/* ========== 输入区域 ========== */
.input-area-container {
    padding: 16px 24px 20px;
    background: var(--color-white);
    border-top: 2px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-shrink: 0;
}

.input-controls-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 6px;
}
.control-label {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: var(--color-text-light);
    white-space: nowrap;
    letter-spacing: 1px;
}

select {
    padding: 12px 36px 12px 14px;
    font-size: var(--font-size-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-input-bg);
    cursor: pointer;
    font-family: inherit;
    color: var(--color-text);
    min-height: 48px;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23555' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    transition: border-color var(--transition);
    max-width: 240px;
}
select:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 124, 89, 0.15);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.skill-tag {
    padding: 10px 16px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: 20px;
    cursor: pointer;
    border: 2px solid var(--color-border);
    background: var(--color-white);
    color: var(--color-text-light);
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
    font-family: inherit;
    letter-spacing: 1px;
    min-height: 42px;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.skill-tag:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: #f9faf7;
}
.skill-tag.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.input-row {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}
.input-row textarea {
    flex: 1;
    padding: 16px 18px;
    font-size: var(--font-size-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    resize: none;
    min-height: 70px;
    max-height: 160px;
    font-family: inherit;
    background: var(--color-input-bg);
    line-height: 1.6;
    transition: border-color var(--transition);
    color: var(--color-text);
}
.input-row textarea:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 124, 89, 0.15);
}
.input-row textarea::placeholder {
    color: #b0aca5;
    font-size: var(--font-size-md);
}

.send-btn {
    padding: 16px 28px;
    font-size: var(--font-size-lg);
    font-weight: 700;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    min-height: 70px;
    min-width: 90px;
    letter-spacing: 2px;
    font-family: inherit;
    box-shadow: var(--shadow-sm);
}
.send-btn:hover {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.send-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}
.send-btn:disabled {
    background: #c5c0b8;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* 文件上传 */
.file-upload-btn {
    height: 48px;
    padding: 0 18px;
    border-radius: var(--radius-md);
    border: 2px dashed var(--color-border);
    background: var(--color-input-bg);
    cursor: pointer;
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all var(--transition);
    color: var(--color-text-light);
    flex-shrink: 0;
    position: relative;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    letter-spacing: 1px;
}
.file-upload-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-style: solid;
}
.file-upload-btn input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}
.file-preview-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: #e8f0ea;
    border-radius: 12px;
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 600;
    flex-shrink: 0;
    overflow: hidden;
    white-space: nowrap;
}
.file-preview-indicator #fileName {
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 360px;
}
.file-preview-indicator .remove-file {
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-danger);
    flex-shrink: 0;
    line-height: 1;
    padding: 4px 10px;
    border-radius: 6px;
    background: rgba(211, 78, 78, 0.1);
    transition: all var(--transition);
}
.file-preview-indicator .remove-file:hover {
    background: rgba(211, 78, 78, 0.2);
    color: #b33;
}