/* =========================================================
   Neo-brutalist "sticker" UI
   크림 종이 + 굵은 잉크 테두리 + 하드 섀도 + 원색 포인트
   ========================================================= */
:root {
    --paper: #fff6e3;
    --card: #ffffff;
    --ink: #17120d;
    --ink-soft: #5c5348;
    --yellow: #ffd23f;
    --coral: #ff6b4a;
    --mint: #7ce8c4;
    --sky: #8fb4ff;
    --lilac: #cdb4ff;
    --bw: 2.5px;
    --shadow: 5px 5px 0 var(--ink);
    --shadow-sm: 3px 3px 0 var(--ink);
    --radius: 14px;
}

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

body {
    font-family: 'Space Grotesk', 'Pretendard Variable', 'Pretendard', -apple-system, 'Noto Sans KR', sans-serif;
    color: var(--ink);
    background-color: var(--paper);
    background-image: radial-gradient(rgba(23, 18, 13, 0.16) 1.2px, transparent 1.2px);
    background-size: 22px 22px;
    min-height: 100vh;
    padding: 32px 20px 40px;
    line-height: 1.5;
}

.container {
    max-width: 920px;
    margin: 0 auto;
}

/* ===== 헤더: 스티커 타이틀 ===== */
header {
    position: relative;
    text-align: left;
    padding: 26px 30px 24px;
    background: var(--yellow);
    border: var(--bw) solid var(--ink);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    transform: rotate(-0.6deg);
}

header::after {
    content: 'BETA ✦';
    position: absolute;
    top: -16px;
    right: 24px;
    padding: 4px 12px;
    background: var(--coral);
    color: white;
    font-size: 0.8em;
    font-weight: 700;
    letter-spacing: 0.08em;
    border: var(--bw) solid var(--ink);
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
    transform: rotate(4deg);
}

header h1 {
    font-size: clamp(1.7em, 4.5vw, 2.6em);
    font-weight: 700;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: 8px;
}

header p {
    font-size: 0.98em;
    font-weight: 500;
    color: var(--ink);
    opacity: 0.8;
}

/* ===== 탭: 인덱스 카드 ===== */
.tabs {
    display: flex;
    gap: 10px;
    padding: 0 6px;
    margin-bottom: -2.5px;
    position: relative;
    z-index: 2;
}

.tab-button {
    flex: 0 1 auto;
    padding: 12px 22px;
    font: inherit;
    font-weight: 700;
    font-size: 0.95em;
    color: var(--ink);
    background: var(--card);
    border: var(--bw) solid var(--ink);
    border-bottom: var(--bw) solid var(--ink);
    border-radius: 12px 12px 0 0;
    cursor: pointer;
    transition: transform 0.12s, background 0.12s;
}

.tab-button:nth-child(1):hover { background: var(--mint); }
.tab-button:nth-child(2):hover { background: var(--sky); }
.tab-button:nth-child(3):hover { background: var(--lilac); }

.tab-button:hover { transform: translateY(-3px); }

.tab-button.active {
    transform: translateY(0);
    border-bottom-color: var(--card);
}

.tab-button.active:nth-child(1) { background: var(--mint); border-bottom-color: var(--mint); }
.tab-button.active:nth-child(2) { background: var(--sky); border-bottom-color: var(--sky); }
.tab-button.active:nth-child(3) { background: var(--lilac); border-bottom-color: var(--lilac); }

/* ===== 메인 패널 ===== */
.tab-content {
    display: none;
    padding: 24px;
    border: var(--bw) solid var(--ink);
    border-radius: var(--radius);
    border-top-left-radius: 0;
    box-shadow: var(--shadow);
    min-height: 420px;
}

.tab-content.active { display: block; }

#chat-tab { background: var(--mint); }
#multimodal-tab { background: var(--sky); }
#web-tab { background: var(--lilac); }

/* ===== 채팅 ===== */
.chat-container {
    display: flex;
    flex-direction: column;
    height: min(640px, calc(100vh - 360px));
    min-height: 440px;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding: 22px;
    background: var(--paper);
    border: var(--bw) solid var(--ink);
    border-radius: var(--radius);
    margin-bottom: 16px;
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar { width: 12px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; border-left: 2px solid var(--ink); }
.chat-messages::-webkit-scrollbar-thumb { background: var(--ink); border-radius: 0; }

/* 빈 상태 */
.chat-empty {
    margin: auto;
    text-align: center;
    max-width: 520px;
}

.chat-empty .emoji {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 84px;
    height: 84px;
    font-size: 2.6em;
    background: var(--yellow);
    border: var(--bw) solid var(--ink);
    border-radius: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 22px;
    animation: wobble 3s ease-in-out infinite;
}

.chat-empty h2 {
    font-size: 1.8em;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 6px;
}

.chat-empty p { color: var(--ink-soft); font-weight: 500; }

.suggestions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 26px;
}

.suggestion-chip {
    padding: 9px 16px;
    font: inherit;
    font-weight: 600;
    font-size: 0.9em;
    color: var(--ink);
    background: var(--card);
    border: var(--bw) solid var(--ink);
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s, background 0.1s;
}

.suggestion-chip:nth-child(4n+1) { background: var(--yellow); }
.suggestion-chip:nth-child(4n+2) { background: var(--coral); color: white; }
.suggestion-chip:nth-child(4n+3) { background: var(--sky); }
.suggestion-chip:nth-child(4n+4) { background: var(--lilac); }

.suggestion-chip:hover { transform: translate(-2px, -2px) rotate(-1deg); box-shadow: 5px 5px 0 var(--ink); }
.suggestion-chip:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); }

/* 메시지: 스티커 카드 */
.message {
    display: flex;
    gap: 12px;
    max-width: 82%;
    animation: pop 0.25s ease;
}

.message.user {
    flex-direction: row-reverse;
    margin-left: auto;
}

.avatar {
    flex: none;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15em;
    border: var(--bw) solid var(--ink);
    border-radius: 12px;
    box-shadow: 2px 2px 0 var(--ink);
    background: var(--mint);
}

.message.user .avatar { background: var(--yellow); transform: rotate(4deg); }
.message.assistant .avatar { transform: rotate(-4deg); }

.message-body {
    min-width: 0;
    display: flex;
    flex-direction: column;
}

.message.user .message-body { align-items: flex-end; }

.bubble {
    position: relative;
    padding: 12px 16px;
    line-height: 1.65;
    font-weight: 500;
    word-break: break-word;
    white-space: pre-wrap;
    border: var(--bw) solid var(--ink);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.message.user .bubble {
    background: var(--yellow);
    border-top-right-radius: 4px;
}

.message.assistant .bubble {
    background: var(--card);
    border-top-left-radius: 4px;
}

.message.is-error .bubble {
    background: var(--coral);
    color: white;
    font-weight: 600;
}

.message-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
    font-size: 0.76em;
    font-weight: 600;
    color: var(--ink-soft);
}

.copy-btn {
    padding: 2px 9px;
    font: inherit;
    color: var(--ink);
    background: var(--card);
    border: 2px solid var(--ink);
    border-radius: 999px;
    cursor: pointer;
    transition: background 0.1s, transform 0.1s;
}

.copy-btn:hover { background: var(--yellow); transform: translateY(-1px); }

/* 타이핑 */
.typing { display: inline-flex; gap: 6px; padding: 8px 2px; }

.typing span {
    width: 11px;
    height: 11px;
    background: var(--coral);
    border: 2px solid var(--ink);
    border-radius: 50%;
    animation: bounce 1s infinite ease-in-out;
}

.typing span:nth-child(2) { background: var(--yellow); animation-delay: 0.15s; }
.typing span:nth-child(3) { background: var(--sky); animation-delay: 0.3s; }

@keyframes bounce {
    0%, 60%, 100% { transform: translateY(0); }
    30% { transform: translateY(-8px); }
}

@keyframes pop {
    from { opacity: 0; transform: scale(0.94) translateY(6px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes wobble {
    0%, 100% { transform: rotate(-4deg); }
    50% { transform: rotate(4deg) translateY(-4px); }
}

/* 입력창 */
.chat-input-container {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    padding: 10px 10px 10px 18px;
    background: var(--card);
    border: var(--bw) solid var(--ink);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform 0.12s, box-shadow 0.12s;
}

.chat-input-container:focus-within {
    transform: translate(-2px, -2px);
    box-shadow: 7px 7px 0 var(--ink);
}

.chat-input-container textarea {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    background: transparent;
    color: var(--ink);
    font: inherit;
    font-weight: 500;
    line-height: 1.5;
    max-height: 140px;
    padding: 8px 0;
}

.chat-input-container textarea::placeholder { color: #9a8f80; }

.chat-input-container button {
    height: 42px;
    font: inherit;
    font-weight: 700;
    color: var(--ink);
    border: var(--bw) solid var(--ink);
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.08s, box-shadow 0.08s;
    box-shadow: var(--shadow-sm);
}

.chat-input-container button:active:not(:disabled) {
    transform: translate(3px, 3px);
    box-shadow: 0 0 0 var(--ink);
}

#chat-send-btn { padding: 0 24px; background: var(--coral); color: white; }
#chat-send-btn:hover:not(:disabled) { background: #ff5a36; }
#chat-send-btn:disabled { background: #d9d0c3; color: var(--ink-soft); cursor: not-allowed; box-shadow: none; transform: translate(3px, 3px); }

#chat-clear-btn { padding: 0 14px; background: var(--card); }
#chat-clear-btn:hover { background: var(--yellow); }

.input-hint {
    margin-top: 14px;
    text-align: center;
    font-size: 0.78em;
    font-weight: 600;
    color: var(--ink);
    opacity: 0.7;
}

/* ===== 멀티모달 / 웹 요약 ===== */
.multimodal-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    align-items: start;
}

.web-container { display: flex; flex-direction: column; gap: 20px; }

.input-section { display: flex; flex-direction: column; gap: 14px; }

.input-section textarea,
.web-container input[type="url"] {
    padding: 13px 15px;
    font: inherit;
    font-weight: 500;
    color: var(--ink);
    background: var(--card);
    border: var(--bw) solid var(--ink);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    resize: vertical;
    outline: none;
    transition: transform 0.12s, box-shadow 0.12s;
}

.input-section textarea:focus,
.web-container input[type="url"]:focus {
    transform: translate(-2px, -2px);
    box-shadow: 5px 5px 0 var(--ink);
}

.file-upload-section { display: flex; flex-direction: column; gap: 12px; }

.file-label {
    padding: 26px 14px;
    text-align: center;
    font-weight: 700;
    background: var(--yellow);
    border: var(--bw) dashed var(--ink);
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.12s, background 0.12s;
}

.file-label:hover { background: var(--card); transform: rotate(-0.8deg) scale(1.01); }

.file-upload-section input[type="file"] { display: none; }

.image-preview { display: flex; flex-wrap: wrap; gap: 12px; }

.image-preview-item {
    position: relative;
    width: 100px;
    height: 100px;
    border: var(--bw) solid var(--ink);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    background: white;
}

.image-preview-item img { width: 100%; height: 100%; object-fit: cover; }

.image-preview-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: var(--coral);
    color: white;
    border: 2px solid var(--ink);
    border-radius: 50%;
    font-weight: 700;
    cursor: pointer;
}

.button-group { display: flex; gap: 12px; }

.button-group button,
.web-container button {
    padding: 13px 22px;
    font: inherit;
    font-weight: 700;
    color: var(--ink);
    border: var(--bw) solid var(--ink);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: transform 0.08s, box-shadow 0.08s, background 0.1s;
}

.button-group button { flex: 1; }

.button-group button:first-child,
.web-container button { background: var(--coral); color: white; }

.button-group button:last-child { background: var(--card); }
.button-group button:last-child:hover { background: var(--yellow); }

.button-group button:hover,
.web-container button:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }

.button-group button:active,
.web-container button:active { transform: translate(3px, 3px); box-shadow: 0 0 0 var(--ink); }

.multimodal-response,
.web-response {
    padding: 20px;
    background: var(--card);
    border: var(--bw) solid var(--ink);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    line-height: 1.8;
}

.multimodal-response { max-height: 520px; overflow-y: auto; }

.web-response:empty,
.multimodal-response:empty { display: none; }

.message-content {
    line-height: 1.75;
    font-weight: 500;
    white-space: pre-wrap;
    word-break: break-word;
}

.loading { text-align: center; padding: 20px; font-weight: 700; }

.error {
    padding: 14px 16px;
    font-weight: 700;
    color: white;
    background: var(--coral);
    border: var(--bw) solid var(--ink);
    border-radius: 12px;
}

footer {
    margin-top: 34px;
    text-align: center;
    font-size: 0.82em;
    font-weight: 600;
}

footer p {
    display: inline-block;
    padding: 7px 16px;
    background: var(--card);
    border: 2px solid var(--ink);
    border-radius: 999px;
    box-shadow: 2px 2px 0 var(--ink);
}

/* ===== 반응형 ===== */
@media (max-width: 720px) {
    body { padding: 18px 12px 28px; }
    header { padding: 20px 18px; margin-bottom: 26px; }
    header p { font-size: 0.88em; }
    .tabs { gap: 6px; padding: 0; }
    .tab-button { flex: 1; padding: 11px 6px; font-size: 0.85em; }
    .tab-content { padding: 14px; }
    .chat-messages { padding: 14px; }
    .chat-container { height: calc(100vh - 340px); min-height: 400px; }
    .message { max-width: 94%; }
    .multimodal-container { grid-template-columns: 1fr; }
    footer p { border-radius: 14px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}