body {
    background: #f5f7fb;
    font-family: Arial, sans-serif;
}

.card-box {
    background: #fff;
    border-radius: 14px;
    padding: 24px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    overflow-x: auto;
}

.table td,
.table th {
    vertical-align: middle;
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.groups-stage {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}

.group-card {
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fb 100%);
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 14px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
}

.group-title {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 12px;
    color: #1f2937;
}

.group-match {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
}

.group-meta {
    font-size: 12px;
    color: #6b7280;
}

.bracket-board {
    display: grid;
    grid-template-columns: repeat(4, minmax(220px, 1fr));
    gap: 18px;
    align-items: start;
}

.bracket-stage {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 14px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}

.bracket-stage-title {
    text-align: center;
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 14px;
    color: #111827;
}

.bracket-center {
    border: 2px solid #d1d5db;
}

.bracket-match {
    background: #ffffff;
    border: 1px solid #dbe2ea;
    border-left: 4px solid #0d6efd;
    border-radius: 12px;
    padding: 10px;
    margin-bottom: 14px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.bracket-team-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    padding: 2px 0;
}

.bracket-team-row span {
    word-break: break-word;
}

.bracket-info {
    margin-top: 6px;
    font-size: 12px;
    color: #6b7280;
}

form.d-flex.gap-2 {
    flex-wrap: wrap;
}

form.d-flex.gap-2 input,
form.d-flex.gap-2 button {
    min-height: 38px;
}

@media (max-width: 1100px) {
    .bracket-board {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 992px) {
    .navbar .container {
        flex-direction: column;
        gap: 12px;
        align-items: stretch !important;
    }

    .navbar .container > div {
        width: 100%;
        justify-content: center !important;
        text-align: center;
    }

    .navbar-brand {
        text-align: center;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .card-box {
        padding: 16px;
    }

    .table-responsive {
        font-size: 14px;
    }

    .bracket-board {
        grid-template-columns: 1fr !important;
    }

    .groups-stage {
        grid-template-columns: 1fr !important;
    }

    .d-flex.gap-2 {
        flex-wrap: wrap;
    }

    form.d-flex.gap-2 {
        flex-direction: column;
    }

    form.d-flex.gap-2 input,
    form.d-flex.gap-2 button {
        width: 100% !important;
    }

    .bracket-team-row {
        font-size: 14px;
    }

    .bracket-info {
        font-size: 11px;
    }

    .btn {
        white-space: normal;
    }
}

@media (max-width: 576px) {
    .container {
        padding-left: 10px;
        padding-right: 10px;
    }

    .card-box {
        border-radius: 10px;
        padding: 14px;
    }

    h1, h2, h3 {
        font-size: 1.4rem;
    }

    .navbar-brand {
        font-size: 1.2rem;
    }

    .table {
        font-size: 13px;
    }
}

@media (max-width: 700px) {
    .bracket-board {
        grid-template-columns: 1fr;
    }
}