/* public/css/style.css */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root {
    --app-height: 100vh;
    --chat-bg-color: #ffffff;
    --chat-font-family: 'Nunito', Arial, sans-serif;
    --chat-border-radius-soft: 8px;
    --chat-border-radius-strong: 18px;
    --chat-header-display: flex;
    --chat-header-bg-color: #2c3e50;
    --chat-header-padding: 10px 15px;
    --chat-header-min-height: 50px;
    --chat-header-justify-content: center; 
    --chat-header-logo-display: none; 
    --chat-header-logo-max-height: 30px;
    --chat-header-logo-order: 1; 
    --chat-header-logo-margin-right: 0px; 
    --chat-header-logo-margin-left: 0px; 
    --chat-header-titles-order: 2; 
    --chat-header-titles-text-align: center; 
    --chat-header-titles-align-items: center; 
    --chat-header-titles-padding-left: 0px; 
    --chat-header-titles-padding-right: 0px; 
    --chat-header-title-display: block; 
    --chat-header-title-text-color: #FFFFFF;
    --chat-header-title-font-size: 1em;
    --chat-header-title-font-weight: 600;
    --chat-header-subtitle-display: none; 
    --chat-header-subtitle-text-color: #DDDDDD;
    --chat-header-subtitle-font-size: 0.85em;
    --chat-header-subtitle-font-weight: 400;
    --chat-header-subtitle-margin-top: 2px;
    --chat-header-clear-button-display: none; 
    --chat-header-clear-button-color: #FFFFFF; 
    --chat-header-clear-button-bg-color: transparent;
    --chat-header-clear-button-hover-bg-color: rgba(255,255,255,0.1);
    --chat-header-clear-button-margin-left: auto; 
    --chat-header-clear-button-order: 99; 
    --chat-header-clear-icon-size: 18px; 
    --chat-header-clear-button-size: 30px; 
    --chat-header-close-button-color: #FFFFFF; 
    --chat-header-close-button-bg-color: transparent;
    --chat-header-close-button-hover-bg-color: rgba(255,255,255,0.15);
    --chat-header-close-icon-size: 20px;
    --chat-header-close-button-size: 30px;
    --chat-messages-padding: 15px;
    --chat-messages-gap: 10px;
    --chat-messages-scrollbar-track-bg: #f1f1f1;
    --chat-messages-scrollbar-thumb-bg: #c1c1c1;
    --chat-messages-scrollbar-thumb-hover-bg: #a1a1a1;
    --chat-messages-actual-bg-color: var(--chat-bg-color); 
    --user-message-bg-color: #3498db;
    --user-message-text-color: #FFFFFF;
    --bot-message-bg-color: #ecf0f1;
    --bot-message-text-color: #333333;
    --message-padding: 10px 15px;
    --message-line-height: 1.5;
    --message-box-shadow: 0 1px 2px rgba(0,0,0,0.07);
    --message-tail-size: 8px; 
    --chat-icon-size: 32px;
    --chat-icon-margin: 8px;
    --input-area-actual-bg-color: #f4f7f9; 
    --input-area-padding: 10px 15px;
    --user-input-padding: 10px 15px;
    --user-input-border-color: #ced4da;
    --user-input-bg-color: #ffffff;
    --user-input-focus-border-color: var(--user-message-bg-color); 
    --user-input-focus-shadow-color-rgb: 0,123,255; 
    --user-input-actual-text-color: #333333; 
    --send-button-size: 40px;
    --send-button-icon-size: 20px;
    --send-button-actual-bg-color: var(--user-message-bg-color); 
    --send-button-actual-icon-color: var(--user-message-text-color); 
    --powered-by-padding: 8px;
    --powered-by-text-color: #95a5a6;
    --powered-by-bg-color: var(--input-area-actual-bg-color); 
    --powered-by-font-size: 0.75em;
    --feedback-icon-size: 16px;
    --feedback-icon-color: #555555;
    --feedback-icon-hover-color: #007bff;
    --feedback-icon-selected-color: #0056b3;
    --feedback-icon-disabled-opacity: 0.5;
    --feedback-like-icon-selected-color: #28a745; 
    --feedback-dislike-icon-selected-color: #dc3545;
}

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

body {
    font-family: var(--chat-font-family);
    background-color: var(--chat-bg-color); 
    color: var(--bot-message-text-color); 
    display: flex;
    flex-direction: column;
    height: var(--app-height); 
    overflow: hidden; 
}

.chat-container {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background-color: var(--chat-bg-color); 
    font-family: var(--chat-font-family);
    border-radius: var(--chat-border-radius-soft); 
    box-shadow: 0 5px 25px rgba(0,0,0,0.1); 
    overflow: hidden; 
}

.chat-header {
    background-color: var(--chat-header-bg-color);
    padding: var(--chat-header-padding);
    display: var(--chat-header-display); 
    align-items: center;
    justify-content: var(--chat-header-justify-content);
    flex-shrink: 0; 
    min-height: var(--chat-header-min-height);
    box-sizing: border-box;
    position: relative; 
}

#chatHeaderLogo {
    display: var(--chat-header-logo-display);
    max-height: var(--chat-header-logo-max-height);
    width: auto;
    object-fit: contain;
    order: var(--chat-header-logo-order);
    margin-right: var(--chat-header-logo-margin-right);
    margin-left: var(--chat-header-logo-margin-left);
    flex-shrink: 0;
}

.header-titles {
    display: flex;
    flex-direction: column;
    flex-grow: 1; 
    overflow: hidden; 
    order: var(--chat-header-titles-order);
    text-align: var(--chat-header-titles-text-align);
    align-items: var(--chat-header-titles-align-items);
    padding-left: var(--chat-header-titles-padding-left);
    padding-right: var(--chat-header-titles-padding-right);
}

#chatHeaderTitle {
    display: var(--chat-header-title-display);
    font-size: var(--chat-header-title-font-size);
    color: var(--chat-header-title-text-color);
    font-weight: var(--chat-header-title-font-weight);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#chatHeaderSubtitle {
    display: var(--chat-header-subtitle-display);
    font-size: var(--chat-header-subtitle-font-size);
    color: var(--chat-header-subtitle-text-color);
    font-weight: var(--chat-header-subtitle-font-weight);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: var(--chat-header-subtitle-margin-top);
}

#clearChatBtn {
    display: var(--chat-header-clear-button-display); 
    background-color: var(--chat-header-clear-button-bg-color);
    color: var(--chat-header-clear-button-color);
    border: none;
    padding: 0; 
    border-radius: 50%; 
    cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease;
    margin-left: var(--chat-header-clear-button-margin-left); 
    order: var(--chat-header-clear-button-order);
    flex-shrink: 0; 
    width: var(--chat-header-clear-button-size); 
    height: var(--chat-header-clear-button-size); 
    align-items: center; 
    justify-content: center; 
    outline: none; 
}
#clearChatBtn:hover {
    background-color: var(--chat-header-clear-button-hover-bg-color);
    opacity: 0.85;
}
#clearChatBtn svg,
#clearChatBtn img { 
    width: var(--chat-header-clear-icon-size); 
    height: var(--chat-header-clear-icon-size);
    fill: currentColor; 
    object-fit: contain;
}

#closeChatWindowBtn {
    display: flex; 
    background-color: var(--chat-header-close-button-bg-color);
    color: var(--chat-header-close-button-color); 
    border: none;
    padding: 0;
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s ease, opacity 0.2s ease;
    margin-left: 8px; 
    order: 100; 
    flex-shrink: 0;
    width: var(--chat-header-close-button-size);
    height: var(--chat-header-close-button-size);
    align-items: center;
    justify-content: center;
    outline: none;
}
#closeChatWindowBtn:hover {
    background-color: var(--chat-header-close-button-hover-bg-color);
    opacity: 0.85;
}
#closeChatWindowBtn svg {
    width: var(--chat-header-close-icon-size);
    height: var(--chat-header-close-icon-size);
    fill: currentColor;
}

.chat-messages {
    flex-grow: 1;
    padding: var(--chat-messages-padding);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--chat-messages-gap);
    background-color: var(--chat-messages-actual-bg-color);
    min-height: 150px; 
}

.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-track { background: var(--chat-messages-scrollbar-track-bg); border-radius: 10px;}
.chat-messages::-webkit-scrollbar-thumb { background: var(--chat-messages-scrollbar-thumb-bg); border-radius: 10px;}
.chat-messages::-webkit-scrollbar-thumb:hover { background: var(--chat-messages-scrollbar-thumb-hover-bg); }

.message-wrapper {
    display: flex;
    max-width: 80%; 
    align-items: flex-end; 
}

.chat-icon {
    width: var(--chat-icon-size);
    height: var(--chat-icon-size);
    border-radius: var(--chat-border-radius-soft, 8px); 
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

.user-message-wrapper { align-self: flex-end; flex-direction: row-reverse; }
.user-message-wrapper .chat-icon { margin-left: var(--chat-icon-margin); }

.bot-message-wrapper { align-self: flex-start; }
.bot-message-wrapper .chat-icon { margin-right: var(--chat-icon-margin); }

.message {
    padding: var(--message-padding);
    border-radius: var(--chat-border-radius-strong);
    line-height: var(--message-line-height);
    word-wrap: break-word; 
    box-shadow: var(--message-box-shadow);
    position: relative; 
}
.message p { margin: 0; } 

.message a {
    text-decoration: underline;
}
.user-message a { color: var(--user-message-text-color); opacity: 0.9; } 
.user-message a:hover { opacity: 1; }
.bot-message a { color: var(--user-message-bg-color); } 
.bot-message a:hover { filter: brightness(90%); }

.user-message {
    background-color: var(--user-message-bg-color);
    color: var(--user-message-text-color);
    border-bottom-right-radius: var(--chat-border-radius-soft); 
}

.bot-message {
    background-color: var(--bot-message-bg-color);
    color: var(--bot-message-text-color);
    border-bottom-left-radius: var(--chat-border-radius-soft); 
}

.message::before {
    content: "";
    position: absolute;
    bottom: 0px; 
    width: 0;
    height: 0;
    border-style: solid;
    border-width: var(--message-tail-size);
}
.user-message::before {
    right: calc(-1 * var(--message-tail-size) + 1px); 
    border-color: transparent transparent transparent var(--user-message-bg-color);
    transform: rotate(45deg); 
    bottom: 3px;
    right: calc(-0.5 * var(--message-tail-size));
    border-width: calc(var(--message-tail-size) * 0.7);
}
.bot-message::before {
    left: calc(-1 * var(--message-tail-size) + 1px); 
    border-color: transparent var(--bot-message-bg-color) transparent transparent;
    transform: rotate(-45deg); 
    bottom: 3px;
    left: calc(-0.5 * var(--message-tail-size));
    border-width: calc(var(--message-tail-size) * 0.7);
}

.bot-message.loading p i { color: var(--bot-message-text-color); opacity:0.7; font-style: normal; display: inline-block; }
.bot-message.loading p i::after {
    content: '.'; animation: dots 1s steps(5, end) infinite;
    display: inline-block; width: 20px; text-align: left;
}
@keyframes dots {
    0%, 20% { color: rgba(0,0,0,0); text-shadow: .25em 0 0 rgba(0,0,0,0), .5em 0 0 rgba(0,0,0,0); }
    40% { color: inherit; text-shadow: .25em 0 0 rgba(0,0,0,0), .5em 0 0 rgba(0,0,0,0); }
    60% { text-shadow: .25em 0 0 currentColor, .5em 0 0 rgba(0,0,0,0); }
    80%, 100% { text-shadow: .25em 0 0 currentColor, .5em 0 0 currentColor; }
}

.message-feedback {
    margin-top: 8px;
    text-align: right;
}
.feedback-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 2px 4px;
    margin-left: 5px;
    font-size: var(--feedback-icon-size);
    color: var(--feedback-icon-color);
    opacity: 0.7;
    transition: opacity 0.2s ease, color 0.2s ease;
    line-height: 1;
}
.feedback-btn:hover {
    opacity: 1;
    color: var(--feedback-icon-hover-color);
}
.feedback-btn img {
    width: var(--feedback-icon-size);
    height: var(--feedback-icon-size);
    vertical-align: middle;
    pointer-events: none;
}
.feedback-btn.selected.feedback-like {
    color: var(--feedback-like-icon-selected-color);
    opacity: 1;
}
.feedback-btn.selected.feedback-dislike {
    color: var(--feedback-dislike-icon-selected-color);
    opacity: 1;
}
.message-feedback.feedback-submitted .feedback-btn {
    cursor: default;
    opacity: var(--feedback-icon-disabled-opacity);
}
.message-feedback.feedback-submitted .feedback-btn.selected {
    opacity: 1;
}

.chat-input-area {
    display: flex;
    align-items: center; 
    padding: var(--input-area-padding);
    background-color: var(--input-area-actual-bg-color);
    border-top: none; 
    flex-shrink: 0; 
    position: relative;
}

#userInput {
    flex-grow: 1; 
    padding: var(--user-input-padding);
    padding-right: calc(var(--send-button-size) + 5px); 
    border: 1px solid var(--user-input-border-color);
    border-radius: var(--chat-border-radius-strong); 
    resize: none; 
    font-size: 0.95em;
    line-height: 1.4;
    margin-right: 0;
    min-height: var(--send-button-size); 
    max-height: 100px; 
    overflow-y: auto; 
    font-family: var(--chat-font-family);
    background-color: var(--user-input-bg-color);
    color: var(--user-input-actual-text-color);
    outline: none; 
}
#userInput:focus {
    border-color: var(--user-input-focus-border-color);
    box-shadow: 0 0 0 2px hsla(from var(--user-input-focus-border-color) h s l / 0.25); 
}
#userInput::placeholder {
    color: #999;
    opacity: 1; 
}

#sendMessageBtn {
    background-color: var(--send-button-actual-bg-color);
    color: var(--send-button-actual-icon-color);
    border: none;
    width: var(--send-button-size);
    height: var(--send-button-size);
    border-radius: 50%; 
    cursor: pointer;
    transition: opacity 0.2s ease, transform 0.1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0; 
    outline: none;
}
#sendMessageBtn:hover { opacity: 0.85; }
#sendMessageBtn:active { transform: scale(0.95); } 
#sendMessageBtn svg {
    width: var(--send-button-icon-size);
    height: var(--send-button-icon-size);
    fill: currentColor;
}
#sendMessageBtn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: scale(1); 
}

#poweredByContainer {
    text-align: center;
    font-size: var(--powered-by-font-size);
    color: var(--powered-by-text-color);
    background-color: var(--powered-by-bg-color); 
    padding: var(--powered-by-padding);
    border-top: none; 
    flex-shrink: 0; 
}
#poweredByContainer a {
    color: inherit;
    text-decoration: none;
    font-weight: 600;
}
#poweredByContainer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    .chat-messages {
        padding: 10px;
        gap: 8px;
    }
    .message-wrapper {
        max-width: 85%;
    }
    .message {
        padding: 8px 12px;
    }
    :root {
        --chat-icon-size: 30px;
        --chat-icon-margin: 6px;
    }
    .chat-input-area {
        padding: 8px 10px;
    }
    #userInput {
        padding: 8px 12px;
        padding-right: calc(38px + 5px);
        min-height: 38px;
    }
    #sendMessageBtn {
        width: 38px;
        height: 38px;
        right: 10px;
    }
    .chat-header {
        min-height: 45px;
        padding: 8px 10px;
    }
    #chatHeaderTitle {
        font-size: 0.95em;
    }
    #chatHeaderSubtitle {
        font-size: 0.75em;
    }
}

.chat-container.fullscreen-mode {
    width: 100% !important;
    max-width: 100% !important;
    height: var(--app-height, 100vh) !important;
    border-radius: 0 !important;
    box-shadow: none !important;
}

/* YENİ EKLENEN KURAL: Tam ekran modunda kapatma butonunu gizle */
.chat-container.fullscreen-mode #closeChatWindowBtn {
    display: none !important;
}