6rem;
     cursor: pointer;
     box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
     transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
     z-index: 101;
     margin-left: 50%;
}

.fab-container.active .fab-button-main {
     transform: rotate(225deg);
     background: linear-gradient(45deg, #e53935, #b71c1c);
     box-shadow: 0 3px 8px rgba(0, 0, 0, 0.4);
}

.fab-menu {
     display: flex;
     flex-direction: column-reverse;
     align-items: center;
     gap: 18px;
     margin-bottom: 20px;
}

.fab-item {
     display: flex;
     align-items: center;
     justify-content: flex-end;
     width: 220px;

     opacity: 0;
     transform: translateY(30px) scale(0.9);
     pointer-events: none;
     transition: all 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.28);
}

.fab-container.active .fab-item {
     opacity: 1;
     transform: translateY(0) scale(1);
     pointer-events: auto;
}

.fab-container.active .fab-item:nth-child(1) {
     transition-delay: 0.1s;
}

.fab-container.active .fab-item:nth-child(2) {
     transition-delay: 0.2s;
}

.fab-label {
     color: var(--bubble-received);
     padding: 6px 14px;
     border-radius: 6px;
     margin-right: 16px;
     font-size: 0.9rem;
     font-weight: 500;

     background: var(--primary-light);
     backdrop-filter: blur(8px);
     -webkit-backdrop-filter: blur(8px);
     border: 1px solid rgba(255, 255, 255, 0.2);
     box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.fab-button-small {
     width: 48px;
     height: 48px;
     background-color: #fff;
     color: var(--primary-dark);
     border-radius: 50%;
     border: none;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 1.2rem;
     cursor: pointer;
     box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
     transition: all 0.2s ease-in-out;
}

.fab-button-small:hover {
     transform: scale(1.15);
     color: var(--primary-light);
}


.fullscreen-panel {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background-color: #ffffff;
     z-index: 200;
     display: none;
     flex-direction: column;
     transition: transform 0.3s ease-in-out;
}

.fullscreen-panel .panel-header {
     flex-shrink: 0;
}

.fullscreen-panel .panel-header h3 {
     margin: 0;
     font-size: 1.2rem;
     font-weight: 500;
}

.fullscreen-panel .panel-header {
     justify-content: space-between;
}

.panel-content {
     flex-grow: 1;
     overflow-y: auto;
     padding: 20px;
}

.settings-content {
     padding: 0;
     background-color: var(--background-gray);
     flex-grow: 1;
     overflow-y: auto;
}

.header-actions {
     display: flex;
     align-items: center;
     gap: 10px;
}

.settings-profile {
     display: flex;
     align-items: center;
     padding: 20px;
     background-color: var(--bubble-received);
     cursor: pointer;
     transition: background-color 0.2s;
}

.settings-profile:hover {
     background-color: #f5f5f5;
}

.profile-avatar-large {
     width: 64px;
     height: 64px;
     border-radius: 50%;
     margin-right: 15px;
     display: flex;
     align-items: center;
     justify-content: center;
     font-size: 2rem;
     font-weight: 600;
     color: white;
}

.profile-info {
     flex-grow: 1;
}

.profile-info .username {
     font-size: 1.2rem;
     font-weight: 500;
     color: var(--text-primary);
}

.profile-info .email {
     font-size: 0.9rem;
     color: var(--text-secondary);
}

.settings-list {
     padding: 20px 0;
}

.settings-section {
     background-color: var(--bubble-received);
     margin-bottom: 20px;
     border-top: 1px solid var(--panel-border);
     border-bottom: 1px solid var(--panel-border);
}

.settings-item {
     display: flex;
     align-items: center;
     padding: 15px 20px;
     cursor: pointer;
     transition: background-color 0.2s;
}

.settings-item:not(:last-child) {
     border-bottom: 1px solid var(--background-gray);
}

.settings-item:hover {
     background-color: #f5f5f5;
}

.item-icon {
     width: 30px;
     margin-right: 20px;
     font-size: 1.1rem;
     color: var(--text-secondary);
     text-align: center;
}

.item-text {
     flex-grow: 1;
}

.item-title {
     color: var(--text-primary);
     font-size: 1rem;
}

.item-action {
     color: var(--text-secondary);
}

.switch {
     position: relative;
     display: inline-block;
     width: 50px;
     height: 28px;
}

.switch input {
     opacity: 0;
     width: 0;
     height: 0;
}

.slider {
     position: absolute;
     cursor: pointer;
     top: 0;
     left: 0;
     right: 0;
     bottom: 0;
     background-color: #ccc;
     transition: .4s;
}

.slider:before {
     position: absolute;
     content: "";
     height: 20px;
     width: 20px;
     left: 4px;
     bottom: 4px;
     background-color: white;
     transition: .4s;
}

input:checked+.slider {
     background-color: var(--accent-green);
}

input:checked+.slider:before {
     transform: translateX(22px);
}

.slider.round {
     border-radius: 34px;
}

.slider.round:before {
     border-radius: 50%;
}

html[data-theme='dark'] {
     --primary-dark: #075E54;
     --primary-light: #128C7E;
     --accent-green: #25D366;
     --background-gray: #121212;
     --chat-background-color: #0b141a;
     --bubble-sent: #005c4b;
     --bubble-received: #202c33;
     --text-primary: #e9edef;
     --text-secondary: #8696a0;
     --panel-border: #2f3b44;
}

html[data-theme='dark'] .settings-profile,
html[data-theme='dark'] .settings-section {
     background-color: var(--bubble-received);
     border-color: var(--panel-border);
}

html[data-theme='dark'] .settings-item:hover {
     background-color: #2a3942;
}

html[data-theme='dark'] body {
     background-color: #111;
}

html[data-theme='dark'] {
     --background-gray: #121212;
     --chat-background-color: #0b141a;
     --bubble-sent: #005c4b;
     --bubble-received: #202c33;
     --text-primary: #e9edef;
     --text-secondary: #8696a0;
     --panel-border: #2f3b44;
}

html[data-theme='dark'] .left-panel {
     background-color: var(--bubble-received);
     border-right-color: var(--panel-border);
}

html[data-theme='dark'] .panel-header {
     background-color: var(--bubble-received);
     border-bottom-color: var(--panel-border);
}

html[data-theme='dark'] .panel-header #current-user-info,
html[data-theme='dark'] .panel-header button {
     color: var(--text-primary);
}

html[data-theme='dark'] .user-item.active {
     background-color: #2a3942;
}

html[data-theme='dark'] .user-item:not(:last-child)::after {
     background-color: var(--panel-border);
}

html[data-theme='dark'] .settings-profile,
html[data-theme='dark'] .settings-section {
     background-color: var(--bubble-received);
     border-color: var(--panel-border);
}

html[data-theme='dark'] .settings-item:hover {
     background-color: #2a3942;
}

html[data-theme='dark'] body {
     background-color: #111;
}

html[data-theme='dark'] .chat-panel-main .panel-header {
     background-color: var(--bubble-received);
}

.email-suggestion {
     font-size: 0.85rem;
     color: var(--text-secondary);
     margin-top: -10px;
     margin-bottom: 10px;
     padding: 0 5px;
     height: 20px;
}

.email-suggestion a {
     color: var(--primary-light);
     font-weight: 500;
     text-decoration: none;
     cursor: pointer;
}

.email-suggestion a:hover {
     text-decoration: underline;
}



/* index.css dosyasının sonuna ekleyin */

/* --- Lightbox (Resim Büyütme) Stilleri --- */
#lightbox-overlay {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background-color: rgba(0, 0, 0, 0.85);
     /* Arka planı karart */

     /* Başlangıçta gizli olacak */
     display: none;

     /* İçindeki resmi ortalamak için */
     justify-content: center;
     align-items: center;

     z-index: 1000;
     /* Her şeyin üzerinde kalması için */

     /* Yumuşak bir açılış animasyonu */
     animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
     from {
          opacity: 0;
     }

     to {
          opacity: 1;
     }
}

#lightbox-image {
     max-width: 90%;
     max-height: 90%;
     border-radius: 5px;
     box-shadow: 0 0 30px rgba(0, 0, 0, 0.5);

     /* Resmin büyüme animasyonu */
     animation: zoomIn 0.3s ease-in-out;
}

@keyframes zoomIn {
     from {
          transform: scale(0.8);
     }

     to {
          transform: scale(1);
     }
}

#lightbox-close {
     position: absolute;
     top: 20px;
     right: 35px;
     color: #fff;
     font-size: 40px;
     font-weight: bold;
     cursor: pointer;
     transition: color 0.2s;
}

#lightbox-close:hover {
     color: #ccc;
}