/* ============================================
   BioRAG Medical Assistant - Light Medical Theme
   ============================================ */

:root {
    --bg: #f0f5ff;
    --bg-white: #ffffff;
    --bg-sidebar: #f8faff;
    --accent: #2563eb;
    --accent-light: #dbeafe;
    --accent-hover: #1d4ed8;
    --teal: #0d9488;
    --green: #059669;
    --green-light: #d1fae5;
    --amber: #d97706;
    --amber-light: #fef3c7;
    --red: #dc2626;
    --red-light: #fee2e2;
    --text: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow: 0 1px 4px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 12px rgba(37,99,235,0.1);
    --radius: 12px;
}

/* === Animations === */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideIn {
    from { opacity: 0; transform: translateX(-8px); }
    to { opacity: 1; transform: translateX(0); }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* === Global === */
.stApp {
    background: var(--bg) !important;
}

/* === Scrollbar === */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* === Text === */
.stApp h1, .stApp h2, .stApp h3 {
    color: var(--text) !important;
    font-weight: 700 !important;
}
.stApp p, .stApp span, .stApp label, .stApp li, .stApp div {
    color: var(--text);
}
.stCaption, .stApp .stCaption p {
    color: var(--text-muted) !important;
}

/* === Sidebar === */
section[data-testid="stSidebar"] {
    background: var(--bg-white) !important;
    border-right: 1px solid var(--border) !important;
    animation: fadeIn 0.5s ease;
}
section[data-testid="stSidebar"] * {
    color: var(--text) !important;
}
section[data-testid="stSidebar"] .stCaption p,
section[data-testid="stSidebar"] .stCaption {
    color: var(--text-muted) !important;
}
section[data-testid="stSidebar"] hr {
    border-color: var(--border) !important;
}
section[data-testid="stSidebar"] .stButton button {
    background: var(--accent) !important;
    color: white !important;
    border: none !important;
    border-radius: var(--radius) !important;
    padding: 0.5rem 1rem !important;
    font-weight: 600 !important;
    width: 100%;
    transition: all 0.25s ease !important;
}
section[data-testid="stSidebar"] .stButton button:hover {
    background: var(--accent-hover) !important;
    box-shadow: var(--shadow-hover) !important;
    transform: translateY(-1px) !important;
}

/* === Chat Messages === */
.stChatMessage {
    background: var(--bg-white) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    padding: 1rem 1.2rem !important;
    margin-bottom: 0.75rem !important;
    box-shadow: var(--shadow) !important;
    animation: fadeInUp 0.35s ease;
    transition: box-shadow 0.2s ease !important;
}
.stChatMessage:hover {
    box-shadow: var(--shadow-hover) !important;
}
.stChatMessage p, .stChatMessage li, .stChatMessage span {
    color: var(--text) !important;
    line-height: 1.7 !important;
    font-size: 0.93rem !important;
}
.stChatMessage .stMarkdown { color: var(--text) !important; }
.stChatMessage .stMarkdown strong { color: var(--accent) !important; }
.stChatMessage .stCaption p { color: var(--text-muted) !important; }

.stChatMessage [data-testid="chatAvatarIcon-user"] {
    background: var(--accent) !important;
}
.stChatMessage [data-testid="chatAvatarIcon-assistant"] {
    background: var(--teal) !important;
}

/* === Chat Input === */
[data-testid="stChatInput"],
[data-testid="stChatInput"] > div,
.stChatInput {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
    outline: none !important;
}
[data-testid="stBottom"] > div {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
}
.stChatInput textarea, [data-testid="stChatInputTextArea"] {
    background: var(--bg-white) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    color: var(--text) !important;
    font-size: 0.93rem !important;
    padding: 0.8rem 1rem !important;
    transition: border-color 0.2s ease, box-shadow 0.2s ease !important;
}
.stChatInput textarea:focus, [data-testid="stChatInputTextArea"]:focus {
    border-color: var(--accent) !important;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.12) !important;
}
.stChatInput button, [data-testid="stChatInputSubmitButton"] {
    display: none !important;
}

/* === Expander === */
[data-testid="stExpander"] {
    border: 1px solid var(--border) !important;
    border-radius: var(--radius) !important;
    background: var(--bg-white) !important;
    animation: fadeIn 0.3s ease;
}
[data-testid="stExpander"] details { border: none !important; }
[data-testid="stExpander"] summary {
    color: var(--text) !important;
    font-weight: 500 !important;
    padding: 0.7rem 1rem !important;
    transition: color 0.2s ease !important;
}
[data-testid="stExpander"] summary:hover { color: var(--accent) !important; }

/* === Text Area (sources) === */
.stTextArea textarea {
    background: var(--bg) !important;
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
    color: var(--text-secondary) !important;
    font-size: 0.82rem !important;
    line-height: 1.6 !important;
}

/* === Divider === */
hr {
    border-color: var(--border) !important;
    opacity: 0.7;
}

/* === Spinner === */
.stSpinner > div > span {
    color: var(--text-secondary) !important;
    animation: pulse 1.5s ease infinite;
}

/* === Alert boxes === */
.stAlert {
    border-radius: var(--radius) !important;
    padding: 0.8rem 1rem !important;
    animation: slideIn 0.35s ease;
}

/* === Footer === */
.stApp > footer { display: none !important; }

/* === Layout === */
.main .block-container {
    max-width: 850px !important;
    padding: 1.5rem 1rem !important;
}

[data-testid="stBottom"] {
    background: linear-gradient(180deg, transparent 0%, var(--bg) 40%) !important;
}