* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: #0d1117;
    color: #e6edf3;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    width: min(1100px, 92%);
    margin: 0 auto;
    padding: 30px 0 60px;
}

a {
    color: inherit;
}

.back-link {
    display: inline-block;
    margin-bottom: 25px;
    color: #9da7b3;
    text-decoration: none;
}

.back-link:hover {
    color: #ffffff;
}

.detail-actions {
    margin-top: 30px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.detail-actions form {
    margin: 0;
}

.concert-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    background: #161b22;
    border: 1px solid #3d4856;
    border-radius: 9px;
    color: #e6edf3;
    font: inherit;
    font-weight: bold;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.concert-action:hover {
    border-color: #58a6ff;
    background: #1b3554;
}

.concert-action-edit {
    border-color: #58a6ff;
    background: #1b3554;
}

.concert-action-edit:hover {
    background: #24476d;
}

.concert-action-delete {
    border-color: #9f3a38;
    background: #321617;
}

.concert-action-delete:hover {
    border-color: #f87171;
    background: #4b1d20;
}

.concert-detail {
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.flyer-container {
    width: 100%;
    background: #0a0d12;
    display: flex;
    justify-content: center;
    padding: 25px;
}

.concert-flyer {
    display: block;
    max-width: 100%;
    max-height: 700px;
    object-fit: contain;
    border-radius: 10px;
}

.concert-content {
    padding: 35px;
}

.concert-content h1 {
    margin-top: 0;
    margin-bottom: 30px;
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.1;
}

.concert-info {
    display: grid;
    grid-template-columns: repeat(
        auto-fit,
        minmax(220px, 1fr)
    );
    gap: 15px;
}

.info-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 18px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
}

.info-icon {
    font-size: 1.5rem;
}

.info-item strong {
    color: #ffffff;
}

.description {
    margin-top: 35px;
    padding-top: 30px;
    border-top: 1px solid #30363d;
}

.description h2,
.coming-soon h2 {
    margin-top: 0;
}

.description p {
    color: #b8c1cc;
    line-height: 1.7;
    white-space: pre-wrap;
}

.ticket-button-container {
    margin-top: 30px;
}

.ticket-button {
    display: inline-block;
    padding: 13px 22px;
    background: #238636;
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: bold;
}

.ticket-button:hover {
    background: #2ea043;
}

.coming-soon {
    margin-top: 35px;
    padding: 25px;
    background: #0d1117;
    border: 1px dashed #30363d;
    border-radius: 12px;
}

.coming-soon p {
    color: #8b949e;
}

.attendance-section {
    margin-top: 35px;
    padding: 25px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
}

.attendance-section h2 {
    margin-top: 0;
}

.attendance-section > p {
    color: #8b949e;
}

.attendance-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 18px;
}

.attendance-actions form {
    margin: 0;
}

.attendance-option {
    padding: 10px 14px;
    background: #161b22;
    border: 1px solid #3d4856;
    border-radius: 9px;
    color: #e6edf3;
    font: inherit;
    font-weight: bold;
    cursor: pointer;
}

.attendance-option:hover,
.attendance-option.is-selected {
    border-color: #58a6ff;
    background: #1b3554;
}

.attendance-option.is-selected {
    color: #ffffff;
}

.attendance-list {
    margin-top: 20px;
    color: #b8c1cc;
}

.attendance-list summary {
    color: #58a6ff;
    font-weight: bold;
    cursor: pointer;
}

.attendance-list ul {
    margin: 12px 0 0;
    padding-left: 22px;
}

.attendance-groups {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-top: 14px;
}

.attendance-groups h3 {
    margin: 0;
    font-size: 1rem;
    color: #e6edf3;
}

.attendance-groups p {
    margin-bottom: 0;
}

.comments-section {
    margin-top: 35px;
    padding: 25px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
}

.comments-section h2 {
    margin-top: 0;
}

.comment-form {
    margin: 0;
}

.comment-form label {
    display: block;
    color: #b8c1cc;
    margin-bottom: 8px;
}

.comment-form textarea {
    width: 100%;
    padding: 12px;
    resize: vertical;
    background: #161b22;
    border: 1px solid #3d4856;
    border-radius: 9px;
    color: #e6edf3;
    font: inherit;
}

.comment-submit {
    margin-top: 10px;
}

.comment-list {
    display: grid;
    gap: 12px;
    margin-top: 22px;
}

.comment {
    padding: 16px;
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 10px;
}

.comment-meta {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    color: #b8c1cc;
}

.comment-meta span {
    font-size: 0.9rem;
}

.comment p {
    margin: 10px 0 0;
    line-height: 1.55;
    white-space: pre-wrap;
}

.comments-empty {
    margin-bottom: 0;
    color: #8b949e;
}

@media (max-width: 600px) {

    .container {
        width: 94%;
        padding-top: 20px;
    }

    .concert-content {
        padding: 22px;
    }

    .flyer-container {
        padding: 12px;
    }

    .concert-flyer {
        max-height: 600px;
    }

}