:root {
    --bg: #0b0f19;
    --surface: #151b29;
    --surface-hover: #1b2333;
    --border: #293449;
    --text: #f3f4f6;
    --muted: #9ca3af;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    background: var(--bg);
    color: var(--text);
}

a {
    color: inherit;
    text-decoration: none;
}

header {
    background: rgba(21, 27, 41, 0.95);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 18px 20px;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.4rem;
    font-weight: 800;
}

.logo span {
    color: var(--accent);
}

main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 30px 20px 100px;
}

.page-title {
    margin-bottom: 25px;
}

.page-title h1 {
    margin: 0;
    font-size: 2rem;
}

.page-title p {
    margin: 6px 0 0;
    color: var(--muted);
}

.concert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.concert-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;

    transition:
        transform 0.15s ease,
        background 0.15s ease,
        border-color 0.15s ease;
}

.concert-card:hover {
    transform: translateY(-3px);
    background: var(--surface-hover);
    border-color: #3b4860;
}

.concert-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #0f1420;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 3rem;
}

.concert-content {
    padding: 20px;
}

.concert-artist {
    margin: 0 0 12px;
    font-size: 1.35rem;
}

.concert-info {
    display: flex;
    flex-direction: column;
    gap: 7px;

    color: var(--muted);
    font-size: 0.95rem;
}

.empty {
    text-align: center;
    padding: 70px 20px;

    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 15px;
}

.empty h2 {
    margin: 0 0 8px;
}

.empty p {
    color: var(--muted);
    margin: 0;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;

    padding: 11px 17px;
    border-radius: 10px;

    background: var(--accent);
    color: white;

    font-weight: 600;
    border: 0;
    cursor: pointer;

    transition: background 0.15s ease;
}

.button:hover {
    background: var(--accent-hover);
}

.button-secondary {
    background: var(--surface);
    border: 1px solid var(--border);
}

.button-secondary:hover {
    background: var(--surface-hover);
}

@media (max-width: 600px) {
    .header-inner {
        padding: 15px;
    }

    main {
        padding: 22px 15px 80px;
    }

    .page-title h1 {
        font-size: 1.6rem;
    }

    .concert-grid {
        grid-template-columns: 1fr;
    }
}
form {
    max-width: 650px;
    margin: 0 auto;
    text-align: left;
}

form p {
    margin: 0 0 18px;
}

label {
    display: block;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 600;
}

input,
textarea {
    width: 100%;
    margin-top: 7px;
    padding: 12px 14px;

    background: #0f1420;
    color: var(--text);

    border: 1px solid var(--border);
    border-radius: 9px;

    font: inherit;
}

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

textarea {
    resize: vertical;
}

form .button {
    margin-right: 8px;
    margin-top: 5px;
}
.venue-search {
    position: relative;
    max-width: 650px;
    margin: 0 auto 18px;
    text-align: left;
}

.venue-search label {
    display: block;
}

.venue-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;

    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;

    margin-top: 5px;
    overflow: hidden;

    z-index: 50;
}

.venue-result {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 3px;

    padding: 12px 14px;

    background: transparent;
    color: var(--text);

    border: 0;
    border-bottom: 1px solid var(--border);

    text-align: left;
    cursor: pointer;

    font: inherit;
}

.venue-result:last-child {
    border-bottom: 0;
}

.venue-result:hover {
    background: var(--surface-hover);
}

.venue-result strong {
    font-size: 0.95rem;
}

.venue-result span {
    color: var(--muted);
    font-size: 0.85rem;
}