@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;700&display=swap');

:root {
    --background: #0d1117;
    --foreground: #c9d1d9;
    --accent: #58a6ff;
    --green: #3fb950;
    --border: #30363d;
}

* {
    box-sizing: border-box;
}

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

body {
    background-color: var(--background);
    color: var(--foreground);
    font-family: 'Fira Code', monospace;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    font-size: 16px;
}

#container {
    width: 100%;
    max-width: 600px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
}

header h1 {
    color: var(--accent);
    margin: 0;
    font-weight: 700;
}

header p {
    color: var(--foreground);
    opacity: 0.8;
    margin-top: 0.5rem;
}

main {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

#scan-btn {
    background-color: var(--accent);
    color: var(--background);
    border: none;
    padding: 0.8rem 1.5rem;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    align-self: center;
    border-radius: 6px;
}

#scan-btn:hover {
    background-color: #79b8ff;
    transform: translateY(-2px);
}

#scan-btn:disabled {
    background-color: var(--border);
    color: var(--foreground);
    cursor: not-allowed;
    transform: none;
}

#output {
    background-color: #010409;
    border: 1px solid var(--border);
    padding: 1rem;
    min-height: 200px;
    border-radius: 6px;
    overflow-y: auto;
    font-size: 0.9rem;
}

#output .prompt {
    color: var(--green);
}

.cursor {
    display: inline-block;
    background-color: var(--foreground);
    width: 10px;
    height: 1em;
    animation: blink 1s step-end infinite;
    vertical-align: text-bottom;
}

@keyframes blink {
    from, to { background-color: transparent; }
    50% { background-color: var(--foreground); }
}

.user-entry {
    margin-bottom: 0.5rem;
    line-height: 1.5;
    white-space: pre-wrap;
    opacity: 0;
    animation: fadeIn 0.5s forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

.user-entry .emoji {
    display: inline-block;
    width: 2ch;
}

.user-entry .distance {
    color: var(--green);
}

footer {
    text-align: center;
    font-size: 0.75rem;
    opacity: 0.5;
    line-height: 1.2;
}

footer p {
    margin: 0;
}