/* =====================================================================
   LINE-inspired Chat UI for Streamlit
   Loaded by core/ui.py and injected via st.markdown(unsafe_allow_html=True)
   ===================================================================== */

/* ---------- Streamlit chrome cleanup ---------- */
#MainMenu, header[data-testid="stHeader"], footer { visibility: hidden; }
[data-testid="stToolbar"] { display: none !important; }
[data-testid="stDecoration"] { display: none !important; }

/* ---------- Wallpaper (LINE default-ish blue) ---------- */
.stApp {
    background:
        radial-gradient(circle at 20% 10%, rgba(255,255,255,0.08), transparent 40%),
        radial-gradient(circle at 80% 90%, rgba(255,255,255,0.06), transparent 45%),
        linear-gradient(180deg, #88a9c9 0%, #7799bb 100%);
    background-attachment: fixed;
    font-family: -apple-system, "Hiragino Sans", "Hiragino Kaku Gothic ProN",
                 "Yu Gothic", Meiryo, "Helvetica Neue", Arial, sans-serif;
}

/* Centered phone-like column */
.block-container {
    padding-top: 0.5rem;
    padding-bottom: 6.5rem;
    max-width: 720px;
}

/* ---------- Top header (sticky, LINE-style white bar) ---------- */
.line-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: linear-gradient(180deg, #ffffff 0%, #f6f7f9 100%);
    color: #1c1c1e;
    padding: 12px 18px;
    border-radius: 14px;
    margin: 4px 0 14px 0;
    font-weight: 700;
    text-align: center;
    font-size: 16px;
    letter-spacing: 0.02em;
    box-shadow: 0 2px 6px rgba(0,0,0,0.12), 0 0 0 1px rgba(0,0,0,0.04) inset;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}
.line-header::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #06c755;          /* LINE green status dot */
    box-shadow: 0 0 0 3px rgba(6,199,85,0.18);
    flex-shrink: 0;
}

/* ---------- Conversation rows ---------- */
.chat-row {
    display: flex;
    margin: 6px 0;
    align-items: flex-end;
    gap: 6px;
    animation: bubble-in 0.18s ease-out;
}
.chat-row.user      { justify-content: flex-end; }
.chat-row.assistant { justify-content: flex-start; }

@keyframes bubble-in {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Bubbles ---------- */
.bubble {
    position: relative;
    max-width: 70%;
    padding: 10px 14px;
    border-radius: 18px;
    font-size: 15px;
    line-height: 1.55;
    word-wrap: break-word;
    overflow-wrap: anywhere;
    box-shadow: 0 1px 1.5px rgba(0,0,0,0.08);
}

/* USER (right, LINE green) */
.bubble.user {
    background: #8de055;
    color: #102a06;
    border-bottom-right-radius: 4px;
}
.bubble.user::after {
    content: "";
    position: absolute;
    right: -6px;
    bottom: 0;
    width: 12px;
    height: 14px;
    background: #8de055;
    clip-path: polygon(0 0, 100% 100%, 0 100%);
    border-bottom-left-radius: 2px;
}

/* ASSISTANT (left, white) */
.bubble.assistant {
    background: #ffffff;
    color: #1c1c1e;
    border-bottom-left-radius: 4px;
}
.bubble.assistant::after {
    content: "";
    position: absolute;
    left: -6px;
    bottom: 0;
    width: 12px;
    height: 14px;
    background: #ffffff;
    clip-path: polygon(100% 0, 100% 100%, 0 100%);
    border-bottom-right-radius: 2px;
}

.bubble a { color: #1769aa; text-decoration: underline; }

/* ---------- Avatar ---------- */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #ffd1dc 0%, #ffb6c1 50%, #ff8fa3 100%);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
    border: 2px solid #ffffff;
    box-shadow: 0 1px 2px rgba(0,0,0,0.18);
    text-transform: uppercase;
    user-select: none;
}
.avatar-spacer { width: 40px; flex-shrink: 0; }

.assistant-block {
    display: flex;
    flex-direction: column;
    max-width: calc(100% - 52px);
}
.partner-name {
    font-size: 11.5px;
    color: #ffffff;
    margin: 2px 0 4px 6px;
    opacity: 0.95;
    font-weight: 500;
    text-shadow: 0 1px 1px rgba(0,0,0,0.15);
}

/* ---------- System notice pill ---------- */
.system-note {
    text-align: center;
    color: #ffffff;
    font-size: 12px;
    margin: 14px auto;
    background: rgba(0,0,0,0.22);
    padding: 5px 14px;
    border-radius: 14px;
    width: fit-content;
    backdrop-filter: blur(2px);
}

/* ---------- Typing indicator ---------- */
.bubble.typing {
    display: flex;
    gap: 5px;
    padding: 14px 18px;
    align-items: center;
}
.bubble.typing span {
    width: 7px;
    height: 7px;
    background: #b3b3b3;
    border-radius: 50%;
    display: inline-block;
    animation: typing-bounce 1.3s infinite ease-in-out;
}
.bubble.typing span:nth-child(2) { animation-delay: 0.18s; }
.bubble.typing span:nth-child(3) { animation-delay: 0.36s; }
@keyframes typing-bounce {
    0%, 60%, 100% { transform: translateY(0);    opacity: 0.4; }
    30%           { transform: translateY(-5px); opacity: 1;   }
}

/* =====================================================================
   Streamlit widget restyling — make it FEEL like LINE
   ===================================================================== */

/* Sidebar look (used on setup screen) */
[data-testid="stSidebar"] {
    background: #ffffff;
    border-right: 1px solid rgba(0,0,0,0.06);
}

/* Headings */
.stApp h1, .stApp h2, .stApp h3, .stApp h4 {
    color: #ffffff;
    text-shadow: 0 1px 2px rgba(0,0,0,0.18);
}

/* Setup-screen subheaders should still pop on the blue bg */
.stApp .stSubheader, .stApp [data-testid="stMarkdownContainer"] h3 {
    color: #ffffff;
}

/* Caption text */
.stApp [data-testid="stCaptionContainer"],
.stApp .stCaption {
    color: rgba(255,255,255,0.85);
}

/* Text inputs / textareas — white pill cards */
.stTextInput > div > div > input,
.stTextArea textarea {
    background: #ffffff !important;
    border: 1px solid rgba(0,0,0,0.08) !important;
    border-radius: 12px !important;
    padding: 10px 14px !important;
    font-size: 15px !important;
    color: #1c1c1e !important;
    box-shadow: 0 1px 2px rgba(0,0,0,0.06) !important;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.stTextInput > div > div > input:focus,
.stTextArea textarea:focus {
    border-color: #06c755 !important;
    box-shadow: 0 0 0 3px rgba(6,199,85,0.18) !important;
    outline: none !important;
}

/* Input labels */
.stTextInput label, .stTextArea label, .stFileUploader label {
    color: #ffffff !important;
    font-weight: 500 !important;
}

/* File uploader card */
[data-testid="stFileUploader"] section {
    background: rgba(255,255,255,0.95) !important;
    border: 1.5px dashed rgba(6,199,85,0.5) !important;
    border-radius: 12px !important;
}

/* Buttons — LINE green primary */
.stButton > button {
    background: #ffffff;
    color: #1c1c1e;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 999px;
    padding: 0.55rem 1.4rem;
    font-weight: 600;
    font-size: 14.5px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08);
    transition: transform 0.05s, box-shadow 0.15s, background 0.15s;
}
.stButton > button:hover {
    background: #f5f5f5;
    box-shadow: 0 2px 5px rgba(0,0,0,0.12);
}
.stButton > button:active { transform: translateY(1px); }

.stButton > button[kind="primary"],
.stButton > button[data-testid="baseButton-primary"] {
    background: #06c755 !important;
    color: #ffffff !important;
    border: none !important;
    box-shadow: 0 2px 6px rgba(6,199,85,0.35) !important;
}
.stButton > button[kind="primary"]:hover {
    background: #05b34c !important;
}

/* Divider */
hr, [data-testid="stDivider"] {
    border-color: rgba(255,255,255,0.25) !important;
    opacity: 0.6;
}

/* Alerts */
.stAlert {
    border-radius: 12px !important;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08) !important;
}

/* ---------- Chat input at the bottom — make it a white LINE bar ---------- */
[data-testid="stChatInput"] {
    background: rgba(247, 247, 247, 0.96) !important;
    border-top: 1px solid rgba(0,0,0,0.08) !important;
    backdrop-filter: blur(8px);
    padding: 8px 12px !important;
}
[data-testid="stChatInput"] textarea {
    background: #ffffff !important;
    border: 1px solid rgba(0,0,0,0.1) !important;
    border-radius: 22px !important;
    padding: 10px 16px !important;
    font-size: 15px !important;
    color: #1c1c1e !important;
}
[data-testid="stChatInput"] textarea:focus {
    border-color: #06c755 !important;
    box-shadow: 0 0 0 2px rgba(6,199,85,0.2) !important;
    outline: none !important;
}
[data-testid="stChatInput"] button {
    background: #06c755 !important;
    border-radius: 50% !important;
    color: #ffffff !important;
}
[data-testid="stChatInput"] button:hover { background: #05b34c !important; }
[data-testid="stChatInput"] button svg { fill: #ffffff !important; }

/* Spinner color tweak */
.stSpinner > div { border-top-color: #06c755 !important; }

/* ---------- Mobile tweaks ---------- */
@media (max-width: 480px) {
    .block-container { padding-left: 0.6rem; padding-right: 0.6rem; }
    .bubble { max-width: 78%; font-size: 14.5px; }
    .avatar, .avatar-spacer { width: 36px; height: 36px; }
    .assistant-block { max-width: calc(100% - 46px); }
}