:root {
    --bg: #fff8f4;
    --surface: #fcf2ea;
    --surface-low: #ffffff;
    --surface-high: #f1e6df;
    --border: #dec0b4;
    --ink: #1f1b17;
    --muted: #574239;
    --primary: #9c3f00;
    --primary-soft: #ffdbcb;
    --secondary: #516353;
    --secondary-soft: #d4e8d4;
    --radius: 0.25rem;
    --radius-lg: 0.5rem;
    --font-display: "Newsreader", Georgia, serif;
    --font-ui: "Work Sans", system-ui, sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, monospace;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
}

body {
    font-family: var(--font-ui);
    font-size: 15px;
    line-height: 1.55;
    color: var(--ink);
    background-color: var(--bg);
    background-image: radial-gradient(rgba(139, 114, 103, 0.05) 1px, transparent 0);
    background-size: 24px 24px;
}

.top-bar {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.info-btn {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border: none;
    border-radius: var(--radius-lg);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}

.info-btn:hover {
    background: var(--surface-high);
    color: var(--primary);
}

.info-modal {
    position: relative;
    width: min(28rem, calc(100% - 2rem));
    margin: auto;
    padding: 1.5rem 1.35rem 1.35rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-low);
    color: var(--ink);
    box-shadow: 0 8px 32px rgba(74, 68, 63, 0.18);
}

.info-modal::backdrop {
    background: rgba(31, 27, 23, 0.35);
    backdrop-filter: blur(3px);
}

.info-modal h2 {
    margin: 0 0 0.75rem;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
}

.info-modal p {
    margin: 0 0 0.85rem;
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--ink);
}

.info-modal p:last-child {
    margin-bottom: 0;
}

.info-modal a {
    color: var(--primary);
    font-weight: 500;
}

.info-close {
    position: absolute;
    top: 0.55rem;
    right: 0.65rem;
    border: none;
    background: transparent;
    color: var(--muted);
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
}

.top-bar h1 {
    margin: 0;
    font-family: var(--font-ui);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: -0.01em;
}

.meta {
    margin: 0.2rem 0 0;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: var(--secondary);
}

.status-dot {
    width: 0.4rem;
    height: 0.4rem;
    border-radius: 999px;
    background: var(--secondary);
}

.chat-container {
    width: min(44rem, 100%);
    margin: 0 auto;
    padding: 1.25rem 1rem 7rem;
}

.chat-stream {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.user-message,
.assistant-message {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1rem 1.1rem;
    background: var(--surface-low);
    box-shadow: 0 1px 3px rgba(74, 68, 63, 0.04);
}

.user-message {
    font-family: var(--font-display);
    font-size: 1.15rem;
    line-height: 1.4;
    color: var(--ink);
}

.user-message::before {
    content: "Query";
    display: block;
    margin-bottom: 0.45rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
}

.assistant-message {
    font-family: var(--font-display);
    font-size: 1.05rem;
    line-height: 1.65;
    white-space: pre-wrap;
    min-height: 3rem;
}

.assistant-message:empty::after {
    content: "▋";
    color: var(--primary);
    animation: cursor-pulse 1.05s infinite;
}

.assistant-message::before {
    content: "Finding";
    display: block;
    margin-bottom: 0.45rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--primary);
}

@keyframes cursor-pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0;
    }
}

.composer-dock {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0.75rem 1rem 1.1rem;
    background: linear-gradient(to top, var(--bg) 60%, transparent);
    pointer-events: none;
}

.input-container {
    pointer-events: auto;
    width: min(44rem, 100%);
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem;
    background: var(--surface-low);
    border: 1px solid var(--muted);
    border-radius: 0.75rem;
    box-shadow: 0 4px 16px -4px rgba(74, 68, 63, 0.12);
}

#question {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.65rem 0.75rem;
    font-family: var(--font-ui);
    font-size: 0.95rem;
    color: var(--ink);
    outline: none;
}

#question::placeholder {
    color: color-mix(in srgb, var(--muted) 70%, transparent);
}

#send {
    border: none;
    border-radius: var(--radius-lg);
    padding: 0.65rem 1.1rem;
    background: var(--primary);
    color: #fff;
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease, opacity 0.15s ease;
}

#send:hover {
    background: #c05410;
}

#send:active {
    opacity: 0.9;
}

#send:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

@media (max-width: 640px) {
    body {
        font-size: 14px;
    }

    .top-bar h1 {
        font-size: 0.95rem;
    }

    .meta {
        font-size: 0.65rem;
    }

    .user-message {
        font-size: 1.02rem;
        padding: 0.85rem 0.95rem;
    }

    .assistant-message {
        font-size: 0.95rem;
        line-height: 1.55;
        padding: 0.85rem 0.95rem;
    }

    .user-message::before,
    .assistant-message::before {
        font-size: 0.62rem;
    }

    #question {
        font-size: 0.88rem;
        padding: 0.55rem 0.65rem;
    }

    #send {
        font-size: 0.8rem;
        padding: 0.55rem 0.9rem;
    }

    .chat-container {
        padding: 1rem 0.85rem 6.5rem;
    }
}