static/styles.css

/* ============================================================
   Web3 Research Co-Pilot — Styles
   Minimalist professional dark UI with Inter font
   ============================================================ */
/* CSS Variables */
:root {
    --primary:       #6366f1;
    --primary-dark:  #4f46e5;
    --primary-glow:  rgba(99,102,241,0.15);
    --accent:        #22d3ee;
    --bg:            #0d0d14;
    --surface:       #13131f;
    --surface-2:     #1c1c2e;
    --surface-3:     #26263a;
    --text:          #f1f5f9;
    --text-2:        #94a3b8;
    --text-3:        #64748b;
    --border:        rgba(255,255,255,0.07);
    --border-2:      rgba(255,255,255,0.11);
    --success:       #10b981;
    --warning:       #f59e0b;
    --error:         #ef4444;
    --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
    --shadow:        0 4px 20px rgba(0,0,0,0.45);
    --radius-sm:     6px;
    --radius:        10px;
    --radius-lg:     16px;
    --radius-xl:     20px;
}
[data-theme="light"] {
    --bg:        #f6f7fb;
    --surface:   #ffffff;
    --surface-2: #f1f3f9;
    --surface-3: #e5e8f0;
    --text:      #0f172a;
    --text-2:    #475569;
    --text-3:    #94a3b8;
    --border:    rgba(0,0,0,0.06);
    --border-2:  rgba(0,0,0,0.10);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow:    0 4px 20px rgba(0,0,0,0.10);
}
*, *::before, *::after {
    margin: 0; padding: 0; box-sizing: border-box;
}
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.25s, color 0.25s;
}
/* App Shell */
.app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 860px;
    margin: 0 auto;
    border-left: 1px solid var(--border);
    border-right: 1px solid var(--border);
}
/* HEADER */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    height: 52px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
    gap: 0.75rem;
    z-index: 100;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    min-width: 0;
}
.logo-icon { flex-shrink: 0; }
.header-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.brand {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    flex-shrink: 0;
}
/* Status Badge */
.status-badge {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.625rem;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--surface-2);
    color: var(--text-3);
    user-select: none;
}
.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-3);
    flex-shrink: 0;
    transition: background 0.3s, box-shadow 0.3s;
}
.status-badge.online  .status-dot { background: var(--success); box-shadow: 0 0 0 2px rgba(16,185,129,0.2); }
.status-badge.offline .status-dot { background: var(--error); }
.status-badge.checking .status-dot { background: var(--warning); animation: pulse-dot 1.4s ease-in-out infinite; }
.status-badge.online { color: var(--text-2); }
@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}
/* Model Toggle */
.model-select {
    display: flex;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 2px;
    gap: 2px;
}
.model-btn {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.28rem 0.625rem;
    border: none;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--text-3);
    background: transparent;
    cursor: pointer;
    transition: all 0.18s;
    white-space: nowrap;
    font-family: inherit;
}
.model-btn.active {
    background: var(--surface);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}
.model-btn:hover:not(.active) { color: var(--text-2); }
/* Icon Button */
.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    color: var(--text-3);
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.18s;
    flex-shrink: 0;
}
.icon-btn:hover { background: var(--surface-3); color: var(--text); }
/* MAIN LAYOUT */
.main {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.chat-wrap {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}
/* CHAT MESSAGES */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    scroll-behavior: smooth;
    background: var(--bg);
}
.chat-messages::-webkit-scrollbar       { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 2px; }
.chat-messages::-webkit-scrollbar-thumb:hover { background: var(--text-3); }
/* Welcome Screen */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1rem 1.5rem;
    flex: 1;
    animation: fadeIn 0.4s ease;
}
.welcome-icon { margin-bottom: 1.25rem; opacity: 0.85; }
.welcome-screen h2 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--text);
    letter-spacing: -0.02em;
}
.welcome-screen p {
    color: var(--text-3);
    font-size: 0.875rem;
    margin-bottom: 1.75rem;
}
.example-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    max-width: 580px;
}
.chip {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.425rem 0.875rem;
    background: var(--surface);
    border: 1px solid var(--border-2);
    border-radius: 20px;
    color: var(--text-2);
    font-size: 0.78rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.18s;
    font-family: inherit;
}
.chip:hover {
    background: var(--surface-2);
    border-color: var(--primary);
    color: var(--text);
    transform: translateY(-1px);
}
.chip i { color: var(--primary); font-size: 0.72rem; }
/* MESSAGE BUBBLES */
.message {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    animation: msgSlide 0.28s ease;
}
@keyframes msgSlide {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
.message.user      { align-items: flex-end; }
.message.assistant { align-items: flex-start; }
.message-bubble {
    max-width: 82%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    line-height: 1.65;
    word-break: break-word;
    overflow-wrap: anywhere;
}
.message.user .message-bubble {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 10px rgba(99,102,241,0.25);
}
.message.assistant .message-bubble {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text);
    border-bottom-left-radius: 4px;
    max-width: 94%;
}
.message-time {
    font-size: 0.67rem;
    color: var(--text-3);
    padding: 0 0.25rem;
    font-variant-numeric: tabular-nums;
}
/* MARKDOWN CONTENT */
.md-content { line-height: 1.7; }
.md-content > *:first-child { margin-top: 0 !important; }
.md-content > *:last-child  { margin-bottom: 0 !important; }
.md-content h1, .md-content h2,
.md-content h3, .md-content h4,
.md-content h5, .md-content h6 {
    font-weight: 600;
    line-height: 1.3;
    margin: 1rem 0 0.4rem;
}
.md-content h1 { font-size: 1.2rem;  color: var(--accent); }
.md-content h2 { font-size: 1.05rem; color: var(--accent); border-bottom: 1px solid var(--border); padding-bottom: 0.3rem; }
.md-content h3 { font-size: 0.95rem; color: var(--primary); }
.md-content h4 { font-size: 0.875rem; color: var(--text-2); }
.md-content p { margin: 0.5rem 0; }
.md-content ul, .md-content ol {
    margin: 0.5rem 0;
    padding-left: 1.4rem;
}
.md-content li { margin: 0.2rem 0; }
.md-content ul li::marker { color: var(--accent); }
.md-content ol li::marker { color: var(--accent); font-weight: 600; }
.md-content strong { font-weight: 600; color: var(--text); }
.md-content em     { color: var(--text-2); font-style: italic; }
.md-content code {
    font-family: 'JetBrains Mono', 'SF Mono', Consolas, 'Courier New', monospace;
    font-size: 0.8rem;
    background: var(--surface-2);
    border: 1px solid var(--border-2);
    padding: 0.12rem 0.4rem;
    border-radius: 4px;
    color: var(--accent);
}
.md-content pre {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.875rem 1rem;
    overflow-x: auto;
    margin: 0.75rem 0;
}
.md-content pre code {
    background: none;
    border: none;
    padding: 0;
    color: var(--text);
    font-size: 0.8rem;
}
.hljs { background: transparent !important; padding: 0 !important; }
.md-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.75rem 0;
    font-size: 0.82rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.md-content th {
    background: var(--surface-2);
    color: var(--text-2);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.5rem 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.md-content td {
    padding: 0.45rem 0.75rem;
    border-top: 1px solid var(--border);
    color: var(--text);
}
.md-content tr:hover td { background: rgba(255,255,255,0.015); }
.md-content blockquote {
    border-left: 3px solid var(--primary);
    background: var(--primary-glow);
    padding: 0.6rem 0.875rem;
    margin: 0.75rem 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-2);
}
.md-content a { color: var(--accent); text-decoration: none; border-bottom: 1px solid transparent; transition: border-color 0.15s; }
.md-content a:hover { border-bottom-color: var(--accent); }
.md-content hr { border: none; border-top: 1px solid var(--border); margin: 1rem 0; }
/* User bubble overrides */
.message.user .md-content h1,
.message.user .md-content h2,
.message.user .md-content h3,
.message.user .md-content h4 { color: rgba(255,255,255,0.9); border-color: rgba(255,255,255,0.2); }
.message.user .md-content strong { color: #fff; }
.message.user .md-content em    { color: rgba(255,255,255,0.8); }
.message.user .md-content code  {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.2);
    color: #fff;
}
.message.user .md-content ul li::marker,
.message.user .md-content ol li::marker { color: rgba(255,255,255,0.7); }
/* Sources */
.sources-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}
.sources-label {
    font-size: 0.68rem;
    color: var(--text-3);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.source-tag {
    font-size: 0.7rem;
    padding: 0.18rem 0.55rem;
    background: rgba(99,102,241,0.08);
    border: 1px solid rgba(99,102,241,0.2);
    border-radius: 20px;
    color: var(--primary);
    font-weight: 500;
}
.viz-container {
    margin-top: 0.875rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    width: 100%;
}
/* THINKING / TOOL STEPS */
.thinking-bubble {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    border-bottom-left-radius: 4px;
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
    max-width: 90%;
    min-width: 220px;
}
.thinking-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-2);
    margin-bottom: 0.5rem;
}
.thinking-spinner {
    width: 13px;
    height: 13px;
    border: 2px solid var(--border-2);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
    flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.thinking-label { font-weight: 500; font-size: 0.8rem; }
.tool-steps { display: flex; flex-direction: column; gap: 0.2rem; }
.tool-step {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-3);
    padding: 0.15rem 0;
    animation: msgSlide 0.2s ease;
}
.tool-step i { color: var(--primary); width: 13px; text-align: center; font-size: 0.7rem; }
.tool-step.done i { color: var(--success); }
.progress-strip {
    margin-top: 0.625rem;
    height: 2px;
    background: var(--border);
    border-radius: 1px;
    overflow: hidden;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 1px;
    transition: width 0.4s ease;
    width: 0%;
}
/* INPUT AREA */
.input-area {
    padding: 0.875rem 1.25rem 1rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
}
.input-box {
    display: flex;
    align-items: flex-end;
    gap: 0.625rem;
    background: var(--surface-2);
    border: 1.5px solid var(--border-2);
    border-radius: var(--radius-xl);
    padding: 0.55rem 0.625rem 0.55rem 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.input-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}
.input-field {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text);
    font-size: 0.875rem;
    font-family: 'Inter', sans-serif;
    line-height: 1.55;
    resize: none;
    overflow-y: hidden;
    max-height: 130px;
    padding: 0;
    min-height: 22px;
}
.input-field::placeholder { color: var(--text-3); }
.input-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}
.char-count {
    font-size: 0.65rem;
    color: var(--text-3);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}
.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--primary);
    border: none;
    border-radius: var(--radius-sm);
    color: #fff;
    cursor: pointer;
    font-size: 0.75rem;
    transition: all 0.18s;
    flex-shrink: 0;
    font-family: inherit;
}
.send-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 3px 10px rgba(99,102,241,0.35);
}
.send-btn:active { transform: translateY(0); }
.send-btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; box-shadow: none; }
.input-hint {
    font-size: 0.65rem;
    color: var(--text-3);
    margin-top: 0.4rem;
    padding-left: 0.25rem;
}
.input-hint kbd {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    background: var(--surface-3);
    border: 1px solid var(--border-2);
    border-radius: 3px;
    padding: 0.05rem 0.3rem;
    color: var(--text-2);
}
/* TOAST NOTIFICATION */
.toast {
    position: fixed;
    top: 0.875rem;
    right: 0.875rem;
    background: var(--surface);
    border: 1px solid var(--border-2);
    border-radius: var(--radius);
    padding: 0.55rem 0.875rem;
    font-size: 0.78rem;
    color: var(--text-2);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    transform: translateY(-6px) scale(0.97);
    transition: all 0.2s cubic-bezier(0.2, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: var(--shadow);
    pointer-events: none;
    max-width: 300px;
}
.toast.show { opacity: 1; transform: translateY(0) scale(1); }
.toast-icon { font-size: 0.75rem; flex-shrink: 0; }
.toast.processing { border-color: rgba(99,102,241,0.4); }
.toast.processing .toast-icon { color: var(--primary); }
.toast.success    { border-color: rgba(16,185,129,0.4); }
.toast.success    .toast-icon { color: var(--success); }
.toast.error      { border-color: rgba(239,68,68,0.4); }
.toast.error      .toast-icon { color: var(--error); }
.toast.warning    { border-color: rgba(245,158,11,0.4); }
.toast.warning    .toast-icon { color: var(--warning); }
/* LIGHT THEME OVERRIDES */
[data-theme="light"] .md-content pre {
    background: #f6f8fa;
    border-color: #d0d7de;
}
[data-theme="light"] .md-content code {
    background: rgba(175,184,193,0.2);
    border-color: rgba(175,184,193,0.4);
    color: #0550ae;
}
[data-theme="light"] .message.assistant .message-bubble {
    background: #fff;
    border-color: rgba(0,0,0,0.08);
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
[data-theme="light"] .thinking-bubble {
    background: #fff;
    border-color: rgba(0,0,0,0.08);
}
[data-theme="light"] .chat-messages { background: var(--bg); }
/* RESPONSIVE */
@media (max-width: 640px) {
    .app { max-width: 100%; border: none; }
    .header { padding: 0 1rem; height: 48px; }
    .header-title { font-size: 0.82rem; }
    .status-badge { display: none; }
    .chat-messages { padding: 1rem; }
    .message-bubble { max-width: 92%; font-size: 0.85rem; }
    .message.assistant .message-bubble { max-width: 98%; }
    .input-area { padding: 0.75rem 0.875rem 0.875rem; }
    .example-chips { gap: 0.375rem; }
    .chip { font-size: 0.75rem; padding: 0.375rem 0.75rem; }
}