/* ================================================================
   キーワード掛け合わせツール
   Prefix: kwc- (KeyWord Combiner)
   ================================================================ */

/* ----------------------------------------------------------------
   Variables
   ---------------------------------------------------------------- */
:root {
    --kwc-primary: #2e7d32;
    --kwc-primary-l: #4caf50;
    --kwc-secondary: #1565c0;
    --kwc-accent: #ff8f00;
    --kwc-bg: #f5f7f5;
    --kwc-card: #ffffff;
    --kwc-text: #333333;
    --kwc-muted: #757575;
    --kwc-border: #e0e0e0;
    --kwc-danger: #d32f2f;
    --kwc-warn: #f57c00;
    --kwc-shadow: 0 2px 10px rgba(0, 0, 0, .07);
}

/* ----------------------------------------------------------------
   Container
   ---------------------------------------------------------------- */
.kwc-container {
    max-width: 900px;
    margin: 0 auto;
}

/* ----------------------------------------------------------------
   Input Area — Group Grid
   ---------------------------------------------------------------- */
.kwc-groups-wrap {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.kwc-group {
    flex: 1 1 160px;
    background: var(--kwc-card);
    border: 2px solid var(--kwc-border);
    border-radius: 10px;
    padding: 14px 14px 10px;
    box-shadow: var(--kwc-shadow);
    transition: border-color .2s;
    min-width: 0;
}

.kwc-group:focus-within {
    border-color: var(--kwc-primary);
}

.kwc-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.kwc-group-label {
    font-size: 13px;
    font-weight: 700;
    color: var(--kwc-primary);
    letter-spacing: .03em;
}

.kwc-group-del {
    width: 22px;
    height: 22px;
    border: none;
    background: #ffebee;
    color: var(--kwc-danger);
    border-radius: 50%;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .15s;
    font-family: inherit;
}

.kwc-group-del:hover {
    background: #ffcdd2;
}

.kwc-group-del:disabled {
    opacity: 0;
    pointer-events: none;
}

.kwc-textarea {
    width: 100%;
    height: 150px;
    border: none;
    border-left: 3px solid var(--kwc-primary);
    border-radius: 0 6px 6px 0;
    padding: 10px 12px;
    font-size: 14px;
    font-family: 'Consolas', 'Courier New', monospace;
    line-height: 1.7;
    color: var(--kwc-text);
    background: #f9fdf9;
    resize: vertical;
    box-sizing: border-box;
    outline: none;
    transition: border-color .15s;
}

.kwc-textarea:focus {
    border-left-color: var(--kwc-primary-l);
    background: #fff;
}

.kwc-group-count {
    margin-top: 6px;
    font-size: 11px;
    color: var(--kwc-muted);
    text-align: right;
}

/* ----------------------------------------------------------------
   Group Control Buttons
   ---------------------------------------------------------------- */
.kwc-group-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.kwc-btn {
    padding: 9px 18px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: all .15s;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.kwc-btn-add {
    border: 2px solid var(--kwc-primary);
    color: var(--kwc-primary);
    background: #fff;
}

.kwc-btn-add:hover {
    background: #e8f5e9;
}

.kwc-btn-add:disabled {
    opacity: .4;
    pointer-events: none;
}

.kwc-btn-clear {
    border: 2px solid var(--kwc-border);
    color: var(--kwc-muted);
    background: #fff;
}

.kwc-btn-clear:hover {
    background: #f5f5f5;
    border-color: #bdbdbd;
}

/* ----------------------------------------------------------------
   Options Panel
   ---------------------------------------------------------------- */
.kwc-options {
    background: var(--kwc-card);
    border: 1px solid var(--kwc-border);
    border-radius: 10px;
    padding: 16px 20px;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    box-shadow: var(--kwc-shadow);
}

.kwc-opt-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.kwc-opt-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--kwc-muted);
    text-transform: uppercase;
    letter-spacing: .06em;
}

.kwc-opt-radios {
    display: flex;
    gap: 12px;
}

.kwc-radio-label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    cursor: pointer;
    color: var(--kwc-text);
}

.kwc-radio-label input[type="radio"] {
    accent-color: var(--kwc-primary);
}

.kwc-select {
    padding: 7px 10px;
    border: 1px solid var(--kwc-border);
    border-radius: 6px;
    font-size: 13px;
    background: #fafafa;
    color: var(--kwc-text);
    font-family: inherit;
    cursor: pointer;
}

.kwc-checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    cursor: pointer;
    color: var(--kwc-text);
}

.kwc-checkbox-label input[type="checkbox"] {
    accent-color: var(--kwc-primary);
    width: 15px;
    height: 15px;
}

/* ----------------------------------------------------------------
   Alert messages
   ---------------------------------------------------------------- */
.kwc-alert {
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    display: none;
}

.kwc-alert.visible {
    display: block;
}

.kwc-alert-warn {
    background: #fff3e0;
    color: var(--kwc-warn);
    border: 1px solid #ffe0b2;
}

.kwc-alert-error {
    background: #ffebee;
    color: var(--kwc-danger);
    border: 1px solid #ffcdd2;
}

/* ----------------------------------------------------------------
   Output Area
   ---------------------------------------------------------------- */
.kwc-output-wrap {
    background: var(--kwc-card);
    border: 2px solid var(--kwc-border);
    border-radius: 10px;
    padding: 20px;
    box-shadow: var(--kwc-shadow);
    margin-bottom: 20px;
}

.kwc-output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    gap: 10px;
    flex-wrap: wrap;
}

.kwc-count-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    background: var(--kwc-primary);
    color: #fff;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
}

.kwc-count-badge.zero {
    background: var(--kwc-border);
    color: var(--kwc-muted);
}

.kwc-output-btns {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.kwc-btn-copy {
    border: 2px solid var(--kwc-secondary);
    color: var(--kwc-secondary);
    background: #fff;
}

.kwc-btn-copy:hover {
    background: #e3f2fd;
}

.kwc-btn-copy.copied {
    background: var(--kwc-primary);
    border-color: var(--kwc-primary);
    color: #fff;
}

.kwc-btn-csv {
    border: 2px solid var(--kwc-accent);
    color: var(--kwc-accent);
    background: #fff;
}

.kwc-btn-csv:hover {
    background: #fff8e1;
}

.kwc-btn-reset {
    border: 2px solid var(--kwc-border);
    color: var(--kwc-muted);
    background: #fff;
}

.kwc-btn-reset:hover {
    background: #f5f5f5;
}

.kwc-output-textarea {
    width: 100%;
    height: 300px;
    max-height: 400px;
    border: 1px solid var(--kwc-border);
    border-radius: 8px;
    padding: 12px;
    font-size: 14px;
    font-family: 'Consolas', 'Courier New', monospace;
    line-height: 1.8;
    color: var(--kwc-text);
    background: #f9fdf9;
    resize: vertical;
    box-sizing: border-box;
    outline: none;
    overflow-y: auto;
}

/* ----------------------------------------------------------------
   Responsive
   ---------------------------------------------------------------- */
@media (max-width: 640px) {
    .kwc-groups-wrap {
        flex-direction: column;
    }

    .kwc-group {
        flex: none;
        width: 100%;
    }

    .kwc-options {
        flex-direction: column;
        align-items: flex-start;
    }

    .kwc-output-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .kwc-btn {
        padding: 8px 14px;
        font-size: 12px;
    }
}