web/static/css/style.css

/* Eurus - Premium Interface with Eye Comfort */
/* Inspired by Google Material, Apple HIG, and modern design systems */

/* ===== DARK THEME (Refined Neosynth) ===== */
:root,
[data-theme="dark"] {
    /* Softer dark base - not pure black for reduced eye strain */
    --bg-primary: #0f1419;
    --bg-secondary: #15202b;
    --bg-tertiary: #1c2938;

    /* Refined neon - softer cyan/purple, easier on eyes */
    --accent-primary: #1d9bf0;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #22d3ee;

    /* High contrast text - WCAG AA compliant */
    --text-primary: #e7e9ea;
    --text-secondary: #8899a6;
    --text-muted: #5c6e7e;

    /* Subtle glass effect */
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.1);

    /* Messages */
    --message-user-bg: linear-gradient(135deg, rgba(29, 155, 240, 0.12), rgba(139, 92, 246, 0.08));
    --message-user-border: rgba(29, 155, 240, 0.25);
    --message-assistant-bg: rgba(255, 255, 255, 0.04);
    --message-assistant-border: rgba(255, 255, 255, 0.08);

    /* Code - rich dark */
    --code-bg: #0d1117;

    /* Refined glow - subtle, not overwhelming */
    --glow-primary: 0 2px 12px rgba(29, 155, 240, 0.2);
    --glow-secondary: 0 2px 12px rgba(139, 92, 246, 0.15);

    /* Subtle ambient gradient */
    --bg-gradient:
        radial-gradient(ellipse at 50% 0%, rgba(29, 155, 240, 0.04) 0%, transparent 50%);

    /* Focus ring */
    --focus-ring: 0 0 0 2px rgba(29, 155, 240, 0.5);
}

/* ===== LIGHT THEME (Clean & Professional) ===== */
[data-theme="light"] {
    /* Warm white - easier than pure white */
    --bg-primary: #f7f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #eff3f4;

    /* Professional blue - Google-inspired */
    --accent-primary: #1a73e8;
    --accent-secondary: #5f6368;
    --accent-tertiary: #34a853;

    /* High contrast text */
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-muted: #9aa0a6;

    /* Soft shadows, minimal borders */
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.08);

    /* Messages - clean and minimal */
    --message-user-bg: linear-gradient(135deg, rgba(26, 115, 232, 0.08), rgba(26, 115, 232, 0.04));
    --message-user-border: rgba(26, 115, 232, 0.15);
    --message-assistant-bg: #ffffff;
    --message-assistant-border: rgba(0, 0, 0, 0.06);

    /* Code - readable dark */
    --code-bg: #1f2937;

    /* Soft elevation shadows */
    --glow-primary: 0 1px 3px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(26, 115, 232, 0.08);
    --glow-secondary: 0 1px 3px rgba(0, 0, 0, 0.1);

    /* Clean background */
    --bg-gradient: none;

    /* Focus ring */
    --focus-ring: 0 0 0 2px rgba(26, 115, 232, 0.4);
}

/* ===== BASE STYLES ===== */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.5;
    background: var(--bg-primary);
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    transition: background-color 0.2s ease, color 0.2s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== HEADER ===== */
header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--glass-border);
    padding: 0.75rem 1.25rem;
    transition: background-color 0.2s ease;
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

header nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

header nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: 0.5rem;
    transition: all 0.15s ease;
}

header nav a:hover {
    color: var(--accent-primary);
    background: var(--glass-bg);
}

.logo {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--accent-primary);
    letter-spacing: -0.01em;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    padding: 0.5rem;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
}

.theme-toggle:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.theme-icon {
    font-size: 1rem;
    line-height: 1;
}

/* Connection status */
.status-badge {
    padding: 0.375rem 0.625rem;
    border-radius: 1rem;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.status-badge.connected {
    background: rgba(52, 168, 83, 0.12);
    color: #34a853;
}

.status-badge.disconnected {
    background: rgba(234, 67, 53, 0.12);
    color: #ea4335;
}

.status-badge.connecting {
    background: rgba(251, 188, 4, 0.12);
    color: #f9ab00;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

/* ===== MAIN CONTENT ===== */
main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Chat container */
.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 110px);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
    padding: 0 1rem;
}

/* Messages area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.875rem;
}

/* ===== MESSAGE STYLES ===== */
.message {
    max-width: 85%;
    padding: 0.875rem 1rem;
    border-radius: 1rem;
    line-height: 1.6;
    font-size: 0.9375rem;
    animation: messageAppear 0.2s ease-out;
}

@keyframes messageAppear {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.user-message {
    background: var(--message-user-bg);
    border: 1px solid var(--message-user-border);
    align-self: flex-end;
    border-bottom-right-radius: 0.25rem;
}

.assistant-message {
    background: var(--message-assistant-bg);
    border: 1px solid var(--message-assistant-border);
    align-self: flex-start;
    border-bottom-left-radius: 0.25rem;
}

[data-theme="light"] .assistant-message {
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.system-message {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    align-self: center;
    max-width: 90%;
    font-size: 0.875rem;
    border-radius: 0.75rem;
}

.system-message h3 {
    margin: 0 0 0.5rem 0;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.thinking-message {
    background: transparent;
    align-self: flex-start;
    padding: 0.5rem;
    border: none;
}

.error-message {
    background: rgba(234, 67, 53, 0.1);
    border: 1px solid rgba(234, 67, 53, 0.25);
    align-self: center;
    color: #ea4335;
}

.message-header {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: 0.375rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.avatar-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    object-fit: cover;
}





.message-role {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--accent-primary);
}

.message-content {
    word-wrap: break-word;
}

.message-content p {
    margin: 0 0 0.625rem 0;
}

.message-content p:last-child {
    margin-bottom: 0;
}

.message-content pre {
    margin: 0.625rem 0;
    padding: 0.875rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    background: var(--code-bg);
    border: 1px solid var(--glass-border);
    font-size: 0.8125rem;
    line-height: 1.5;
}

.message-content code {
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', monospace;
    font-size: 0.8125rem;
}

.message-content ul,
.message-content ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}

/* ===== PLOT DISPLAY ===== */
.message-plots {
    margin-top: 0.875rem;
}

.plot-figure {
    margin: 0;
    display: block;
    max-width: 100%;
}

.plot-figure img {
    max-width: 100%;
    width: auto;
    height: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all 0.15s ease;
}

.plot-figure img:hover {
    box-shadow: var(--glow-primary);
}

.plot-actions {
    margin-top: 0.625rem;
    display: flex;
    gap: 0.5rem;
}

.plot-actions button {
    padding: 0.5rem 0.875rem;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--glass-border);
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.plot-actions button:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* Plot code display */
.plot-code {
    margin-top: 0.625rem;
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.plot-code pre {
    margin: 0;
    padding: 0.875rem;
    background: var(--code-bg);
    overflow-x: auto;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.plot-code code {
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', monospace;
    color: #e6edf3;
}

/* ===== INPUT AREA ===== */
.chat-input-container {
    padding: 1rem 0;
    border-top: 1px solid var(--glass-border);
    background: var(--bg-primary);
}

.chat-form {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

.chat-form textarea {
    flex: 1;
    min-height: 2.75rem;
    max-height: 8rem;
    padding: 0.75rem 1rem;
    border: 1px solid var(--glass-border);
    border-radius: 1.5rem;
    font-size: 0.9375rem;
    font-family: inherit;
    resize: none;
    line-height: 1.4;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.15s ease;
}

.chat-form textarea::placeholder {
    color: var(--text-muted);
}

.chat-form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--focus-ring);
}

.chat-form button {
    padding: 0.75rem 1.25rem;
    background: var(--accent-primary);
    color: #ffffff;
    border: none;
    border-radius: 1.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
}

.chat-form button:hover {
    filter: brightness(1.1);
    box-shadow: var(--glow-primary);
}

.chat-form button:focus {
    outline: none;
    box-shadow: var(--focus-ring);
}

.chat-form button:disabled {
    background: var(--text-muted);
    cursor: not-allowed;
    box-shadow: none;
    filter: none;
}

.input-hints {
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.input-hints kbd {
    background: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    border: 1px solid var(--glass-border);
    font-size: 0.6875rem;
    font-family: inherit;
}

/* ===== FOOTER ===== */
footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--glass-border);
    padding: 0.625rem 1rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== MODAL ===== */
dialog {
    border: none;
    border-radius: 0.75rem;
    padding: 0;
    max-width: 560px;
    width: 90%;
    background: var(--bg-secondary);
    color: var(--text-primary);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

dialog::backdrop {
    background: rgba(0, 0, 0, 0.5);
}

dialog header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--glass-border);
}

dialog header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

dialog .close-modal {
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    line-height: 1;
    border-radius: 0.25rem;
    transition: all 0.15s ease;
}

dialog .close-modal:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

#cache-content {
    padding: 1rem 1.25rem;
    max-height: 400px;
    overflow-y: auto;
}

#cache-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
}

#cache-content th,
#cache-content td {
    padding: 0.625rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

#cache-content th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.cache-download-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 0.375rem;
    padding: 0.375rem 0.625rem;
    cursor: pointer;
    font-size: 0.8125rem;
    transition: all 0.15s ease;
    color: var(--text-secondary);
}

.cache-download-btn:hover:not(:disabled) {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: rgba(26, 115, 232, 0.08);
}

.cache-download-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

.cache-total {
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: right;
}

/* ===== TYPING INDICATOR ===== */
.typing-indicator {
    display: flex;
    gap: 0.25rem;
    padding: 0.5rem;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 50%;
    animation: typing 1.2s infinite ease-in-out;
}

.typing-indicator span:nth-child(1) {
    animation-delay: 0s;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.15s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.3s;
}

@keyframes typing {

    0%,
    60%,
    100% {
        transform: translateY(0);
        opacity: 0.4;
    }

    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

/* ===== STATUS INDICATOR ===== */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.625rem 0.875rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-primary);
    animation: statusAppear 0.2s ease-out;
}

.status-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--glass-border);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.status-text {
    font-weight: 500;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes statusAppear {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 4px;
    border: 2px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
    .chat-container {
        padding: 0 0.75rem;
    }

    .message {
        max-width: 92%;
    }

    .chat-form button {
        padding: 0.75rem 1rem;
    }

    header nav ul {
        gap: 0.5rem;
    }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard users */
:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

/* ===== SELECTION ===== */
::selection {
    background: rgba(29, 155, 240, 0.25);
}

[data-theme="light"] ::selection {
    background: rgba(26, 115, 232, 0.2);
}

/* ===== API KEYS PANEL ===== */
.api-keys-panel {
    margin: 0 auto 16px;
    max-width: 480px;
    background: var(--bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
}

.api-keys-header {
    padding: 12px 16px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
}

.api-keys-body {
    padding: 16px;
}

.api-keys-note {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.4;
}

.api-key-field {
    margin-bottom: 12px;
}

.api-key-field label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.api-key-field .required {
    color: #ef4444;
}

.api-key-field input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--glass-border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: monospace;
    font-size: 13px;
    box-sizing: border-box;
}

.api-key-field input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--focus-ring);
}

.save-keys-btn {
    width: 100%;
    padding: 10px;
    background: var(--accent-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 4px;
}

.save-keys-btn:hover {
    opacity: 0.9;
}

.save-keys-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== ARRAYLAKE SNIPPET (in-message) ===== */
.arraylake-snippet-section {
    margin-top: 0.75rem;
}

.arraylake-actions {
    display: flex;
    gap: 0.5rem;
}

.arraylake-btn {
    padding: 0.5rem 0.875rem;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid var(--glass-border);
    border-radius: 0.375rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.arraylake-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.arraylake-code {
    margin-top: 0.5rem;
    border-radius: 0.5rem;
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.arraylake-code pre {
    margin: 0;
    padding: 0.875rem;
    background: var(--code-bg);
    overflow-x: auto;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.arraylake-code code {
    font-family: 'SF Mono', Monaco, Consolas, 'Liberation Mono', monospace;
}

.copy-snippet-btn {
    display: block;
    margin: 0;
    padding: 0.5rem 0.875rem;
    width: 100%;
    font-size: 0.75rem;
    font-weight: 500;
    border: none;
    border-top: 1px solid var(--glass-border);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: center;
}

.copy-snippet-btn:hover {
    color: var(--accent-primary);
    background: var(--bg-secondary);
}