/* Shared styles for challenge pages (login forms, buttons, etc.) */

:root {
    --ch-bg: #0c0f14;
    --ch-card: #151a22;
    --ch-text: #b8c4d4;
    --ch-muted: #6b7a8f;
    --ch-accent: #22c55e;
    --ch-accent-hover: #4ade80;
    --ch-danger: #ef4444;
    --ch-border: rgba(34, 197, 94, 0.25);
    --ch-radius: 10px;
    --ch-font: 'DM Mono', 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;0,600&display=swap');

body {
    margin: 0;
    min-height: 100vh;
    background: var(--ch-bg);
    color: var(--ch-text);
    font-family: var(--ch-font);
    font-size: 15px;
    line-height: 1.6;
}

body::after {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(rgba(34, 197, 94, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(34, 197, 94, 0.04) 1px, transparent 1px);
    background-size: 28px 28px;
    pointer-events: none;
}

.back-link {
    margin: 0 0 0.75rem;
    font-size: 0.9rem;
    text-align: left;
}

.back-link a {
    color: var(--ch-accent);
    text-decoration: none;
}

.back-link a:hover {
    color: var(--ch-accent-hover);
}

header {
    padding: 2rem 1.5rem 1rem;
    max-width: 440px;
    margin: 0 auto;
}

header h1 {
    font-size: clamp(1.4rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--ch-accent);
    margin: 0 0 0.5rem;
    text-align: center;
}

.challenge-description {
    max-width: 440px;
    margin: 0 auto 1.5rem;
    padding: 0 1.5rem;
    font-size: 0.95rem;
    color: var(--ch-muted);
    text-align: center;
}

.challenge-description p {
    margin: 0 0 0.5rem;
}

.challenge-description .hint {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    opacity: 0.9;
}

.challenge-description code {
    background: rgba(34, 197, 94, 0.15);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.85em;
}

.login-container,
.challenge-content {
    max-width: 440px;
    margin: 0 auto 2rem;
    padding: 1.75rem 2rem;
    background: var(--ch-card);
    border: 1px solid var(--ch-border);
    border-radius: var(--ch-radius);
    text-align: left;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.login-container h2,
.challenge-content h2 {
    font-size: 1.1rem;
    color: var(--ch-accent);
    margin: 0 0 1.25rem;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.9rem;
    margin-bottom: 0.4rem;
    color: var(--ch-text);
}

input[type="text"],
input[type="password"],
textarea {
    width: 100%;
    padding: 0.7rem 1rem;
    margin-bottom: 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    background: var(--ch-bg);
    border: 1px solid var(--ch-border);
    border-radius: 6px;
    color: var(--ch-text);
    box-sizing: border-box;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--ch-accent);
}

.error-messages,
#error-messages,
#response-box {
    margin-bottom: 1rem;
    padding: 0.6rem 1rem;
    font-size: 0.9rem;
    border-radius: 6px;
    background: rgba(239, 68, 68, 0.1);
    color: var(--ch-danger);
    text-align: left;
}

/* Hide error/response block when empty so it doesn’t show a red box before any error */
.error-messages:empty,
#error-messages:empty {
    display: none;
}

button,
.btn {
    display: block;
    width: 100%;
    padding: 0.75rem 1.25rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    background: var(--ch-accent);
    color: var(--ch-bg);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    text-align: center;
    box-sizing: border-box;
}

button:hover,
.btn:hover {
    background: var(--ch-accent-hover);
    transform: translateY(-1px);
}

.comments {
    margin-top: 1.5rem;
    padding: 0;
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
}

.comments h2 {
    font-size: 1rem;
    color: var(--ch-accent);
    margin-bottom: 0.75rem;
    text-align: left;
}

#comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#comment-list li {
    margin-bottom: 0.5rem;
}

#comment-list a {
    color: var(--ch-accent);
    text-decoration: none;
}

#comment-list a:hover {
    text-decoration: underline;
}

.output-section {
    max-width: 440px;
    margin: 2rem auto 0;
    padding: 0 1.5rem;
    text-align: left;
}

.output-section h2 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    text-align: left;
}

.output-box,
#output {
    min-height: 60px;
    padding: 1rem;
    background: var(--ch-bg);
    border: 1px solid var(--ch-border);
    border-radius: 6px;
    word-wrap: break-word;
}