@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display.swap');

:root {
    /* 색상 팔레트는 이전과 동일 */
    --bg-dark-navy: #0d0c1d;
    --bg-soft-purple: #2c2a4a;
    --bg-deep-purple: #1a183e;
    --accent-soft-lavender: #a18cd1;
    --accent-soft-pink: #fbc2eb;
    --text-light: #e6e6fa;
    --text-medium: #b0aac0;
    --container-bg-translucent: rgba(26, 24, 62, 0.6);
    --input-field-bg: rgba(13, 12, 29, 0.5);
    --user-msg-gradient: linear-gradient(135deg, #5b4f8a, #4e4376);
    --bot-msg-gradient: linear-gradient(135deg, #3a3768, #2c2a4a);
    --border-radius-main: 20px;

    /* --- ★★★ 추가: 광고 배너 높이 변수 ★★★ --- */
    --ad-height: 100px;
}

@keyframes twinkle {
    0% { transform: translateY(0); }
    100% { transform: translateY(-1000px); }
}

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

body {
    font-family: 'Noto+Sans+KR', sans-serif;
    color: var(--text-light);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    flex-direction: column;
    background: linear-gradient(135deg, var(--bg-dark-navy), var(--bg-soft-purple));
    overflow: hidden;

    /* --- ★★★ 수정: 광고 배너를 위한 하단 여백 추가 ★★★ --- */
    padding: 20px;
    padding-bottom: calc(var(--ad-height) + 20px);
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 200%;
    z-index: -1;
    background-color: var(--bg-dark-navy);
    background-image:
        radial-gradient(white, rgba(255,255,255,.2) 2px, transparent 40px),
        radial-gradient(white, rgba(255,255,255,.15) 1px, transparent 30px),
        radial-gradient(white, rgba(255,255,255,.1) 2px, transparent 40px),
        radial-gradient(rgba(255,255,255,.4), rgba(255,255,255,.1) 2px, transparent 30px);
    background-size: 550px 550px, 350px 350px, 250px 250px, 150px 150px;
    background-position: 0 0, 40px 60px, 130px 270px, 70px 100px;
    animation: twinkle 120s linear infinite;
}


/* --- 메인 페이지 (Intro) 스타일 --- */
.intro-container, .chat-container {
    width: 100%;
    max-width: 500px; /* 메인/채팅 너비 통일 */
    background-color: var(--container-bg-translucent);
    border-radius: var(--border-radius-main);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    padding: 40px 30px;
    display: flex;
    flex-direction: column;
    gap: 25px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    animation: fadeInScale 0.7s forwards;
}

.intro-container {
    align-items: center;
    text-align: center;
}

/*...(intro-container 내부 스타일은 이전과 동일)...*/
@keyframes fadeInScale {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.intro-logo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 3px solid var(--accent-soft-lavender);
    padding: 5px;
    background-color: var(--input-field-bg);
    box-shadow: 0 0 20px var(--accent-soft-lavender);
    object-fit: contain;
}

.intro-container h1 {
    font-size: 2.2em;
    color: var(--text-light);
    font-weight: 700;
    margin-bottom: 5px;
    text-shadow: 0 0 10px var(--accent-soft-lavender);
}

.input-group {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
}

.input-group label {
    font-size: 1.1em;
    font-weight: 500;
    color: var(--text-medium);
}

.intro-container input[type="date"],
.intro-container select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-color: var(--input-field-bg);
    color: var(--text-light);
    border-radius: 10px;
    font-size: 1.05em;
    outline: none;
    transition: box-shadow 0.3s, border-color 0.3s;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.intro-container input[type="date"]:focus,
.intro-container select:focus {
    box-shadow: 0 0 0 2px var(--accent-soft-lavender);
    border-color: var(--accent-soft-lavender);
}

.input-group select {
    background-image: url('data:image/svg+xml;utf8,<svg fill="%23e6e6fa" height="24" viewBox="0 0 24 24" width="24" xmlns="http://www.w3.org/2000/svg"><path d="M7 10l5 5 5-5z"/><path d="M0 0h24v24H0z" fill="none"/></svg>');
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 20px;
    padding-right: 35px;
}

/* --- 채팅 컨테이너 --- */
.chat-container {
    max-width: 600px;
    /* --- ★★★ 수정: 광고 배너 높이를 뺀 만큼만 차지하도록 높이/최대높이 수정 ★★★ --- */
    height: calc(100vh - 40px - var(--ad-height));
    max-height: 800px; /* 최대 높이 유지 */
    padding: 0;
}

.hidden { display: none !important; }

/* --- 채팅 헤더 --- */
.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    background-color: rgba(13, 12, 29, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-main) var(--border-radius-main) 0 0;
    flex-shrink: 0;
}

.chat-title {
    flex-grow: 1;
    text-align: center;
    font-size: 1.2em;
    font-weight: 500;
    color: var(--text-light);
}

.back-button {
    background: none;
    border: none;
    color: var(--text-medium);
    font-size: 1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 8px;
    transition: background-color 0.3s, color 0.3s;
    min-width: 110px;
}

.back-button:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
}
.back-button i { font-size: 1.1em; }

.header-spacer {
    min-width: 110px;
}

/* --- 채팅 창 & 메시지 --- */
.chat-window {
    flex-grow: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

/*...(나머지 CSS는 이전과 동일)...*/
.chat-window::-webkit-scrollbar { width: 8px; }
.chat-window::-webkit-scrollbar-track { background: var(--bg-deep-purple); }
.chat-window::-webkit-scrollbar-thumb { background-color: var(--accent-soft-lavender); border-radius: 20px; }

.message {
    max-width: 75%;
    padding: 12px 18px;
    border-radius: 18px;
    line-height: 1.5;
    opacity: 0;
    transform: translateY(10px);
    animation: fadeIn 0.5s forwards;
    color: var(--text-light);
}
.user-message {
    background: var(--user-msg-gradient);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}
.bot-message {
    background: var(--bot-msg-gradient);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
}
@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.typing-indicator {
    display: none;
    align-items: center;
    gap: 5px;
    padding: 12px 20px;
    background-color: transparent;
}
.typing-indicator span {
    width: 8px;
    height: 8px;
    background-color: var(--text-light);
    border-radius: 50%;
    animation: typing 1.2s infinite;
}
@keyframes typing { 0%, 60%, 100% { transform: translateY(0); } 30% { transform: translateY(-8px); } }

.chat-input-form {
    display: flex;
    padding: 15px;
    background-color: rgba(13, 12, 29, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0 0 var(--border-radius-main) var(--border-radius-main);
    flex-shrink: 0;
}
#userInput {
    flex-grow: 1;
    border: none;
    background-color: var(--input-field-bg);
    color: var(--text-light);
    padding: 12px 15px;
    border-radius: 20px;
    font-size: 16px;
    outline: none;
    transition: box-shadow 0.3s;
}
#userInput:focus { box-shadow: 0 0 0 2px var(--accent-soft-lavender); }

.primary-button, .chat-input-form button {
    background: linear-gradient(90deg, var(--accent-soft-lavender), var(--accent-soft-pink));
    border: none;
    color: var(--bg-deep-purple);
    font-weight: 700;
    padding: 12px 20px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.primary-button:hover, .chat-input-form button:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}
.primary-button:active, .chat-input-form button:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}
.chat-input-form button { margin-left: 10px; }

/* --- ★★★ 추가: 카카오 애드핏 광고 배너 스타일 ★★★ --- */
.kakao-ad {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    min-width: 320px;
    min-height: 100px;
    height: var(--ad-height);
    background-color: var(--bg-dark-navy);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.3);
}


@media (max-width: 600px) {
    body {
        padding: 0;
        padding-bottom: var(--ad-height); /* 모바일에서도 광고 공간 확보 */
        overflow: auto;
    }
    body::before { display: none; }
    body { background: linear-gradient(135deg, var(--bg-dark-navy), var(--bg-soft-purple)); }

    .chat-container, .intro-container {
        border-radius: 0;
        /* --- ★★★ 수정: 모바일 화면 높이 조정 ★★★ --- */
        height: 100%;
        min-height: calc(100vh - var(--ad-height));
        width: 100%;
        max-height: none;
        border: none;
        box-shadow: none;
        backdrop-filter: none;
    }
    .intro-container { justify-content: center; }
}