/* Scope CSS cho component */
.tool-container {
    --box-bg: #ffffff;
    --border-color: #111111;
    --shadow-color: #111111;
    --btn-secondary: #ffdac1; /* Pastel Orange */
    --btn-clear: #ffb7b2;     /* Pastel Red */
    --highlight-bg: #b5ead7;  /* Pastel Green cho kết quả bôi sáng */
    
    --border-width: 3px;
    --border-radius: 12px;
    --shadow-offset: 6px;

    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--box-bg);
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-offset) var(--shadow-offset) 0px var(--shadow-color);
    padding: 30px;
    color: var(--border-color);
    box-sizing: border-box;
    line-height: 1.6;
}

.tool-container h1 {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 25px;
    text-transform: uppercase;
    font-weight: 800;
    margin-top: 0;
}

.tool-container .input-group,
.tool-container .output-group { 
    margin-bottom: 20px; 
}

.tool-container label { 
    display: block; 
    font-weight: 900;       /* Tăng độ dày chữ lên mức tối đa */
    color: #000000;         /* Đổi sang màu đen tuyền nguyên bản */
    margin-bottom: 10px; 
    font-size: 1.15rem;
}

/* Regex Builder UI */
.tool-container .regex-builder {
    display: flex;
    align-items: center;
    background-color: #f9f9f9;
    border: var(--border-width) solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 4px 4px 0px var(--shadow-color);
}

.tool-container .regex-slash {
    font-size: 1.2rem;
    font-weight: 900;
    padding: 10px 15px;
    background-color: #e2f0cb; /* Pastel Yellow-Green */
    color: var(--border-color);
    border-right: 2px solid var(--border-color);
}

.tool-container .regex-slash:nth-child(3) {
    border-right: none;
    border-left: 2px solid var(--border-color);
}

.tool-container input[type="text"] {
    border: none;
    padding: 12px 15px;
    font-size: 1.1rem;
    font-family: 'Consolas', 'Courier New', monospace;
    outline: none;
    background: transparent;
    color: var(--border-color);
}

.tool-container .regex-input {
    flex: 1;
    min-width: 0;
}

.tool-container .regex-flags {
    width: 60px;
    text-align: center;
    font-weight: bold;
}

/* Textarea */
.tool-container textarea {
    width: 100%;
    min-height: 120px;
    padding: 15px;
    font-size: 1rem;
    font-family: 'Consolas', 'Courier New', monospace;
    background-color: #f9f9f9;
    border: var(--border-width) solid var(--border-color);
    border-radius: 8px;
    resize: vertical;
    outline: none;
    box-sizing: border-box;
    color: var(--border-color);
}

.tool-container textarea:focus,
.tool-container .regex-builder:focus-within { 
    background-color: #fff; 
    box-shadow: 6px 6px 0px var(--shadow-color); 
}

/* Kết quả Highlight Box */
.tool-container .result-box {
    width: 100%;
    min-height: 80px;
    padding: 15px;
    font-size: 1rem;
    font-family: 'Consolas', 'Courier New', monospace;
    background-color: #fff;
    border: var(--border-width) solid var(--border-color);
    border-radius: 8px;
    box-sizing: border-box;
    white-space: pre-wrap; /* Giữ nguyên xuống dòng */
    word-break: break-all;
}

.tool-container mark {
    background-color: var(--highlight-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 0 2px;
    color: var(--border-color);
    font-weight: bold;
}

/* Match Details List */
.tool-container .match-list {
    background-color: #f9f9f9;
    border: var(--border-width) solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    max-height: 250px;
    overflow-y: auto;
}

.tool-container .match-item {
    padding: 10px;
    border: 2px dashed var(--border-color);
    margin-bottom: 10px;
    border-radius: 6px;
    background-color: #fff;
    font-family: 'Consolas', monospace;
}

.tool-container .match-item:last-child {
    margin-bottom: 0;
}

.tool-container .placeholder-text {
    color: #888;
    font-style: italic;
}

/* Buttons */
.tool-container .action-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px; /* Thêm khoảng cách đẩy phần kết quả bên dưới xuống */
}

.tool-container button {
    cursor: pointer;
    font-size: 1rem;
    font-weight: 700;
    padding: 12px 15px;
    border: var(--border-width) solid var(--border-color);
    border-radius: 8px;
    box-shadow: 4px 4px 0px var(--shadow-color);
    transition: transform 0.1s, box-shadow 0.1s;
    text-transform: uppercase;
    color: var(--border-color);
    display: inline-flex;
    box-sizing: border-box;
}

.tool-container button:active {
    transform: translate(4px, 4px);
    box-shadow: 0px 0px 0px var(--shadow-color);
}

.tool-container .btn-secondary { background-color: var(--btn-secondary); }
.tool-container .btn-clear { background-color: var(--btn-clear); }

/* Status Notifications */
.tool-container .status-message {
    margin-top: 15px;
    font-weight: bold;
    text-align: center;
    min-height: 24px;
}

.tool-container .text-error { color: #d9534f; font-weight: bold;}
.tool-container .text-success { color: #5cb85c; }